Added portable getopt
This commit is contained in:
Phuntsok Drak-pa
parent
1c1de59c0a
commit
aaf8c09319
@ -37,6 +37,6 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "../debug/")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_COVERAGE_COMPILE_FLAGS}")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${CXX_COVERAGE_COMPILE_FLAGS}")
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include_directories(include)
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include_directories(includes)
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file(GLOB SOURCES "src/*.cc")
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add_executable(${TGT} ${SOURCES})
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244
includes/getopt.c
Normal file
244
includes/getopt.c
Normal file
@ -0,0 +1,244 @@
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/*
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Copyright 2005-2014 Rich Felker, et al.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "getopt.h"
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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char *optarg;
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int optind = 1, opterr = 1, optopt, __optpos, optreset = 0;
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#define optpos __optpos
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static void __getopt_msg(const char *a, const char *b, const char *c,
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size_t l) {
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FILE *f = stderr;
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flockfile(f);
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fputs(a, f) >= 0 && fwrite(b, strlen(b), 1, f) &&
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fwrite(c, 1, l, f) == l &&putc('\n', f);
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funlockfile(f);
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}
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int getopt(int argc, char *const argv[], const char *optstring) {
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int i, c, d;
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int k, l;
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char *optchar;
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if (!optind || optreset) {
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optreset = 0;
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__optpos = 0;
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optind = 1;
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}
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if (optind >= argc || !argv[optind])
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return -1;
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if (argv[optind][0] != '-') {
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if (optstring[0] == '-') {
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optarg = argv[optind++];
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return 1;
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}
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return -1;
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}
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if (!argv[optind][1])
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return -1;
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if (argv[optind][1] == '-' && !argv[optind][2])
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return optind++, -1;
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if (!optpos)
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optpos++;
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c = argv[optind][optpos], k = 1;
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optchar = argv[optind] + optpos;
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optopt = c;
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optpos += k;
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if (!argv[optind][optpos]) {
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optind++;
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optpos = 0;
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}
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if (optstring[0] == '-' || optstring[0] == '+')
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optstring++;
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i = 0;
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d = 0;
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do {
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d = optstring[i], l = 1;
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if (l > 0)
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i += l;
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else
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i++;
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} while (l && d != c);
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if (d != c) {
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if (optstring[0] != ':' && opterr)
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__getopt_msg(argv[0], ": unrecognized option: ", optchar, k);
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return '?';
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}
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if (optstring[i] == ':') {
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if (optstring[i + 1] == ':')
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optarg = 0;
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else if (optind >= argc) {
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if (optstring[0] == ':')
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return ':';
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if (opterr)
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__getopt_msg(argv[0], ": option requires an argument: ", optchar, k);
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return '?';
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}
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if (optstring[i + 1] != ':' || optpos) {
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optarg = argv[optind++] + optpos;
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optpos = 0;
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}
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}
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return c;
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}
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static void permute(char *const *argv, int dest, int src) {
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char **av = (char **)argv;
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char *tmp = av[src];
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int i;
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for (i = src; i > dest; i--)
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av[i] = av[i - 1];
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av[dest] = tmp;
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}
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static int __getopt_long_core(int argc, char *const *argv,
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const char *optstring,
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const struct option *longopts, int *idx,
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int longonly) {
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optarg = 0;
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if (longopts && argv[optind][0] == '-' &&
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((longonly && argv[optind][1] && argv[optind][1] != '-') ||
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(argv[optind][1] == '-' && argv[optind][2]))) {
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int colon = optstring[optstring[0] == '+' || optstring[0] == '-'] == ':';
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int i, cnt, match;
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char *opt;
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for (cnt = i = 0; longopts[i].name; i++) {
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const char *name = longopts[i].name;
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opt = argv[optind] + 1;
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if (*opt == '-')
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opt++;
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for (; *name && *name == *opt; name++, opt++)
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;
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if (*opt && *opt != '=')
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continue;
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match = i;
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if (!*name) {
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cnt = 1;
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break;
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}
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cnt++;
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}
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if (cnt == 1) {
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i = match;
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optind++;
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optopt = longopts[i].val;
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if (*opt == '=') {
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if (!longopts[i].has_arg) {
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if (colon || !opterr)
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return '?';
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__getopt_msg(argv[0],
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": option does not take an argument: ", longopts[i].name,
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strlen(longopts[i].name));
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return '?';
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}
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optarg = opt + 1;
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} else if (longopts[i].has_arg == required_argument) {
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if (!(optarg = argv[optind])) {
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if (colon)
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return ':';
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if (!opterr)
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return '?';
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__getopt_msg(argv[0],
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": option requires an argument: ", longopts[i].name,
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strlen(longopts[i].name));
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return '?';
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}
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optind++;
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}
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if (idx)
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*idx = i;
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if (longopts[i].flag) {
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*longopts[i].flag = longopts[i].val;
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return 0;
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}
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return longopts[i].val;
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}
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if (argv[optind][1] == '-') {
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if (!colon && opterr)
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__getopt_msg(argv[0],
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cnt ? ": option is ambiguous: "
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: ": unrecognized option: ",
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argv[optind] + 2, strlen(argv[optind] + 2));
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optind++;
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return '?';
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}
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}
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return getopt(argc, argv, optstring);
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}
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static int __getopt_long(int argc, char *const *argv, const char *optstring,
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const struct option *longopts, int *idx,
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int longonly) {
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int ret, skipped, resumed;
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if (!optind || optreset) {
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optreset = 0;
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__optpos = 0;
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optind = 1;
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}
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if (optind >= argc || !argv[optind])
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return -1;
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skipped = optind;
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if (optstring[0] != '+' && optstring[0] != '-') {
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int i;
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for (i = optind;; i++) {
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if (i >= argc || !argv[i])
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return -1;
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if (argv[i][0] == '-' && argv[i][1])
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break;
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}
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optind = i;
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}
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resumed = optind;
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ret = __getopt_long_core(argc, argv, optstring, longopts, idx, longonly);
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if (resumed > skipped) {
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int i, cnt = optind - resumed;
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for (i = 0; i < cnt; i++)
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permute(argv, skipped, optind - 1);
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optind = skipped + cnt;
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}
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return ret;
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}
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int getopt_long(int argc, char *const *argv, const char *optstring,
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const struct option *longopts, int *idx) {
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return __getopt_long(argc, argv, optstring, longopts, idx, 0);
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}
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int getopt_long_only(int argc, char *const *argv, const char *optstring,
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const struct option *longopts, int *idx) {
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return __getopt_long(argc, argv, optstring, longopts, idx, 1);
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}
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54
includes/getopt.h
Normal file
54
includes/getopt.h
Normal file
@ -0,0 +1,54 @@
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/*
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Copyright 2005-2014 Rich Felker, et al.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
|
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the following conditions:
|
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _GETOPT_H
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#define _GETOPT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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int getopt(int, char *const[], const char *);
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extern char *optarg;
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extern int optind, opterr, optopt, optreset;
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struct option {
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const char *name;
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int has_arg;
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int *flag;
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int val;
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};
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int getopt_long(int, char *const *, const char *, const struct option *, int *);
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int getopt_long_only(int, char *const *, const char *, const struct option *,
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int *);
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#define no_argument 0
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#define required_argument 1
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#define optional_argument 2
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#ifdef __cplusplus
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}
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#endif
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#endif
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