| /* |
| *------------------------------------------------------------------ |
| * lex.c - API generator lexical analyzer |
| * |
| * Copyright (c) 1996-2009 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| *------------------------------------------------------------------ |
| */ |
| |
| #include <stdio.h> |
| #include <ctype.h> |
| #include <time.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| |
| #include "lex.h" |
| #include "node.h" |
| #include "gram.h" |
| |
| FILE *ifp, *ofp, *pythonfp; |
| char *vlib_app_name = "vpp"; |
| int dump_tree; |
| time_t starttime; |
| char *input_filename; |
| char *current_filename; |
| int current_filename_allocated; |
| unsigned long input_crc; |
| int yydebug; |
| |
| /* |
| * lexer variable definitions |
| */ |
| |
| static const char *version = "0.1"; |
| static int the_lexer_linenumber = 1; |
| static enum lex_state the_lexer_state = START_STATE; |
| |
| /* |
| * private prototypes |
| */ |
| static void usage (char *); |
| static int name_check (const char *, YYSTYPE *); |
| static int name_compare (const char *, const char *); |
| extern int yydebug; |
| extern YYSTYPE yylval; |
| |
| unsigned int crc32c_table[256] = { |
| 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, |
| 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB, |
| 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, |
| 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24, |
| 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, |
| 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384, |
| 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, |
| 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B, |
| 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, |
| 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35, |
| 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, |
| 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA, |
| 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, |
| 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A, |
| 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, |
| 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595, |
| 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, |
| 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957, |
| 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, |
| 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198, |
| 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, |
| 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38, |
| 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, |
| 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7, |
| 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, |
| 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789, |
| 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, |
| 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46, |
| 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, |
| 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6, |
| 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, |
| 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829, |
| 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, |
| 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93, |
| 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, |
| 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C, |
| 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, |
| 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC, |
| 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, |
| 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033, |
| 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, |
| 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D, |
| 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, |
| 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982, |
| 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, |
| 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622, |
| 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, |
| 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED, |
| 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, |
| 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F, |
| 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, |
| 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0, |
| 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, |
| 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540, |
| 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, |
| 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F, |
| 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, |
| 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1, |
| 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, |
| 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E, |
| 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, |
| 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E, |
| 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, |
| 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351 |
| }; |
| |
| static inline unsigned long CRC8 (unsigned long crc, |
| unsigned char d) |
| { |
| return ((crc >> 8) ^ crc32c_table[(crc ^ d) & 0xFF]); |
| } |
| static inline unsigned long CRC16 (unsigned long crc, |
| unsigned short d) |
| { |
| crc = CRC8 (crc, d & 0xff); |
| d = d >> 8; |
| crc = CRC8 (crc, d & 0xff); |
| return crc; |
| } |
| |
| |
| static unsigned long |
| crc_eliding_c_comments (const char *buf, unsigned long crc) |
| { |
| const char *p; |
| enum { cOTHER, /* */ |
| cSTRING, /* "... */ |
| cSBACKSLASH, /* "...\ */ |
| cCHAR, /* '... */ |
| cCBACKSLASH, /* '...\ */ |
| cSLASH, /* / */ |
| cSLASH_SLASH, /* //... */ |
| cSLASH_STAR, /* / *... */ |
| cSTAR /* / *...* */ |
| } ss = cOTHER; |
| |
| for (p = buf; ;) { |
| unsigned char c = *p++; |
| |
| switch (c) { |
| case 0: |
| switch (ss) { |
| case cOTHER: |
| return (crc); |
| case cSTRING: case cSBACKSLASH: |
| case cCHAR: case cCBACKSLASH: |
| case cSLASH: case cSLASH_SLASH: case cSLASH_STAR: case cSTAR: |
| fprintf (stderr, "Inopportune EOF: %s\n", buf); |
| exit (1); |
| } |
| break; |
| case '\"': |
| switch (ss) { |
| case cOTHER: ss = cSTRING; break; /* start string */ |
| case cSTRING: ss = cOTHER; break; /* end string */ |
| case cSBACKSLASH: ss = cSTRING; break; |
| case cCHAR: break; |
| case cCBACKSLASH: ss = cCHAR; break; |
| case cSLASH: crc = CRC8 (crc, '/'); ss = cOTHER; break; |
| case cSLASH_SLASH: continue; /* in comment */ |
| case cSLASH_STAR: continue; /* in comment */ |
| case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ |
| } |
| break; |
| case '\\': |
| switch (ss) { |
| case cOTHER: break; |
| case cSTRING: ss = cSBACKSLASH; break; |
| case cSBACKSLASH: ss = cSTRING; break; |
| case cCHAR: ss = cCBACKSLASH; break; |
| case cCBACKSLASH: ss = cCHAR; break; |
| case cSLASH: crc = CRC8 (crc, '/'); ; ss = cOTHER; break; |
| case cSLASH_SLASH: continue; /* in comment */ |
| case cSLASH_STAR: continue; /* in comment */ |
| case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ |
| } |
| break; |
| case '/': |
| switch (ss) { |
| case cOTHER: ss = cSLASH; continue; /* potential comment */ |
| case cSTRING: break; |
| case cSBACKSLASH: ss = cSTRING; break; |
| case cCHAR: break; |
| case cCBACKSLASH: ss = cCHAR; break; |
| case cSLASH: ss = cSLASH_SLASH; continue; /* start comment */ |
| case cSLASH_SLASH: continue; /* in comment */ |
| case cSLASH_STAR: continue; /* in comment */ |
| case cSTAR: ss = cOTHER; continue; /* end of comment */ |
| } |
| break; |
| case '*': |
| switch (ss) { |
| case cOTHER: break; |
| case cSTRING: break; |
| case cSBACKSLASH: ss = cSTRING; break; |
| case cCHAR: break; |
| case cCBACKSLASH: ss = cCHAR; break; |
| case cSLASH: ss = cSLASH_STAR; continue; /* start comment */ |
| case cSLASH_SLASH: continue; /* in comment */ |
| case cSLASH_STAR: ss = cSTAR; continue; /* potential end */ |
| case cSTAR: continue; /* still potential end of comment */ |
| } |
| break; |
| case '\n': case '\r': case ' ': case '\t': case '\014': |
| switch (ss) { |
| case cOTHER: continue; /* ignore all whitespace */ |
| case cSTRING: break; |
| case cSBACKSLASH: ss = cSTRING; break; |
| case cCHAR: break; |
| case cCBACKSLASH: ss = cCHAR; break; |
| case cSLASH: c = '/'; ss = cOTHER; break; |
| case cSLASH_SLASH: |
| if (c == '\n' || c == '\r') ss = cOTHER; /* end comment */ |
| continue; |
| case cSLASH_STAR: continue; /* in comment */ |
| case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ |
| } |
| default: |
| switch (ss) { |
| case cOTHER: break; |
| case cSTRING: break; |
| case cSBACKSLASH: ss = cSTRING; break; |
| case cCHAR: break; |
| case cCBACKSLASH: ss = cCHAR; break; |
| case cSLASH: crc = CRC8 (crc, '/'); ss = cOTHER; break; |
| case cSLASH_SLASH: continue; /* in comment */ |
| case cSLASH_STAR: continue; /* in comment */ |
| case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ |
| } |
| } |
| crc = CRC8 (crc, c); |
| } |
| } |
| |
| /* |
| * main |
| */ |
| int main (int argc, char **argv) |
| { |
| int curarg = 1; |
| char *ofile=0; |
| char *pythonfile=0; |
| char *show_name=0; |
| |
| while (curarg < argc) { |
| if (!strncmp (argv [curarg], "--verbose", 3)) { |
| fprintf (stderr, "%s version %s\n", argv [0], version); |
| curarg++; |
| continue; |
| } |
| |
| if (!strncmp (argv [curarg], "--yydebug", 3)) { |
| yydebug = 1; |
| curarg++; |
| continue; |
| } |
| |
| if (!strncmp (argv [curarg], "--dump", 3)) { |
| dump_tree = 1; |
| curarg++; |
| continue; |
| } |
| |
| if (!strncmp (argv[curarg], "--show-name", 3)) { |
| curarg++; |
| if (curarg < argc) { |
| show_name = argv[curarg]; |
| curarg++; |
| continue; |
| } else { |
| fprintf(stderr, "Missing filename after --show-name \n"); |
| exit(1); |
| } |
| } |
| |
| if (!strncmp (argv [curarg], "--input", 3)) { |
| curarg++; |
| if (curarg < argc) { |
| input_filename = argv[curarg]; |
| if (!strcmp (argv [curarg], "-")) |
| ifp = stdin; |
| else |
| ifp = fopen (argv [curarg], "r"); |
| if (ifp == NULL) { |
| fprintf (stderr, "Couldn't open input file %s\n", |
| argv[curarg]); |
| exit (1); |
| } |
| curarg++; |
| } else { |
| fprintf(stderr, "Missing filename after --input\n"); |
| exit(1); |
| } |
| continue; |
| } |
| if (!strncmp (argv [curarg], "--output", 3)) { |
| curarg++; |
| if (curarg < argc) { |
| ofp = fopen (argv[curarg], "w"); |
| if (ofp == NULL) { |
| fprintf (stderr, "Couldn't open output file %s\n", |
| argv[curarg]); |
| exit (1); |
| } |
| ofile = argv[curarg]; |
| curarg++; |
| } else { |
| fprintf(stderr, "Missing filename after --output\n"); |
| exit(1); |
| } |
| continue; |
| } |
| if (!strncmp (argv [curarg], "--python", 8)) { |
| curarg++; |
| if (curarg < argc) { |
| pythonfp = fopen (argv[curarg], "w"); |
| if (pythonfp == NULL) { |
| fprintf (stderr, "Couldn't open python output file %s\n", |
| argv[curarg]); |
| exit (1); |
| } |
| pythonfile = argv[curarg]; |
| curarg++; |
| } else { |
| fprintf(stderr, "Missing filename after --python\n"); |
| exit(1); |
| } |
| continue; |
| } |
| if (!strncmp (argv [curarg], "--app", 4)) { |
| curarg++; |
| if (curarg < argc) { |
| vlib_app_name = argv[curarg]; |
| curarg++; |
| } else { |
| fprintf(stderr, "Missing app name after --app\n"); |
| exit(1); |
| } |
| continue; |
| } |
| |
| usage(argv[0]); |
| exit (1); |
| } |
| if (ofp == NULL) { |
| ofile = 0; |
| } |
| if (pythonfp == NULL) { |
| pythonfile = 0; |
| } |
| if (ifp == NULL) { |
| fprintf(stderr, "No input file specified...\n"); |
| exit(1); |
| } |
| if (show_name) { |
| input_filename = show_name; |
| } |
| |
| starttime = time (0); |
| |
| if (yyparse() == 0) { |
| fclose (ifp); |
| curarg -= 2; |
| if (ofile) { |
| printf ("Output written to %s\n", ofile); |
| fclose (ofp); |
| } |
| if (pythonfile) { |
| printf ("Python bindings written to %s\n", pythonfile); |
| fclose (pythonfp); |
| } |
| } |
| else { |
| fclose (ifp); |
| fclose (ofp); |
| if (ofile) { |
| printf ("Removing %s\n", ofile); |
| unlink (ofile); |
| } |
| if (pythonfile) { |
| printf ("Removing %s\n", pythonfile); |
| unlink (pythonfile); |
| } |
| exit (1); |
| } |
| exit (0); |
| } |
| |
| /* |
| * usage |
| */ |
| static void usage (char *progname) |
| { |
| fprintf (stderr, |
| "usage: %s --input <filename> [--output <filename>] [--python <filename>]\n%s", |
| progname, |
| " [--yydebug] [--dump-tree]\n"); |
| exit (1); |
| } |
| |
| /* |
| * yyerror |
| */ |
| void yyerror (char *s) |
| { |
| fprintf (stderr, "%s:%d %s\n", current_filename, the_lexer_linenumber, s); |
| } |
| |
| static char namebuf [MAXNAME]; |
| |
| /* |
| * yylex (well, yylex_1: The real yylex below does crc-hackery) |
| */ |
| static int yylex_1 (void) |
| { |
| int nameidx=0; |
| char c; |
| int at_bol=1; |
| enum { LP_INITIAL_WHITESPACE, LP_LINE_NUMBER, |
| LP_PRE_FILENAME_WHITESPACE, LP_FILENAME, |
| LP_POST_FILENAME, |
| LP_OTHER |
| } lp_substate = LP_INITIAL_WHITESPACE; |
| |
| again: |
| switch (the_lexer_state) { |
| /* |
| * START state -- looking for something interesting |
| */ |
| case START_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| |
| switch (c) { |
| case '\n': |
| the_lexer_linenumber++; |
| at_bol=1; |
| goto again; |
| |
| case '#': |
| if (!at_bol) { |
| fprintf (stderr, "unknown token /%c at line %d\n", |
| c, the_lexer_linenumber); |
| return (BARF); |
| } |
| |
| the_lexer_state = LINE_PRAGMA_STATE; |
| lp_substate = LP_INITIAL_WHITESPACE; |
| goto again; |
| |
| /* FALLTHROUGH */ |
| case '\t': |
| case ' ': |
| goto again; |
| |
| case '(': |
| return (LPAR); |
| |
| case ')': |
| return (RPAR); |
| |
| case ';': |
| return (SEMI); |
| |
| case '[': |
| return (LBRACK); |
| |
| case ']': |
| return (RBRACK); |
| |
| case '{': |
| return (LCURLY); |
| |
| case '}': |
| return (RCURLY); |
| |
| case ',': |
| return (COMMA); |
| |
| case '"': |
| nameidx = 0; |
| the_lexer_state = STRING_STATE; |
| goto again; |
| |
| case '@': |
| nameidx = 0; |
| the_lexer_state = HELPER_STATE; |
| goto again; |
| |
| case '/': |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| |
| if (c == '/') { |
| the_lexer_state = CPP_COMMENT_STATE; |
| goto again; |
| } else if (c == '*') { |
| the_lexer_state = C_COMMENT_STATE; |
| goto again; |
| } else { |
| fprintf (stderr, "unknown token /%c at line %d\n", |
| c, the_lexer_linenumber); |
| return (BARF); |
| } |
| |
| case '\\': |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| |
| /* Note fallthrough... */ |
| |
| default: |
| if (isalpha (c) || c == '_') { |
| namebuf [0] = c; |
| nameidx = 1; |
| the_lexer_state = NAME_STATE; |
| goto again; |
| } else if (isdigit(c)) { |
| namebuf [0] = c; |
| nameidx = 1; |
| the_lexer_state = NUMBER_STATE; |
| goto again; |
| } |
| |
| fprintf (stderr, "unknown token %c at line %d\n", |
| c, the_lexer_linenumber); |
| return (BARF); |
| } |
| |
| /* |
| * NAME state -- eat the rest of a name |
| */ |
| case NAME_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| |
| if (!isalnum (c) && c != '_') { |
| ungetc (c, ifp); |
| namebuf [nameidx] = 0; |
| the_lexer_state = START_STATE; |
| return (name_check (namebuf, &yylval)); |
| } |
| if (nameidx >= (MAXNAME-1)) { |
| fprintf(stderr, "lex input buffer overflow...\n"); |
| exit(1); |
| } |
| namebuf [nameidx++] = c; |
| goto again; |
| |
| /* |
| * NUMBER state -- eat the rest of a number |
| */ |
| case NUMBER_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| |
| if (!isdigit (c)) { |
| ungetc (c, ifp); |
| namebuf [nameidx] = 0; |
| the_lexer_state = START_STATE; |
| yylval = (void *) atol(namebuf); |
| return (NUMBER); |
| } |
| if (nameidx >= (MAXNAME-1)) { |
| fprintf(stderr, "lex input buffer overflow...\n"); |
| exit(1); |
| } |
| namebuf [nameidx++] = c; |
| goto again; |
| |
| /* |
| * C_COMMENT state -- eat a peach |
| */ |
| case C_COMMENT_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| if (c == '*') { |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| if (c == '/') { |
| the_lexer_state = START_STATE; |
| goto again; |
| } |
| } |
| if (c == '\n') |
| the_lexer_linenumber++; |
| goto again; |
| |
| /* |
| * CPP_COMMENT state -- eat a plum |
| */ |
| |
| case CPP_COMMENT_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| if (c == '\n') { |
| the_lexer_linenumber++; |
| the_lexer_state = START_STATE; |
| goto again; |
| } |
| goto again; |
| |
| case STRING_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| switch (c) { |
| case '\\': |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| namebuf[nameidx++] = c; |
| goto again; |
| |
| case '"': |
| namebuf[nameidx] = 0; |
| yylval = (YYSTYPE) sxerox (namebuf); |
| the_lexer_state = START_STATE; |
| return (STRING); |
| |
| default: |
| if (c == '\n') |
| the_lexer_linenumber++; |
| |
| if (nameidx >= (MAXNAME-1)) { |
| fprintf(stderr, "lex input buffer overflow...\n"); |
| exit(1); |
| } |
| namebuf[nameidx++] = c; |
| goto again; |
| } |
| break; |
| |
| case HELPER_STATE: |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| switch (c) { |
| case '\\': |
| c = getc (ifp); |
| if (feof (ifp)) |
| return (EOF); |
| namebuf[nameidx] = c; |
| goto again; |
| |
| case '@': |
| namebuf[nameidx] = 0; |
| yylval = (YYSTYPE) sxerox (namebuf); |
| the_lexer_state = START_STATE; |
| return (HELPER_STRING); |
| |
| default: |
| if (c == '\n') |
| the_lexer_linenumber++; |
| |
| /* |
| * CPP makes it approximately impossible to |
| * type "#define FOO 123", so we provide a |
| * lexical trick to achieve that result |
| */ |
| |
| if (c == '$') |
| c = '#'; |
| |
| if (nameidx >= (MAXNAME-1)) { |
| fprintf(stderr, "lex input buffer overflow...\n"); |
| exit(1); |
| } |
| namebuf[nameidx++] = c; |
| goto again; |
| } |
| break; |
| |
| case LINE_PRAGMA_STATE: |
| /* We're only interested in lines of the form # 259 "foo.c" 17 */ |
| |
| switch (lp_substate) { |
| |
| case LP_INITIAL_WHITESPACE: /* no number seen yet */ |
| c = getc(ifp); |
| if (feof(ifp)) |
| return(EOF); |
| if (c >= '0' && c <= '9') { |
| namebuf[nameidx++] = c; |
| lp_substate = LP_LINE_NUMBER; |
| } else if (c == '\n') { |
| goto lp_end_of_line; |
| } else if (c != ' ' && c != '\t') { |
| /* Nothing */ |
| } else { |
| lp_substate = LP_OTHER; |
| } |
| goto again; |
| |
| case LP_LINE_NUMBER: /* eating linenumber */ |
| c = getc(ifp); |
| if (feof(ifp)) |
| return(EOF); |
| if (c >= '0' && c <= '9') { |
| namebuf[nameidx++] = c; |
| } else if (c == ' ' || c == '\t') { |
| namebuf[nameidx++] = 0; |
| the_lexer_linenumber = atol(namebuf); |
| lp_substate = LP_PRE_FILENAME_WHITESPACE; |
| } else if (c == '\n') { |
| goto lp_end_of_line; |
| } else { |
| lp_substate = LP_OTHER; |
| } |
| goto again; |
| |
| case LP_PRE_FILENAME_WHITESPACE: /* awaiting filename */ |
| c = getc(ifp); |
| if (feof(ifp)) |
| return(EOF); |
| |
| if (c == '"') { |
| lp_substate = LP_FILENAME; |
| nameidx = 0; |
| } else if (c == ' ' || c == '\t') { |
| /* nothing */ |
| } else if (c == '\n') { |
| goto lp_end_of_line; |
| } else { |
| lp_substate = LP_OTHER; |
| } |
| goto again; |
| |
| case LP_FILENAME: /* eating filename */ |
| c = getc(ifp); |
| if (feof(ifp)) |
| return(EOF); |
| |
| if (c == '"') { |
| lp_substate = LP_POST_FILENAME; |
| namebuf[nameidx] = 0; |
| } else if (c == '\n') { |
| goto lp_end_of_line; /* syntax error... */ |
| } else { |
| namebuf[nameidx++] = c; |
| } |
| goto again; |
| |
| case LP_POST_FILENAME: /* ignoring rest of line */ |
| case LP_OTHER: |
| c = getc(ifp); |
| if (feof(ifp)) |
| return(EOF); |
| |
| if (c == '\n') { |
| if (lp_substate == LP_POST_FILENAME) { |
| if (current_filename_allocated) { |
| current_filename_allocated = 0; |
| free(current_filename); |
| } |
| |
| if (!strcmp(namebuf, "<stdin>")) { |
| current_filename = input_filename; |
| } else { |
| current_filename = sxerox(namebuf); |
| current_filename_allocated = 1; |
| } |
| } |
| lp_end_of_line: |
| the_lexer_state = START_STATE; |
| at_bol = 1; |
| nameidx = 0; |
| } |
| goto again; |
| } |
| break; |
| } |
| fprintf (stderr, "LEXER BUG!\n"); |
| exit (1); |
| /* NOTREACHED */ |
| return (0); |
| } |
| |
| /* |
| * Parse a token and side-effect input_crc |
| * in a whitespace- and comment-insensitive fashion. |
| */ |
| int yylex (void) |
| { |
| /* |
| * Accumulate a crc32-based signature while processing the |
| * input file. The goal is to come up with a magic number |
| * which changes precisely when the original input file changes |
| * but which ignores whitespace changes. |
| */ |
| unsigned long crc = input_crc; |
| int node_type = yylex_1 (); |
| |
| switch (node_type) { |
| case PRIMTYPE: |
| case NAME: |
| case NUMBER: |
| case STRING: |
| case HELPER_STRING: { |
| /* We know these types accumulated token text into namebuf */ |
| /* HELPER_STRING may still contain C comments. Argh. */ |
| crc = crc_eliding_c_comments (namebuf, crc); |
| break; |
| } |
| |
| /* Other node types have no "substate" */ |
| /* This code is written in this curious fashion because we |
| * want the generated CRC to be independent of the particular |
| * values a particular version of lex/bison assigned to various states. |
| */ |
| |
| /* case NAME: crc = CRC16 (crc, 257); break; */ |
| case RPAR: crc = CRC16 (crc, 258); break; |
| case LPAR: crc = CRC16 (crc, 259); break; |
| case SEMI: crc = CRC16 (crc, 260); break; |
| case LBRACK: crc = CRC16 (crc, 261); break; |
| case RBRACK: crc = CRC16 (crc, 262); break; |
| /* case NUMBER: crc = CRC16 (crc, 263); break; */ |
| /* case PRIMTYPE: crc = CRC16 (crc, 264); break; */ |
| case BARF: crc = CRC16 (crc, 265); break; |
| case TPACKED: crc = CRC16 (crc, 266); break; |
| case DEFINE: crc = CRC16 (crc, 267); break; |
| case LCURLY: crc = CRC16 (crc, 268); break; |
| case RCURLY: crc = CRC16 (crc, 269); break; |
| /* case STRING: crc = CRC16 (crc, 270); break; */ |
| case UNION: crc = CRC16 (crc, 271); break; |
| /* case HELPER_STRING: crc = CRC16 (crc, 272); break; */ |
| case COMMA: crc = CRC16 (crc, 273); break; |
| case NOVERSION: crc = CRC16 (crc, 274); break; |
| case MANUAL_PRINT: crc = CRC16 (crc, 275); break; |
| case MANUAL_ENDIAN: crc = CRC16 (crc, 276); break; |
| case TYPEONLY: crc = CRC16 (crc, 278); break; |
| case DONT_TRACE: crc = CRC16 (crc, 279); break; |
| |
| case EOF: crc = CRC16 (crc, ~0); break; /* hysterical compatibility */ |
| |
| default: |
| fprintf(stderr, "yylex: node_type %d missing state CRC cookie\n", |
| node_type); |
| exit(1); |
| } |
| |
| input_crc = crc; |
| return (node_type); |
| } |
| |
| |
| /* |
| * name_check -- see if the name we just ate |
| * matches a known keyword. If so, set yylval |
| * to a new instance of <subclass of node>, and return PARSER_MACRO |
| * |
| * Otherwise, set yylval to sxerox (s) and return NAME |
| */ |
| |
| static struct keytab { |
| char *name; |
| enum node_subclass subclass_id; |
| } keytab [] = |
| /* Keep the table sorted, binary search used below! */ |
| { |
| {"define", NODE_DEFINE}, |
| {"dont_trace", NODE_DONT_TRACE}, |
| {"f64", NODE_F64}, |
| {"i16", NODE_I16}, |
| {"i32", NODE_I32}, |
| {"i64", NODE_I64}, |
| {"i8", NODE_I8}, |
| {"manual_endian", NODE_MANUAL_ENDIAN}, |
| {"manual_print", NODE_MANUAL_PRINT}, |
| {"noversion", NODE_NOVERSION}, |
| {"packed", NODE_PACKED}, |
| {"typeonly", NODE_TYPEONLY}, |
| {"u16", NODE_U16}, |
| {"u32", NODE_U32}, |
| {"u64", NODE_U64}, |
| {"u8", NODE_U8}, |
| {"union", NODE_UNION}, |
| {"uword", NODE_UWORD}, |
| }; |
| |
| static int name_check (const char *s, YYSTYPE *token_value) |
| { |
| enum node_subclass subclass_id; |
| int top, bot, mid; |
| int result; |
| |
| for (top = 0, bot = (sizeof(keytab) / sizeof(struct keytab))-1; |
| bot >= top; ) { |
| mid = (top + bot) / 2; |
| result = name_compare (s, keytab[mid].name); |
| if (result < 0) |
| bot = mid - 1; |
| else if (result > 0) |
| top = mid + 1; |
| else { |
| subclass_id = keytab[mid].subclass_id; |
| |
| switch (subclass_id) { |
| case NODE_U8: |
| case NODE_U16: |
| case NODE_U32: |
| case NODE_U64: |
| case NODE_I8: |
| case NODE_I16: |
| case NODE_I32: |
| case NODE_I64: |
| case NODE_F64: |
| case NODE_UWORD: |
| *token_value = make_node(subclass_id); |
| return (PRIMTYPE); |
| |
| case NODE_PACKED: |
| *token_value = make_node(subclass_id); |
| return (TPACKED); |
| |
| case NODE_DEFINE: |
| *token_value = make_node(subclass_id); |
| return(DEFINE); |
| |
| case NODE_MANUAL_PRINT: |
| *token_value = (YYSTYPE) NODE_FLAG_MANUAL_PRINT; |
| return (MANUAL_PRINT); |
| |
| case NODE_MANUAL_ENDIAN: |
| *token_value = (YYSTYPE) NODE_FLAG_MANUAL_ENDIAN; |
| return (MANUAL_ENDIAN); |
| |
| case NODE_TYPEONLY: |
| *token_value = (YYSTYPE) NODE_FLAG_TYPEONLY; |
| return(TYPEONLY); |
| |
| case NODE_DONT_TRACE: |
| *token_value = (YYSTYPE) NODE_FLAG_DONT_TRACE; |
| return(DONT_TRACE); |
| |
| case NODE_NOVERSION: |
| return(NOVERSION); |
| |
| case NODE_UNION: |
| return(UNION); |
| |
| default: |
| fprintf (stderr, "fatal: keytab botch!\n"); |
| exit (1); |
| } |
| } |
| } |
| *token_value = (YYSTYPE) sxerox (s); |
| return (NAME); |
| } |
| |
| /* |
| * sxerox |
| */ |
| |
| char *sxerox (const char *s) |
| { |
| int len = strlen (s); |
| char *rv; |
| |
| rv = (char *) malloc (len+1); |
| strcpy (rv, s); |
| return (rv); |
| } |
| |
| /* |
| * name_compare |
| */ |
| |
| int name_compare (const char *s1, const char *s2) |
| { |
| char c1, c2; |
| |
| while (*s1 && *s2) { |
| c1 = *s1++; |
| c2 = *s2++; |
| |
| c1 = tolower (c1); |
| c2 = tolower (c2); |
| if (c1 < c2) |
| return (-1); |
| else if (c1 > c2) |
| return (1); |
| } |
| if (*s1 < *s2) |
| return (-1); |
| else if (*s1 > *s2) |
| return (1); |
| return (0); |
| } |