X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgetopt.c;h=654f7615989466bdb925378ee578dea608f9bd56;hb=8d2f9f58a034951c99ca4f426764e14f55155369;hp=2f1e6d8d7a123027c25c1a141eacbc74b5c0026e;hpb=94c2b3081afc60341285f21eeaa07f4e20ed37af;p=gnulib.git diff --git a/lib/getopt.c b/lib/getopt.c index 2f1e6d8d7..654f76159 100644 --- a/lib/getopt.c +++ b/lib/getopt.c @@ -3,7 +3,7 @@ "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu before changing it! - Copyright (C) 1987, 88, 89, 90, 91, 92, 1993 + Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it @@ -20,10 +20,8 @@ along with this program; if not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ -/* - * This tells Alpha OSF/1 not to define a getopt prototype in . - * Ditto for AIX 3.2 and . - */ +/* This tells Alpha OSF/1 not to define a getopt prototype in . + Ditto for AIX 3.2 and . */ #ifndef _NO_PROTO #define _NO_PROTO #endif @@ -68,11 +66,6 @@ #include #endif /* GNU C library. */ -/* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a - long-named option. Because this is not POSIX.2 compliant, it is - being phased out. */ -/* #define GETOPT_COMPAT */ - /* This version of `getopt' appears to the caller like standard Unix `getopt' but it behaves differently for the user, since it allows the user to intersperse the options with the other arguments. @@ -95,7 +88,7 @@ Also, when `ordering' is RETURN_IN_ORDER, each non-option ARGV-element is returned here. */ -char *optarg = 0; +char *optarg = NULL; /* Index in ARGV of the next element to be scanned. This is used for communication to and from the caller @@ -195,19 +188,18 @@ my_index (str, chr) } /* If using GCC, we can safely declare strlen this way. - If not using GCC, it is ok not to declare it. - (Supposedly there are some machines where it might get a warning, - but changing this conditional to __STDC__ is too risky.) */ + If not using GCC, it is ok not to declare it. */ #ifdef __GNUC__ -#ifdef IN_GCC -#include "gstddef.h" -#else -#include -#endif -extern size_t strlen (const char *); -#endif +/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. + That was relevant to code that was here before. */ +#ifndef __STDC__ +/* gcc with -traditional declares the built-in strlen to return int, + and has done so at least since version 2.4.5. -- rms. */ +extern int strlen (const char *); +#endif /* not __STDC__ */ +#endif /* __GNUC__ */ -#endif /* GNU C library. */ +#endif /* not __GNU_LIBRARY__ */ /* Handle permutation of arguments. */ @@ -282,6 +274,40 @@ exchange (argv) first_nonopt += (optind - last_nonopt); last_nonopt = optind; } + +/* Initialize the internal data when the first call is made. */ + +static const char * +_getopt_initialize (optstring) + const char *optstring; +{ + /* Start processing options with ARGV-element 1 (since ARGV-element 0 + is the program name); the sequence of previously skipped + non-option ARGV-elements is empty. */ + + first_nonopt = last_nonopt = optind = 1; + + nextchar = NULL; + + /* Determine how to handle the ordering of options and nonoptions. */ + + if (optstring[0] == '-') + { + ordering = RETURN_IN_ORDER; + ++optstring; + } + else if (optstring[0] == '+') + { + ordering = REQUIRE_ORDER; + ++optstring; + } + else if (getenv ("POSIXLY_CORRECT") != NULL) + ordering = REQUIRE_ORDER; + else + ordering = PERMUTE; + + return optstring; +} /* Scan elements of ARGV (whose length is ARGC) for option characters given in OPTSTRING. @@ -348,41 +374,15 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) int *longind; int long_only; { - int option_index; - - optarg = 0; - - /* Initialize the internal data when the first call is made. - Start processing options with ARGV-element 1 (since ARGV-element 0 - is the program name); the sequence of previously skipped - non-option ARGV-elements is empty. */ + optarg = NULL; if (optind == 0) - { - first_nonopt = last_nonopt = optind = 1; - - nextchar = NULL; - - /* Determine how to handle the ordering of options and nonoptions. */ - - if (optstring[0] == '-') - { - ordering = RETURN_IN_ORDER; - ++optstring; - } - else if (optstring[0] == '+') - { - ordering = REQUIRE_ORDER; - ++optstring; - } - else if (getenv ("POSIXLY_CORRECT") != NULL) - ordering = REQUIRE_ORDER; - else - ordering = PERMUTE; - } + optstring = _getopt_initialize (optstring); if (nextchar == NULL || *nextchar == '\0') { + /* Advance to the next ARGV-element. */ + if (ordering == PERMUTE) { /* If we have just processed some options following some non-options, @@ -393,21 +393,16 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) else if (last_nonopt != optind) first_nonopt = optind; - /* Now skip any additional non-options + /* Skip any additional non-options and extend the range of non-options previously skipped. */ while (optind < argc - && (argv[optind][0] != '-' || argv[optind][1] == '\0') -#ifdef GETOPT_COMPAT - && (longopts == NULL - || argv[optind][0] != '+' || argv[optind][1] == '\0') -#endif /* GETOPT_COMPAT */ - ) + && (argv[optind][0] != '-' || argv[optind][1] == '\0')) optind++; last_nonopt = optind; } - /* Special ARGV-element `--' means premature end of options. + /* The special ARGV-element `--' means premature end of options. Skip it like a null option, then exchange with previous non-options as if it were an option, then skip everything else like a non-option. */ @@ -440,12 +435,7 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) /* If we have come to a non-option and did not permute it, either stop the scan or describe it to the caller and pass it by. */ - if ((argv[optind][0] != '-' || argv[optind][1] == '\0') -#ifdef GETOPT_COMPAT - && (longopts == NULL - || argv[optind][0] != '+' || argv[optind][1] == '\0') -#endif /* GETOPT_COMPAT */ - ) + if ((argv[optind][0] != '-' || argv[optind][1] == '\0')) { if (ordering == REQUIRE_ORDER) return EOF; @@ -454,36 +444,48 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) } /* We have found another option-ARGV-element. - Start decoding its characters. */ + Skip the initial punctuation. */ nextchar = (argv[optind] + 1 + (longopts != NULL && argv[optind][1] == '-')); } + /* Decode the current option-ARGV-element. */ + + /* Check whether the ARGV-element is a long option. + + If long_only and the ARGV-element has the form "-f", where f is + a valid short option, don't consider it an abbreviated form of + a long option that starts with f. Otherwise there would be no + way to give the -f short option. + + On the other hand, if there's a long option "fubar" and + the ARGV-element is "-fu", do consider that an abbreviation of + the long option, just like "--fu", and not "-f" with arg "u". + + This distinction seems to be the most useful approach. */ + if (longopts != NULL - && ((argv[optind][0] == '-' - && (argv[optind][1] == '-' || long_only)) -#ifdef GETOPT_COMPAT - || argv[optind][0] == '+' -#endif /* GETOPT_COMPAT */ - )) + && (argv[optind][1] == '-' + || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) { + char *nameend; const struct option *p; - char *s = nextchar; + const struct option *pfound = NULL; int exact = 0; int ambig = 0; - const struct option *pfound = NULL; int indfound; + int option_index; - while (*s && *s != '=') - s++; + for (nameend = nextchar; *nameend && *nameend != '='; nameend++) + /* Do nothing. */ ; - /* Test all options for either exact match or abbreviated matches. */ - for (p = longopts, option_index = 0; p->name; - p++, option_index++) - if (!strncmp (p->name, nextchar, s - nextchar)) + /* Test all long options for either exact match + or abbreviated matches. */ + for (p = longopts, option_index = 0; p->name; p++, option_index++) + if (!strncmp (p->name, nextchar, nameend - nextchar)) { - if (s - nextchar == strlen (p->name)) + if (nameend - nextchar == strlen (p->name)) { /* Exact match found. */ pfound = p; @@ -498,7 +500,7 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) indfound = option_index; } else - /* Second nonexact match found. */ + /* Second or later nonexact match found. */ ambig = 1; } @@ -516,12 +518,12 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) { option_index = indfound; optind++; - if (*s) + if (*nameend) { /* Don't test has_arg with >, because some C compilers don't allow it to be used on enums. */ if (pfound->has_arg) - optarg = s + 1; + optarg = nameend + 1; else { if (opterr) @@ -564,14 +566,12 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) } return pfound->val; } + /* Can't find it as a long option. If this is not getopt_long_only, or the option starts with '--' or is not a valid short option, then it's an error. Otherwise interpret it as a short option. */ if (!long_only || argv[optind][1] == '-' -#ifdef GETOPT_COMPAT - || argv[optind][0] == '+' -#endif /* GETOPT_COMPAT */ || my_index (optstring, *nextchar) == NULL) { if (opterr) @@ -591,7 +591,7 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) } } - /* Look at and handle the next option-character. */ + /* Look at and handle the next short option-character. */ { char c = *nextchar++; @@ -605,16 +605,8 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) { if (opterr) { -#if 0 - if (c < 040 || c >= 0177) - fprintf (stderr, "%s: unrecognized option, character code 0%o\n", - argv[0], c); - else - fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c); -#else /* 1003.2 specifies the format of this message. */ fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); -#endif } optopt = c; return '?'; @@ -630,7 +622,7 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) optind++; } else - optarg = 0; + optarg = NULL; nextchar = NULL; } else @@ -647,14 +639,9 @@ _getopt_internal (argc, argv, optstring, longopts, longind, long_only) { if (opterr) { -#if 0 - fprintf (stderr, "%s: option `-%c' requires an argument\n", - argv[0], c); -#else /* 1003.2 specifies the format of this message. */ fprintf (stderr, "%s: option requires an argument -- %c\n", argv[0], c); -#endif } optopt = c; if (optstring[0] == ':')