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gnupg/common/argparse.c

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/* [argparse.c wk 17.06.97] Argument Parser for option handling
* Copyright (C) 1998, 1999, 2000, 2001, 2006
* 2007, 2008 Free Software Foundation, Inc.
*
* This file is part of JNLIB.
*
* JNLIB is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* JNLIB 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <stdarg.h>
#include "libjnlib-config.h"
#include "mischelp.h"
#include "stringhelp.h"
#include "logging.h"
#ifdef JNLIB_NEED_UTF8CONV
#include "utf8conv.h"
#endif
#include "argparse.h"
/*********************************
* @Summary arg_parse
* #include <wk/lib.h>
*
* typedef struct {
* char *argc; pointer to argc (value subject to change)
* char ***argv; pointer to argv (value subject to change)
* unsigned flags; Global flags (DO NOT CHANGE)
* int err; print error about last option
* 1 = warning, 2 = abort
* int r_opt; return option
* int r_type; type of return value (0 = no argument found)
* union {
* int ret_int;
* long ret_long
* ulong ret_ulong;
* char *ret_str;
* } r; Return values
* struct {
* int idx;
* const char *last;
* void *aliases;
* } internal; DO NOT CHANGE
* } ARGPARSE_ARGS;
*
* typedef struct {
* int short_opt;
* const char *long_opt;
* unsigned flags;
* } ARGPARSE_OPTS;
*
* int arg_parse( ARGPARSE_ARGS *arg, ARGPARSE_OPTS *opts );
*
* @Description
* This is my replacement for getopt(). See the example for a typical usage.
* Global flags are:
* Bit 0 : Do not remove options form argv
* Bit 1 : Do not stop at last option but return other args
* with r_opt set to -1.
* Bit 2 : Assume options and real args are mixed.
* Bit 3 : Do not use -- to stop option processing.
* Bit 4 : Do not skip the first arg.
* Bit 5 : allow usage of long option with only one dash
* Bit 6 : ignore --version
* all other bits must be set to zero, this value is modified by the
* function, so assume this is write only.
* Local flags (for each option):
* Bit 2-0 : 0 = does not take an argument
* 1 = takes int argument
* 2 = takes string argument
* 3 = takes long argument
* 4 = takes ulong argument
* Bit 3 : argument is optional (r_type will the be set to 0)
* Bit 4 : allow 0x etc. prefixed values.
* Bit 7 : this is a command and not an option
* You stop the option processing by setting opts to NULL, the function will
* then return 0.
* @Return Value
* Returns the args.r_opt or 0 if ready
* r_opt may be -2/-7 to indicate an unknown option/command.
* @See Also
* ArgExpand
* @Notes
* You do not need to process the options 'h', '--help' or '--version'
* because this function includes standard help processing; but if you
* specify '-h', '--help' or '--version' you have to do it yourself.
* The option '--' stops argument processing; if bit 1 is set the function
* continues to return normal arguments.
* To process float args or unsigned args you must use a string args and do
* the conversion yourself.
* @Example
*
* ARGPARSE_OPTS opts[] = {
* { 'v', "verbose", 0 },
* { 'd', "debug", 0 },
* { 'o', "output", 2 },
* { 'c', "cross-ref", 2|8 },
* { 'm', "my-option", 1|8 },
* { 500, "have-no-short-option-for-this-long-option", 0 },
* {0} };
* ARGPARSE_ARGS pargs = { &argc, &argv, 0 }
*
* while( ArgParse( &pargs, &opts) ) {
* switch( pargs.r_opt ) {
* case 'v': opt.verbose++; break;
* case 'd': opt.debug++; break;
* case 'o': opt.outfile = pargs.r.ret_str; break;
* case 'c': opt.crf = pargs.r_type? pargs.r.ret_str:"a.crf"; break;
* case 'm': opt.myopt = pargs.r_type? pargs.r.ret_int : 1; break;
* case 500: opt.a_long_one++; break
* default : pargs.err = 1; break; -- force warning output --
* }
* }
* if( argc > 1 )
* log_fatal( "Too many args");
*
*/
typedef struct alias_def_s *ALIAS_DEF;
struct alias_def_s {
ALIAS_DEF next;
char *name; /* malloced buffer with name, \0, value */
const char *value; /* ptr into name */
};
static const char *(*strusage_handler)( int ) = NULL;
static int (*custom_outfnc) (int, const char *);
static int set_opt_arg(ARGPARSE_ARGS *arg, unsigned flags, char *s);
static void show_help(ARGPARSE_OPTS *opts, unsigned flags);
static void show_version(void);
static int writestrings (int is_error, const char *string, ...)
#if __GNUC__ >= 4
__attribute__ ((sentinel(0)))
#endif
;
void
argparse_register_outfnc (int (*fnc)(int, const char *))
{
custom_outfnc = fnc;
}
/* Write STRING and all following const char * arguments either to
stdout or, if IS_ERROR is set, to stderr. The list of strings must
be terminated by a NULL. */
static int
writestrings (int is_error, const char *string, ...)
{
va_list arg_ptr;
const char *s;
int count = 0;
if (string)
{
s = string;
va_start (arg_ptr, string);
do
{
if (custom_outfnc)
custom_outfnc (is_error? 2:1, s);
else
fputs (s, is_error? stderr : stdout);
count += strlen (s);
}
while ((s = va_arg (arg_ptr, const char *)));
va_end (arg_ptr);
}
return count;
}
static void
flushstrings (int is_error)
{
if (custom_outfnc)
custom_outfnc (is_error? 2:1, NULL);
else
fflush (is_error? stderr : stdout);
}
static void
initialize( ARGPARSE_ARGS *arg, const char *filename, unsigned *lineno )
{
if( !(arg->flags & (1<<15)) )
{
/* Initialize this instance. */
arg->internal.idx = 0;
arg->internal.last = NULL;
arg->internal.inarg = 0;
arg->internal.stopped = 0;
arg->internal.aliases = NULL;
arg->internal.cur_alias = NULL;
arg->err = 0;
arg->flags |= 1<<15; /* Mark as initialized. */
if ( *arg->argc < 0 )
jnlib_log_bug ("invalid argument for arg_parsee\n");
}
if (arg->err)
{
/* Last option was erroneous. */
const char *s;
if (filename)
{
if ( arg->r_opt == ARGPARSE_UNEXPECTED_ARG )
s = _("argument not expected");
else if ( arg->r_opt == ARGPARSE_READ_ERROR )
s = _("read error");
else if ( arg->r_opt == ARGPARSE_KEYWORD_TOO_LONG )
s = _("keyword too long");
else if ( arg->r_opt == ARGPARSE_MISSING_ARG )
s = _("missing argument");
else if ( arg->r_opt == ARGPARSE_INVALID_COMMAND )
s = _("invalid command");
else if ( arg->r_opt == ARGPARSE_INVALID_ALIAS )
s = _("invalid alias definition");
else if ( arg->r_opt == ARGPARSE_OUT_OF_CORE )
s = _("out of core");
else
s = _("invalid option");
jnlib_log_error ("%s:%u: %s\n", filename, *lineno, s);
}
else
{
s = arg->internal.last? arg->internal.last:"[??]";
if ( arg->r_opt == ARGPARSE_MISSING_ARG )
jnlib_log_error (_("missing argument for option \"%.50s\"\n"), s);
else if ( arg->r_opt == ARGPARSE_UNEXPECTED_ARG )
jnlib_log_error (_("option \"%.50s\" does not expect an "
"argument\n"), s );
else if ( arg->r_opt == ARGPARSE_INVALID_COMMAND )
jnlib_log_error (_("invalid command \"%.50s\"\n"), s);
else if ( arg->r_opt == ARGPARSE_AMBIGUOUS_OPTION )
jnlib_log_error (_("option \"%.50s\" is ambiguous\n"), s);
else if ( arg->r_opt == ARGPARSE_AMBIGUOUS_OPTION )
jnlib_log_error (_("command \"%.50s\" is ambiguous\n"),s );
else if ( arg->r_opt == ARGPARSE_OUT_OF_CORE )
jnlib_log_error ("%s\n", _("out of core\n"));
else
jnlib_log_error (_("invalid option \"%.50s\"\n"), s);
}
if (arg->err != ARGPARSE_PRINT_WARNING)
exit (2);
arg->err = 0;
}
/* Zero out the return value union. */
arg->r.ret_str = NULL;
arg->r.ret_long = 0;
}
static void
store_alias( ARGPARSE_ARGS *arg, char *name, char *value )
{
/* TODO: replace this dummy function with a rea one
* and fix the probelms IRIX has with (ALIAS_DEV)arg..
* used as lvalue
*/
(void)arg;
(void)name;
(void)value;
#if 0
ALIAS_DEF a = jnlib_xmalloc( sizeof *a );
a->name = name;
a->value = value;
a->next = (ALIAS_DEF)arg->internal.aliases;
(ALIAS_DEF)arg->internal.aliases = a;
#endif
}
/****************
* Get options from a file.
* Lines starting with '#' are comment lines.
* Syntax is simply a keyword and the argument.
* Valid keywords are all keywords from the long_opt list without
* the leading dashes. The special keywords "help", "warranty" and "version"
* are not valid here.
* The special keyword "alias" may be used to store alias definitions,
* which are later expanded like long options.
* Caller must free returned strings.
* If called with FP set to NULL command line args are parse instead.
*
* Q: Should we allow the syntax
* keyword = value
* and accept for boolean options a value of 1/0, yes/no or true/false?
* Note: Abbreviation of options is here not allowed.
*/
int
optfile_parse (FILE *fp, const char *filename, unsigned *lineno,
ARGPARSE_ARGS *arg, ARGPARSE_OPTS *opts)
{
int state, i, c;
int idx=0;
char keyword[100];
char *buffer = NULL;
size_t buflen = 0;
int in_alias=0;
if (!fp) /* Divert to to arg_parse() in this case. */
return arg_parse (arg, opts);
initialize (arg, filename, lineno);
/* Find the next keyword. */
state = i = 0;
for (;;)
{
c = getc (fp);
if (c == '\n' || c== EOF )
{
if ( c != EOF )
++*lineno;
if (state == -1)
break;
else if (state == 2)
{
keyword[i] = 0;
for (i=0; opts[i].short_opt; i++ )
{
if (opts[i].long_opt && !strcmp (opts[i].long_opt, keyword))
break;
}
idx = i;
arg->r_opt = opts[idx].short_opt;
if (!opts[idx].short_opt )
arg->r_opt = ((opts[idx].flags & ARGPARSE_OPT_COMMAND)
? ARGPARSE_INVALID_COMMAND
: ARGPARSE_INVALID_OPTION);
else if (!(opts[idx].flags & 7))
arg->r_type = 0; /* Does not take an arg. */
else if ((opts[idx].flags & 8) )
arg->r_type = 0; /* Arg is optional. */
else
arg->r_opt = ARGPARSE_MISSING_ARG;
break;
}
else if (state == 3)
{
/* No argument found. */
if (in_alias)
arg->r_opt = ARGPARSE_MISSING_ARG;
else if (!(opts[idx].flags & 7))
arg->r_type = 0; /* Does not take an arg. */
else if ((opts[idx].flags & 8))
arg->r_type = 0; /* No optional argument. */
else
arg->r_opt = ARGPARSE_MISSING_ARG;
break;
}
else if (state == 4)
{
/* Has an argument. */
if (in_alias)
{
if (!buffer)
arg->r_opt = ARGPARSE_UNEXPECTED_ARG;
else
{
char *p;
buffer[i] = 0;
p = strpbrk (buffer, " \t");
if (p)
{
*p++ = 0;
trim_spaces (p);
}
if (!p || !*p)
{
jnlib_free (buffer);
arg->r_opt = ARGPARSE_INVALID_ALIAS;
}
else
{
store_alias (arg, buffer, p);
}
}
}
else if (!(opts[idx].flags & 7))
arg->r_opt = ARGPARSE_UNEXPECTED_ARG;
else
{
char *p;
if (!buffer)
{
keyword[i] = 0;
buffer = jnlib_strdup (keyword);
if (!buffer)
arg->r_opt = ARGPARSE_OUT_OF_CORE;
}
else
buffer[i] = 0;
if (buffer)
{
trim_spaces (buffer);
p = buffer;
if (*p == '"')
{
/* Remove quotes. */
p++;
if (*p && p[strlen(p)-1] == '\"' )
p[strlen(p)-1] = 0;
}
if (!set_opt_arg (arg, opts[idx].flags, p))
jnlib_free(buffer);
}
}
break;
}
else if (c == EOF)
{
if (ferror (fp))
arg->r_opt = ARGPARSE_READ_ERROR;
else
arg->r_opt = 0; /* EOF. */
break;
}
state = 0;
i = 0;
}
else if (state == -1)
; /* Skip. */
else if (state == 0 && isascii (c) && isspace(c))
; /* Skip leading white space. */
else if (state == 0 && c == '#' )
state = 1; /* Start of a comment. */
else if (state == 1)
; /* Skip comments. */
else if (state == 2 && isascii (c) && isspace(c))
{
/* Check keyword. */
keyword[i] = 0;
for (i=0; opts[i].short_opt; i++ )
if (opts[i].long_opt && !strcmp (opts[i].long_opt, keyword))
break;
idx = i;
arg->r_opt = opts[idx].short_opt;
if (!opts[idx].short_opt)
{
if (!strcmp (keyword, "alias"))
{
in_alias = 1;
state = 3;
}
else
{
arg->r_opt = ((opts[idx].flags & ARGPARSE_OPT_COMMAND)
? ARGPARSE_INVALID_COMMAND
: ARGPARSE_INVALID_OPTION);
state = -1; /* Skip rest of line and leave. */
}
}
else
state = 3;
}
else if (state == 3)
{
/* Skip leading spaces of the argument. */
if (!isascii (c) || !isspace(c))
{
i = 0;
keyword[i++] = c;
state = 4;
}
}
else if (state == 4)
{
/* Collect the argument. */
if (buffer)
{
if (i < buflen-1)
buffer[i++] = c;
else
{
char *tmp;
size_t tmplen = buflen + 50;
tmp = jnlib_realloc (buffer, tmplen);
if (tmp)
{
buflen = tmplen;
buffer = tmp;
buffer[i++] = c;
}
else
{
jnlib_free (buffer);
arg->r_opt = ARGPARSE_OUT_OF_CORE;
break;
}
}
}
else if (i < DIM(keyword)-1)
keyword[i++] = c;
else
{
size_t tmplen = DIM(keyword) + 50;
buffer = jnlib_malloc (tmplen);
if (buffer)
{
buflen = tmplen;
memcpy(buffer, keyword, i);
buffer[i++] = c;
}
else
{
arg->r_opt = ARGPARSE_OUT_OF_CORE;
break;
}
}
}
else if (i >= DIM(keyword)-1)
{
arg->r_opt = ARGPARSE_KEYWORD_TOO_LONG;
state = -1; /* Skip rest of line and leave. */
}
else
{
keyword[i++] = c;
state = 2;
}
}
return arg->r_opt;
}
static int
find_long_option( ARGPARSE_ARGS *arg,
ARGPARSE_OPTS *opts, const char *keyword )
{
int i;
size_t n;
(void)arg;
/* Would be better if we can do a binary search, but it is not
possible to reorder our option table because we would mess
up our help strings - What we can do is: Build a nice option
lookup table wehn this function is first invoked */
if( !*keyword )
return -1;
for(i=0; opts[i].short_opt; i++ )
if( opts[i].long_opt && !strcmp( opts[i].long_opt, keyword) )
return i;
#if 0
{
ALIAS_DEF a;
/* see whether it is an alias */
for( a = args->internal.aliases; a; a = a->next ) {
if( !strcmp( a->name, keyword) ) {
/* todo: must parse the alias here */
args->internal.cur_alias = a;
return -3; /* alias available */
}
}
}
#endif
/* not found, see whether it is an abbreviation */
/* aliases may not be abbreviated */
n = strlen( keyword );
for(i=0; opts[i].short_opt; i++ ) {
if( opts[i].long_opt && !strncmp( opts[i].long_opt, keyword, n ) ) {
int j;
for(j=i+1; opts[j].short_opt; j++ ) {
if( opts[j].long_opt
&& !strncmp( opts[j].long_opt, keyword, n ) )
return -2; /* abbreviation is ambiguous */
}
return i;
}
}
return -1;
}
int
arg_parse( ARGPARSE_ARGS *arg, ARGPARSE_OPTS *opts)
{
int idx;
int argc;
char **argv;
char *s, *s2;
int i;
initialize( arg, NULL, NULL );
argc = *arg->argc;
argv = *arg->argv;
idx = arg->internal.idx;
if (!idx && argc && !(arg->flags & ARGPARSE_FLAG_ARG0))
{
/* Skip the first argument. */
argc--; argv++; idx++;
}
next_one:
if (!argc)
{
/* No more args. */
arg->r_opt = 0;
goto leave; /* Ready. */
}
s = *argv;
arg->internal.last = s;
if (arg->internal.stopped && (arg->flags & ARGPARSE_FLAG_ALL))
{
arg->r_opt = ARGPARSE_IS_ARG; /* Not an option but an argument. */
arg->r_type = 2;
arg->r.ret_str = s;
argc--; argv++; idx++; /* set to next one */
}
else if( arg->internal.stopped )
{
arg->r_opt = 0;
goto leave; /* Ready. */
}
else if ( *s == '-' && s[1] == '-' )
{
/* Long option. */
char *argpos;
arg->internal.inarg = 0;
if (!s[2] && !(arg->flags & ARGPARSE_FLAG_NOSTOP))
{
/* Stop option processing. */
arg->internal.stopped = 1;
argc--; argv++; idx++;
goto next_one;
}
argpos = strchr( s+2, '=' );
if ( argpos )
*argpos = 0;
i = find_long_option ( arg, opts, s+2 );
if ( argpos )
*argpos = '=';
if ( i < 0 && !strcmp ( "help", s+2) )
show_help (opts, arg->flags);
else if ( i < 0 && !strcmp ( "version", s+2) )
{
if (!(arg->flags & ARGPARSE_FLAG_NOVERSION))
{
show_version ();
exit(0);
}
}
else if ( i < 0 && !strcmp( "warranty", s+2))
{
writestrings (0, strusage (16), "\n", NULL);
exit (0);
}
else if ( i < 0 && !strcmp( "dump-options", s+2) )
{
for (i=0; opts[i].short_opt; i++ )
{
if ( opts[i].long_opt )
writestrings (0, "--", opts[i].long_opt, "\n", NULL);
}
writestrings (0, "--dump-options\n--help\n--version\n--warranty\n",
NULL);
exit (0);
}
if ( i == -2 )
arg->r_opt = ARGPARSE_AMBIGUOUS_OPTION;
else if ( i == -1 )
{
arg->r_opt = ARGPARSE_INVALID_OPTION;
arg->r.ret_str = s+2;
}
else
arg->r_opt = opts[i].short_opt;
if ( i < 0 )
;
else if ( (opts[i].flags & 0x07) )
{
if ( argpos )
{
s2 = argpos+1;
if ( !*s2 )
s2 = NULL;
}
else
s2 = argv[1];
if ( !s2 && (opts[i].flags & ARGPARSE_OPT_OPTIONAL) )
{
arg->r_type = ARGPARSE_TYPE_NONE; /* Argument is optional. */
}
else if ( !s2 )
{
arg->r_opt = ARGPARSE_MISSING_ARG;
}
else if ( !argpos && *s2 == '-'
&& (opts[i].flags & ARGPARSE_OPT_OPTIONAL) )
{
/* The argument is optional and the next seems to be an
option. We do not check this possible option but
assume no argument */
arg->r_type = ARGPARSE_TYPE_NONE;
}
else
{
set_opt_arg (arg, opts[i].flags, s2);
if ( !argpos )
{
argc--; argv++; idx++; /* Skip one. */
}
}
}
else
{
/* Does not take an argument. */
if ( argpos )
arg->r_type = ARGPARSE_UNEXPECTED_ARG;
else
arg->r_type = 0;
}
argc--; argv++; idx++; /* Set to next one. */
}
else if ( (*s == '-' && s[1]) || arg->internal.inarg )
{
/* Short option. */
int dash_kludge = 0;
i = 0;
if ( !arg->internal.inarg )
{
arg->internal.inarg++;
if ( (arg->flags & ARGPARSE_FLAG_ONEDASH) )
{
for (i=0; opts[i].short_opt; i++ )
if ( opts[i].long_opt && !strcmp (opts[i].long_opt, s+1))
{
dash_kludge = 1;
break;
}
}
}
s += arg->internal.inarg;
if (!dash_kludge )
{
for (i=0; opts[i].short_opt; i++ )
if ( opts[i].short_opt == *s )
break;
}
if ( !opts[i].short_opt && ( *s == 'h' || *s == '?' ) )
show_help (opts, arg->flags);
arg->r_opt = opts[i].short_opt;
if (!opts[i].short_opt )
{
arg->r_opt = (opts[i].flags & ARGPARSE_OPT_COMMAND)?
ARGPARSE_INVALID_COMMAND:ARGPARSE_INVALID_OPTION;
arg->internal.inarg++; /* Point to the next arg. */
arg->r.ret_str = s;
}
else if ( (opts[i].flags & 7) )
{
if ( s[1] && !dash_kludge )
{
s2 = s+1;
set_opt_arg (arg, opts[i].flags, s2);
}
else
{
s2 = argv[1];
if ( !s2 && (opts[i].flags & ARGPARSE_OPT_OPTIONAL) )
{
arg->r_type = ARGPARSE_TYPE_NONE;
}
else if ( !s2 )
{
arg->r_opt = ARGPARSE_MISSING_ARG;
}
else if ( *s2 == '-' && s2[1]
&& (opts[i].flags & ARGPARSE_OPT_OPTIONAL) )
{
/* The argument is optional and the next seems to
be an option. We do not check this possible
option but assume no argument. */
arg->r_type = ARGPARSE_TYPE_NONE;
}
else
{
set_opt_arg (arg, opts[i].flags, s2);
argc--; argv++; idx++; /* Skip one. */
}
}
s = "x"; /* This is so that !s[1] yields false. */
}
else
{
/* Does not take an argument. */
arg->r_type = ARGPARSE_TYPE_NONE;
arg->internal.inarg++; /* Point to the next arg. */
}
if ( !s[1] || dash_kludge )
{
/* No more concatenated short options. */
arg->internal.inarg = 0;
argc--; argv++; idx++;
}
}
else if ( arg->flags & ARGPARSE_FLAG_MIXED )
{
arg->r_opt = ARGPARSE_IS_ARG;
arg->r_type = 2;
arg->r.ret_str = s;
argc--; argv++; idx++; /* Set to next one. */
}
else
{
arg->internal.stopped = 1; /* Stop option processing. */
goto next_one;
}
leave:
*arg->argc = argc;
*arg->argv = argv;
arg->internal.idx = idx;
return arg->r_opt;
}
static int
set_opt_arg(ARGPARSE_ARGS *arg, unsigned flags, char *s)
{
int base = (flags & 16)? 0 : 10;
switch ( (arg->r_type = (flags & 7)) )
{
case ARGPARSE_TYPE_INT:
arg->r.ret_int = (int)strtol(s,NULL,base);
return 0;
case ARGPARSE_TYPE_LONG:
arg->r.ret_long= strtol(s,NULL,base);
return 0;
case ARGPARSE_TYPE_ULONG:
arg->r.ret_ulong= strtoul(s,NULL,base);
return 0;
case ARGPARSE_TYPE_STRING:
default:
arg->r.ret_str = s;
return 1;
}
}
static size_t
long_opt_strlen( ARGPARSE_OPTS *o )
{
size_t n = strlen (o->long_opt);
if ( o->description && *o->description == '|' )
{
const char *s;
#ifdef JNLIB_NEED_UTF8CONV
int is_utf8 = is_native_utf8 ();
#endif
s=o->description+1;
if ( *s != '=' )
n++;
/* For a (mostly) correct length calculation we exclude
continuation bytes (10xxxxxx) if we are on a native utf8
terminal. */
for (; *s && *s != '|'; s++ )
#ifdef JNLIB_NEED_UTF8CONV
if ( is_utf8 && (*s&0xc0) != 0x80 )
#endif
n++;
}
return n;
}
/****************
* Print formatted help. The description string has some special
* meanings:
* - A description string which is "@" suppresses help output for
* this option
* - a description,ine which starts with a '@' and is followed by
* any other characters is printed as is; this may be used for examples
* ans such.
* - A description which starts with a '|' outputs the string between this
* bar and the next one as arguments of the long option.
*/
static void
show_help (ARGPARSE_OPTS *opts, unsigned int flags)
{
const char *s;
char tmp[2];
show_version ();
writestrings (0, "\n", NULL);
s = strusage(41);
writestrings (0, s, "\n", NULL);
if ( opts[0].description )
{
/* Auto format the option description. */
int i,j, indent;
/* Get max. length of long options. */
for (i=indent=0; opts[i].short_opt; i++ )
{
if ( opts[i].long_opt )
if ( !opts[i].description || *opts[i].description != '@' )
if ( (j=long_opt_strlen(opts+i)) > indent && j < 35 )
indent = j;
}
/* Example: " -v, --verbose Viele Sachen ausgeben" */
indent += 10;
if ( *opts[0].description != '@' )
writestrings (0, "Options:", "\n", NULL);
for (i=0; opts[i].short_opt; i++ )
{
s = _( opts[i].description );
if ( s && *s== '@' && !s[1] ) /* Hide this line. */
continue;
if ( s && *s == '@' ) /* Unindented comment only line. */
{
for (s++; *s; s++ )
{
if ( *s == '\n' )
{
if( s[1] )
writestrings (0, "\n", NULL);
}
else
{
tmp[0] = *s;
tmp[1] = 0;
writestrings (0, tmp, NULL);
}
}
writestrings (0, "\n", NULL);
continue;
}
j = 3;
if ( opts[i].short_opt < 256 )
{
tmp[0] = opts[i].short_opt;
tmp[1] = 0;
writestrings (0, " -", tmp, NULL );
if ( !opts[i].long_opt )
{
if (s && *s == '|' )
{
writestrings (0, " ", NULL); j++;
for (s++ ; *s && *s != '|'; s++, j++ )
{
tmp[0] = *s;
tmp[1] = 0;
writestrings (0, tmp, NULL);
}
if ( *s )
s++;
}
}
}
else
writestrings (0, " ", NULL);
if ( opts[i].long_opt )
{
tmp[0] = opts[i].short_opt < 256?',':' ';
tmp[1] = 0;
j += writestrings (0, tmp, " --", opts[i].long_opt, NULL);
if (s && *s == '|' )
{
if ( *++s != '=' )
{
writestrings (0, " ", NULL);
j++;
}
for ( ; *s && *s != '|'; s++, j++ )
{
tmp[0] = *s;
tmp[1] = 0;
writestrings (0, tmp, NULL);
}
if ( *s )
s++;
}
writestrings (0, " ", NULL);
j += 3;
}
for (;j < indent; j++ )
writestrings (0, " ", NULL);
if ( s )
{
if ( *s && j > indent )
{
writestrings (0, "\n", NULL);
for (j=0;j < indent; j++ )
writestrings (0, " ", NULL);
}
for (; *s; s++ )
{
if ( *s == '\n' )
{
if ( s[1] )
{
writestrings (0, "\n", NULL);
for (j=0; j < indent; j++ )
writestrings (0, " ", NULL);
}
}
else
{
tmp[0] = *s;
tmp[1] = 0;
writestrings (0, tmp, NULL);
}
}
}
writestrings (0, "\n", NULL);
}
if ( (flags & ARGPARSE_FLAG_ONEDASH) )
writestrings (0, "\n(A single dash may be used "
"instead of the double ones)\n", NULL);
}
if ( (s=strusage(19)) )
{
/* bug reports to ... */
char *s2;
writestrings (0, "\n", NULL);
s2 = strstr (s, "@EMAIL@");
if (s2)
{
if (s2-s)
{
const char *s3;
for (s3=s; s3 < s2; s3++)
{
tmp[0] = *s3;
tmp[1] = 0;
writestrings (0, tmp, NULL);
}
}
#ifdef PACKAGE_BUGREPORT
writestrings (0, PACKAGE_BUGREPORT, NULL);
#else
writestrings (0, "bug@example.org", NULL);
#endif
s2 += 7;
if (*s2)
writestrings (0, s2, NULL);
}
else
writestrings (0, s, NULL);
}
flushstrings (0);
exit(0);
}
static void
show_version ()
{
const char *s;
int i;
/* Version line. */
writestrings (0, strusage (11), NULL);
if ((s=strusage (12)))
writestrings (0, " (", s, ")", NULL);
writestrings (0, " ", strusage (13), "\n", NULL);
/* Additional version lines. */
for (i=20; i < 30; i++)
if ((s=strusage (i)))
writestrings (0, s, "\n", NULL);
/* Copyright string. */
if ((s=strusage (14)))
writestrings (0, s, "\n", NULL);
/* Licence string. */
if( (s=strusage (10)) )
writestrings (0, s, "\n", NULL);
/* Copying conditions. */
if ( (s=strusage(15)) )
writestrings (0, s, NULL);
/* Thanks. */
if ((s=strusage(18)))
writestrings (0, s, NULL);
/* Additional program info. */
for (i=30; i < 40; i++ )
if ( (s=strusage (i)) )
writestrings (0, s, NULL);
flushstrings (0);
}
void
usage (int level)
{
const char *p;
if (!level)
{
writestrings (1, strusage(11), " ", strusage(13), "; ",
strusage (14), "\n", NULL);
flushstrings (1);
}
else if (level == 1)
{
p = strusage (40);
writestrings (1, p, NULL);
if (*p && p[strlen(p)] != '\n')
writestrings (1, "\n", NULL);
exit (2);
}
else if (level == 2)
{
writestrings (0, strusage(41), "\n", NULL);
exit (0);
}
}
/* Level
* 0: Print copyright string to stderr
* 1: Print a short usage hint to stderr and terminate
* 2: Print a long usage hint to stdout and terminate
* 10: Return license info string
* 11: Return the name of the program
* 12: Return optional name of package which includes this program.
* 13: version string
* 14: copyright string
* 15: Short copying conditions (with LFs)
* 16: Long copying conditions (with LFs)
* 17: Optional printable OS name
* 18: Optional thanks list (with LFs)
* 19: Bug report info
*20..29: Additional lib version strings.
*30..39: Additional program info (with LFs)
* 40: short usage note (with LF)
* 41: long usage note (with LF)
*/
const char *
strusage( int level )
{
const char *p = strusage_handler? strusage_handler(level) : NULL;
if ( p )
return p;
switch ( level )
{
case 10: p = ("License GPLv3+: GNU GPL version 3 or later "
"<http://gnu.org/licenses/gpl.html>");
break;
case 11: p = "foo"; break;
case 13: p = "0.0"; break;
case 14: p = "Copyright (C) 2011 Free Software Foundation, Inc."; break;
case 15: p =
"This is free software: you are free to change and redistribute it.\n"
"There is NO WARRANTY, to the extent permitted by law.\n";
break;
case 16: p =
"This is free software; you can redistribute it and/or modify\n"
"it under the terms of the GNU General Public License as published by\n"
"the Free Software Foundation; either version 3 of the License, or\n"
"(at your option) any later version.\n\n"
"It is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
"GNU General Public License for more details.\n\n"
"You should have received a copy of the GNU General Public License\n"
"along with this software. If not, see <http://www.gnu.org/licenses/>.\n";
break;
case 40: /* short and long usage */
case 41: p = ""; break;
}
return p;
}
/* Set the usage handler. This function is basically a constructor. */
void
set_strusage ( const char *(*f)( int ) )
{
strusage_handler = f;
}
#ifdef TEST
static struct {
int verbose;
int debug;
char *outfile;
char *crf;
int myopt;
int echo;
int a_long_one;
}opt;
int
main(int argc, char **argv)
{
ARGPARSE_OPTS opts[] = {
ARGPARSE_x('v', "verbose", NONE, 0, "Laut sein"),
ARGPARSE_s_n('e', "echo" , ("Zeile ausgeben, damit wir sehen, "
"was wir ein gegeben haben")),
ARGPARSE_s_n('d', "debug", "Debug\nfalls mal etwas\nschief geht"),
ARGPARSE_s_s('o', "output", 0 ),
ARGPARSE_o_s('c', "cross-ref", "cross-reference erzeugen\n" ),
/* Note that on a non-utf8 terminal the ß might garble the output. */
ARGPARSE_s_n('s', "street","|Straße|set the name of the street to Straße"),
ARGPARSE_o_i('m', "my-option", 0),
ARGPARSE_s_n(500, "a-long-option", 0 ),
ARGPARSE_end
};
ARGPARSE_ARGS pargs = { &argc, &argv, 2|4|32 };
int i;
while( arg_parse ( &pargs, opts) ) {
switch( pargs.r_opt ) {
case -1 : printf( "arg=`%s'\n", pargs.r.ret_str); break;
case 'v': opt.verbose++; break;
case 'e': opt.echo++; break;
case 'd': opt.debug++; break;
case 'o': opt.outfile = pargs.r.ret_str; break;
case 'c': opt.crf = pargs.r_type? pargs.r.ret_str:"a.crf"; break;
case 'm': opt.myopt = pargs.r_type? pargs.r.ret_int : 1; break;
case 500: opt.a_long_one++; break;
default : pargs.err = ARGPARSE_PRINT_WARNING; break;
}
}
for(i=0; i < argc; i++ )
printf("%3d -> (%s)\n", i, argv[i] );
puts("Options:");
if( opt.verbose )
printf(" verbose=%d\n", opt.verbose );
if( opt.debug )
printf(" debug=%d\n", opt.debug );
if( opt.outfile )
printf(" outfile=`%s'\n", opt.outfile );
if( opt.crf )
printf(" crffile=`%s'\n", opt.crf );
if( opt.myopt )
printf(" myopt=%d\n", opt.myopt );
if( opt.a_long_one )
printf(" a-long-one=%d\n", opt.a_long_one );
if( opt.echo )
printf(" echo=%d\n", opt.echo );
return 0;
}
#endif
/**** bottom of file ****/
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