X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fargmatch.c;h=964270650c2b72150ba8f1375c8857378dd5be16;hb=02461019940d8fa70f111461c823338a9d1284e4;hp=d632890a465596c22a8566fc6602d8b03b4ab52a;hpb=3af578d2e29267bfd7ac6bffdb18703602474a36;p=gnulib.git diff --git a/lib/argmatch.c b/lib/argmatch.c index d632890a4..964270650 100644 --- a/lib/argmatch.c +++ b/lib/argmatch.c @@ -1,5 +1,5 @@ /* argmatch.c -- find a match for a string in an array - Copyright (C) 1990 Free Software Foundation, Inc. + Copyright (C) 1990, 1998, 1999 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 @@ -12,35 +12,86 @@ 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + along with this program; if not, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -/* Written by David MacKenzie */ +/* Written by David MacKenzie + Modified by Akim Demaille */ -#ifdef HAVE_CONFIG_H -#include -#endif - -#include +#include "argmatch.h" #include #ifdef STDC_HEADERS -#include +# include +#endif + +#if HAVE_LOCALE_H +# include +#endif + +#if ENABLE_NLS +# include +# define _(Text) gettext (Text) +#else +# define _(Text) Text +#endif + +#include "error.h" +#include "quotearg.h" + +/* When reporting an invalid argument, show nonprinting characters + by using the quoting style ARGMATCH_QUOTING_STYLE. Do not use + literal_quoting_style. */ +#ifndef ARGMATCH_QUOTING_STYLE +# define ARGMATCH_QUOTING_STYLE locale_quoting_style #endif -extern char *program_name; +/* The following test is to work around the gross typo in + systems like Sony NEWS-OS Release 4.0C, whereby EXIT_FAILURE + is defined to 0, not 1. */ +#if !EXIT_FAILURE +# undef EXIT_FAILURE +# define EXIT_FAILURE 1 +#endif + +/* Non failing version of argmatch call this function after failing. */ +#ifndef ARGMATCH_DIE +# define ARGMATCH_DIE exit (EXIT_FAILURE) +#endif + +#ifdef ARGMATCH_DIE_DECL +ARGMATCH_DIE_DECL; +#endif + +static void +__argmatch_die (void) +{ + ARGMATCH_DIE; +} + +/* Used by XARGMATCH and XARGCASEMATCH. See description in argmatch.h. + Default to __argmatch_die, but allow caller to change this at run-time. */ +argmatch_exit_fn argmatch_die = __argmatch_die; + /* If ARG is an unambiguous match for an element of the - null-terminated array OPTLIST, return the index in OPTLIST + null-terminated array ARGLIST, return the index in ARGLIST of the matched element, else -1 if it does not match any element - or -2 if it is ambiguous (is a prefix of more than one element). */ + or -2 if it is ambiguous (is a prefix of more than one element). + If SENSITIVE, comparison is case sensitive. -int -argmatch (arg, optlist) - char *arg; - char **optlist; + If VALLIST is none null, use it to resolve ambiguities limited to + synonyms, i.e., for + "yes", "yop" -> 0 + "no", "nope" -> 1 + "y" is a valid argument, for `0', and "n" for `1'. */ + +static int +__argmatch_internal (const char *arg, const char *const *arglist, + const char *vallist, size_t valsize, + int case_sensitive) { - int i; /* Temporary index in OPTLIST. */ + int i; /* Temporary index in ARGLIST. */ size_t arglen; /* Length of ARG. */ int matchind = -1; /* Index of first nonexact match. */ int ambiguous = 0; /* If nonzero, multiple nonexact match(es). */ @@ -48,19 +99,30 @@ argmatch (arg, optlist) arglen = strlen (arg); /* Test all elements for either exact match or abbreviated matches. */ - for (i = 0; optlist[i]; i++) + for (i = 0; arglist[i]; i++) { - if (!strncmp (optlist[i], arg, arglen)) + if (case_sensitive + ? !strncmp (arglist[i], arg, arglen) + : !strncasecmp (arglist[i], arg, arglen)) { - if (strlen (optlist[i]) == arglen) + if (strlen (arglist[i]) == arglen) /* Exact match found. */ return i; else if (matchind == -1) /* First nonexact match found. */ matchind = i; else - /* Second nonexact match found. */ - ambiguous = 1; + { + /* Second nonexact match found. */ + if (vallist == NULL + || memcmp (vallist + valsize * matchind, + vallist + valsize * i, valsize)) + { + /* There is a real ambiguity, or we could not + disambiguate. */ + ambiguous = 1; + } + } } } if (ambiguous) @@ -69,21 +131,176 @@ argmatch (arg, optlist) return matchind; } +/* argmatch - case sensitive version */ +int +argmatch (const char *arg, const char *const *arglist, + const char *vallist, size_t valsize) +{ + return __argmatch_internal (arg, arglist, vallist, valsize, 1); +} + +/* argcasematch - case insensitive version */ +int +argcasematch (const char *arg, const char *const *arglist, + const char *vallist, size_t valsize) +{ + return __argmatch_internal (arg, arglist, vallist, valsize, 0); +} + /* Error reporting for argmatch. - KIND is a description of the type of entity that was being matched. + CONTEXT is a description of the type of entity that was being matched. VALUE is the invalid value that was given. PROBLEM is the return value from argmatch. */ void -invalid_arg (kind, value, problem) - char *kind; - char *value; - int problem; +argmatch_invalid (const char *context, const char *value, int problem) +{ + char const *format = (problem == -1 + ? _("invalid argument %s for `%s'") + : _("ambiguous argument %s for `%s'")); + + error (0, 0, format, quotearg_style (ARGMATCH_QUOTING_STYLE, value), context); +} + +/* List the valid arguments for argmatch. + ARGLIST is the same as in argmatch. + VALLIST is a pointer to an array of values. + VALSIZE is the size of the elements of VALLIST */ +void +argmatch_valid (const char *const *arglist, + const char *vallist, size_t valsize) { - fprintf (stderr, "%s: ", program_name); - if (problem == -1) - fprintf (stderr, "invalid"); - else /* Assume -2. */ - fprintf (stderr, "ambiguous"); - fprintf (stderr, " %s `%s'\n", kind, value); + int i; + const char *last_val = NULL; + + /* We try to put synonyms on the same line. The assumption is that + synonyms follow each other */ + fprintf (stderr, _("Valid arguments are:")); + for (i = 0; arglist[i]; i++) + if ((i == 0) + || memcmp (last_val, vallist + valsize * i, valsize)) + { + fprintf (stderr, "\n - `%s'", arglist[i]); + last_val = vallist + valsize * i; + } + else + { + fprintf (stderr, ", `%s'", arglist[i]); + } + putc ('\n', stderr); } + +/* Never failing versions of the previous functions. + + CONTEXT is the context for which argmatch is called (e.g., + "--version-control", or "$VERSION_CONTROL" etc.). Upon failure, + calls the (supposed never to return) function EXIT_FN. */ + +int +__xargmatch_internal (const char *context, + const char *arg, const char *const *arglist, + const char *vallist, size_t valsize, + int case_sensitive, + argmatch_exit_fn exit_fn) +{ + int res = __argmatch_internal (arg, arglist, + vallist, valsize, + case_sensitive); + if (res >= 0) + /* Success. */ + return res; + + /* We failed. Explain why. */ + argmatch_invalid (context, arg, res); + argmatch_valid (arglist, vallist, valsize); + (*exit_fn) (); + + return -1; /* To please the compilers. */ +} + +/* Look for VALUE in VALLIST, an array of objects of size VALSIZE and + return the first corresponding argument in ARGLIST */ +const char * +argmatch_to_argument (const char *value, + const char *const *arglist, + const char *vallist, size_t valsize) +{ + int i; + + for (i = 0; arglist[i]; i++) + if (!memcmp (value, vallist + valsize * i, valsize)) + return arglist[i]; + return NULL; +} + +#ifdef TEST +/* + * Based on "getversion.c" by David MacKenzie + */ +char *program_name; +extern const char *getenv (); + +/* When to make backup files. */ +enum backup_type +{ + /* Never make backups. */ + none, + + /* Make simple backups of every file. */ + simple, + + /* Make numbered backups of files that already have numbered backups, + and simple backups of the others. */ + numbered_existing, + + /* Make numbered backups of every file. */ + numbered +}; + +/* Two tables describing arguments (keys) and their corresponding + values */ +static const char *const backup_args[] = +{ + "no", "none", "off", + "simple", "never", + "existing", "nil", + "numbered", "t", + 0 +}; + +static const enum backup_type backup_vals[] = +{ + none, none, none, + simple, simple, + numbered_existing, numbered_existing, + numbered, numbered +}; + +int +main (int argc, const char *const *argv) +{ + const char *cp; + enum backup_type backup_type = none; + + program_name = (char *) argv[0]; + + if (argc > 2) + { + fprintf (stderr, "Usage: %s [VERSION_CONTROL]\n", program_name); + exit (1); + } + + if ((cp = getenv ("VERSION_CONTROL"))) + backup_type = XARGCASEMATCH ("$VERSION_CONTROL", cp, + backup_args, backup_vals); + + if (argc == 2) + backup_type = XARGCASEMATCH (program_name, argv[1], + backup_args, backup_vals); + + printf ("The version control is `%s'\n", + ARGMATCH_TO_ARGUMENT (backup_type, backup_args, backup_vals)); + + return 0; +} +#endif