diff options
Diffstat (limited to 'tdemarkdown/md4c/md2html/cmdline.c')
| -rw-r--r-- | tdemarkdown/md4c/md2html/cmdline.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/tdemarkdown/md4c/md2html/cmdline.c b/tdemarkdown/md4c/md2html/cmdline.c new file mode 100644 index 000000000..c3fddfaa4 --- /dev/null +++ b/tdemarkdown/md4c/md2html/cmdline.c @@ -0,0 +1,205 @@ +/* + * C Reusables + * <http://github.com/mity/c-reusables> + * + * Copyright (c) 2017-2020 Martin Mitas + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include "cmdline.h" + +#include <stdio.h> +#include <string.h> + + +#ifdef _WIN32 + #define snprintf _snprintf +#endif + + +#define CMDLINE_AUXBUF_SIZE 32 + + + +static int +cmdline_handle_short_opt_group(const CMDLINE_OPTION* options, const char* arggroup, + int (*callback)(int /*optval*/, const char* /*arg*/, void* /*userdata*/), + void* userdata) +{ + const CMDLINE_OPTION* opt; + int i; + int ret = 0; + + for(i = 0; arggroup[i] != '\0'; i++) { + for(opt = options; opt->id != 0; opt++) { + if(arggroup[i] == opt->shortname) + break; + } + + if(opt->id != 0 && !(opt->flags & CMDLINE_OPTFLAG_REQUIREDARG)) { + ret = callback(opt->id, NULL, userdata); + } else { + /* Unknown option. */ + char badoptname[3]; + badoptname[0] = '-'; + badoptname[1] = arggroup[i]; + badoptname[2] = '\0'; + ret = callback((opt->id != 0 ? CMDLINE_OPTID_MISSINGARG : CMDLINE_OPTID_UNKNOWN), + badoptname, userdata); + } + + if(ret != 0) + break; + } + + return ret; +} + +int +cmdline_read(const CMDLINE_OPTION* options, int argc, char** argv, + int (*callback)(int /*optval*/, const char* /*arg*/, void* /*userdata*/), + void* userdata) +{ + const CMDLINE_OPTION* opt; + char auxbuf[CMDLINE_AUXBUF_SIZE+1]; + int fast_optarg_decision = 1; + int after_doubledash = 0; + int i = 1; + int ret = 0; + + auxbuf[CMDLINE_AUXBUF_SIZE] = '\0'; + + /* Check whether there is any CMDLINE_OPTFLAG_COMPILERLIKE option with + * a name not starting with '-'. That would imply we can to check for + * non-option arguments only after refusing all such options. */ + for(opt = options; opt->id != 0; opt++) { + if((opt->flags & CMDLINE_OPTFLAG_COMPILERLIKE) && opt->longname[0] != '-') + fast_optarg_decision = 0; + } + + while(i < argc) { + if(after_doubledash || strcmp(argv[i], "-") == 0) { + /* Non-option argument. + * Standalone "-" usually means "read from stdin" or "write to + * stdout" so treat it always as a non-option. */ + ret = callback(CMDLINE_OPTID_NONE, argv[i], userdata); + } else if(strcmp(argv[i], "--") == 0) { + /* End of options. All the remaining tokens are non-options + * even if they start with a dash. */ + after_doubledash = 1; + } else if(fast_optarg_decision && argv[i][0] != '-') { + /* Non-option argument. */ + ret = callback(CMDLINE_OPTID_NONE, argv[i], userdata); + } else { + for(opt = options; opt->id != 0; opt++) { + if(opt->flags & CMDLINE_OPTFLAG_COMPILERLIKE) { + size_t len = strlen(opt->longname); + if(strncmp(argv[i], opt->longname, len) == 0) { + /* Compiler-like option. */ + if(argv[i][len] != '\0') + ret = callback(opt->id, argv[i] + len, userdata); + else if(i+1 < argc) + ret = callback(opt->id, argv[++i], userdata); + else + ret = callback(CMDLINE_OPTID_MISSINGARG, opt->longname, userdata); + break; + } + } else if(opt->longname != NULL && strncmp(argv[i], "--", 2) == 0) { + size_t len = strlen(opt->longname); + if(strncmp(argv[i]+2, opt->longname, len) == 0) { + /* Regular long option. */ + if(argv[i][2+len] == '\0') { + /* with no argument provided. */ + if(!(opt->flags & CMDLINE_OPTFLAG_REQUIREDARG)) + ret = callback(opt->id, NULL, userdata); + else + ret = callback(CMDLINE_OPTID_MISSINGARG, argv[i], userdata); + break; + } else if(argv[i][2+len] == '=') { + /* with an argument provided. */ + if(opt->flags & (CMDLINE_OPTFLAG_OPTIONALARG | CMDLINE_OPTFLAG_REQUIREDARG)) { + ret = callback(opt->id, argv[i]+2+len+1, userdata); + } else { + snprintf(auxbuf, CMDLINE_AUXBUF_SIZE, "--%s", opt->longname); + ret = callback(CMDLINE_OPTID_BOGUSARG, auxbuf, userdata); + } + break; + } else { + continue; + } + } + } else if(opt->shortname != '\0' && argv[i][0] == '-') { + if(argv[i][1] == opt->shortname) { + /* Regular short option. */ + if(opt->flags & CMDLINE_OPTFLAG_REQUIREDARG) { + if(argv[i][2] != '\0') + ret = callback(opt->id, argv[i]+2, userdata); + else if(i+1 < argc) + ret = callback(opt->id, argv[++i], userdata); + else + ret = callback(CMDLINE_OPTID_MISSINGARG, argv[i], userdata); + break; + } else { + ret = callback(opt->id, NULL, userdata); + + /* There might be more (argument-less) short options + * grouped together. */ + if(ret == 0 && argv[i][2] != '\0') + ret = cmdline_handle_short_opt_group(options, argv[i]+2, callback, userdata); + break; + } + } + } + } + + if(opt->id == 0) { /* still not handled? */ + if(argv[i][0] != '-') { + /* Non-option argument. */ + ret = callback(CMDLINE_OPTID_NONE, argv[i], userdata); + } else { + /* Unknown option. */ + char* badoptname = argv[i]; + + if(strncmp(badoptname, "--", 2) == 0) { + /* Strip any argument from the long option. */ + char* assignment = strchr(badoptname, '='); + if(assignment != NULL) { + size_t len = assignment - badoptname; + if(len > CMDLINE_AUXBUF_SIZE) + len = CMDLINE_AUXBUF_SIZE; + strncpy(auxbuf, badoptname, len); + auxbuf[len] = '\0'; + badoptname = auxbuf; + } + } + + ret = callback(CMDLINE_OPTID_UNKNOWN, badoptname, userdata); + } + } + } + + if(ret != 0) + return ret; + i++; + } + + return ret; +} + |