diff options
Diffstat (limited to 'src/tool/args.cc')
-rw-r--r-- | src/tool/args.cc | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/tool/args.cc b/src/tool/args.cc new file mode 100644 index 0000000..52856d4 --- /dev/null +++ b/src/tool/args.cc @@ -0,0 +1,73 @@ +/* Copyright (c) 2014, Google Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ + +#include <string> +#include <vector> + +#include <stdio.h> +#include <string.h> + +#include "internal.h" + + +bool ParseKeyValueArguments(std::map<std::string, std::string> *out_args, + const std::vector<std::string> &args, + const struct argument *templates) { + out_args->clear(); + + for (size_t i = 0; i < args.size(); i++) { + const std::string &arg = args[i]; + const struct argument *templ = nullptr; + for (size_t j = 0; templates[j].name[0] != 0; j++) { + if (strcmp(arg.c_str(), templates[j].name) == 0) { + templ = &templates[j]; + break; + } + } + + if (templ == nullptr) { + fprintf(stderr, "Unknown argument: %s\n", arg.c_str()); + return false; + } + + if (i + 1 >= args.size()) { + fprintf(stderr, "Missing argument for option: %s\n", arg.c_str()); + return false; + } + + if (out_args->find(arg) != out_args->end()) { + fprintf(stderr, "Duplicate value given for: %s\n", arg.c_str()); + return false; + } + + (*out_args)[arg] = args[++i]; + } + + for (size_t j = 0; templates[j].name[0] != 0; j++) { + const struct argument *templ = &templates[j]; + if (templ->required && out_args->find(templ->name) == out_args->end()) { + fprintf(stderr, "Missing value for required argument: %s\n", templ->name); + return false; + } + } + + return true; +} + +void PrintUsage(const struct argument *templates) { + for (size_t i = 0; templates[i].name[0] != 0; i++) { + const struct argument *templ = &templates[i]; + fprintf(stderr, "%s\t%s\n", templ->name, templ->description); + } +} |