| /* vi: set sw=4 ts=4: */ |
| /* |
| * awk implementation for busybox |
| * |
| * Copyright (C) 2002 by Dmitry Zakharov <dmit@crp.bank.gov.ua> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| //config:config AWK |
| //config: bool "awk (23 kb)" |
| //config: default y |
| //config: help |
| //config: Awk is used as a pattern scanning and processing language. |
| //config: |
| //config:config FEATURE_AWK_LIBM |
| //config: bool "Enable math functions (requires libm)" |
| //config: default y |
| //config: depends on AWK |
| //config: help |
| //config: Enable math functions of the Awk programming language. |
| //config: NOTE: This requires libm to be present for linking. |
| //config: |
| //config:config FEATURE_AWK_GNU_EXTENSIONS |
| //config: bool "Enable a few GNU extensions" |
| //config: default y |
| //config: depends on AWK |
| //config: help |
| //config: Enable a few features from gawk: |
| //config: * command line option -e AWK_PROGRAM |
| //config: * simultaneous use of -f and -e on the command line. |
| //config: This enables the use of awk library files. |
| //config: Example: awk -f mylib.awk -e '{print myfunction($1);}' ... |
| |
| //applet:IF_AWK(APPLET_NOEXEC(awk, awk, BB_DIR_USR_BIN, BB_SUID_DROP, awk)) |
| |
| //kbuild:lib-$(CONFIG_AWK) += awk.o |
| |
| //usage:#define awk_trivial_usage |
| //usage: "[OPTIONS] [AWK_PROGRAM] [FILE]..." |
| //usage:#define awk_full_usage "\n\n" |
| //usage: " -v VAR=VAL Set variable" |
| //usage: "\n -F SEP Use SEP as field separator" |
| //usage: "\n -f FILE Read program from FILE" |
| //usage: IF_FEATURE_AWK_GNU_EXTENSIONS( |
| //usage: "\n -e AWK_PROGRAM" |
| //usage: ) |
| |
| #include "libbb.h" |
| #include "xregex.h" |
| #include <math.h> |
| |
| /* This is a NOEXEC applet. Be very careful! */ |
| |
| |
| /* If you comment out one of these below, it will be #defined later |
| * to perform debug printfs to stderr: */ |
| #define debug_printf_walker(...) do {} while (0) |
| #define debug_printf_eval(...) do {} while (0) |
| #define debug_printf_parse(...) do {} while (0) |
| |
| #ifndef debug_printf_walker |
| # define debug_printf_walker(...) (fprintf(stderr, __VA_ARGS__)) |
| #endif |
| #ifndef debug_printf_eval |
| # define debug_printf_eval(...) (fprintf(stderr, __VA_ARGS__)) |
| #endif |
| #ifndef debug_printf_parse |
| # define debug_printf_parse(...) (fprintf(stderr, __VA_ARGS__)) |
| #endif |
| |
| |
| /* "+": stop on first non-option: |
| * $ awk 'BEGIN { for(i=1; i<ARGC; ++i) { print i ": " ARGV[i] }}' -argz |
| * 1: -argz |
| */ |
| #define OPTSTR_AWK "+" \ |
| "F:v:*f:*" \ |
| IF_FEATURE_AWK_GNU_EXTENSIONS("e:*") \ |
| "W:" |
| enum { |
| OPTBIT_F, /* define field separator */ |
| OPTBIT_v, /* define variable */ |
| OPTBIT_f, /* pull in awk program from file */ |
| IF_FEATURE_AWK_GNU_EXTENSIONS(OPTBIT_e,) /* -e AWK_PROGRAM */ |
| OPTBIT_W, /* -W ignored */ |
| OPT_F = 1 << OPTBIT_F, |
| OPT_v = 1 << OPTBIT_v, |
| OPT_f = 1 << OPTBIT_f, |
| OPT_e = IF_FEATURE_AWK_GNU_EXTENSIONS((1 << OPTBIT_e)) + 0, |
| OPT_W = 1 << OPTBIT_W |
| }; |
| |
| #define MAXVARFMT 240 |
| #define MINNVBLOCK 64 |
| |
| /* variable flags */ |
| #define VF_NUMBER 0x0001 /* 1 = primary type is number */ |
| #define VF_ARRAY 0x0002 /* 1 = it's an array */ |
| |
| #define VF_CACHED 0x0100 /* 1 = num/str value has cached str/num eq */ |
| #define VF_USER 0x0200 /* 1 = user input (may be numeric string) */ |
| #define VF_SPECIAL 0x0400 /* 1 = requires extra handling when changed */ |
| #define VF_WALK 0x0800 /* 1 = variable has alloc'd x.walker list */ |
| #define VF_FSTR 0x1000 /* 1 = var::string points to fstring buffer */ |
| #define VF_CHILD 0x2000 /* 1 = function arg; x.parent points to source */ |
| #define VF_DIRTY 0x4000 /* 1 = variable was set explicitly */ |
| |
| /* these flags are static, don't change them when value is changed */ |
| #define VF_DONTTOUCH (VF_ARRAY | VF_SPECIAL | VF_WALK | VF_CHILD | VF_DIRTY) |
| |
| typedef struct walker_list { |
| char *end; |
| char *cur; |
| struct walker_list *prev; |
| char wbuf[1]; |
| } walker_list; |
| |
| /* Variable */ |
| typedef struct var_s { |
| unsigned type; /* flags */ |
| double number; |
| char *string; |
| union { |
| int aidx; /* func arg idx (for compilation stage) */ |
| struct xhash_s *array; /* array ptr */ |
| struct var_s *parent; /* for func args, ptr to actual parameter */ |
| walker_list *walker; /* list of array elements (for..in) */ |
| } x; |
| } var; |
| |
| /* Node chain (pattern-action chain, BEGIN, END, function bodies) */ |
| typedef struct chain_s { |
| struct node_s *first; |
| struct node_s *last; |
| const char *programname; |
| } chain; |
| |
| /* Function */ |
| typedef struct func_s { |
| unsigned nargs; |
| struct chain_s body; |
| } func; |
| |
| /* I/O stream */ |
| typedef struct rstream_s { |
| FILE *F; |
| char *buffer; |
| int adv; |
| int size; |
| int pos; |
| smallint is_pipe; |
| } rstream; |
| |
| typedef struct hash_item_s { |
| union { |
| struct var_s v; /* variable/array hash */ |
| struct rstream_s rs; /* redirect streams hash */ |
| struct func_s f; /* functions hash */ |
| } data; |
| struct hash_item_s *next; /* next in chain */ |
| char name[1]; /* really it's longer */ |
| } hash_item; |
| |
| typedef struct xhash_s { |
| unsigned nel; /* num of elements */ |
| unsigned csize; /* current hash size */ |
| unsigned nprime; /* next hash size in PRIMES[] */ |
| unsigned glen; /* summary length of item names */ |
| struct hash_item_s **items; |
| } xhash; |
| |
| /* Tree node */ |
| typedef struct node_s { |
| uint32_t info; |
| unsigned lineno; |
| union { |
| struct node_s *n; |
| var *v; |
| int aidx; |
| char *new_progname; |
| regex_t *re; |
| } l; |
| union { |
| struct node_s *n; |
| regex_t *ire; |
| func *f; |
| } r; |
| union { |
| struct node_s *n; |
| } a; |
| } node; |
| |
| /* Block of temporary variables */ |
| typedef struct nvblock_s { |
| int size; |
| var *pos; |
| struct nvblock_s *prev; |
| struct nvblock_s *next; |
| var nv[]; |
| } nvblock; |
| |
| typedef struct tsplitter_s { |
| node n; |
| regex_t re[2]; |
| } tsplitter; |
| |
| /* simple token classes */ |
| /* Order and hex values are very important!!! See next_token() */ |
| #define TC_SEQSTART (1 << 0) /* ( */ |
| #define TC_SEQTERM (1 << 1) /* ) */ |
| #define TC_REGEXP (1 << 2) /* /.../ */ |
| #define TC_OUTRDR (1 << 3) /* | > >> */ |
| #define TC_UOPPOST (1 << 4) /* unary postfix operator */ |
| #define TC_UOPPRE1 (1 << 5) /* unary prefix operator */ |
| #define TC_BINOPX (1 << 6) /* two-opnd operator */ |
| #define TC_IN (1 << 7) |
| #define TC_COMMA (1 << 8) |
| #define TC_PIPE (1 << 9) /* input redirection pipe */ |
| #define TC_UOPPRE2 (1 << 10) /* unary prefix operator */ |
| #define TC_ARRTERM (1 << 11) /* ] */ |
| #define TC_GRPSTART (1 << 12) /* { */ |
| #define TC_GRPTERM (1 << 13) /* } */ |
| #define TC_SEMICOL (1 << 14) |
| #define TC_NEWLINE (1 << 15) |
| #define TC_STATX (1 << 16) /* ctl statement (for, next...) */ |
| #define TC_WHILE (1 << 17) |
| #define TC_ELSE (1 << 18) |
| #define TC_BUILTIN (1 << 19) |
| /* This costs ~50 bytes of code. |
| * A separate class to support deprecated "length" form. If we don't need that |
| * (i.e. if we demand that only "length()" with () is valid), then TC_LENGTH |
| * can be merged with TC_BUILTIN: |
| */ |
| #define TC_LENGTH (1 << 20) |
| #define TC_GETLINE (1 << 21) |
| #define TC_FUNCDECL (1 << 22) /* 'function' 'func' */ |
| #define TC_BEGIN (1 << 23) |
| #define TC_END (1 << 24) |
| #define TC_EOF (1 << 25) |
| #define TC_VARIABLE (1 << 26) |
| #define TC_ARRAY (1 << 27) |
| #define TC_FUNCTION (1 << 28) |
| #define TC_STRING (1 << 29) |
| #define TC_NUMBER (1 << 30) |
| |
| #define TC_UOPPRE (TC_UOPPRE1 | TC_UOPPRE2) |
| |
| /* combined token classes */ |
| #define TC_BINOP (TC_BINOPX | TC_COMMA | TC_PIPE | TC_IN) |
| //#define TC_UNARYOP (TC_UOPPRE | TC_UOPPOST) |
| #define TC_OPERAND (TC_VARIABLE | TC_ARRAY | TC_FUNCTION \ |
| | TC_BUILTIN | TC_LENGTH | TC_GETLINE \ |
| | TC_SEQSTART | TC_STRING | TC_NUMBER) |
| |
| #define TC_STATEMNT (TC_STATX | TC_WHILE) |
| #define TC_OPTERM (TC_SEMICOL | TC_NEWLINE) |
| |
| /* word tokens, cannot mean something else if not expected */ |
| #define TC_WORD (TC_IN | TC_STATEMNT | TC_ELSE \ |
| | TC_BUILTIN | TC_LENGTH | TC_GETLINE \ |
| | TC_FUNCDECL | TC_BEGIN | TC_END) |
| |
| /* discard newlines after these */ |
| #define TC_NOTERM (TC_COMMA | TC_GRPSTART | TC_GRPTERM \ |
| | TC_BINOP | TC_OPTERM) |
| |
| /* what can expression begin with */ |
| #define TC_OPSEQ (TC_OPERAND | TC_UOPPRE | TC_REGEXP) |
| /* what can group begin with */ |
| #define TC_GRPSEQ (TC_OPSEQ | TC_OPTERM | TC_STATEMNT | TC_GRPSTART) |
| |
| /* if previous token class is CONCAT1 and next is CONCAT2, concatenation */ |
| /* operator is inserted between them */ |
| #define TC_CONCAT1 (TC_VARIABLE | TC_ARRTERM | TC_SEQTERM \ |
| | TC_STRING | TC_NUMBER | TC_UOPPOST) |
| #define TC_CONCAT2 (TC_OPERAND | TC_UOPPRE) |
| |
| #define OF_RES1 0x010000 |
| #define OF_RES2 0x020000 |
| #define OF_STR1 0x040000 |
| #define OF_STR2 0x080000 |
| #define OF_NUM1 0x100000 |
| #define OF_CHECKED 0x200000 |
| #define OF_REQUIRED 0x400000 |
| |
| |
| /* combined operator flags */ |
| #define xx 0 |
| #define xV OF_RES2 |
| #define xS (OF_RES2 | OF_STR2) |
| #define Vx OF_RES1 |
| #define Rx (OF_RES1 | OF_NUM1 | OF_REQUIRED) |
| #define VV (OF_RES1 | OF_RES2) |
| #define Nx (OF_RES1 | OF_NUM1) |
| #define NV (OF_RES1 | OF_NUM1 | OF_RES2) |
| #define Sx (OF_RES1 | OF_STR1) |
| #define SV (OF_RES1 | OF_STR1 | OF_RES2) |
| #define SS (OF_RES1 | OF_STR1 | OF_RES2 | OF_STR2) |
| |
| #define OPCLSMASK 0xFF00 |
| #define OPNMASK 0x007F |
| |
| /* operator priority is a highest byte (even: r->l, odd: l->r grouping) |
| * For builtins it has different meaning: n n s3 s2 s1 v3 v2 v1, |
| * n - min. number of args, vN - resolve Nth arg to var, sN - resolve to string |
| */ |
| #undef P |
| #undef PRIMASK |
| #undef PRIMASK2 |
| #define P(x) (x << 24) |
| #define PRIMASK 0x7F000000 |
| #define PRIMASK2 0x7E000000 |
| |
| /* Operation classes */ |
| |
| #define SHIFT_TIL_THIS 0x0600 |
| #define RECUR_FROM_THIS 0x1000 |
| |
| enum { |
| OC_DELETE = 0x0100, OC_EXEC = 0x0200, OC_NEWSOURCE = 0x0300, |
| OC_PRINT = 0x0400, OC_PRINTF = 0x0500, OC_WALKINIT = 0x0600, |
| |
| OC_BR = 0x0700, OC_BREAK = 0x0800, OC_CONTINUE = 0x0900, |
| OC_EXIT = 0x0a00, OC_NEXT = 0x0b00, OC_NEXTFILE = 0x0c00, |
| OC_TEST = 0x0d00, OC_WALKNEXT = 0x0e00, |
| |
| OC_BINARY = 0x1000, OC_BUILTIN = 0x1100, OC_COLON = 0x1200, |
| OC_COMMA = 0x1300, OC_COMPARE = 0x1400, OC_CONCAT = 0x1500, |
| OC_FBLTIN = 0x1600, OC_FIELD = 0x1700, OC_FNARG = 0x1800, |
| OC_FUNC = 0x1900, OC_GETLINE = 0x1a00, OC_IN = 0x1b00, |
| OC_LAND = 0x1c00, OC_LOR = 0x1d00, OC_MATCH = 0x1e00, |
| OC_MOVE = 0x1f00, OC_PGETLINE = 0x2000, OC_REGEXP = 0x2100, |
| OC_REPLACE = 0x2200, OC_RETURN = 0x2300, OC_SPRINTF = 0x2400, |
| OC_TERNARY = 0x2500, OC_UNARY = 0x2600, OC_VAR = 0x2700, |
| OC_DONE = 0x2800, |
| |
| ST_IF = 0x3000, ST_DO = 0x3100, ST_FOR = 0x3200, |
| ST_WHILE = 0x3300 |
| }; |
| |
| /* simple builtins */ |
| enum { |
| F_in, F_rn, F_co, F_ex, F_lg, F_si, F_sq, F_sr, |
| F_ti, F_le, F_sy, F_ff, F_cl |
| }; |
| |
| /* builtins */ |
| enum { |
| B_a2, B_ix, B_ma, B_sp, B_ss, B_ti, B_mt, B_lo, B_up, |
| B_ge, B_gs, B_su, |
| B_an, B_co, B_ls, B_or, B_rs, B_xo, |
| }; |
| |
| /* tokens and their corresponding info values */ |
| |
| #define NTC "\377" /* switch to next token class (tc<<1) */ |
| #define NTCC '\377' |
| |
| static const char tokenlist[] ALIGN1 = |
| "\1(" NTC /* TC_SEQSTART */ |
| "\1)" NTC /* TC_SEQTERM */ |
| "\1/" NTC /* TC_REGEXP */ |
| "\2>>" "\1>" "\1|" NTC /* TC_OUTRDR */ |
| "\2++" "\2--" NTC /* TC_UOPPOST */ |
| "\2++" "\2--" "\1$" NTC /* TC_UOPPRE1 */ |
| "\2==" "\1=" "\2+=" "\2-=" /* TC_BINOPX */ |
| "\2*=" "\2/=" "\2%=" "\2^=" |
| "\1+" "\1-" "\3**=" "\2**" |
| "\1/" "\1%" "\1^" "\1*" |
| "\2!=" "\2>=" "\2<=" "\1>" |
| "\1<" "\2!~" "\1~" "\2&&" |
| "\2||" "\1?" "\1:" NTC |
| "\2in" NTC /* TC_IN */ |
| "\1," NTC /* TC_COMMA */ |
| "\1|" NTC /* TC_PIPE */ |
| "\1+" "\1-" "\1!" NTC /* TC_UOPPRE2 */ |
| "\1]" NTC /* TC_ARRTERM */ |
| "\1{" NTC /* TC_GRPSTART */ |
| "\1}" NTC /* TC_GRPTERM */ |
| "\1;" NTC /* TC_SEMICOL */ |
| "\1\n" NTC /* TC_NEWLINE */ |
| "\2if" "\2do" "\3for" "\5break" /* TC_STATX */ |
| "\10continue" "\6delete" "\5print" |
| "\6printf" "\4next" "\10nextfile" |
| "\6return" "\4exit" NTC |
| "\5while" NTC /* TC_WHILE */ |
| "\4else" NTC /* TC_ELSE */ |
| "\3and" "\5compl" "\6lshift" "\2or" /* TC_BUILTIN */ |
| "\6rshift" "\3xor" |
| "\5close" "\6system" "\6fflush" "\5atan2" |
| "\3cos" "\3exp" "\3int" "\3log" |
| "\4rand" "\3sin" "\4sqrt" "\5srand" |
| "\6gensub" "\4gsub" "\5index" /* "\6length" was here */ |
| "\5match" "\5split" "\7sprintf" "\3sub" |
| "\6substr" "\7systime" "\10strftime" "\6mktime" |
| "\7tolower" "\7toupper" NTC |
| "\6length" NTC /* TC_LENGTH */ |
| "\7getline" NTC /* TC_GETLINE */ |
| "\4func" "\10function" NTC /* TC_FUNCDECL */ |
| "\5BEGIN" NTC /* TC_BEGIN */ |
| "\3END" /* TC_END */ |
| /* compiler adds trailing "\0" */ |
| ; |
| |
| #define OC_B OC_BUILTIN |
| |
| static const uint32_t tokeninfo[] = { |
| 0, |
| 0, |
| OC_REGEXP, |
| xS|'a', xS|'w', xS|'|', |
| OC_UNARY|xV|P(9)|'p', OC_UNARY|xV|P(9)|'m', |
| OC_UNARY|xV|P(9)|'P', OC_UNARY|xV|P(9)|'M', OC_FIELD|xV|P(5), |
| OC_COMPARE|VV|P(39)|5, OC_MOVE|VV|P(74), OC_REPLACE|NV|P(74)|'+', OC_REPLACE|NV|P(74)|'-', |
| OC_REPLACE|NV|P(74)|'*', OC_REPLACE|NV|P(74)|'/', OC_REPLACE|NV|P(74)|'%', OC_REPLACE|NV|P(74)|'&', |
| OC_BINARY|NV|P(29)|'+', OC_BINARY|NV|P(29)|'-', OC_REPLACE|NV|P(74)|'&', OC_BINARY|NV|P(15)|'&', |
| OC_BINARY|NV|P(25)|'/', OC_BINARY|NV|P(25)|'%', OC_BINARY|NV|P(15)|'&', OC_BINARY|NV|P(25)|'*', |
| OC_COMPARE|VV|P(39)|4, OC_COMPARE|VV|P(39)|3, OC_COMPARE|VV|P(39)|0, OC_COMPARE|VV|P(39)|1, |
| OC_COMPARE|VV|P(39)|2, OC_MATCH|Sx|P(45)|'!', OC_MATCH|Sx|P(45)|'~', OC_LAND|Vx|P(55), |
| OC_LOR|Vx|P(59), OC_TERNARY|Vx|P(64)|'?', OC_COLON|xx|P(67)|':', |
| OC_IN|SV|P(49), /* TC_IN */ |
| OC_COMMA|SS|P(80), |
| OC_PGETLINE|SV|P(37), |
| OC_UNARY|xV|P(19)|'+', OC_UNARY|xV|P(19)|'-', OC_UNARY|xV|P(19)|'!', |
| 0, /* ] */ |
| 0, |
| 0, |
| 0, |
| 0, /* \n */ |
| ST_IF, ST_DO, ST_FOR, OC_BREAK, |
| OC_CONTINUE, OC_DELETE|Rx, OC_PRINT, |
| OC_PRINTF, OC_NEXT, OC_NEXTFILE, |
| OC_RETURN|Vx, OC_EXIT|Nx, |
| ST_WHILE, |
| 0, /* else */ |
| OC_B|B_an|P(0x83), OC_B|B_co|P(0x41), OC_B|B_ls|P(0x83), OC_B|B_or|P(0x83), |
| OC_B|B_rs|P(0x83), OC_B|B_xo|P(0x83), |
| OC_FBLTIN|Sx|F_cl, OC_FBLTIN|Sx|F_sy, OC_FBLTIN|Sx|F_ff, OC_B|B_a2|P(0x83), |
| OC_FBLTIN|Nx|F_co, OC_FBLTIN|Nx|F_ex, OC_FBLTIN|Nx|F_in, OC_FBLTIN|Nx|F_lg, |
| OC_FBLTIN|F_rn, OC_FBLTIN|Nx|F_si, OC_FBLTIN|Nx|F_sq, OC_FBLTIN|Nx|F_sr, |
| OC_B|B_ge|P(0xd6), OC_B|B_gs|P(0xb6), OC_B|B_ix|P(0x9b), /* OC_FBLTIN|Sx|F_le, was here */ |
| OC_B|B_ma|P(0x89), OC_B|B_sp|P(0x8b), OC_SPRINTF, OC_B|B_su|P(0xb6), |
| OC_B|B_ss|P(0x8f), OC_FBLTIN|F_ti, OC_B|B_ti|P(0x0b), OC_B|B_mt|P(0x0b), |
| OC_B|B_lo|P(0x49), OC_B|B_up|P(0x49), |
| OC_FBLTIN|Sx|F_le, /* TC_LENGTH */ |
| OC_GETLINE|SV|P(0), |
| 0, 0, |
| 0, |
| 0 /* TC_END */ |
| }; |
| |
| /* internal variable names and their initial values */ |
| /* asterisk marks SPECIAL vars; $ is just no-named Field0 */ |
| enum { |
| CONVFMT, OFMT, FS, OFS, |
| ORS, RS, RT, FILENAME, |
| SUBSEP, F0, ARGIND, ARGC, |
| ARGV, ERRNO, FNR, NR, |
| NF, IGNORECASE, ENVIRON, NUM_INTERNAL_VARS |
| }; |
| |
| static const char vNames[] ALIGN1 = |
| "CONVFMT\0" "OFMT\0" "FS\0*" "OFS\0" |
| "ORS\0" "RS\0*" "RT\0" "FILENAME\0" |
| "SUBSEP\0" "$\0*" "ARGIND\0" "ARGC\0" |
| "ARGV\0" "ERRNO\0" "FNR\0" "NR\0" |
| "NF\0*" "IGNORECASE\0*" "ENVIRON\0" "\0"; |
| |
| static const char vValues[] ALIGN1 = |
| "%.6g\0" "%.6g\0" " \0" " \0" |
| "\n\0" "\n\0" "\0" "\0" |
| "\034\0" "\0" "\377"; |
| |
| /* hash size may grow to these values */ |
| #define FIRST_PRIME 61 |
| static const uint16_t PRIMES[] ALIGN2 = { 251, 1021, 4093, 16381, 65521 }; |
| |
| |
| /* Globals. Split in two parts so that first one is addressed |
| * with (mostly short) negative offsets. |
| * NB: it's unsafe to put members of type "double" |
| * into globals2 (gcc may fail to align them). |
| */ |
| struct globals { |
| double t_double; |
| chain beginseq, mainseq, endseq; |
| chain *seq; |
| node *break_ptr, *continue_ptr; |
| rstream *iF; |
| xhash *vhash, *ahash, *fdhash, *fnhash; |
| const char *g_progname; |
| int g_lineno; |
| int nfields; |
| int maxfields; /* used in fsrealloc() only */ |
| var *Fields; |
| nvblock *g_cb; |
| char *g_pos; |
| char *g_buf; |
| smallint icase; |
| smallint exiting; |
| smallint nextrec; |
| smallint nextfile; |
| smallint is_f0_split; |
| smallint t_rollback; |
| }; |
| struct globals2 { |
| uint32_t t_info; /* often used */ |
| uint32_t t_tclass; |
| char *t_string; |
| int t_lineno; |
| |
| var *intvar[NUM_INTERNAL_VARS]; /* often used */ |
| |
| /* former statics from various functions */ |
| char *split_f0__fstrings; |
| |
| uint32_t next_token__save_tclass; |
| uint32_t next_token__save_info; |
| uint32_t next_token__ltclass; |
| smallint next_token__concat_inserted; |
| |
| smallint next_input_file__files_happen; |
| rstream next_input_file__rsm; |
| |
| var *evaluate__fnargs; |
| unsigned evaluate__seed; |
| regex_t evaluate__sreg; |
| |
| var ptest__v; |
| |
| tsplitter exec_builtin__tspl; |
| |
| /* biggest and least used members go last */ |
| tsplitter fsplitter, rsplitter; |
| }; |
| #define G1 (ptr_to_globals[-1]) |
| #define G (*(struct globals2 *)ptr_to_globals) |
| /* For debug. nm --size-sort awk.o | grep -vi ' [tr] ' */ |
| /*char G1size[sizeof(G1)]; - 0x74 */ |
| /*char Gsize[sizeof(G)]; - 0x1c4 */ |
| /* Trying to keep most of members accessible with short offsets: */ |
| /*char Gofs_seed[offsetof(struct globals2, evaluate__seed)]; - 0x90 */ |
| #define t_double (G1.t_double ) |
| #define beginseq (G1.beginseq ) |
| #define mainseq (G1.mainseq ) |
| #define endseq (G1.endseq ) |
| #define seq (G1.seq ) |
| #define break_ptr (G1.break_ptr ) |
| #define continue_ptr (G1.continue_ptr) |
| #define iF (G1.iF ) |
| #define vhash (G1.vhash ) |
| #define ahash (G1.ahash ) |
| #define fdhash (G1.fdhash ) |
| #define fnhash (G1.fnhash ) |
| #define g_progname (G1.g_progname ) |
| #define g_lineno (G1.g_lineno ) |
| #define nfields (G1.nfields ) |
| #define maxfields (G1.maxfields ) |
| #define Fields (G1.Fields ) |
| #define g_cb (G1.g_cb ) |
| #define g_pos (G1.g_pos ) |
| #define g_buf (G1.g_buf ) |
| #define icase (G1.icase ) |
| #define exiting (G1.exiting ) |
| #define nextrec (G1.nextrec ) |
| #define nextfile (G1.nextfile ) |
| #define is_f0_split (G1.is_f0_split ) |
| #define t_rollback (G1.t_rollback ) |
| #define t_info (G.t_info ) |
| #define t_tclass (G.t_tclass ) |
| #define t_string (G.t_string ) |
| #define t_lineno (G.t_lineno ) |
| #define intvar (G.intvar ) |
| #define fsplitter (G.fsplitter ) |
| #define rsplitter (G.rsplitter ) |
| #define INIT_G() do { \ |
| SET_PTR_TO_GLOBALS((char*)xzalloc(sizeof(G1)+sizeof(G)) + sizeof(G1)); \ |
| G.next_token__ltclass = TC_OPTERM; \ |
| G.evaluate__seed = 1; \ |
| } while (0) |
| |
| |
| /* function prototypes */ |
| static void handle_special(var *); |
| static node *parse_expr(uint32_t); |
| static void chain_group(void); |
| static var *evaluate(node *, var *); |
| static rstream *next_input_file(void); |
| static int fmt_num(char *, int, const char *, double, int); |
| static int awk_exit(int) NORETURN; |
| |
| /* ---- error handling ---- */ |
| |
| static const char EMSG_INTERNAL_ERROR[] ALIGN1 = "Internal error"; |
| static const char EMSG_UNEXP_EOS[] ALIGN1 = "Unexpected end of string"; |
| static const char EMSG_UNEXP_TOKEN[] ALIGN1 = "Unexpected token"; |
| static const char EMSG_DIV_BY_ZERO[] ALIGN1 = "Division by zero"; |
| static const char EMSG_INV_FMT[] ALIGN1 = "Invalid format specifier"; |
| static const char EMSG_TOO_FEW_ARGS[] ALIGN1 = "Too few arguments"; |
| static const char EMSG_NOT_ARRAY[] ALIGN1 = "Not an array"; |
| static const char EMSG_POSSIBLE_ERROR[] ALIGN1 = "Possible syntax error"; |
| static const char EMSG_UNDEF_FUNC[] ALIGN1 = "Call to undefined function"; |
| static const char EMSG_NO_MATH[] ALIGN1 = "Math support is not compiled in"; |
| static const char EMSG_NEGATIVE_FIELD[] ALIGN1 = "Access to negative field"; |
| |
| static void zero_out_var(var *vp) |
| { |
| memset(vp, 0, sizeof(*vp)); |
| } |
| |
| static void syntax_error(const char *message) NORETURN; |
| static void syntax_error(const char *message) |
| { |
| bb_error_msg_and_die("%s:%i: %s", g_progname, g_lineno, message); |
| } |
| |
| /* ---- hash stuff ---- */ |
| |
| static unsigned hashidx(const char *name) |
| { |
| unsigned idx = 0; |
| |
| while (*name) |
| idx = *name++ + (idx << 6) - idx; |
| return idx; |
| } |
| |
| /* create new hash */ |
| static xhash *hash_init(void) |
| { |
| xhash *newhash; |
| |
| newhash = xzalloc(sizeof(*newhash)); |
| newhash->csize = FIRST_PRIME; |
| newhash->items = xzalloc(FIRST_PRIME * sizeof(newhash->items[0])); |
| |
| return newhash; |
| } |
| |
| /* find item in hash, return ptr to data, NULL if not found */ |
| static void *hash_search(xhash *hash, const char *name) |
| { |
| hash_item *hi; |
| |
| hi = hash->items[hashidx(name) % hash->csize]; |
| while (hi) { |
| if (strcmp(hi->name, name) == 0) |
| return &hi->data; |
| hi = hi->next; |
| } |
| return NULL; |
| } |
| |
| /* grow hash if it becomes too big */ |
| static void hash_rebuild(xhash *hash) |
| { |
| unsigned newsize, i, idx; |
| hash_item **newitems, *hi, *thi; |
| |
| if (hash->nprime == ARRAY_SIZE(PRIMES)) |
| return; |
| |
| newsize = PRIMES[hash->nprime++]; |
| newitems = xzalloc(newsize * sizeof(newitems[0])); |
| |
| for (i = 0; i < hash->csize; i++) { |
| hi = hash->items[i]; |
| while (hi) { |
| thi = hi; |
| hi = thi->next; |
| idx = hashidx(thi->name) % newsize; |
| thi->next = newitems[idx]; |
| newitems[idx] = thi; |
| } |
| } |
| |
| free(hash->items); |
| hash->csize = newsize; |
| hash->items = newitems; |
| } |
| |
| /* find item in hash, add it if necessary. Return ptr to data */ |
| static void *hash_find(xhash *hash, const char *name) |
| { |
| hash_item *hi; |
| unsigned idx; |
| int l; |
| |
| hi = hash_search(hash, name); |
| if (!hi) { |
| if (++hash->nel / hash->csize > 10) |
| hash_rebuild(hash); |
| |
| l = strlen(name) + 1; |
| hi = xzalloc(sizeof(*hi) + l); |
| strcpy(hi->name, name); |
| |
| idx = hashidx(name) % hash->csize; |
| hi->next = hash->items[idx]; |
| hash->items[idx] = hi; |
| hash->glen += l; |
| } |
| return &hi->data; |
| } |
| |
| #define findvar(hash, name) ((var*) hash_find((hash), (name))) |
| #define newvar(name) ((var*) hash_find(vhash, (name))) |
| #define newfile(name) ((rstream*)hash_find(fdhash, (name))) |
| #define newfunc(name) ((func*) hash_find(fnhash, (name))) |
| |
| static void hash_remove(xhash *hash, const char *name) |
| { |
| hash_item *hi, **phi; |
| |
| phi = &hash->items[hashidx(name) % hash->csize]; |
| while (*phi) { |
| hi = *phi; |
| if (strcmp(hi->name, name) == 0) { |
| hash->glen -= (strlen(name) + 1); |
| hash->nel--; |
| *phi = hi->next; |
| free(hi); |
| break; |
| } |
| phi = &hi->next; |
| } |
| } |
| |
| /* ------ some useful functions ------ */ |
| |
| static char *skip_spaces(char *p) |
| { |
| while (1) { |
| if (*p == '\\' && p[1] == '\n') { |
| p++; |
| t_lineno++; |
| } else if (*p != ' ' && *p != '\t') { |
| break; |
| } |
| p++; |
| } |
| return p; |
| } |
| |
| /* returns old *s, advances *s past word and terminating NUL */ |
| static char *nextword(char **s) |
| { |
| char *p = *s; |
| while (*(*s)++ != '\0') |
| continue; |
| return p; |
| } |
| |
| static char nextchar(char **s) |
| { |
| char c, *pps; |
| |
| c = *(*s)++; |
| pps = *s; |
| if (c == '\\') |
| c = bb_process_escape_sequence((const char**)s); |
| /* Example awk statement: |
| * s = "abc\"def" |
| * we must treat \" as " |
| */ |
| if (c == '\\' && *s == pps) { /* unrecognized \z? */ |
| c = *(*s); /* yes, fetch z */ |
| if (c) |
| (*s)++; /* advance unless z = NUL */ |
| } |
| return c; |
| } |
| |
| /* TODO: merge with strcpy_and_process_escape_sequences()? |
| */ |
| static void unescape_string_in_place(char *s1) |
| { |
| char *s = s1; |
| while ((*s1 = nextchar(&s)) != '\0') |
| s1++; |
| } |
| |
| static ALWAYS_INLINE int isalnum_(int c) |
| { |
| return (isalnum(c) || c == '_'); |
| } |
| |
| static double my_strtod(char **pp) |
| { |
| char *cp = *pp; |
| if (ENABLE_DESKTOP && cp[0] == '0') { |
| /* Might be hex or octal integer: 0x123abc or 07777 */ |
| char c = (cp[1] | 0x20); |
| if (c == 'x' || isdigit(cp[1])) { |
| unsigned long long ull = strtoull(cp, pp, 0); |
| if (c == 'x') |
| return ull; |
| c = **pp; |
| if (!isdigit(c) && c != '.') |
| return ull; |
| /* else: it may be a floating number. Examples: |
| * 009.123 (*pp points to '9') |
| * 000.123 (*pp points to '.') |
| * fall through to strtod. |
| */ |
| } |
| } |
| return strtod(cp, pp); |
| } |
| |
| /* -------- working with variables (set/get/copy/etc) -------- */ |
| |
| static xhash *iamarray(var *v) |
| { |
| var *a = v; |
| |
| while (a->type & VF_CHILD) |
| a = a->x.parent; |
| |
| if (!(a->type & VF_ARRAY)) { |
| a->type |= VF_ARRAY; |
| a->x.array = hash_init(); |
| } |
| return a->x.array; |
| } |
| |
| static void clear_array(xhash *array) |
| { |
| unsigned i; |
| hash_item *hi, *thi; |
| |
| for (i = 0; i < array->csize; i++) { |
| hi = array->items[i]; |
| while (hi) { |
| thi = hi; |
| hi = hi->next; |
| free(thi->data.v.string); |
| free(thi); |
| } |
| array->items[i] = NULL; |
| } |
| array->glen = array->nel = 0; |
| } |
| |
| /* clear a variable */ |
| static var *clrvar(var *v) |
| { |
| if (!(v->type & VF_FSTR)) |
| free(v->string); |
| |
| v->type &= VF_DONTTOUCH; |
| v->type |= VF_DIRTY; |
| v->string = NULL; |
| return v; |
| } |
| |
| /* assign string value to variable */ |
| static var *setvar_p(var *v, char *value) |
| { |
| clrvar(v); |
| v->string = value; |
| handle_special(v); |
| return v; |
| } |
| |
| /* same as setvar_p but make a copy of string */ |
| static var *setvar_s(var *v, const char *value) |
| { |
| return setvar_p(v, (value && *value) ? xstrdup(value) : NULL); |
| } |
| |
| /* same as setvar_s but sets USER flag */ |
| static var *setvar_u(var *v, const char *value) |
| { |
| v = setvar_s(v, value); |
| v->type |= VF_USER; |
| return v; |
| } |
| |
| /* set array element to user string */ |
| static void setari_u(var *a, int idx, const char *s) |
| { |
| var *v; |
| |
| v = findvar(iamarray(a), itoa(idx)); |
| setvar_u(v, s); |
| } |
| |
| /* assign numeric value to variable */ |
| static var *setvar_i(var *v, double value) |
| { |
| clrvar(v); |
| v->type |= VF_NUMBER; |
| v->number = value; |
| handle_special(v); |
| return v; |
| } |
| |
| static const char *getvar_s(var *v) |
| { |
| /* if v is numeric and has no cached string, convert it to string */ |
| if ((v->type & (VF_NUMBER | VF_CACHED)) == VF_NUMBER) { |
| fmt_num(g_buf, MAXVARFMT, getvar_s(intvar[CONVFMT]), v->number, TRUE); |
| v->string = xstrdup(g_buf); |
| v->type |= VF_CACHED; |
| } |
| return (v->string == NULL) ? "" : v->string; |
| } |
| |
| static double getvar_i(var *v) |
| { |
| char *s; |
| |
| if ((v->type & (VF_NUMBER | VF_CACHED)) == 0) { |
| v->number = 0; |
| s = v->string; |
| if (s && *s) { |
| debug_printf_eval("getvar_i: '%s'->", s); |
| v->number = my_strtod(&s); |
| debug_printf_eval("%f (s:'%s')\n", v->number, s); |
| if (v->type & VF_USER) { |
| s = skip_spaces(s); |
| if (*s != '\0') |
| v->type &= ~VF_USER; |
| } |
| } else { |
| debug_printf_eval("getvar_i: '%s'->zero\n", s); |
| v->type &= ~VF_USER; |
| } |
| v->type |= VF_CACHED; |
| } |
| debug_printf_eval("getvar_i: %f\n", v->number); |
| return v->number; |
| } |
| |
| /* Used for operands of bitwise ops */ |
| static unsigned long getvar_i_int(var *v) |
| { |
| double d = getvar_i(v); |
| |
| /* Casting doubles to longs is undefined for values outside |
| * of target type range. Try to widen it as much as possible */ |
| if (d >= 0) |
| return (unsigned long)d; |
| /* Why? Think about d == -4294967295.0 (assuming 32bit longs) */ |
| return - (long) (unsigned long) (-d); |
| } |
| |
| static var *copyvar(var *dest, const var *src) |
| { |
| if (dest != src) { |
| clrvar(dest); |
| dest->type |= (src->type & ~(VF_DONTTOUCH | VF_FSTR)); |
| debug_printf_eval("copyvar: number:%f string:'%s'\n", src->number, src->string); |
| dest->number = src->number; |
| if (src->string) |
| dest->string = xstrdup(src->string); |
| } |
| handle_special(dest); |
| return dest; |
| } |
| |
| static var *incvar(var *v) |
| { |
| return setvar_i(v, getvar_i(v) + 1.0); |
| } |
| |
| /* return true if v is number or numeric string */ |
| static int is_numeric(var *v) |
| { |
| getvar_i(v); |
| return ((v->type ^ VF_DIRTY) & (VF_NUMBER | VF_USER | VF_DIRTY)); |
| } |
| |
| /* return 1 when value of v corresponds to true, 0 otherwise */ |
| static int istrue(var *v) |
| { |
| if (is_numeric(v)) |
| return (v->number != 0); |
| return (v->string && v->string[0]); |
| } |
| |
| /* temporary variables allocator. Last allocated should be first freed */ |
| static var *nvalloc(int n) |
| { |
| nvblock *pb = NULL; |
| var *v, *r; |
| int size; |
| |
| while (g_cb) { |
| pb = g_cb; |
| if ((g_cb->pos - g_cb->nv) + n <= g_cb->size) |
| break; |
| g_cb = g_cb->next; |
| } |
| |
| if (!g_cb) { |
| size = (n <= MINNVBLOCK) ? MINNVBLOCK : n; |
| g_cb = xzalloc(sizeof(nvblock) + size * sizeof(var)); |
| g_cb->size = size; |
| g_cb->pos = g_cb->nv; |
| g_cb->prev = pb; |
| /*g_cb->next = NULL; - xzalloc did it */ |
| if (pb) |
| pb->next = g_cb; |
| } |
| |
| v = r = g_cb->pos; |
| g_cb->pos += n; |
| |
| while (v < g_cb->pos) { |
| v->type = 0; |
| v->string = NULL; |
| v++; |
| } |
| |
| return r; |
| } |
| |
| static void nvfree(var *v) |
| { |
| var *p; |
| |
| if (v < g_cb->nv || v >= g_cb->pos) |
| syntax_error(EMSG_INTERNAL_ERROR); |
| |
| for (p = v; p < g_cb->pos; p++) { |
| if ((p->type & (VF_ARRAY | VF_CHILD)) == VF_ARRAY) { |
| clear_array(iamarray(p)); |
| free(p->x.array->items); |
| free(p->x.array); |
| } |
| if (p->type & VF_WALK) { |
| walker_list *n; |
| walker_list *w = p->x.walker; |
| debug_printf_walker("nvfree: freeing walker @%p\n", &p->x.walker); |
| p->x.walker = NULL; |
| while (w) { |
| n = w->prev; |
| debug_printf_walker(" free(%p)\n", w); |
| free(w); |
| w = n; |
| } |
| } |
| clrvar(p); |
| } |
| |
| g_cb->pos = v; |
| while (g_cb->prev && g_cb->pos == g_cb->nv) { |
| g_cb = g_cb->prev; |
| } |
| } |
| |
| /* ------- awk program text parsing ------- */ |
| |
| /* Parse next token pointed by global pos, place results into global ttt. |
| * If token isn't expected, give away. Return token class |
| */ |
| static uint32_t next_token(uint32_t expected) |
| { |
| #define concat_inserted (G.next_token__concat_inserted) |
| #define save_tclass (G.next_token__save_tclass) |
| #define save_info (G.next_token__save_info) |
| /* Initialized to TC_OPTERM: */ |
| #define ltclass (G.next_token__ltclass) |
| |
| char *p, *s; |
| const char *tl; |
| uint32_t tc; |
| const uint32_t *ti; |
| |
| if (t_rollback) { |
| t_rollback = FALSE; |
| } else if (concat_inserted) { |
| concat_inserted = FALSE; |
| t_tclass = save_tclass; |
| t_info = save_info; |
| } else { |
| p = g_pos; |
| readnext: |
| p = skip_spaces(p); |
| g_lineno = t_lineno; |
| if (*p == '#') |
| while (*p != '\n' && *p != '\0') |
| p++; |
| |
| if (*p == '\n') |
| t_lineno++; |
| |
| if (*p == '\0') { |
| tc = TC_EOF; |
| debug_printf_parse("%s: token found: TC_EOF\n", __func__); |
| } else if (*p == '\"') { |
| /* it's a string */ |
| t_string = s = ++p; |
| while (*p != '\"') { |
| char *pp; |
| if (*p == '\0' || *p == '\n') |
| syntax_error(EMSG_UNEXP_EOS); |
| pp = p; |
| *s++ = nextchar(&pp); |
| p = pp; |
| } |
| p++; |
| *s = '\0'; |
| tc = TC_STRING; |
| debug_printf_parse("%s: token found:'%s' TC_STRING\n", __func__, t_string); |
| } else if ((expected & TC_REGEXP) && *p == '/') { |
| /* it's regexp */ |
| t_string = s = ++p; |
| while (*p != '/') { |
| if (*p == '\0' || *p == '\n') |
| syntax_error(EMSG_UNEXP_EOS); |
| *s = *p++; |
| if (*s++ == '\\') { |
| char *pp = p; |
| s[-1] = bb_process_escape_sequence((const char **)&pp); |
| if (*p == '\\') |
| *s++ = '\\'; |
| if (pp == p) |
| *s++ = *p++; |
| else |
| p = pp; |
| } |
| } |
| p++; |
| *s = '\0'; |
| tc = TC_REGEXP; |
| debug_printf_parse("%s: token found:'%s' TC_REGEXP\n", __func__, t_string); |
| |
| } else if (*p == '.' || isdigit(*p)) { |
| /* it's a number */ |
| char *pp = p; |
| t_double = my_strtod(&pp); |
| p = pp; |
| if (*p == '.') |
| syntax_error(EMSG_UNEXP_TOKEN); |
| tc = TC_NUMBER; |
| debug_printf_parse("%s: token found:%f TC_NUMBER\n", __func__, t_double); |
| } else { |
| /* search for something known */ |
| tl = tokenlist; |
| tc = 0x00000001; |
| ti = tokeninfo; |
| while (*tl) { |
| int l = (unsigned char) *tl++; |
| if (l == (unsigned char) NTCC) { |
| tc <<= 1; |
| continue; |
| } |
| /* if token class is expected, |
| * token matches, |
| * and it's not a longer word, |
| */ |
| if ((tc & (expected | TC_WORD | TC_NEWLINE)) |
| && strncmp(p, tl, l) == 0 |
| && !((tc & TC_WORD) && isalnum_(p[l])) |
| ) { |
| /* then this is what we are looking for */ |
| t_info = *ti; |
| debug_printf_parse("%s: token found:'%.*s' t_info:%x\n", __func__, l, p, t_info); |
| p += l; |
| goto token_found; |
| } |
| ti++; |
| tl += l; |
| } |
| /* not a known token */ |
| |
| /* is it a name? (var/array/function) */ |
| if (!isalnum_(*p)) |
| syntax_error(EMSG_UNEXP_TOKEN); /* no */ |
| /* yes */ |
| t_string = --p; |
| while (isalnum_(*++p)) { |
| p[-1] = *p; |
| } |
| p[-1] = '\0'; |
| tc = TC_VARIABLE; |
| /* also consume whitespace between functionname and bracket */ |
| if (!(expected & TC_VARIABLE) || (expected & TC_ARRAY)) |
| p = skip_spaces(p); |
| if (*p == '(') { |
| tc = TC_FUNCTION; |
| debug_printf_parse("%s: token found:'%s' TC_FUNCTION\n", __func__, t_string); |
| } else { |
| if (*p == '[') { |
| p++; |
| tc = TC_ARRAY; |
| debug_printf_parse("%s: token found:'%s' TC_ARRAY\n", __func__, t_string); |
| } else |
| debug_printf_parse("%s: token found:'%s' TC_VARIABLE\n", __func__, t_string); |
| } |
| } |
| token_found: |
| g_pos = p; |
| |
| /* skipping newlines in some cases */ |
| if ((ltclass & TC_NOTERM) && (tc & TC_NEWLINE)) |
| goto readnext; |
| |
| /* insert concatenation operator when needed */ |
| if ((ltclass & TC_CONCAT1) && (tc & TC_CONCAT2) && (expected & TC_BINOP)) { |
| concat_inserted = TRUE; |
| save_tclass = tc; |
| save_info = t_info; |
| tc = TC_BINOP; |
| t_info = OC_CONCAT | SS | P(35); |
| } |
| |
| t_tclass = tc; |
| } |
| ltclass = t_tclass; |
| |
| /* Are we ready for this? */ |
| if (!(ltclass & expected)) { |
| syntax_error((ltclass & (TC_NEWLINE | TC_EOF)) ? |
| EMSG_UNEXP_EOS : EMSG_UNEXP_TOKEN); |
| } |
| |
| return ltclass; |
| #undef concat_inserted |
| #undef save_tclass |
| #undef save_info |
| #undef ltclass |
| } |
| |
| static void rollback_token(void) |
| { |
| t_rollback = TRUE; |
| } |
| |
| static node *new_node(uint32_t info) |
| { |
| node *n; |
| |
| n = xzalloc(sizeof(node)); |
| n->info = info; |
| n->lineno = g_lineno; |
| return n; |
| } |
| |
| static void mk_re_node(const char *s, node *n, regex_t *re) |
| { |
| n->info = OC_REGEXP; |
| n->l.re = re; |
| n->r.ire = re + 1; |
| xregcomp(re, s, REG_EXTENDED); |
| xregcomp(re + 1, s, REG_EXTENDED | REG_ICASE); |
| } |
| |
| static node *condition(void) |
| { |
| next_token(TC_SEQSTART); |
| return parse_expr(TC_SEQTERM); |
| } |
| |
| /* parse expression terminated by given argument, return ptr |
| * to built subtree. Terminator is eaten by parse_expr */ |
| static node *parse_expr(uint32_t iexp) |
| { |
| node sn; |
| node *cn = &sn; |
| node *vn, *glptr; |
| uint32_t tc, xtc; |
| var *v; |
| |
| debug_printf_parse("%s(%x)\n", __func__, iexp); |
| |
| sn.info = PRIMASK; |
| sn.r.n = sn.a.n = glptr = NULL; |
| xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP | iexp; |
| |
| while (!((tc = next_token(xtc)) & iexp)) { |
| |
| if (glptr && (t_info == (OC_COMPARE | VV | P(39) | 2))) { |
| /* input redirection (<) attached to glptr node */ |
| debug_printf_parse("%s: input redir\n", __func__); |
| cn = glptr->l.n = new_node(OC_CONCAT | SS | P(37)); |
| cn->a.n = glptr; |
| xtc = TC_OPERAND | TC_UOPPRE; |
| glptr = NULL; |
| |
| } else if (tc & (TC_BINOP | TC_UOPPOST)) { |
| debug_printf_parse("%s: TC_BINOP | TC_UOPPOST\n", __func__); |
| /* for binary and postfix-unary operators, jump back over |
| * previous operators with higher priority */ |
| vn = cn; |
| while (((t_info & PRIMASK) > (vn->a.n->info & PRIMASK2)) |
| || ((t_info == vn->info) && ((t_info & OPCLSMASK) == OC_COLON)) |
| ) { |
| vn = vn->a.n; |
| if (!vn->a.n) syntax_error(EMSG_UNEXP_TOKEN); |
| } |
| if ((t_info & OPCLSMASK) == OC_TERNARY) |
| t_info += P(6); |
| cn = vn->a.n->r.n = new_node(t_info); |
| cn->a.n = vn->a.n; |
| if (tc & TC_BINOP) { |
| cn->l.n = vn; |
| xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP; |
| if ((t_info & OPCLSMASK) == OC_PGETLINE) { |
| /* it's a pipe */ |
| next_token(TC_GETLINE); |
| /* give maximum priority to this pipe */ |
| cn->info &= ~PRIMASK; |
| xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp; |
| } |
| } else { |
| cn->r.n = vn; |
| xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp; |
| } |
| vn->a.n = cn; |
| |
| } else { |
| debug_printf_parse("%s: other\n", __func__); |
| /* for operands and prefix-unary operators, attach them |
| * to last node */ |
| vn = cn; |
| cn = vn->r.n = new_node(t_info); |
| cn->a.n = vn; |
| xtc = TC_OPERAND | TC_UOPPRE | TC_REGEXP; |
| if (tc & (TC_OPERAND | TC_REGEXP)) { |
| debug_printf_parse("%s: TC_OPERAND | TC_REGEXP\n", __func__); |
| xtc = TC_UOPPRE | TC_UOPPOST | TC_BINOP | TC_OPERAND | iexp; |
| /* one should be very careful with switch on tclass - |
| * only simple tclasses should be used! */ |
| switch (tc) { |
| case TC_VARIABLE: |
| case TC_ARRAY: |
| debug_printf_parse("%s: TC_VARIABLE | TC_ARRAY\n", __func__); |
| cn->info = OC_VAR; |
| v = hash_search(ahash, t_string); |
| if (v != NULL) { |
| cn->info = OC_FNARG; |
| cn->l.aidx = v->x.aidx; |
| } else { |
| cn->l.v = newvar(t_string); |
| } |
| if (tc & TC_ARRAY) { |
| cn->info |= xS; |
| cn->r.n = parse_expr(TC_ARRTERM); |
| } |
| break; |
| |
| case TC_NUMBER: |
| case TC_STRING: |
| debug_printf_parse("%s: TC_NUMBER | TC_STRING\n", __func__); |
| cn->info = OC_VAR; |
| v = cn->l.v = xzalloc(sizeof(var)); |
| if (tc & TC_NUMBER) |
| setvar_i(v, t_double); |
| else |
| setvar_s(v, t_string); |
| break; |
| |
| case TC_REGEXP: |
| debug_printf_parse("%s: TC_REGEXP\n", __func__); |
| mk_re_node(t_string, cn, xzalloc(sizeof(regex_t)*2)); |
| break; |
| |
| case TC_FUNCTION: |
| debug_printf_parse("%s: TC_FUNCTION\n", __func__); |
| cn->info = OC_FUNC; |
| cn->r.f = newfunc(t_string); |
| cn->l.n = condition(); |
| break; |
| |
| case TC_SEQSTART: |
| debug_printf_parse("%s: TC_SEQSTART\n", __func__); |
| cn = vn->r.n = parse_expr(TC_SEQTERM); |
| if (!cn) |
| syntax_error("Empty sequence"); |
| cn->a.n = vn; |
| break; |
| |
| case TC_GETLINE: |
| debug_printf_parse("%s: TC_GETLINE\n", __func__); |
| glptr = cn; |
| xtc = TC_OPERAND | TC_UOPPRE | TC_BINOP | iexp; |
| break; |
| |
| case TC_BUILTIN: |
| debug_printf_parse("%s: TC_BUILTIN\n", __func__); |
| cn->l.n = condition(); |
| break; |
| |
| case TC_LENGTH: |
| debug_printf_parse("%s: TC_LENGTH\n", __func__); |
| next_token(TC_SEQSTART | TC_OPTERM | TC_GRPTERM); |
| rollback_token(); |
| if (t_tclass & TC_SEQSTART) { |
| /* It was a "(" token. Handle just like TC_BUILTIN */ |
| cn->l.n = condition(); |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| debug_printf_parse("%s() returns %p\n", __func__, sn.r.n); |
| return sn.r.n; |
| } |
| |
| /* add node to chain. Return ptr to alloc'd node */ |
| static node *chain_node(uint32_t info) |
| { |
| node *n; |
| |
| if (!seq->first) |
| seq->first = seq->last = new_node(0); |
| |
| if (seq->programname != g_progname) { |
| seq->programname = g_progname; |
| n = chain_node(OC_NEWSOURCE); |
| n->l.new_progname = xstrdup(g_progname); |
| } |
| |
| n = seq->last; |
| n->info = info; |
| seq->last = n->a.n = new_node(OC_DONE); |
| |
| return n; |
| } |
| |
| static void chain_expr(uint32_t info) |
| { |
| node *n; |
| |
| n = chain_node(info); |
| |
| n->l.n = parse_expr(TC_OPTERM | TC_GRPTERM); |
| if ((info & OF_REQUIRED) && !n->l.n) |
| syntax_error(EMSG_TOO_FEW_ARGS); |
| |
| if (t_tclass & TC_GRPTERM) |
| rollback_token(); |
| } |
| |
| static node *chain_loop(node *nn) |
| { |
| node *n, *n2, *save_brk, *save_cont; |
| |
| save_brk = break_ptr; |
| save_cont = continue_ptr; |
| |
| n = chain_node(OC_BR | Vx); |
| continue_ptr = new_node(OC_EXEC); |
| break_ptr = new_node(OC_EXEC); |
| chain_group(); |
| n2 = chain_node(OC_EXEC | Vx); |
| n2->l.n = nn; |
| n2->a.n = n; |
| continue_ptr->a.n = n2; |
| break_ptr->a.n = n->r.n = seq->last; |
| |
| continue_ptr = save_cont; |
| break_ptr = save_brk; |
| |
| return n; |
| } |
| |
| /* parse group and attach it to chain */ |
| static void chain_group(void) |
| { |
| uint32_t c; |
| node *n, *n2, *n3; |
| |
| do { |
| c = next_token(TC_GRPSEQ); |
| } while (c & TC_NEWLINE); |
| |
| if (c & TC_GRPSTART) { |
| debug_printf_parse("%s: TC_GRPSTART\n", __func__); |
| while (next_token(TC_GRPSEQ | TC_GRPTERM) != TC_GRPTERM) { |
| debug_printf_parse("%s: !TC_GRPTERM\n", __func__); |
| if (t_tclass & TC_NEWLINE) |
| continue; |
| rollback_token(); |
| chain_group(); |
| } |
| debug_printf_parse("%s: TC_GRPTERM\n", __func__); |
| } else if (c & (TC_OPSEQ | TC_OPTERM)) { |
| debug_printf_parse("%s: TC_OPSEQ | TC_OPTERM\n", __func__); |
| rollback_token(); |
| chain_expr(OC_EXEC | Vx); |
| } else { |
| /* TC_STATEMNT */ |
| debug_printf_parse("%s: TC_STATEMNT(?)\n", __func__); |
| switch (t_info & OPCLSMASK) { |
| case ST_IF: |
| debug_printf_parse("%s: ST_IF\n", __func__); |
| n = chain_node(OC_BR | Vx); |
| n->l.n = condition(); |
| chain_group(); |
| n2 = chain_node(OC_EXEC); |
| n->r.n = seq->last; |
| if (next_token(TC_GRPSEQ | TC_GRPTERM | TC_ELSE) == TC_ELSE) { |
| chain_group(); |
| n2->a.n = seq->last; |
| } else { |
| rollback_token(); |
| } |
| break; |
| |
| case ST_WHILE: |
| debug_printf_parse("%s: ST_WHILE\n", __func__); |
| n2 = condition(); |
| n = chain_loop(NULL); |
| n->l.n = n2; |
| break; |
| |
| case ST_DO: |
| debug_printf_parse("%s: ST_DO\n", __func__); |
| n2 = chain_node(OC_EXEC); |
| n = chain_loop(NULL); |
| n2->a.n = n->a.n; |
| next_token(TC_WHILE); |
| n->l.n = condition(); |
| break; |
| |
| case ST_FOR: |
| debug_printf_parse("%s: ST_FOR\n", __func__); |
| next_token(TC_SEQSTART); |
| n2 = parse_expr(TC_SEMICOL | TC_SEQTERM); |
| if (t_tclass & TC_SEQTERM) { /* for-in */ |
| if (!n2 || (n2->info & OPCLSMASK) != OC_IN) |
| syntax_error(EMSG_UNEXP_TOKEN); |
| n = chain_node(OC_WALKINIT | VV); |
| n->l.n = n2->l.n; |
| n->r.n = n2->r.n; |
| n = chain_loop(NULL); |
| n->info = OC_WALKNEXT | Vx; |
| n->l.n = n2->l.n; |
| } else { /* for (;;) */ |
| n = chain_node(OC_EXEC | Vx); |
| n->l.n = n2; |
| n2 = parse_expr(TC_SEMICOL); |
| n3 = parse_expr(TC_SEQTERM); |
| n = chain_loop(n3); |
| n->l.n = n2; |
| if (!n2) |
| n->info = OC_EXEC; |
| } |
| break; |
| |
| case OC_PRINT: |
| case OC_PRINTF: |
| debug_printf_parse("%s: OC_PRINT[F]\n", __func__); |
| n = chain_node(t_info); |
| n->l.n = parse_expr(TC_OPTERM | TC_OUTRDR | TC_GRPTERM); |
| if (t_tclass & TC_OUTRDR) { |
| n->info |= t_info; |
| n->r.n = parse_expr(TC_OPTERM | TC_GRPTERM); |
| } |
| if (t_tclass & TC_GRPTERM) |
| rollback_token(); |
| break; |
| |
| case OC_BREAK: |
| debug_printf_parse("%s: OC_BREAK\n", __func__); |
| n = chain_node(OC_EXEC); |
| n->a.n = break_ptr; |
| chain_expr(t_info); |
| break; |
| |
| case OC_CONTINUE: |
| debug_printf_parse("%s: OC_CONTINUE\n", __func__); |
| n = chain_node(OC_EXEC); |
| n->a.n = continue_ptr; |
| chain_expr(t_info); |
| break; |
| |
| /* delete, next, nextfile, return, exit */ |
| default: |
| debug_printf_parse("%s: default\n", __func__); |
| chain_expr(t_info); |
| } |
| } |
| } |
| |
| static void parse_program(char *p) |
| { |
| uint32_t tclass; |
| node *cn; |
| func *f; |
| var *v; |
| |
| g_pos = p; |
| t_lineno = 1; |
| while ((tclass = next_token(TC_EOF | TC_OPSEQ | TC_GRPSTART | |
| TC_OPTERM | TC_BEGIN | TC_END | TC_FUNCDECL)) != TC_EOF) { |
| |
| if (tclass & TC_OPTERM) { |
| debug_printf_parse("%s: TC_OPTERM\n", __func__); |
| continue; |
| } |
| |
| seq = &mainseq; |
| if (tclass & TC_BEGIN) { |
| debug_printf_parse("%s: TC_BEGIN\n", __func__); |
| seq = &beginseq; |
| chain_group(); |
| } else if (tclass & TC_END) { |
| debug_printf_parse("%s: TC_END\n", __func__); |
| seq = &endseq; |
| chain_group(); |
| } else if (tclass & TC_FUNCDECL) { |
| debug_printf_parse("%s: TC_FUNCDECL\n", __func__); |
| next_token(TC_FUNCTION); |
| g_pos++; |
| f = newfunc(t_string); |
| f->body.first = NULL; |
| f->nargs = 0; |
| /* Match func arg list: a comma sep list of >= 0 args, and a close paren */ |
| while (next_token(TC_VARIABLE | TC_SEQTERM | TC_COMMA)) { |
| /* Either an empty arg list, or trailing comma from prev iter |
| * must be followed by an arg */ |
| if (f->nargs == 0 && t_tclass == TC_SEQTERM) |
| break; |
| |
| /* TC_SEQSTART/TC_COMMA must be followed by TC_VARIABLE */ |
| if (t_tclass != TC_VARIABLE) |
| syntax_error(EMSG_UNEXP_TOKEN); |
| |
| v = findvar(ahash, t_string); |
| v->x.aidx = f->nargs++; |
| |
| /* Arg followed either by end of arg list or 1 comma */ |
| if (next_token(TC_COMMA | TC_SEQTERM) & TC_SEQTERM) |
| break; |
| if (t_tclass != TC_COMMA) |
| syntax_error(EMSG_UNEXP_TOKEN); |
| } |
| seq = &f->body; |
| chain_group(); |
| clear_array(ahash); |
| } else if (tclass & TC_OPSEQ) { |
| debug_printf_parse("%s: TC_OPSEQ\n", __func__); |
| rollback_token(); |
| cn = chain_node(OC_TEST); |
| cn->l.n = parse_expr(TC_OPTERM | TC_EOF | TC_GRPSTART); |
| if (t_tclass & TC_GRPSTART) { |
| debug_printf_parse("%s: TC_GRPSTART\n", __func__); |
| rollback_token(); |
| chain_group(); |
| } else { |
| debug_printf_parse("%s: !TC_GRPSTART\n", __func__); |
| chain_node(OC_PRINT); |
| } |
| cn->r.n = mainseq.last; |
| } else /* if (tclass & TC_GRPSTART) */ { |
| debug_printf_parse("%s: TC_GRPSTART(?)\n", __func__); |
| rollback_token(); |
| chain_group(); |
| } |
| } |
| debug_printf_parse("%s: TC_EOF\n", __func__); |
| } |
| |
| |
| /* -------- program execution part -------- */ |
| |
| static node *mk_splitter(const char *s, tsplitter *spl) |
| { |
| regex_t *re, *ire; |
| node *n; |
| |
| re = &spl->re[0]; |
| ire = &spl->re[1]; |
| n = &spl->n; |
| if ((n->info & OPCLSMASK) == OC_REGEXP) { |
| regfree(re); |
| regfree(ire); // TODO: nuke ire, use re+1? |
| } |
| if (s[0] && s[1]) { /* strlen(s) > 1 */ |
| mk_re_node(s, n, re); |
| } else { |
| n->info = (uint32_t) s[0]; |
| } |
| |
| return n; |
| } |
| |
| /* use node as a regular expression. Supplied with node ptr and regex_t |
| * storage space. Return ptr to regex (if result points to preg, it should |
| * be later regfree'd manually |
| */ |
| static regex_t *as_regex(node *op, regex_t *preg) |
| { |
| int cflags; |
| var *v; |
| const char *s; |
| |
| if ((op->info & OPCLSMASK) == OC_REGEXP) { |
| return icase ? op->r.ire : op->l.re; |
| } |
| v = nvalloc(1); |
| s = getvar_s(evaluate(op, v)); |
| |
| cflags = icase ? REG_EXTENDED | REG_ICASE : REG_EXTENDED; |
| /* Testcase where REG_EXTENDED fails (unpaired '{'): |
| * echo Hi | awk 'gsub("@(samp|code|file)\{","");' |
| * gawk 3.1.5 eats this. We revert to ~REG_EXTENDED |
| * (maybe gsub is not supposed to use REG_EXTENDED?). |
| */ |
| if (regcomp(preg, s, cflags)) { |
| cflags &= ~REG_EXTENDED; |
| xregcomp(preg, s, cflags); |
| } |
| nvfree(v); |
| return preg; |
| } |
| |
| /* gradually increasing buffer. |
| * note that we reallocate even if n == old_size, |
| * and thus there is at least one extra allocated byte. |
| */ |
| static char* qrealloc(char *b, int n, int *size) |
| { |
| if (!b || n >= *size) { |
| *size = n + (n>>1) + 80; |
| b = xrealloc(b, *size); |
| } |
| return b; |
| } |
| |
| /* resize field storage space */ |
| static void fsrealloc(int size) |
| { |
| int i; |
| |
| if (size >= maxfields) { |
| i = maxfields; |
| maxfields = size + 16; |
| Fields = xrealloc(Fields, maxfields * sizeof(Fields[0])); |
| for (; i < maxfields; i++) { |
| Fields[i].type = VF_SPECIAL; |
| Fields[i].string = NULL; |
| } |
| } |
| /* if size < nfields, clear extra field variables */ |
| for (i = size; i < nfields; i++) { |
| clrvar(Fields + i); |
| } |
| nfields = size; |
| } |
| |
| static int awk_split(const char *s, node *spl, char **slist) |
| { |
| int l, n; |
| char c[4]; |
| char *s1; |
| regmatch_t pmatch[2]; // TODO: why [2]? [1] is enough... |
| |
| /* in worst case, each char would be a separate field */ |
| *slist = s1 = xzalloc(strlen(s) * 2 + 3); |
| strcpy(s1, s); |
| |
| c[0] = c[1] = (char)spl->info; |
| c[2] = c[3] = '\0'; |
| if (*getvar_s(intvar[RS]) == '\0') |
| c[2] = '\n'; |
| |
| n = 0; |
| if ((spl->info & OPCLSMASK) == OC_REGEXP) { /* regex split */ |
| if (!*s) |
| return n; /* "": zero fields */ |
| n++; /* at least one field will be there */ |
| do { |
| l = strcspn(s, c+2); /* len till next NUL or \n */ |
| if (regexec(icase ? spl->r.ire : spl->l.re, s, 1, pmatch, 0) == 0 |
| && pmatch[0].rm_so <= l |
| ) { |
| l = pmatch[0].rm_so; |
| if (pmatch[0].rm_eo == 0) { |
| l++; |
| pmatch[0].rm_eo++; |
| } |
| n++; /* we saw yet another delimiter */ |
| } else { |
| pmatch[0].rm_eo = l; |
| if (s[l]) |
| pmatch[0].rm_eo++; |
| } |
| memcpy(s1, s, l); |
| /* make sure we remove *all* of the separator chars */ |
| do { |
| s1[l] = '\0'; |
| } while (++l < pmatch[0].rm_eo); |
| nextword(&s1); |
| s += pmatch[0].rm_eo; |
| } while (*s); |
| return n; |
| } |
| if (c[0] == '\0') { /* null split */ |
| while (*s) { |
| *s1++ = *s++; |
| *s1++ = '\0'; |
| n++; |
| } |
| return n; |
| } |
| if (c[0] != ' ') { /* single-character split */ |
| if (icase) { |
| c[0] = toupper(c[0]); |
| c[1] = tolower(c[1]); |
| } |
| if (*s1) |
| n++; |
| while ((s1 = strpbrk(s1, c)) != NULL) { |
| *s1++ = '\0'; |
| n++; |
| } |
| return n; |
| } |
| /* space split */ |
| while (*s) { |
| s = skip_whitespace(s); |
| if (!*s) |
| break; |
| n++; |
| while (*s && !isspace(*s)) |
| *s1++ = *s++; |
| *s1++ = '\0'; |
| } |
| return n; |
| } |
| |
| static void split_f0(void) |
| { |
| /* static char *fstrings; */ |
| #define fstrings (G.split_f0__fstrings) |
| |
| int i, n; |
| char *s; |
| |
| if (is_f0_split) |
| return; |
| |
| is_f0_split = TRUE; |
| free(fstrings); |
| fsrealloc(0); |
| n = awk_split(getvar_s(intvar[F0]), &fsplitter.n, &fstrings); |
| fsrealloc(n); |
| s = fstrings; |
| for (i = 0; i < n; i++) { |
| Fields[i].string = nextword(&s); |
| Fields[i].type |= (VF_FSTR | VF_USER | VF_DIRTY); |
| } |
| |
| /* set NF manually to avoid side effects */ |
| clrvar(intvar[NF]); |
| intvar[NF]->type = VF_NUMBER | VF_SPECIAL; |
| intvar[NF]->number = nfields; |
| #undef fstrings |
| } |
| |
| /* perform additional actions when some internal variables changed */ |
| static void handle_special(var *v) |
| { |
| int n; |
| char *b; |
| const char *sep, *s; |
| int sl, l, len, i, bsize; |
| |
| if (!(v->type & VF_SPECIAL)) |
| return; |
| |
| if (v == intvar[NF]) { |
| n = (int)getvar_i(v); |
| if (n < 0) |
| syntax_error("NF set to negative value"); |
| fsrealloc(n); |
| |
| /* recalculate $0 */ |
| sep = getvar_s(intvar[OFS]); |
| sl = strlen(sep); |
| b = NULL; |
| len = 0; |
| for (i = 0; i < n; i++) { |
| s = getvar_s(&Fields[i]); |
| l = strlen(s); |
| if (b) { |
| memcpy(b+len, sep, sl); |
| len += sl; |
| } |
| b = qrealloc(b, len+l+sl, &bsize); |
| memcpy(b+len, s, l); |
| len += l; |
| } |
| if (b) |
| b[len] = '\0'; |
| setvar_p(intvar[F0], b); |
| is_f0_split = TRUE; |
| |
| } else if (v == intvar[F0]) { |
| is_f0_split = FALSE; |
| |
| } else if (v == intvar[FS]) { |
| /* |
| * The POSIX-2008 standard says that changing FS should have no effect on the |
| * current input line, but only on the next one. The language is: |
| * |
| * > Before the first reference to a field in the record is evaluated, the record |
| * > shall be split into fields, according to the rules in Regular Expressions, |
| * > using the value of FS that was current at the time the record was read. |
| * |
| * So, split up current line before assignment to FS: |
| */ |
| split_f0(); |
| |
| mk_splitter(getvar_s(v), &fsplitter); |
| } else if (v == intvar[RS]) { |
| mk_splitter(getvar_s(v), &rsplitter); |
| } else if (v == intvar[IGNORECASE]) { |
| icase = istrue(v); |
| } else { /* $n */ |
| n = getvar_i(intvar[NF]); |
| setvar_i(intvar[NF], n > v-Fields ? n : v-Fields+1); |
| /* right here v is invalid. Just to note... */ |
| } |
| } |
| |
| /* step through func/builtin/etc arguments */ |
| static node *nextarg(node **pn) |
| { |
| node *n; |
| |
| n = *pn; |
| if (n && (n->info & OPCLSMASK) == OC_COMMA) { |
| *pn = n->r.n; |
| n = n->l.n; |
| } else { |
| *pn = NULL; |
| } |
| return n; |
| } |
| |
| static void hashwalk_init(var *v, xhash *array) |
| { |
| hash_item *hi; |
| unsigned i; |
| walker_list *w; |
| walker_list *prev_walker; |
| |
| if (v->type & VF_WALK) { |
| prev_walker = v->x.walker; |
| } else { |
| v->type |= VF_WALK; |
| prev_walker = NULL; |
| } |
| debug_printf_walker("hashwalk_init: prev_walker:%p\n", prev_walker); |
| |
| w = v->x.walker = xzalloc(sizeof(*w) + array->glen + 1); /* why + 1? */ |
| debug_printf_walker(" walker@%p=%p\n", &v->x.walker, w); |
| w->cur = w->end = w->wbuf; |
| w->prev = prev_walker; |
| for (i = 0; i < array->csize; i++) { |
| hi = array->items[i]; |
| while (hi) { |
| strcpy(w->end, hi->name); |
| nextword(&w->end); |
| hi = hi->next; |
| } |
| } |
| } |
| |
| static int hashwalk_next(var *v) |
| { |
| walker_list *w = v->x.walker; |
| |
| if (w->cur >= w->end) { |
| walker_list *prev_walker = w->prev; |
| |
| debug_printf_walker("end of iteration, free(walker@%p:%p), prev_walker:%p\n", &v->x.walker, w, prev_walker); |
| free(w); |
| v->x.walker = prev_walker; |
| return FALSE; |
| } |
| |
| setvar_s(v, nextword(&w->cur)); |
| return TRUE; |
| } |
| |
| /* evaluate node, return 1 when result is true, 0 otherwise */ |
| static int ptest(node *pattern) |
| { |
| /* ptest__v is "static": to save stack space? */ |
| return istrue(evaluate(pattern, &G.ptest__v)); |
| } |
| |
| /* read next record from stream rsm into a variable v */ |
| static int awk_getline(rstream *rsm, var *v) |
| { |
| char *b; |
| regmatch_t pmatch[2]; |
| int size, a, p, pp = 0; |
| int fd, so, eo, r, rp; |
| char c, *m, *s; |
| |
| debug_printf_eval("entered %s()\n", __func__); |
| |
| /* we're using our own buffer since we need access to accumulating |
| * characters |
| */ |
| fd = fileno(rsm->F); |
| m = rsm->buffer; |
| a = rsm->adv; |
| p = rsm->pos; |
| size = rsm->size; |
| c = (char) rsplitter.n.info; |
| rp = 0; |
| |
| if (!m) |
| m = qrealloc(m, 256, &size); |
| |
| do { |
| b = m + a; |
| so = eo = p; |
| r = 1; |
| if (p > 0) { |
| if ((rsplitter.n.info & OPCLSMASK) == OC_REGEXP) { |
| if (regexec(icase ? rsplitter.n.r.ire : rsplitter.n.l.re, |
| b, 1, pmatch, 0) == 0) { |
| so = pmatch[0].rm_so; |
| eo = pmatch[0].rm_eo; |
| if (b[eo] != '\0') |
| break; |
| } |
| } else if (c != '\0') { |
| s = strchr(b+pp, c); |
| if (!s) |
| s = memchr(b+pp, '\0', p - pp); |
| if (s) { |
| so = eo = s-b; |
| eo++; |
| break; |
| } |
| } else { |
| while (b[rp] == '\n') |
| rp++; |
| s = strstr(b+rp, "\n\n"); |
| if (s) { |
| so = eo = s-b; |
| while (b[eo] == '\n') |
| eo++; |
| if (b[eo] != '\0') |
| break; |
| } |
| } |
| } |
| |
| if (a > 0) { |
| memmove(m, m+a, p+1); |
| b = m; |
| a = 0; |
| } |
| |
| m = qrealloc(m, a+p+128, &size); |
| b = m + a; |
| pp = p; |
| p += safe_read(fd, b+p, size-p-1); |
| if (p < pp) { |
| p = 0; |
| r = 0; |
| setvar_i(intvar[ERRNO], errno); |
| } |
| b[p] = '\0'; |
| |
| } while (p > pp); |
| |
| if (p == 0) { |
| r--; |
| } else { |
| c = b[so]; b[so] = '\0'; |
| setvar_s(v, b+rp); |
| v->type |= VF_USER; |
| b[so] = c; |
| c = b[eo]; b[eo] = '\0'; |
| setvar_s(intvar[RT], b+so); |
| b[eo] = c; |
| } |
| |
| rsm->buffer = m; |
| rsm->adv = a + eo; |
| rsm->pos = p - eo; |
| rsm->size = size; |
| |
| debug_printf_eval("returning from %s(): %d\n", __func__, r); |
| |
| return r; |
| } |
| |
| static int fmt_num(char *b, int size, const char *format, double n, int int_as_int) |
| { |
| int r = 0; |
| char c; |
| const char *s = format; |
| |
| if (int_as_int && n == (long long)n) { |
| r = snprintf(b, size, "%lld", (long long)n); |
| } else { |
| do { c = *s; } while (c && *++s); |
| if (strchr("diouxX", c)) { |
| r = snprintf(b, size, format, (int)n); |
| } else if (strchr("eEfgG", c)) { |
| r = snprintf(b, size, format, n); |
| } else { |
| syntax_error(EMSG_INV_FMT); |
| } |
| } |
| return r; |
| } |
| |
| /* formatted output into an allocated buffer, return ptr to buffer */ |
| static char *awk_printf(node *n) |
| { |
| char *b = NULL; |
| char *fmt, *s, *f; |
| const char *s1; |
| int i, j, incr, bsize; |
| char c, c1; |
| var *v, *arg; |
| |
| v = nvalloc(1); |
| fmt = f = xstrdup(getvar_s(evaluate(nextarg(&n), v))); |
| |
| i = 0; |
| while (*f) { |
| s = f; |
| while (*f && (*f != '%' || *++f == '%')) |
| f++; |
| while (*f && !isalpha(*f)) { |
| if (*f == '*') |
| syntax_error("%*x formats are not supported"); |
| f++; |
| } |
| |
| incr = (f - s) + MAXVARFMT; |
| b = qrealloc(b, incr + i, &bsize); |
| c = *f; |
| if (c != '\0') |
| f++; |
| c1 = *f; |
| *f = '\0'; |
| arg = evaluate(nextarg(&n), v); |
| |
| j = i; |
| if (c == 'c' || !c) { |
| i += sprintf(b+i, s, is_numeric(arg) ? |
| (char)getvar_i(arg) : *getvar_s(arg)); |
| } else if (c == 's') { |
| s1 = getvar_s(arg); |
| b = qrealloc(b, incr+i+strlen(s1), &bsize); |
| i += sprintf(b+i, s, s1); |
| } else { |
| i += fmt_num(b+i, incr, s, getvar_i(arg), FALSE); |
| } |
| *f = c1; |
| |
| /* if there was an error while sprintf, return value is negative */ |
| if (i < j) |
| i = j; |
| } |
| |
| free(fmt); |
| nvfree(v); |
| b = xrealloc(b, i + 1); |
| b[i] = '\0'; |
| return b; |
| } |
| |
| /* Common substitution routine. |
| * Replace (nm)'th substring of (src) that matches (rn) with (repl), |
| * store result into (dest), return number of substitutions. |
| * If nm = 0, replace all matches. |
| * If src or dst is NULL, use $0. |
| * If subexp != 0, enable subexpression matching (\1-\9). |
| */ |
| static int awk_sub(node *rn, const char *repl, int nm, var *src, var *dest, int subexp) |
| { |
| char *resbuf; |
| const char *sp; |
| int match_no, residx, replen, resbufsize; |
| int regexec_flags; |
| regmatch_t pmatch[10]; |
| regex_t sreg, *regex; |
| |
| resbuf = NULL; |
| residx = 0; |
| match_no = 0; |
| regexec_flags = 0; |
| regex = as_regex(rn, &sreg); |
| sp = getvar_s(src ? src : intvar[F0]); |
| replen = strlen(repl); |
| while (regexec(regex, sp, 10, pmatch, regexec_flags) == 0) { |
| int so = pmatch[0].rm_so; |
| int eo = pmatch[0].rm_eo; |
| |
| //bb_error_msg("match %u: [%u,%u] '%s'%p", match_no+1, so, eo, sp,sp); |
| resbuf = qrealloc(resbuf, residx + eo + replen, &resbufsize); |
| memcpy(resbuf + residx, sp, eo); |
| residx += eo; |
| if (++match_no >= nm) { |
| const char *s; |
| int nbs; |
| |
| /* replace */ |
| residx -= (eo - so); |
| nbs = 0; |
| for (s = repl; *s; s++) { |
| char c = resbuf[residx++] = *s; |
| if (c == '\\') { |
| nbs++; |
| continue; |
| } |
| if (c == '&' || (subexp && c >= '0' && c <= '9')) { |
| int j; |
| residx -= ((nbs + 3) >> 1); |
| j = 0; |
| if (c != '&') { |
| j = c - '0'; |
| nbs++; |
| } |
| if (nbs % 2) { |
| resbuf[residx++] = c; |
| } else { |
| int n = pmatch[j].rm_eo - pmatch[j].rm_so; |
| resbuf = qrealloc(resbuf, residx + replen + n, &resbufsize); |
| memcpy(resbuf + residx, sp + pmatch[j].rm_so, n); |
| residx += n; |
| } |
| } |
| nbs = 0; |
| } |
| } |
| |
| regexec_flags = REG_NOTBOL; |
| sp += eo; |
| if (match_no == nm) |
| break; |
| if (eo == so) { |
| /* Empty match (e.g. "b*" will match anywhere). |
| * Advance by one char. */ |
| //BUG (bug 1333): |
| //gsub(/\<b*/,"") on "abc" will reach this point, advance to "bc" |
| //... and will erroneously match "b" even though it is NOT at the word start. |
| //we need REG_NOTBOW but it does not exist... |
| //TODO: if EXTRA_COMPAT=y, use GNU matching and re_search, |
| //it should be able to do it correctly. |
| /* Subtle: this is safe only because |
| * qrealloc allocated at least one extra byte */ |
| resbuf[residx] = *sp; |
| if (*sp == '\0') |
| goto ret; |
| sp++; |
| residx++; |
| } |
| } |
| |
| resbuf = qrealloc(resbuf, residx + strlen(sp), &resbufsize); |
| strcpy(resbuf + residx, sp); |
| ret: |
| //bb_error_msg("end sp:'%s'%p", sp,sp); |
| setvar_p(dest ? dest : intvar[F0], resbuf); |
| if (regex == &sreg) |
| regfree(regex); |
| return match_no; |
| } |
| |
| static NOINLINE int do_mktime(const char *ds) |
| { |
| struct tm then; |
| int count; |
| |
| /*memset(&then, 0, sizeof(then)); - not needed */ |
| then.tm_isdst = -1; /* default is unknown */ |
| |
| /* manpage of mktime says these fields are ints, |
| * so we can sscanf stuff directly into them */ |
| count = sscanf(ds, "%u %u %u %u %u %u %d", |
| &then.tm_year, &then.tm_mon, &then.tm_mday, |
| &then.tm_hour, &then.tm_min, &then.tm_sec, |
| &then.tm_isdst); |
| |
| if (count < 6 |
| || (unsigned)then.tm_mon < 1 |
| || (unsigned)then.tm_year < 1900 |
| ) { |
| return -1; |
| } |
| |
| then.tm_mon -= 1; |
| then.tm_year -= 1900; |
| |
| return mktime(&then); |
| } |
| |
| static NOINLINE var *exec_builtin(node *op, var *res) |
| { |
| #define tspl (G.exec_builtin__tspl) |
| |
| var *tv; |
| node *an[4]; |
| var *av[4]; |
| const char *as[4]; |
| regmatch_t pmatch[2]; |
| regex_t sreg, *re; |
| node *spl; |
| uint32_t isr, info; |
| int nargs; |
| time_t tt; |
| int i, l, ll, n; |
| |
| tv = nvalloc(4); |
| isr = info = op->info; |
| op = op->l.n; |
| |
| av[2] = av[3] = NULL; |
| for (i = 0; i < 4 && op; i++) { |
| an[i] = nextarg(&op); |
| if (isr & 0x09000000) |
| av[i] = evaluate(an[i], &tv[i]); |
| if (isr & 0x08000000) |
| as[i] = getvar_s(av[i]); |
| isr >>= 1; |
| } |
| |
| nargs = i; |
| if ((uint32_t)nargs < (info >> 30)) |
| syntax_error(EMSG_TOO_FEW_ARGS); |
| |
| info &= OPNMASK; |
| switch (info) { |
| |
| case B_a2: |
| if (ENABLE_FEATURE_AWK_LIBM) |
| setvar_i(res, atan2(getvar_i(av[0]), getvar_i(av[1]))); |
| else |
| syntax_error(EMSG_NO_MATH); |
| break; |
| |
| case B_sp: { |
| char *s, *s1; |
| |
| if (nargs > 2) { |
| spl = (an[2]->info & OPCLSMASK) == OC_REGEXP ? |
| an[2] : mk_splitter(getvar_s(evaluate(an[2], &tv[2])), &tspl); |
| } else { |
| spl = &fsplitter.n; |
| } |
| |
| n = awk_split(as[0], spl, &s); |
| s1 = s; |
| clear_array(iamarray(av[1])); |
| for (i = 1; i <= n; i++) |
| setari_u(av[1], i, nextword(&s)); |
| free(s1); |
| setvar_i(res, n); |
| break; |
| } |
| |
| case B_ss: { |
| char *s; |
| |
| l = strlen(as[0]); |
| i = getvar_i(av[1]) - 1; |
| if (i > l) |
| i = l; |
| if (i < 0) |
| i = 0; |
| n = (nargs > 2) ? getvar_i(av[2]) : l-i; |
| if (n < 0) |
| n = 0; |
| s = xstrndup(as[0]+i, n); |
| setvar_p(res, s); |
| break; |
| } |
| |
| /* Bitwise ops must assume that operands are unsigned. GNU Awk 3.1.5: |
| * awk '{ print or(-1,1) }' gives "4.29497e+09", not "-2.xxxe+09" */ |
| case B_an: |
| setvar_i(res, getvar_i_int(av[0]) & getvar_i_int(av[1])); |
| break; |
| |
| case B_co: |
| setvar_i(res, ~getvar_i_int(av[0])); |
| break; |
| |
| case B_ls: |
| setvar_i(res, getvar_i_int(av[0]) << getvar_i_int(av[1])); |
| break; |
| |
| case B_or: |
| setvar_i(res, getvar_i_int(av[0]) | getvar_i_int(av[1])); |
| break; |
| |
| case B_rs: |
| setvar_i(res, getvar_i_int(av[0]) >> getvar_i_int(av[1])); |
| break; |
| |
| case B_xo: |
| setvar_i(res, getvar_i_int(av[0]) ^ getvar_i_int(av[1])); |
| break; |
| |
| case B_lo: |
| case B_up: { |
| char *s, *s1; |
| s1 = s = xstrdup(as[0]); |
| while (*s1) { |
| //*s1 = (info == B_up) ? toupper(*s1) : tolower(*s1); |
| if ((unsigned char)((*s1 | 0x20) - 'a') <= ('z' - 'a')) |
| *s1 = (info == B_up) ? (*s1 & 0xdf) : (*s1 | 0x20); |
| s1++; |
| } |
| setvar_p(res, s); |
| break; |
| } |
| |
| case B_ix: |
| n = 0; |
| ll = strlen(as[1]); |
| l = strlen(as[0]) - ll; |
| if (ll > 0 && l >= 0) { |
| if (!icase) { |
| char *s = strstr(as[0], as[1]); |
| if (s) |
| n = (s - as[0]) + 1; |
| } else { |
| /* this piece of code is terribly slow and |
| * really should be rewritten |
| */ |
| for (i = 0; i <= l; i++) { |
| if (strncasecmp(as[0]+i, as[1], ll) == 0) { |
| n = i+1; |
| break; |
| } |
| } |
| } |
| } |
| setvar_i(res, n); |
| break; |
| |
| case B_ti: |
| if (nargs > 1) |
| tt = getvar_i(av[1]); |
| else |
| time(&tt); |
| //s = (nargs > 0) ? as[0] : "%a %b %d %H:%M:%S %Z %Y"; |
| i = strftime(g_buf, MAXVARFMT, |
| ((nargs > 0) ? as[0] : "%a %b %d %H:%M:%S %Z %Y"), |
| localtime(&tt)); |
| g_buf[i] = '\0'; |
| setvar_s(res, g_buf); |
| break; |
| |
| case B_mt: |
| setvar_i(res, do_mktime(as[0])); |
| break; |
| |
| case B_ma: |
| re = as_regex(an[1], &sreg); |
| n = regexec(re, as[0], 1, pmatch, 0); |
| if (n == 0) { |
| pmatch[0].rm_so++; |
| pmatch[0].rm_eo++; |
| } else { |
| pmatch[0].rm_so = 0; |
| pmatch[0].rm_eo = -1; |
| } |
| setvar_i(newvar("RSTART"), pmatch[0].rm_so); |
| setvar_i(newvar("RLENGTH"), pmatch[0].rm_eo - pmatch[0].rm_so); |
| setvar_i(res, pmatch[0].rm_so); |
| if (re == &sreg) |
| regfree(re); |
| break; |
| |
| case B_ge: |
| awk_sub(an[0], as[1], getvar_i(av[2]), av[3], res, TRUE); |
| break; |
| |
| case B_gs: |
| setvar_i(res, awk_sub(an[0], as[1], 0, av[2], av[2], FALSE)); |
| break; |
| |
| case B_su: |
| setvar_i(res, awk_sub(an[0], as[1], 1, av[2], av[2], FALSE)); |
| break; |
| } |
| |
| nvfree(tv); |
| return res; |
| #undef tspl |
| } |
| |
| /* |
| * Evaluate node - the heart of the program. Supplied with subtree |
| * and place where to store result. returns ptr to result. |
| */ |
| #define XC(n) ((n) >> 8) |
| |
| static var *evaluate(node *op, var *res) |
| { |
| /* This procedure is recursive so we should count every byte */ |
| #define fnargs (G.evaluate__fnargs) |
| /* seed is initialized to 1 */ |
| #define seed (G.evaluate__seed) |
| #define sreg (G.evaluate__sreg) |
| |
| var *v1; |
| |
| if (!op) |
| return setvar_s(res, NULL); |
| |
| debug_printf_eval("entered %s()\n", __func__); |
| |
| v1 = nvalloc(2); |
| |
| while (op) { |
| struct { |
| var *v; |
| const char *s; |
| } L = L; /* for compiler */ |
| struct { |
| var *v; |
| const char *s; |
| } R = R; |
| double L_d = L_d; |
| uint32_t opinfo; |
| int opn; |
| node *op1; |
| |
| opinfo = op->info; |
| opn = (opinfo & OPNMASK); |
| g_lineno = op->lineno; |
| op1 = op->l.n; |
| debug_printf_eval("opinfo:%08x opn:%08x\n", opinfo, opn); |
| |
| /* "delete" is special: |
| * "delete array[var--]" must evaluate index expr only once, |
| * must not evaluate it in "execute inevitable things" part. |
| */ |
| if (XC(opinfo & OPCLSMASK) == XC(OC_DELETE)) { |
| uint32_t info = op1->info & OPCLSMASK; |
| var *v; |
| |
| debug_printf_eval("DELETE\n"); |
| if (info == OC_VAR) { |
| v = op1->l.v; |
| } else if (info == OC_FNARG) { |
| v = &fnargs[op1->l.aidx]; |
| } else { |
| syntax_error(EMSG_NOT_ARRAY); |
| } |
| if (op1->r.n) { /* array ref? */ |
| const char *s; |
| s = getvar_s(evaluate(op1->r.n, v1)); |
| hash_remove(iamarray(v), s); |
| } else { |
| clear_array(iamarray(v)); |
| } |
| goto next; |
| } |
| |
| /* execute inevitable things */ |
| if (opinfo & OF_RES1) |
| L.v = evaluate(op1, v1); |
| if (opinfo & OF_RES2) |
| R.v = evaluate(op->r.n, v1+1); |
| if (opinfo & OF_STR1) { |
| L.s = getvar_s(L.v); |
| debug_printf_eval("L.s:'%s'\n", L.s); |
| } |
| if (opinfo & OF_STR2) { |
| R.s = getvar_s(R.v); |
| debug_printf_eval("R.s:'%s'\n", R.s); |
| } |
| if (opinfo & OF_NUM1) { |
| L_d = getvar_i(L.v); |
| debug_printf_eval("L_d:%f\n", L_d); |
| } |
| |
| debug_printf_eval("switch(0x%x)\n", XC(opinfo & OPCLSMASK)); |
| switch (XC(opinfo & OPCLSMASK)) { |
| |
| /* -- iterative node type -- */ |
| |
| /* test pattern */ |
| case XC( OC_TEST ): |
| if ((op1->info & OPCLSMASK) == OC_COMMA) { |
| /* it's range pattern */ |
| if ((opinfo & OF_CHECKED) || ptest(op1->l.n)) { |
| op->info |= OF_CHECKED; |
| if (ptest(op1->r.n)) |
| op->info &= ~OF_CHECKED; |
| op = op->a.n; |
| } else { |
| op = op->r.n; |
| } |
| } else { |
| op = ptest(op1) ? op->a.n : op->r.n; |
| } |
| break; |
| |
| /* just evaluate an expression, also used as unconditional jump */ |
| case XC( OC_EXEC ): |
| break; |
| |
| /* branch, used in if-else and various loops */ |
| case XC( OC_BR ): |
| op = istrue(L.v) ? op->a.n : op->r.n; |
| break; |
| |
| /* initialize for-in loop */ |
| case XC( OC_WALKINIT ): |
| hashwalk_init(L.v, iamarray(R.v)); |
| break; |
| |
| /* get next array item */ |
| case XC( OC_WALKNEXT ): |
| op = hashwalk_next(L.v) ? op->a.n : op->r.n; |
| break; |
| |
| case XC( OC_PRINT ): |
| case XC( OC_PRINTF ): { |
| FILE *F = stdout; |
| |
| if (op->r.n) { |
| rstream *rsm = newfile(R.s); |
| if (!rsm->F) { |
| if (opn == '|') { |
| rsm->F = popen(R.s, "w"); |
| if (rsm->F == NULL) |
| bb_simple_perror_msg_and_die("popen"); |
| rsm->is_pipe = 1; |
| } else { |
| rsm->F = xfopen(R.s, opn=='w' ? "w" : "a"); |
| } |
| } |
| F = rsm->F; |
| } |
| |
| if ((opinfo & OPCLSMASK) == OC_PRINT) { |
| if (!op1) { |
| fputs(getvar_s(intvar[F0]), F); |
| } else { |
| while (op1) { |
| var *v = evaluate(nextarg(&op1), v1); |
| if (v->type & VF_NUMBER) { |
| fmt_num(g_buf, MAXVARFMT, getvar_s(intvar[OFMT]), |
| getvar_i(v), TRUE); |
| fputs(g_buf, F); |
| } else { |
| fputs(getvar_s(v), F); |
| } |
| |
| if (op1) |
| fputs(getvar_s(intvar[OFS]), F); |
| } |
| } |
| fputs(getvar_s(intvar[ORS]), F); |
| |
| } else { /* OC_PRINTF */ |
| char *s = awk_printf(op1); |
| fputs(s, F); |
| free(s); |
| } |
| fflush(F); |
| break; |
| } |
| |
| /* case XC( OC_DELETE ): - moved to happen before arg evaluation */ |
| |
| case XC( OC_NEWSOURCE ): |
| g_progname = op->l.new_progname; |
| break; |
| |
| case XC( OC_RETURN ): |
| copyvar(res, L.v); |
| break; |
| |
| case XC( OC_NEXTFILE ): |
| nextfile = TRUE; |
| case XC( OC_NEXT ): |
| nextrec = TRUE; |
| case XC( OC_DONE ): |
| clrvar(res); |
| break; |
| |
| case XC( OC_EXIT ): |
| awk_exit(L_d); |
| |
| /* -- recursive node type -- */ |
| |
| case XC( OC_VAR ): |
| debug_printf_eval("VAR\n"); |
| L.v = op->l.v; |
| if (L.v == intvar[NF]) |
| split_f0(); |
| goto v_cont; |
| |
| case XC( OC_FNARG ): |
| debug_printf_eval("FNARG[%d]\n", op->l.aidx); |
| L.v = &fnargs[op->l.aidx]; |
| v_cont: |
| res = op->r.n ? findvar(iamarray(L.v), R.s) : L.v; |
| break; |
| |
| case XC( OC_IN ): |
| setvar_i(res, hash_search(iamarray(R.v), L.s) ? 1 : 0); |
| break; |
| |
| case XC( OC_REGEXP ): |
| op1 = op; |
| L.s = getvar_s(intvar[F0]); |
| goto re_cont; |
| |
| case XC( OC_MATCH ): |
| op1 = op->r.n; |
| re_cont: |
| { |
| regex_t *re = as_regex(op1, &sreg); |
| int i = regexec(re, L.s, 0, NULL, 0); |
| if (re == &sreg) |
| regfree(re); |
| setvar_i(res, (i == 0) ^ (opn == '!')); |
| } |
| break; |
| |
| case XC( OC_MOVE ): |
| debug_printf_eval("MOVE\n"); |
| /* if source is a temporary string, jusk relink it to dest */ |
| //Disabled: if R.v is numeric but happens to have cached R.v->string, |
| //then L.v ends up being a string, which is wrong |
| // if (R.v == v1+1 && R.v->string) { |
| // res = setvar_p(L.v, R.v->string); |
| // R.v->string = NULL; |
| // } else { |
| res = copyvar(L.v, R.v); |
| // } |
| break; |
| |
| case XC( OC_TERNARY ): |
| if ((op->r.n->info & OPCLSMASK) != OC_COLON) |
| syntax_error(EMSG_POSSIBLE_ERROR); |
| res = evaluate(istrue(L.v) ? op->r.n->l.n : op->r.n->r.n, res); |
| break; |
| |
| case XC( OC_FUNC ): { |
| var *vbeg, *v; |
| const char *sv_progname; |
| |
| /* The body might be empty, still has to eval the args */ |
| if (!op->r.n->info && !op->r.f->body.first) |
| syntax_error(EMSG_UNDEF_FUNC); |
| |
| vbeg = v = nvalloc(op->r.f->nargs + 1); |
| while (op1) { |
| var *arg = evaluate(nextarg(&op1), v1); |
| copyvar(v, arg); |
| v->type |= VF_CHILD; |
| v->x.parent = arg; |
| if (++v - vbeg >= op->r.f->nargs) |
| break; |
| } |
| |
| v = fnargs; |
| fnargs = vbeg; |
| sv_progname = g_progname; |
| |
| res = evaluate(op->r.f->body.first, res); |
| |
| g_progname = sv_progname; |
| nvfree(fnargs); |
| fnargs = v; |
| |
| break; |
| } |
| |
| case XC( OC_GETLINE ): |
| case XC( OC_PGETLINE ): { |
| rstream *rsm; |
| int i; |
| |
| if (op1) { |
| rsm = newfile(L.s); |
| if (!rsm->F) { |
| if ((opinfo & OPCLSMASK) == OC_PGETLINE) { |
| rsm->F = popen(L.s, "r"); |
| rsm->is_pipe = TRUE; |
| } else { |
| rsm->F = fopen_for_read(L.s); /* not xfopen! */ |
| } |
| } |
| } else { |
| if (!iF) |
| iF = next_input_file(); |
| rsm = iF; |
| } |
| |
| if (!rsm || !rsm->F) { |
| setvar_i(intvar[ERRNO], errno); |
| setvar_i(res, -1); |
| break; |
| } |
| |
| if (!op->r.n) |
| R.v = intvar[F0]; |
| |
| i = awk_getline(rsm, R.v); |
| if (i > 0 && !op1) { |
| incvar(intvar[FNR]); |
| incvar(intvar[NR]); |
| } |
| setvar_i(res, i); |
| break; |
| } |
| |
| /* simple builtins */ |
| case XC( OC_FBLTIN ): { |
| double R_d = R_d; /* for compiler */ |
| |
| switch (opn) { |
| case F_in: |
| R_d = (long long)L_d; |
| break; |
| |
| case F_rn: |
| R_d = (double)rand() / (double)RAND_MAX; |
| break; |
| |
| case F_co: |
| if (ENABLE_FEATURE_AWK_LIBM) { |
| R_d = cos(L_d); |
| break; |
| } |
| |
| case F_ex: |
| if (ENABLE_FEATURE_AWK_LIBM) { |
| R_d = exp(L_d); |
| break; |
| } |
| |
| case F_lg: |
| if (ENABLE_FEATURE_AWK_LIBM) { |
| R_d = log(L_d); |
| break; |
| } |
| |
| case F_si: |
| if (ENABLE_FEATURE_AWK_LIBM) { |
| R_d = sin(L_d); |
| break; |
| } |
| |
| case F_sq: |
| if (ENABLE_FEATURE_AWK_LIBM) { |
| R_d = sqrt(L_d); |
| break; |
| } |
| |
| syntax_error(EMSG_NO_MATH); |
| break; |
| |
| case F_sr: |
| R_d = (double)seed; |
| seed = op1 ? (unsigned)L_d : (unsigned)time(NULL); |
| srand(seed); |
| break; |
| |
| case F_ti: |
| R_d = time(NULL); |
| break; |
| |
| case F_le: |
| debug_printf_eval("length: L.s:'%s'\n", L.s); |
| if (!op1) { |
| L.s = getvar_s(intvar[F0]); |
| debug_printf_eval("length: L.s='%s'\n", L.s); |
| } |
| else if (L.v->type & VF_ARRAY) { |
| R_d = L.v->x.array->nel; |
| debug_printf_eval("length: array_len:%d\n", L.v->x.array->nel); |
| break; |
| } |
| R_d = strlen(L.s); |
| break; |
| |
| case F_sy: |
| fflush_all(); |
| R_d = (ENABLE_FEATURE_ALLOW_EXEC && L.s && *L.s) |
| ? (system(L.s) >> 8) : 0; |
| break; |
| |
| case F_ff: |
| if (!op1) { |
| fflush(stdout); |
| } else if (L.s && *L.s) { |
| rstream *rsm = newfile(L.s); |
| fflush(rsm->F); |
| } else { |
| fflush_all(); |
| } |
| break; |
| |
| case F_cl: { |
| rstream *rsm; |
| int err = 0; |
| rsm = (rstream *)hash_search(fdhash, L.s); |
| debug_printf_eval("OC_FBLTIN F_cl rsm:%p\n", rsm); |
| if (rsm) { |
| debug_printf_eval("OC_FBLTIN F_cl " |
| "rsm->is_pipe:%d, ->F:%p\n", |
| rsm->is_pipe, rsm->F); |
| /* Can be NULL if open failed. Example: |
| * getline line <"doesnt_exist"; |
| * close("doesnt_exist"); <--- here rsm->F is NULL |
| */ |
| if (rsm->F) |
| err = rsm->is_pipe ? pclose(rsm->F) : fclose(rsm->F); |
| free(rsm->buffer); |
| hash_remove(fdhash, L.s); |
| } |
| if (err) |
| setvar_i(intvar[ERRNO], errno); |
| R_d = (double)err; |
| break; |
| } |
| } /* switch */ |
| setvar_i(res, R_d); |
| break; |
| } |
| |
| case XC( OC_BUILTIN ): |
| res = exec_builtin(op, res); |
| break; |
| |
| case XC( OC_SPRINTF ): |
| setvar_p(res, awk_printf(op1)); |
| break; |
| |
| case XC( OC_UNARY ): { |
| double Ld, R_d; |
| |
| Ld = R_d = getvar_i(R.v); |
| switch (opn) { |
| case 'P': |
| Ld = ++R_d; |
| goto r_op_change; |
| case 'p': |
| R_d++; |
| goto r_op_change; |
| case 'M': |
| Ld = --R_d; |
| goto r_op_change; |
| case 'm': |
| R_d--; |
| r_op_change: |
| setvar_i(R.v, R_d); |
| break; |
| case '!': |
| Ld = !istrue(R.v); |
| break; |
| case '-': |
| Ld = -R_d; |
| break; |
| } |
| setvar_i(res, Ld); |
| break; |
| } |
| |
| case XC( OC_FIELD ): { |
| int i = (int)getvar_i(R.v); |
| if (i < 0) |
| syntax_error(EMSG_NEGATIVE_FIELD); |
| if (i == 0) { |
| res = intvar[F0]; |
| } else { |
| split_f0(); |
| if (i > nfields) |
| fsrealloc(i); |
| res = &Fields[i - 1]; |
| } |
| break; |
| } |
| |
| /* concatenation (" ") and index joining (",") */ |
| case XC( OC_CONCAT ): |
| case XC( OC_COMMA ): { |
| const char *sep = ""; |
| if ((opinfo & OPCLSMASK) == OC_COMMA) |
| sep = getvar_s(intvar[SUBSEP]); |
| setvar_p(res, xasprintf("%s%s%s", L.s, sep, R.s)); |
| break; |
| } |
| |
| case XC( OC_LAND ): |
| setvar_i(res, istrue(L.v) ? ptest(op->r.n) : 0); |
| break; |
| |
| case XC( OC_LOR ): |
| setvar_i(res, istrue(L.v) ? 1 : ptest(op->r.n)); |
| break; |
| |
| case XC( OC_BINARY ): |
| case XC( OC_REPLACE ): { |
| double R_d = getvar_i(R.v); |
| debug_printf_eval("BINARY/REPLACE: R_d:%f opn:%c\n", R_d, opn); |
| switch (opn) { |
| case '+': |
| L_d += R_d; |
| break; |
| case '-': |
| L_d -= R_d; |
| break; |
| case '*': |
| L_d *= R_d; |
| break; |
| case '/': |
| if (R_d == 0) |
| syntax_error(EMSG_DIV_BY_ZERO); |
| L_d /= R_d; |
| break; |
| case '&': |
| if (ENABLE_FEATURE_AWK_LIBM) |
| L_d = pow(L_d, R_d); |
| else |
| syntax_error(EMSG_NO_MATH); |
| break; |
| case '%': |
| if (R_d == 0) |
| syntax_error(EMSG_DIV_BY_ZERO); |
| L_d -= (long long)(L_d / R_d) * R_d; |
| break; |
| } |
| debug_printf_eval("BINARY/REPLACE result:%f\n", L_d); |
| res = setvar_i(((opinfo & OPCLSMASK) == OC_BINARY) ? res : L.v, L_d); |
| break; |
| } |
| |
| case XC( OC_COMPARE ): { |
| int i = i; /* for compiler */ |
| double Ld; |
| |
| if (is_numeric(L.v) && is_numeric(R.v)) { |
| Ld = getvar_i(L.v) - getvar_i(R.v); |
| } else { |
| const char *l = getvar_s(L.v); |
| const char *r = getvar_s(R.v); |
| Ld = icase ? strcasecmp(l, r) : strcmp(l, r); |
| } |
| switch (opn & 0xfe) { |
| case 0: |
| i = (Ld > 0); |
| break; |
| case 2: |
| i = (Ld >= 0); |
| break; |
| case 4: |
| i = (Ld == 0); |
| break; |
| } |
| setvar_i(res, (i == 0) ^ (opn & 1)); |
| break; |
| } |
| |
| default: |
| syntax_error(EMSG_POSSIBLE_ERROR); |
| } /* switch */ |
| next: |
| if ((opinfo & OPCLSMASK) <= SHIFT_TIL_THIS) |
| op = op->a.n; |
| if ((opinfo & OPCLSMASK) >= RECUR_FROM_THIS) |
| break; |
| if (nextrec) |
| break; |
| } /* while (op) */ |
| |
| nvfree(v1); |
| debug_printf_eval("returning from %s(): %p\n", __func__, res); |
| return res; |
| #undef fnargs |
| #undef seed |
| #undef sreg |
| } |
| |
| |
| /* -------- main & co. -------- */ |
| |
| static int awk_exit(int r) |
| { |
| var tv; |
| unsigned i; |
| hash_item *hi; |
| |
| zero_out_var(&tv); |
| |
| if (!exiting) { |
| exiting = TRUE; |
| nextrec = FALSE; |
| evaluate(endseq.first, &tv); |
| } |
| |
| /* waiting for children */ |
| for (i = 0; i < fdhash->csize; i++) { |
| hi = fdhash->items[i]; |
| while (hi) { |
| if (hi->data.rs.F && hi->data.rs.is_pipe) |
| pclose(hi->data.rs.F); |
| hi = hi->next; |
| } |
| } |
| |
| exit(r); |
| } |
| |
| /* if expr looks like "var=value", perform assignment and return 1, |
| * otherwise return 0 */ |
| static int is_assignment(const char *expr) |
| { |
| char *exprc, *val; |
| |
| if (!isalnum_(*expr) || (val = strchr(expr, '=')) == NULL) { |
| return FALSE; |
| } |
| |
| exprc = xstrdup(expr); |
| val = exprc + (val - expr); |
| *val++ = '\0'; |
| |
| unescape_string_in_place(val); |
| setvar_u(newvar(exprc), val); |
| free(exprc); |
| return TRUE; |
| } |
| |
| /* switch to next input file */ |
| static rstream *next_input_file(void) |
| { |
| #define rsm (G.next_input_file__rsm) |
| #define files_happen (G.next_input_file__files_happen) |
| |
| FILE *F; |
| const char *fname, *ind; |
| |
| if (rsm.F) |
| fclose(rsm.F); |
| rsm.F = NULL; |
| rsm.pos = rsm.adv = 0; |
| |
| for (;;) { |
| if (getvar_i(intvar[ARGIND])+1 >= getvar_i(intvar[ARGC])) { |
| if (files_happen) |
| return NULL; |
| fname = "-"; |
| F = stdin; |
| break; |
| } |
| ind = getvar_s(incvar(intvar[ARGIND])); |
| fname = getvar_s(findvar(iamarray(intvar[ARGV]), ind)); |
| if (fname && *fname && !is_assignment(fname)) { |
| F = xfopen_stdin(fname); |
| break; |
| } |
| } |
| |
| files_happen = TRUE; |
| setvar_s(intvar[FILENAME], fname); |
| rsm.F = F; |
| return &rsm; |
| #undef rsm |
| #undef files_happen |
| } |
| |
| int awk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int awk_main(int argc UNUSED_PARAM, char **argv) |
| { |
| unsigned opt; |
| char *opt_F; |
| llist_t *list_v = NULL; |
| llist_t *list_f = NULL; |
| #if ENABLE_FEATURE_AWK_GNU_EXTENSIONS |
| llist_t *list_e = NULL; |
| #endif |
| int i, j; |
| var *v; |
| var tv; |
| char **envp; |
| char *vnames = (char *)vNames; /* cheat */ |
| char *vvalues = (char *)vValues; |
| |
| INIT_G(); |
| |
| /* Undo busybox.c, or else strtod may eat ','! This breaks parsing: |
| * $1,$2 == '$1,' '$2', NOT '$1' ',' '$2' */ |
| if (ENABLE_LOCALE_SUPPORT) |
| setlocale(LC_NUMERIC, "C"); |
| |
| zero_out_var(&tv); |
| |
| /* allocate global buffer */ |
| g_buf = xmalloc(MAXVARFMT + 1); |
| |
| vhash = hash_init(); |
| ahash = hash_init(); |
| fdhash = hash_init(); |
| fnhash = hash_init(); |
| |
| /* initialize variables */ |
| for (i = 0; *vnames; i++) { |
| intvar[i] = v = newvar(nextword(&vnames)); |
| if (*vvalues != '\377') |
| setvar_s(v, nextword(&vvalues)); |
| else |
| setvar_i(v, 0); |
| |
| if (*vnames == '*') { |
| v->type |= VF_SPECIAL; |
| vnames++; |
| } |
| } |
| |
| handle_special(intvar[FS]); |
| handle_special(intvar[RS]); |
| |
| newfile("/dev/stdin")->F = stdin; |
| newfile("/dev/stdout")->F = stdout; |
| newfile("/dev/stderr")->F = stderr; |
| |
| /* Huh, people report that sometimes environ is NULL. Oh well. */ |
| if (environ) for (envp = environ; *envp; envp++) { |
| /* environ is writable, thus we don't strdup it needlessly */ |
| char *s = *envp; |
| char *s1 = strchr(s, '='); |
| if (s1) { |
| *s1 = '\0'; |
| /* Both findvar and setvar_u take const char* |
| * as 2nd arg -> environment is not trashed */ |
| setvar_u(findvar(iamarray(intvar[ENVIRON]), s), s1 + 1); |
| *s1 = '='; |
| } |
| } |
| opt = getopt32(argv, OPTSTR_AWK, &opt_F, &list_v, &list_f, IF_FEATURE_AWK_GNU_EXTENSIONS(&list_e,) NULL); |
| argv += optind; |
| //argc -= optind; |
| if (opt & OPT_W) |
| bb_simple_error_msg("warning: option -W is ignored"); |
| if (opt & OPT_F) { |
| unescape_string_in_place(opt_F); |
| setvar_s(intvar[FS], opt_F); |
| } |
| while (list_v) { |
| if (!is_assignment(llist_pop(&list_v))) |
| bb_show_usage(); |
| } |
| while (list_f) { |
| char *s = NULL; |
| FILE *from_file; |
| |
| g_progname = llist_pop(&list_f); |
| from_file = xfopen_stdin(g_progname); |
| /* one byte is reserved for some trick in next_token */ |
| for (i = j = 1; j > 0; i += j) { |
| s = xrealloc(s, i + 4096); |
| j = fread(s + i, 1, 4094, from_file); |
| } |
| s[i] = '\0'; |
| fclose(from_file); |
| parse_program(s + 1); |
| free(s); |
| } |
| g_progname = "cmd. line"; |
| #if ENABLE_FEATURE_AWK_GNU_EXTENSIONS |
| while (list_e) { |
| parse_program(llist_pop(&list_e)); |
| } |
| #endif |
| if (!(opt & (OPT_f | OPT_e))) { |
| if (!*argv) |
| bb_show_usage(); |
| parse_program(*argv++); |
| } |
| |
| /* fill in ARGV array */ |
| setari_u(intvar[ARGV], 0, "awk"); |
| i = 0; |
| while (*argv) |
| setari_u(intvar[ARGV], ++i, *argv++); |
| setvar_i(intvar[ARGC], i + 1); |
| |
| evaluate(beginseq.first, &tv); |
| if (!mainseq.first && !endseq.first) |
| awk_exit(EXIT_SUCCESS); |
| |
| /* input file could already be opened in BEGIN block */ |
| if (!iF) |
| iF = next_input_file(); |
| |
| /* passing through input files */ |
| while (iF) { |
| nextfile = FALSE; |
| setvar_i(intvar[FNR], 0); |
| |
| while ((i = awk_getline(iF, intvar[F0])) > 0) { |
| nextrec = FALSE; |
| incvar(intvar[NR]); |
| incvar(intvar[FNR]); |
| evaluate(mainseq.first, &tv); |
| |
| if (nextfile) |
| break; |
| } |
| |
| if (i < 0) |
| syntax_error(strerror(errno)); |
| |
| iF = next_input_file(); |
| } |
| |
| awk_exit(EXIT_SUCCESS); |
| /*return 0;*/ |
| } |