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esp-idf/components/console/argtable3/argtable3.c

1112 wiersze
38 KiB
C
Czysty Wina Historia

/*
* SPDX-FileCopyrightText: 1998-2001,2003-2011,2013 Stewart Heitmann
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/*******************************************************************************
* argtable3: Implements the main interfaces of the library
*
* This file is part of the argtable3 library.
*
* Copyright (C) 1998-2001,2003-2011,2013 Stewart Heitmann
* <sheitmann@users.sourceforge.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of STEWART HEITMANN nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL STEWART HEITMANN BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
#include "argtable3.h"
#ifndef ARG_AMALGAMATION
#include "argtable3_private.h"
#if ARG_REPLACE_GETOPT == 1
#include "arg_getopt.h"
#else
#include <getopt.h>
#endif
#else
#if ARG_REPLACE_GETOPT == 0
#include <getopt.h>
#endif
#endif
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#endif
#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
static void arg_register_error(struct arg_end* end, void* parent, int error, const char* argval) {
/* printf("arg_register_error(%p,%p,%d,%s)\n",end,parent,error,argval); */
if (end->count < end->hdr.maxcount) {
end->error[end->count] = error;
end->parent[end->count] = parent;
end->argval[end->count] = argval;
end->count++;
} else {
end->error[end->hdr.maxcount - 1] = ARG_ELIMIT;
end->parent[end->hdr.maxcount - 1] = end;
end->argval[end->hdr.maxcount - 1] = NULL;
}
}
/*
* Return index of first table entry with a matching short option
* or -1 if no match was found.
*/
static int find_shortoption(struct arg_hdr** table, char shortopt) {
int tabindex;
for (tabindex = 0; !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
if (table[tabindex]->shortopts && strchr(table[tabindex]->shortopts, shortopt))
return tabindex;
}
return -1;
}
struct longoptions {
int getoptval;
int noptions;
struct option* options;
};
#if 0
static
void dump_longoptions(struct longoptions * longoptions)
{
int i;
printf("getoptval = %d\n", longoptions->getoptval);
printf("noptions = %d\n", longoptions->noptions);
for (i = 0; i < longoptions->noptions; i++)
{
printf("options[%d].name = \"%s\"\n",
i,
longoptions->options[i].name);
printf("options[%d].has_arg = %d\n", i, longoptions->options[i].has_arg);
printf("options[%d].flag = %p\n", i, longoptions->options[i].flag);
printf("options[%d].val = %d\n", i, longoptions->options[i].val);
}
}
#endif
static struct longoptions* alloc_longoptions(struct arg_hdr** table) {
struct longoptions* result;
size_t nbytes;
int noptions = 1;
size_t longoptlen = 0;
int tabindex;
int option_index = 0;
char* store;
/*
* Determine the total number of option structs required
* by counting the number of comma separated long options
* in all table entries and return the count in noptions.
* note: noptions starts at 1 not 0 because we getoptlong
* requires a NULL option entry to terminate the option array.
* While we are at it, count the number of chars required
* to store private copies of all the longoption strings
* and return that count in logoptlen.
*/
tabindex = 0;
do {
const char* longopts = table[tabindex]->longopts;
longoptlen += (longopts ? strlen(longopts) : 0) + 1;
while (longopts) {
noptions++;
longopts = strchr(longopts + 1, ',');
}
} while (!(table[tabindex++]->flag & ARG_TERMINATOR));
/*printf("%d long options consuming %d chars in total\n",noptions,longoptlen);*/
/* allocate storage for return data structure as: */
/* (struct longoptions) + (struct options)[noptions] + char[longoptlen] */
nbytes = sizeof(struct longoptions) + sizeof(struct option) * (size_t)noptions + longoptlen;
result = (struct longoptions*)xmalloc(nbytes);
result->getoptval = 0;
result->noptions = noptions;
result->options = (struct option*)(result + 1);
store = (char*)(result->options + noptions);
for (tabindex = 0; !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
const char* longopts = table[tabindex]->longopts;
while (longopts && *longopts) {
char* storestart = store;
/* copy progressive longopt strings into the store */
while (*longopts != 0 && *longopts != ',')
*store++ = *longopts++;
*store++ = 0;
if (*longopts == ',')
longopts++;
/*fprintf(stderr,"storestart=\"%s\"\n",storestart);*/
result->options[option_index].name = storestart;
result->options[option_index].flag = &(result->getoptval);
result->options[option_index].val = tabindex;
if (table[tabindex]->flag & ARG_HASOPTVALUE)
result->options[option_index].has_arg = 2;
else if (table[tabindex]->flag & ARG_HASVALUE)
result->options[option_index].has_arg = 1;
else
result->options[option_index].has_arg = 0;
option_index++;
}
}
/* terminate the options array with a zero-filled entry */
result->options[option_index].name = 0;
result->options[option_index].has_arg = 0;
result->options[option_index].flag = 0;
result->options[option_index].val = 0;
/*dump_longoptions(result);*/
return result;
}
static char* alloc_shortoptions(struct arg_hdr** table) {
char* result;
size_t len = 2;
int tabindex;
char* res;
/* determine the total number of option chars required */
for (tabindex = 0; !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
struct arg_hdr* hdr = table[tabindex];
len += 3 * (hdr->shortopts ? strlen(hdr->shortopts) : 0);
}
result = xmalloc(len);
res = result;
/* add a leading ':' so getopt return codes distinguish */
/* unrecognised option and options missing argument values */
*res++ = ':';
for (tabindex = 0; !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
struct arg_hdr* hdr = table[tabindex];
const char* shortopts = hdr->shortopts;
while (shortopts && *shortopts) {
*res++ = *shortopts++;
if (hdr->flag & ARG_HASVALUE)
*res++ = ':';
if (hdr->flag & ARG_HASOPTVALUE)
*res++ = ':';
}
}
/* null terminate the string */
*res = 0;
/*printf("alloc_shortoptions() returns \"%s\"\n",(result?result:"NULL"));*/
return result;
}
/* return index of the table terminator entry */
static int arg_endindex(struct arg_hdr** table) {
int tabindex = 0;
while (!(table[tabindex]->flag & ARG_TERMINATOR))
tabindex++;
return tabindex;
}
static void arg_parse_tagged(int argc, char** argv, struct arg_hdr** table, struct arg_end* endtable) {
struct longoptions* longoptions;
char* shortoptions;
int copt;
/*printf("arg_parse_tagged(%d,%p,%p,%p)\n",argc,argv,table,endtable);*/
/* allocate short and long option arrays for the given opttable[]. */
/* if the allocs fail then put an error msg in the last table entry. */
longoptions = alloc_longoptions(table);
shortoptions = alloc_shortoptions(table);
/*dump_longoptions(longoptions);*/
/* reset getopts internal option-index to zero, and disable error reporting */
optind = 0;
opterr = 0;
/* fetch and process args using getopt_long */
#ifdef ARG_LONG_ONLY
while ((copt = getopt_long_only(argc, argv, shortoptions, longoptions->options, NULL)) != -1) {
#else
while ((copt = getopt_long(argc, argv, shortoptions, longoptions->options, NULL)) != -1) {
#endif
/*
printf("optarg='%s'\n",optarg);
printf("optind=%d\n",optind);
printf("copt=%c\n",(char)copt);
printf("optopt=%c (%d)\n",optopt, (int)(optopt));
*/
switch (copt) {
case 0: {
int tabindex = longoptions->getoptval;
void* parent = table[tabindex]->parent;
/*printf("long option detected from argtable[%d]\n", tabindex);*/
if (optarg && optarg[0] == 0 && (table[tabindex]->flag & ARG_HASVALUE)) {
/* printf(": long option %s requires an argument\n",argv[optind-1]); */
arg_register_error(endtable, endtable, ARG_EMISSARG, argv[optind - 1]);
/* continue to scan the (empty) argument value to enforce argument count checking */
}
if (table[tabindex]->scanfn) {
int errorcode = table[tabindex]->scanfn(parent, optarg);
if (errorcode != 0)
arg_register_error(endtable, parent, errorcode, optarg);
}
} break;
case '?':
/*
* getopt_long() found an unrecognised short option.
* if it was a short option its value is in optopt
* if it was a long option then optopt=0
*/
switch (optopt) {
case 0:
/*printf("?0 unrecognised long option %s\n",argv[optind-1]);*/
arg_register_error(endtable, endtable, ARG_ELONGOPT, argv[optind - 1]);
break;
default:
/*printf("?* unrecognised short option '%c'\n",optopt);*/
arg_register_error(endtable, endtable, optopt, NULL);
break;
}
break;
case ':':
/*
* getopt_long() found an option with its argument missing.
*/
/*printf(": option %s requires an argument\n",argv[optind-1]); */
arg_register_error(endtable, endtable, ARG_EMISSARG, argv[optind - 1]);
break;
default: {
/* getopt_long() found a valid short option */
int tabindex = find_shortoption(table, (char)copt);
/*printf("short option detected from argtable[%d]\n", tabindex);*/
if (tabindex == -1) {
/* should never get here - but handle it just in case */
/*printf("unrecognised short option %d\n",copt);*/
arg_register_error(endtable, endtable, copt, NULL);
} else {
if (table[tabindex]->scanfn) {
void* parent = table[tabindex]->parent;
int errorcode = table[tabindex]->scanfn(parent, optarg);
if (errorcode != 0)
arg_register_error(endtable, parent, errorcode, optarg);
}
}
break;
}
}
}
xfree(shortoptions);
xfree(longoptions);
}
static void arg_parse_untagged(int argc, char** argv, struct arg_hdr** table, struct arg_end* endtable) {
int tabindex = 0;
int errorlast = 0;
const char* optarglast = NULL;
void* parentlast = NULL;
/*printf("arg_parse_untagged(%d,%p,%p,%p)\n",argc,argv,table,endtable);*/
while (!(table[tabindex]->flag & ARG_TERMINATOR)) {
void* parent;
int errorcode;
/* if we have exhausted our argv[optind] entries then we have finished */
if (optind >= argc) {
/*printf("arg_parse_untagged(): argv[] exhausted\n");*/
return;
}
/* skip table entries with non-null long or short options (they are not untagged entries) */
if (table[tabindex]->longopts || table[tabindex]->shortopts) {
/*printf("arg_parse_untagged(): skipping argtable[%d] (tagged argument)\n",tabindex);*/
tabindex++;
continue;
}
/* skip table entries with NULL scanfn */
if (!(table[tabindex]->scanfn)) {
/*printf("arg_parse_untagged(): skipping argtable[%d] (NULL scanfn)\n",tabindex);*/
tabindex++;
continue;
}
/* attempt to scan the current argv[optind] with the current */
/* table[tabindex] entry. If it succeeds then keep it, otherwise */
/* try again with the next table[] entry. */
parent = table[tabindex]->parent;
errorcode = table[tabindex]->scanfn(parent, argv[optind]);
if (errorcode == 0) {
/* success, move onto next argv[optind] but stay with same table[tabindex] */
/*printf("arg_parse_untagged(): argtable[%d] successfully matched\n",tabindex);*/
optind++;
/* clear the last tentative error */
errorlast = 0;
} else {
/* failure, try same argv[optind] with next table[tabindex] entry */
/*printf("arg_parse_untagged(): argtable[%d] failed match\n",tabindex);*/
tabindex++;
/* remember this as a tentative error we may wish to reinstate later */
errorlast = errorcode;
optarglast = argv[optind];
parentlast = parent;
}
}
/* if a tenative error still remains at this point then register it as a proper error */
if (errorlast) {
arg_register_error(endtable, parentlast, errorlast, optarglast);
optind++;
}
/* only get here when not all argv[] entries were consumed */
/* register an error for each unused argv[] entry */
while (optind < argc) {
/*printf("arg_parse_untagged(): argv[%d]=\"%s\" not consumed\n",optind,argv[optind]);*/
arg_register_error(endtable, endtable, ARG_ENOMATCH, argv[optind++]);
}
return;
}
static void arg_parse_check(struct arg_hdr** table, struct arg_end* endtable) {
int tabindex = 0;
/* printf("arg_parse_check()\n"); */
do {
if (table[tabindex]->checkfn) {
void* parent = table[tabindex]->parent;
int errorcode = table[tabindex]->checkfn(parent);
if (errorcode != 0)
arg_register_error(endtable, parent, errorcode, NULL);
}
} while (!(table[tabindex++]->flag & ARG_TERMINATOR));
}
static void arg_reset(void** argtable) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int tabindex = 0;
/*printf("arg_reset(%p)\n",argtable);*/
do {
if (table[tabindex]->resetfn)
table[tabindex]->resetfn(table[tabindex]->parent);
} while (!(table[tabindex++]->flag & ARG_TERMINATOR));
}
int arg_parse(int argc, char** argv, void** argtable) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
struct arg_end* endtable;
int endindex;
char** argvcopy = NULL;
int i;
/*printf("arg_parse(%d,%p,%p)\n",argc,argv,argtable);*/
/* reset any argtable data from previous invocations */
arg_reset(argtable);
/* locate the first end-of-table marker within the array */
endindex = arg_endindex(table);
endtable = (struct arg_end*)table[endindex];
/* Special case of argc==0. This can occur on Texas Instruments DSP. */
/* Failure to trap this case results in an unwanted NULL result from */
/* the malloc for argvcopy (next code block). */
if (argc == 0) {
/* We must still perform post-parse checks despite the absence of command line arguments */
arg_parse_check(table, endtable);
/* Now we are finished */
return endtable->count;
}
argvcopy = (char**)xmalloc(sizeof(char*) * (size_t)(argc + 1));
/*
Fill in the local copy of argv[]. We need a local copy
because getopt rearranges argv[] which adversely affects
susbsequent parsing attempts.
*/
for (i = 0; i < argc; i++)
argvcopy[i] = argv[i];
argvcopy[argc] = NULL;
/* parse the command line (local copy) for tagged options */
arg_parse_tagged(argc, argvcopy, table, endtable);
/* parse the command line (local copy) for untagged options */
arg_parse_untagged(argc, argvcopy, table, endtable);
/* if no errors so far then perform post-parse checks otherwise dont bother */
if (endtable->count == 0)
arg_parse_check(table, endtable);
/* release the local copt of argv[] */
xfree(argvcopy);
return endtable->count;
}
/*
* Concatenate contents of src[] string onto *pdest[] string.
* The *pdest pointer is altered to point to the end of the
* target string and *pndest is decremented by the same number
* of chars.
* Does not append more than *pndest chars into *pdest[]
* so as to prevent buffer overruns.
* Its something like strncat() but more efficient for repeated
* calls on the same destination string.
* Example of use:
* char dest[30] = "good"
* size_t ndest = sizeof(dest);
* char *pdest = dest;
* arg_char(&pdest,"bye ",&ndest);
* arg_char(&pdest,"cruel ",&ndest);
* arg_char(&pdest,"world!",&ndest);
* Results in:
* dest[] == "goodbye cruel world!"
* ndest == 10
*/
static void arg_cat(char** pdest, const char* src, size_t* pndest) {
char* dest = *pdest;
char* end = dest + *pndest;
/*locate null terminator of dest string */
while (dest < end-1 && *dest != 0)
dest++;
/* concat src string to dest string */
while (dest < end-1 && *src != 0)
*dest++ = *src++;
/* null terminate dest string */
*dest = 0;
/* update *pdest and *pndest */
*pndest = (size_t)(end - dest);
*pdest = dest;
}
static void arg_cat_option(char* dest, size_t ndest, const char* shortopts, const char* longopts, const char* datatype, int optvalue) {
if (shortopts) {
char option[3];
/* note: option array[] is initialiazed dynamically here to satisfy */
/* a deficiency in the watcom compiler wrt static array initializers. */
option[0] = '-';
option[1] = shortopts[0];
option[2] = 0;
arg_cat(&dest, option, &ndest);
if (datatype) {
arg_cat(&dest, " ", &ndest);
if (optvalue) {
arg_cat(&dest, "[", &ndest);
arg_cat(&dest, datatype, &ndest);
arg_cat(&dest, "]", &ndest);
} else
arg_cat(&dest, datatype, &ndest);
}
} else if (longopts) {
size_t ncspn;
/* add "--" tag prefix */
arg_cat(&dest, "--", &ndest);
/* add comma separated option tag */
ncspn = strcspn(longopts, ",");
#if (defined(__STDC_LIB_EXT1__) && defined(__STDC_WANT_LIB_EXT1__)) || (defined(__STDC_SECURE_LIB__) && defined(__STDC_WANT_SECURE_LIB__))
strncat_s(dest, ndest, longopts, (ncspn < ndest) ? ncspn : ndest);
#else
strncat(dest, longopts, (ncspn < ndest) ? ncspn : ndest);
#endif
if (datatype) {
arg_cat(&dest, "=", &ndest);
if (optvalue) {
arg_cat(&dest, "[", &ndest);
arg_cat(&dest, datatype, &ndest);
arg_cat(&dest, "]", &ndest);
} else
arg_cat(&dest, datatype, &ndest);
}
} else if (datatype) {
if (optvalue) {
arg_cat(&dest, "[", &ndest);
arg_cat(&dest, datatype, &ndest);
arg_cat(&dest, "]", &ndest);
} else
arg_cat(&dest, datatype, &ndest);
}
}
static void arg_cat_optionv(char* dest, size_t ndest, const char* shortopts, const char* longopts, const char* datatype, int optvalue, const char* separator) {
separator = separator ? separator : "";
if (shortopts) {
const char* c = shortopts;
while (*c) {
/* "-a|-b|-c" */
char shortopt[3];
/* note: shortopt array[] is initialiazed dynamically here to satisfy */
/* a deficiency in the watcom compiler wrt static array initializers. */
shortopt[0] = '-';
shortopt[1] = *c;
shortopt[2] = 0;
arg_cat(&dest, shortopt, &ndest);
if (*++c)
arg_cat(&dest, separator, &ndest);
}
}
/* put separator between long opts and short opts */
if (shortopts && longopts)
arg_cat(&dest, separator, &ndest);
if (longopts) {
const char* c = longopts;
while (*c) {
size_t ncspn;
/* add "--" tag prefix */
arg_cat(&dest, "--", &ndest);
/* add comma separated option tag */
ncspn = strcspn(c, ",");
#if (defined(__STDC_LIB_EXT1__) && defined(__STDC_WANT_LIB_EXT1__)) || (defined(__STDC_SECURE_LIB__) && defined(__STDC_WANT_SECURE_LIB__))
strncat_s(dest, ndest, c, (ncspn < ndest) ? ncspn : ndest);
#else
strncat(dest, c, (ncspn < ndest) ? ncspn : ndest);
#endif
c += ncspn;
/* add given separator in place of comma */
if (*c == ',') {
arg_cat(&dest, separator, &ndest);
c++;
}
}
}
if (datatype) {
if (longopts)
arg_cat(&dest, "=", &ndest);
else if (shortopts)
arg_cat(&dest, " ", &ndest);
if (optvalue) {
arg_cat(&dest, "[", &ndest);
arg_cat(&dest, datatype, &ndest);
arg_cat(&dest, "]", &ndest);
} else
arg_cat(&dest, datatype, &ndest);
}
}
void arg_print_option_ds(arg_dstr_t ds, const char* shortopts, const char* longopts, const char* datatype, const char* suffix) {
char syntax[200] = "";
suffix = suffix ? suffix : "";
/* there is no way of passing the proper optvalue for optional argument values here, so we must ignore it */
arg_cat_optionv(syntax, sizeof(syntax) - 1, shortopts, longopts, datatype, 0, "|");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, (char*)suffix);
}
/* this function should be deprecated because it doesn't consider optional argument values (ARG_HASOPTVALUE) */
void arg_print_option(FILE* fp, const char* shortopts, const char* longopts, const char* datatype, const char* suffix) {
arg_dstr_t ds = arg_dstr_create();
arg_print_option_ds(ds, shortopts, longopts, datatype, suffix);
fputs(arg_dstr_cstr(ds), fp);
arg_dstr_destroy(ds);
}
/*
* Print a GNU style [OPTION] string in which all short options that
* do not take argument values are presented in abbreviated form, as
* in: -xvfsd, or -xvf[sd], or [-xvsfd]
*/
static void arg_print_gnuswitch_ds(arg_dstr_t ds, struct arg_hdr** table) {
int tabindex;
const char* format1 = " -%c";
const char* format2 = " [-%c";
const char* suffix = "";
/* print all mandatory switches that are without argument values */
for (tabindex = 0; table[tabindex] && !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
/* skip optional options */
if (table[tabindex]->mincount < 1)
continue;
/* skip non-short options */
if (table[tabindex]->shortopts == NULL)
continue;
/* skip options that take argument values */
if (table[tabindex]->flag & ARG_HASVALUE)
continue;
/* print the short option (only the first short option char, ignore multiple choices)*/
arg_dstr_catf(ds, format1, table[tabindex]->shortopts[0]);
format1 = "%c";
format2 = "[%c";
}
/* print all optional switches that are without argument values */
for (tabindex = 0; table[tabindex] && !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
/* skip mandatory args */
if (table[tabindex]->mincount > 0)
continue;
/* skip args without short options */
if (table[tabindex]->shortopts == NULL)
continue;
/* skip args with values */
if (table[tabindex]->flag & ARG_HASVALUE)
continue;
/* print first short option */
arg_dstr_catf(ds, format2, table[tabindex]->shortopts[0]);
format2 = "%c";
suffix = "]";
}
arg_dstr_catf(ds, "%s", suffix);
}
void arg_print_syntax_ds(arg_dstr_t ds, void** argtable, const char* suffix) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int i, tabindex;
/* print GNU style [OPTION] string */
arg_print_gnuswitch_ds(ds, table);
/* print remaining options in abbreviated style */
for (tabindex = 0; table[tabindex] && !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
char syntax[200] = "";
const char *shortopts, *longopts, *datatype;
/* skip short options without arg values (they were printed by arg_print_gnu_switch) */
if (table[tabindex]->shortopts && !(table[tabindex]->flag & ARG_HASVALUE))
continue;
shortopts = table[tabindex]->shortopts;
longopts = table[tabindex]->longopts;
datatype = table[tabindex]->datatype;
arg_cat_option(syntax, sizeof(syntax) - 1, shortopts, longopts, datatype, table[tabindex]->flag & ARG_HASOPTVALUE);
if (strlen(syntax) > 0) {
/* print mandatory instances of this option */
for (i = 0; i < table[tabindex]->mincount; i++) {
arg_dstr_cat(ds, " ");
arg_dstr_cat(ds, syntax);
}
/* print optional instances enclosed in "[..]" */
switch (table[tabindex]->maxcount - table[tabindex]->mincount) {
case 0:
break;
case 1:
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]");
break;
case 2:
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]");
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]");
break;
default:
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]...");
break;
}
}
}
if (suffix) {
arg_dstr_cat(ds, (char*)suffix);
}
}
void arg_print_syntax(FILE* fp, void** argtable, const char* suffix) {
arg_dstr_t ds = arg_dstr_create();
arg_print_syntax_ds(ds, argtable, suffix);
fputs(arg_dstr_cstr(ds), fp);
arg_dstr_destroy(ds);
}
void arg_print_syntaxv_ds(arg_dstr_t ds, void** argtable, const char* suffix) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int i, tabindex;
/* print remaining options in abbreviated style */
for (tabindex = 0; table[tabindex] && !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
char syntax[200] = "";
const char *shortopts, *longopts, *datatype;
shortopts = table[tabindex]->shortopts;
longopts = table[tabindex]->longopts;
datatype = table[tabindex]->datatype;
arg_cat_optionv(syntax, sizeof(syntax) - 1, shortopts, longopts, datatype, table[tabindex]->flag & ARG_HASOPTVALUE, "|");
/* print mandatory options */
for (i = 0; i < table[tabindex]->mincount; i++) {
arg_dstr_cat(ds, " ");
arg_dstr_cat(ds, syntax);
}
/* print optional args enclosed in "[..]" */
switch (table[tabindex]->maxcount - table[tabindex]->mincount) {
case 0:
break;
case 1:
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]");
break;
case 2:
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]");
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]");
break;
default:
arg_dstr_cat(ds, " [");
arg_dstr_cat(ds, syntax);
arg_dstr_cat(ds, "]...");
break;
}
}
if (suffix) {
arg_dstr_cat(ds, (char*)suffix);
}
}
void arg_print_syntaxv(FILE* fp, void** argtable, const char* suffix) {
arg_dstr_t ds = arg_dstr_create();
arg_print_syntaxv_ds(ds, argtable, suffix);
fputs(arg_dstr_cstr(ds), fp);
arg_dstr_destroy(ds);
}
void arg_print_glossary_ds(arg_dstr_t ds, void** argtable, const char* format) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int tabindex;
format = format ? format : " %-20s %s\n";
for (tabindex = 0; !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
if (table[tabindex]->glossary) {
char syntax[200] = "";
const char* shortopts = table[tabindex]->shortopts;
const char* longopts = table[tabindex]->longopts;
const char* datatype = table[tabindex]->datatype;
const char* glossary = table[tabindex]->glossary;
arg_cat_optionv(syntax, sizeof(syntax) - 1, shortopts, longopts, datatype, table[tabindex]->flag & ARG_HASOPTVALUE, ", ");
arg_dstr_catf(ds, format, syntax, glossary);
}
}
}
void arg_print_glossary(FILE* fp, void** argtable, const char* format) {
arg_dstr_t ds = arg_dstr_create();
arg_print_glossary_ds(ds, argtable, format);
fputs(arg_dstr_cstr(ds), fp);
arg_dstr_destroy(ds);
}
/**
* Print a piece of text formatted, which means in a column with a
* left and a right margin. The lines are wrapped at whitspaces next
* to right margin. The function does not indent the first line, but
* only the following ones.
*
* See description of arg_print_formatted below.
*/
static void arg_print_formatted_ds(arg_dstr_t ds, const unsigned lmargin, const unsigned rmargin, const char* text) {
const unsigned int textlen = (unsigned int)strlen(text);
unsigned int line_start = 0;
unsigned int line_end = textlen;
const unsigned int colwidth = (rmargin - lmargin) + 1;
assert(strlen(text) < UINT_MAX);
/* Someone doesn't like us... */
if (line_end < line_start) {
arg_dstr_catf(ds, "%s\n", text);
}
while (line_end > line_start) {
/* Eat leading white spaces. This is essential because while
wrapping lines, there will often be a whitespace at beginning
of line. Preserve newlines */
while (isspace((int)(*(text + line_start))) && *(text + line_start) != '\n') {
line_start++;
}
/* Find last whitespace, that fits into line */
if (line_end - line_start > colwidth) {
line_end = line_start + colwidth;
while ((line_end > line_start) && !isspace((int)(*(text + line_end)))) {
line_end--;
}
/* If no whitespace could be found, eg. the text is one long word, break the word */
if (line_end == line_start) {
/* Set line_end to previous value */
line_end = line_start + colwidth;
} else {
/* Consume trailing spaces, except newlines */
while ((line_end > line_start) && isspace((int)(*(text + line_end))) && *(text + line_start) != '\n') {
line_end--;
}
/* Restore the last non-space character */
line_end++;
}
}
/* Output line of text */
while (line_start < line_end) {
char c = *(text + line_start);
/* If character is newline stop printing, skip this character, as a newline will be printed below. */
if (c == '\n') {
line_start++;
break;
}
arg_dstr_catc(ds, c);
line_start++;
}
arg_dstr_cat(ds, "\n");
/* Initialize another line */
if (line_end < textlen) {
unsigned i;
for (i = 0; i < lmargin; i++) {
arg_dstr_cat(ds, " ");
}
line_end = textlen;
}
} /* lines of text */
}
/**
* Print a piece of text formatted, which means in a column with a
* left and a right margin. The lines are wrapped at whitspaces next
* to right margin. The function does not indent the first line, but
* only the following ones.
*
* Example:
* arg_print_formatted( fp, 0, 5, "Some text that doesn't fit." )
* will result in the following output:
*
* Some
* text
* that
* doesn'
* t fit.
*
* Too long lines will be wrapped in the middle of a word.
*
* arg_print_formatted( fp, 2, 7, "Some text that doesn't fit." )
* will result in the following output:
*
* Some
* text
* that
* doesn'
* t fit.
*
* As you see, the first line is not indented. This enables output of
* lines, which start in a line where output already happened.
*
* Author: Uli Fouquet
*/
void arg_print_formatted(FILE* fp, const unsigned lmargin, const unsigned rmargin, const char* text) {
arg_dstr_t ds = arg_dstr_create();
arg_print_formatted_ds(ds, lmargin, rmargin, text);
fputs(arg_dstr_cstr(ds), fp);
arg_dstr_destroy(ds);
}
/**
* Prints the glossary in strict GNU format.
* Differences to arg_print_glossary() are:
* - wraps lines after 80 chars
* - indents lines without shortops
* - does not accept formatstrings
*
* Contributed by Uli Fouquet
*/
void arg_print_glossary_gnu_ds(arg_dstr_t ds, void** argtable) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int tabindex;
for (tabindex = 0; !(table[tabindex]->flag & ARG_TERMINATOR); tabindex++) {
if (table[tabindex]->glossary) {
char syntax[200] = "";
const char* shortopts = table[tabindex]->shortopts;
const char* longopts = table[tabindex]->longopts;
const char* datatype = table[tabindex]->datatype;
const char* glossary = table[tabindex]->glossary;
if (!shortopts && longopts) {
/* Indent trailing line by 4 spaces... */
memset(syntax, ' ', 4);
*(syntax + 4) = '\0';
}
arg_cat_optionv(syntax, sizeof(syntax) - 1, shortopts, longopts, datatype, table[tabindex]->flag & ARG_HASOPTVALUE, ", ");
/* If syntax fits not into column, print glossary in new line... */
if (strlen(syntax) > 25) {
arg_dstr_catf(ds, " %-25s %s\n", syntax, "");
*syntax = '\0';
}
arg_dstr_catf(ds, " %-25s ", syntax);
arg_print_formatted_ds(ds, 28, 79, glossary);
}
} /* for each table entry */
arg_dstr_cat(ds, "\n");
}
void arg_print_glossary_gnu(FILE* fp, void** argtable) {
arg_dstr_t ds = arg_dstr_create();
arg_print_glossary_gnu_ds(ds, argtable);
fputs(arg_dstr_cstr(ds), fp);
arg_dstr_destroy(ds);
}
/**
* Checks the argtable[] array for NULL entries and returns 1
* if any are found, zero otherwise.
*/
int arg_nullcheck(void** argtable) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int tabindex;
/*printf("arg_nullcheck(%p)\n",argtable);*/
if (!table)
return 1;
tabindex = 0;
do {
/*printf("argtable[%d]=%p\n",tabindex,argtable[tabindex]);*/
if (!table[tabindex])
return 1;
} while (!(table[tabindex++]->flag & ARG_TERMINATOR));
return 0;
}
/*
* arg_free() is deprecated in favour of arg_freetable() due to a flaw in its design.
* The flaw results in memory leak in the (very rare) case that an intermediate
* entry in the argtable array failed its memory allocation while others following
* that entry were still allocated ok. Those subsequent allocations will not be
* deallocated by arg_free().
* Despite the unlikeliness of the problem occurring, and the even unlikelier event
* that it has any deliterious effect, it is fixed regardless by replacing arg_free()
* with the newer arg_freetable() function.
* We still keep arg_free() for backwards compatibility.
*/
void arg_free(void** argtable) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
int tabindex = 0;
int flag;
/*printf("arg_free(%p)\n",argtable);*/
do {
/*
if we encounter a NULL entry then somewhat incorrectly we presume
we have come to the end of the array. It isnt strictly true because
an intermediate entry could be NULL with other non-NULL entries to follow.
The subsequent argtable entries would then not be freed as they should.
*/
if (table[tabindex] == NULL)
break;
flag = table[tabindex]->flag;
xfree(table[tabindex]);
table[tabindex++] = NULL;
} while (!(flag & ARG_TERMINATOR));
}
/* frees each non-NULL element of argtable[], where n is the size of the number of entries in the array */
void arg_freetable(void** argtable, size_t n) {
struct arg_hdr** table = (struct arg_hdr**)argtable;
size_t tabindex = 0;
/*printf("arg_freetable(%p)\n",argtable);*/
for (tabindex = 0; tabindex < n; tabindex++) {
if (table[tabindex] == NULL)
continue;
xfree(table[tabindex]);
table[tabindex] = NULL;
};
}
#ifdef _WIN32
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) {
return TRUE;
UNREFERENCED_PARAMETER(hinstDLL);
UNREFERENCED_PARAMETER(fdwReason);
UNREFERENCED_PARAMETER(lpvReserved);
}
#endif
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