| /* vi: set sw=4 ts=4: */ |
| /* printf - format and print data |
| Copyright (C) 90, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software Foundation, |
| Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* Usage: printf format [argument...] |
| |
| A front end to the printf function that lets it be used from the shell. |
| |
| Backslash escapes: |
| |
| \" = double quote |
| \\ = backslash |
| \a = alert (bell) |
| \b = backspace |
| \c = produce no further output |
| \f = form feed |
| \n = new line |
| \r = carriage return |
| \t = horizontal tab |
| \v = vertical tab |
| \0ooo = octal number (ooo is 0 to 3 digits) |
| \xhhh = hexadecimal number (hhh is 1 to 3 digits) |
| |
| Additional directive: |
| |
| %b = print an argument string, interpreting backslash escapes |
| |
| The `format' argument is re-used as many times as necessary |
| to convert all of the given arguments. |
| |
| David MacKenzie <djm@gnu.ai.mit.edu> */ |
| |
| |
| // 19990508 Busy Boxed! Dave Cinege |
| |
| #include "busybox.h" |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <ctype.h> |
| |
| |
| #ifndef S_IFMT |
| static const int S_IFMT = 0170000; |
| #endif |
| #if !defined(S_ISBLK) && defined(S_IFBLK) |
| # define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) |
| #endif |
| #if !defined(S_ISCHR) && defined(S_IFCHR) |
| # define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) |
| #endif |
| #if !defined(S_ISDIR) && defined(S_IFDIR) |
| # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) |
| #endif |
| #if !defined(S_ISREG) && defined(S_IFREG) |
| # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) |
| #endif |
| #if !defined(S_ISFIFO) && defined(S_IFIFO) |
| # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) |
| #endif |
| #if !defined(S_ISLNK) && defined(S_IFLNK) |
| # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) |
| #endif |
| #if !defined(S_ISSOCK) && defined(S_IFSOCK) |
| # define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) |
| #endif |
| #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */ |
| # define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB) |
| # define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC) |
| #endif |
| #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */ |
| # define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK) |
| #endif |
| |
| #define IN_CTYPE_DOMAIN(c) 1 |
| |
| #ifdef isblank |
| # define ISBLANK(c) (IN_CTYPE_DOMAIN (c) && isblank (c)) |
| #else |
| # define ISBLANK(c) ((c) == ' ' || (c) == '\t') |
| #endif |
| #ifdef isgraph |
| # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isgraph (c)) |
| #else |
| # define ISGRAPH(c) (IN_CTYPE_DOMAIN (c) && isprint (c) && !isspace (c)) |
| #endif |
| |
| #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint (c)) |
| #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum (c)) |
| #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c)) |
| #define ISCNTRL(c) (IN_CTYPE_DOMAIN (c) && iscntrl (c)) |
| #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c)) |
| #define ISPUNCT(c) (IN_CTYPE_DOMAIN (c) && ispunct (c)) |
| #define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c)) |
| #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (c)) |
| #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit (c)) |
| #define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c)) |
| #define ISDIGIT(c) ((unsigned) (c) - '0' <= 9) |
| |
| #define isodigit(c) ((c) >= '0' && (c) <= '7') |
| #define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0') |
| #define octtobin(c) ((c) - '0') |
| |
| static double xstrtod __P((char *s)); |
| static int print_esc __P((char *escstart)); |
| static int print_formatted __P((char *format, int argc, char **argv)); |
| static long xstrtol __P((char *s)); |
| static unsigned long xstrtoul __P((char *s)); |
| static void print_direc |
| __P( |
| |
| (char *start, size_t length, int field_width, int precision, |
| char *argument)); |
| static void print_esc_char __P((int c)); |
| static void print_esc_string __P((char *str)); |
| static void verify __P((char *s, char *end)); |
| |
| /* The value to return to the calling program. */ |
| static int exit_status; |
| |
| int printf_main(int argc, char **argv) |
| { |
| char *format; |
| int args_used; |
| |
| exit_status = 0; |
| if (argc <= 1 || **(argv + 1) == '-') { |
| usage(printf_usage); |
| } |
| |
| format = argv[1]; |
| argc -= 2; |
| argv += 2; |
| |
| do { |
| args_used = print_formatted(format, argc, argv); |
| argc -= args_used; |
| argv += args_used; |
| } |
| while (args_used > 0 && argc > 0); |
| |
| /* |
| if (argc > 0) |
| fprintf(stderr, "excess args ignored"); |
| */ |
| |
| return(exit_status); |
| } |
| |
| /* Print the text in FORMAT, using ARGV (with ARGC elements) for |
| arguments to any `%' directives. |
| Return the number of elements of ARGV used. */ |
| |
| static int print_formatted(char *format, int argc, char **argv) |
| { |
| int save_argc = argc; /* Preserve original value. */ |
| char *f; /* Pointer into `format'. */ |
| char *direc_start; /* Start of % directive. */ |
| size_t direc_length; /* Length of % directive. */ |
| int field_width; /* Arg to first '*', or -1 if none. */ |
| int precision; /* Arg to second '*', or -1 if none. */ |
| |
| for (f = format; *f; ++f) { |
| switch (*f) { |
| case '%': |
| direc_start = f++; |
| direc_length = 1; |
| field_width = precision = -1; |
| if (*f == '%') { |
| putchar('%'); |
| break; |
| } |
| if (*f == 'b') { |
| if (argc > 0) { |
| print_esc_string(*argv); |
| ++argv; |
| --argc; |
| } |
| break; |
| } |
| if (strchr("-+ #", *f)) { |
| ++f; |
| ++direc_length; |
| } |
| if (*f == '*') { |
| ++f; |
| ++direc_length; |
| if (argc > 0) { |
| field_width = xstrtoul(*argv); |
| ++argv; |
| --argc; |
| } else |
| field_width = 0; |
| } else |
| while (ISDIGIT(*f)) { |
| ++f; |
| ++direc_length; |
| } |
| if (*f == '.') { |
| ++f; |
| ++direc_length; |
| if (*f == '*') { |
| ++f; |
| ++direc_length; |
| if (argc > 0) { |
| precision = xstrtoul(*argv); |
| ++argv; |
| --argc; |
| } else |
| precision = 0; |
| } else |
| while (ISDIGIT(*f)) { |
| ++f; |
| ++direc_length; |
| } |
| } |
| if (*f == 'l' || *f == 'L' || *f == 'h') { |
| ++f; |
| ++direc_length; |
| } |
| /* |
| if (!strchr ("diouxXfeEgGcs", *f)) |
| fprintf(stderr, "%%%c: invalid directive", *f); |
| */ |
| ++direc_length; |
| if (argc > 0) { |
| print_direc(direc_start, direc_length, field_width, |
| precision, *argv); |
| ++argv; |
| --argc; |
| } else |
| print_direc(direc_start, direc_length, field_width, |
| precision, ""); |
| break; |
| |
| case '\\': |
| f += print_esc(f); |
| break; |
| |
| default: |
| putchar(*f); |
| } |
| } |
| |
| return save_argc - argc; |
| } |
| |
| /* Print a \ escape sequence starting at ESCSTART. |
| Return the number of characters in the escape sequence |
| besides the backslash. */ |
| |
| static int print_esc(char *escstart) |
| { |
| register char *p = escstart + 1; |
| int esc_value = 0; /* Value of \nnn escape. */ |
| int esc_length; /* Length of \nnn escape. */ |
| |
| /* \0ooo and \xhhh escapes have maximum length of 3 chars. */ |
| if (*p == 'x') { |
| for (esc_length = 0, ++p; |
| esc_length < 3 && ISXDIGIT(*p); ++esc_length, ++p) |
| esc_value = esc_value * 16 + hextobin(*p); |
| /* if (esc_length == 0) |
| fprintf(stderr, "missing hex in esc"); |
| */ |
| putchar(esc_value); |
| } else if (*p == '0') { |
| for (esc_length = 0, ++p; |
| esc_length < 3 && isodigit(*p); ++esc_length, ++p) |
| esc_value = esc_value * 8 + octtobin(*p); |
| putchar(esc_value); |
| } else if (strchr("\"\\abcfnrtv", *p)) |
| print_esc_char(*p++); |
| /* else |
| fprintf(stderr, "\\%c: invalid esc", *p); |
| */ |
| return p - escstart - 1; |
| } |
| |
| /* Output a single-character \ escape. */ |
| |
| static void print_esc_char(int c) |
| { |
| switch (c) { |
| case 'a': /* Alert. */ |
| putchar(7); |
| break; |
| case 'b': /* Backspace. */ |
| putchar(8); |
| break; |
| case 'c': /* Cancel the rest of the output. */ |
| exit(0); |
| break; |
| case 'f': /* Form feed. */ |
| putchar(12); |
| break; |
| case 'n': /* New line. */ |
| putchar(10); |
| break; |
| case 'r': /* Carriage return. */ |
| putchar(13); |
| break; |
| case 't': /* Horizontal tab. */ |
| putchar(9); |
| break; |
| case 'v': /* Vertical tab. */ |
| putchar(11); |
| break; |
| default: |
| putchar(c); |
| break; |
| } |
| } |
| |
| /* Print string STR, evaluating \ escapes. */ |
| |
| static void print_esc_string(char *str) |
| { |
| for (; *str; str++) |
| if (*str == '\\') |
| str += print_esc(str); |
| else |
| putchar(*str); |
| } |
| |
| static void |
| print_direc(char *start, size_t length, int field_width, int precision, |
| char *argument) |
| { |
| char *p; /* Null-terminated copy of % directive. */ |
| |
| p = xmalloc((unsigned) (length + 1)); |
| strncpy(p, start, length); |
| p[length] = 0; |
| |
| switch (p[length - 1]) { |
| case 'd': |
| case 'i': |
| if (field_width < 0) { |
| if (precision < 0) |
| printf(p, xstrtol(argument)); |
| else |
| printf(p, precision, xstrtol(argument)); |
| } else { |
| if (precision < 0) |
| printf(p, field_width, xstrtol(argument)); |
| else |
| printf(p, field_width, precision, xstrtol(argument)); |
| } |
| break; |
| |
| case 'o': |
| case 'u': |
| case 'x': |
| case 'X': |
| if (field_width < 0) { |
| if (precision < 0) |
| printf(p, xstrtoul(argument)); |
| else |
| printf(p, precision, xstrtoul(argument)); |
| } else { |
| if (precision < 0) |
| printf(p, field_width, xstrtoul(argument)); |
| else |
| printf(p, field_width, precision, xstrtoul(argument)); |
| } |
| break; |
| |
| case 'f': |
| case 'e': |
| case 'E': |
| case 'g': |
| case 'G': |
| if (field_width < 0) { |
| if (precision < 0) |
| printf(p, xstrtod(argument)); |
| else |
| printf(p, precision, xstrtod(argument)); |
| } else { |
| if (precision < 0) |
| printf(p, field_width, xstrtod(argument)); |
| else |
| printf(p, field_width, precision, xstrtod(argument)); |
| } |
| break; |
| |
| case 'c': |
| printf(p, *argument); |
| break; |
| |
| case 's': |
| if (field_width < 0) { |
| if (precision < 0) |
| printf(p, argument); |
| else |
| printf(p, precision, argument); |
| } else { |
| if (precision < 0) |
| printf(p, field_width, argument); |
| else |
| printf(p, field_width, precision, argument); |
| } |
| break; |
| } |
| |
| free(p); |
| } |
| |
| static unsigned long xstrtoul(char *s) |
| { |
| char *end; |
| unsigned long val; |
| |
| errno = 0; |
| val = strtoul(s, &end, 0); |
| verify(s, end); |
| return val; |
| } |
| |
| static long xstrtol(char *s) |
| { |
| char *end; |
| long val; |
| |
| errno = 0; |
| val = strtol(s, &end, 0); |
| verify(s, end); |
| return val; |
| } |
| |
| static double xstrtod(char *s) |
| { |
| char *end; |
| double val; |
| |
| errno = 0; |
| val = strtod(s, &end); |
| verify(s, end); |
| return val; |
| } |
| |
| static void verify(char *s, char *end) |
| { |
| if (errno) { |
| fprintf(stderr, "%s", s); |
| exit_status = 1; |
| } else if (*end) { |
| /* |
| if (s == end) |
| fprintf(stderr, "%s: expected numeric", s); |
| else |
| fprintf(stderr, "%s: not completely converted", s); |
| */ |
| exit_status = 1; |
| } |
| } |