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Diffstat (limited to 'arguments.c')
| -rw-r--r-- | arguments.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/arguments.c b/arguments.c new file mode 100644 index 00000000..dce6333b --- /dev/null +++ b/arguments.c @@ -0,0 +1,222 @@ +/* $Id: arguments.c,v 1.1 2011-01-07 14:45:33 tcunha Exp $ */ + +/* + * Copyright (c) 2010 Nicholas Marriott <nicm@users.sourceforge.net> + * + * Permission to use, copy, modify, and 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 MIND, 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 <sys/types.h> + +#include <bitstring.h> +#include <stdlib.h> +#include <string.h> + +#include "tmux.h" + +/* Create an arguments set with no flags. */ +struct args * +args_create(int argc, ...) +{ + struct args *args; + va_list ap; + int i; + + args = xcalloc(1, sizeof *args); + if ((args->flags = bit_alloc(SCHAR_MAX)) == NULL) + fatal("bit_alloc failed"); + + args->argc = argc; + if (argc == 0) + args->argv = NULL; + else + args->argv = xcalloc(argc, sizeof **args->argv); + + va_start(ap, argc); + for (i = 0; i < argc; i++) + args->argv[i] = xstrdup(va_arg(ap, char *)); + va_end(ap); + + return (args); +} + +/* Parse an argv and argc into a new argument set. */ +struct args * +args_parse(const char *template, int argc, char **argv) +{ + struct args *args; + char *ptr; + int opt; + + args = xcalloc(1, sizeof *args); + if ((args->flags = bit_alloc(SCHAR_MAX)) == NULL) + fatal("bit_alloc failed"); + + optreset = 1; + optind = 1; + + while ((opt = getopt(argc, argv, template)) != -1) { + if (opt < 0 || opt >= SCHAR_MAX) + continue; + if (opt == '?' || (ptr = strchr(template, opt)) == NULL) { + xfree(args->flags); + xfree(args); + return (NULL); + } + + bit_set(args->flags, opt); + if (ptr[1] == ':') { + if (args->values[opt] != NULL) + xfree(args->values[opt]); + args->values[opt] = xstrdup(optarg); + } + } + argc -= optind; + argv += optind; + + args->argc = argc; + args->argv = cmd_copy_argv(argc, argv); + + return (args); +} + +/* Free an arguments set. */ +void +args_free(struct args *args) +{ + u_int i; + + cmd_free_argv(args->argc, args->argv); + + for (i = 0; i < SCHAR_MAX; i++) { + if (args->values[i] != NULL) + xfree(args->values[i]); + } + + xfree(args->flags); + xfree(args); +} + +/* Print a set of arguments. */ +size_t +args_print(struct args *args, char *buf, size_t len) +{ + size_t off; + int i; + const char *quotes; + + /* There must be at least one byte at the start. */ + if (len == 0) + return (0); + off = 0; + + /* Process the flags first. */ + buf[off++] = '-'; + for (i = 0; i < SCHAR_MAX; i++) { + if (!bit_test(args->flags, i) || args->values[i] != NULL) + continue; + + if (off == len - 1) { + buf[off] = '\0'; + return (len); + } + buf[off++] = i; + buf[off] = '\0'; + } + if (off == 1) + buf[--off] = '\0'; + + /* Then the flags with arguments. */ + for (i = 0; i < SCHAR_MAX; i++) { + if (!bit_test(args->flags, i) || args->values[i] == NULL) + continue; + + if (off >= len) { + /* snprintf will have zero terminated. */ + return (len); + } + + if (strchr(args->values[i], ' ') != NULL) + quotes = "\""; + else + quotes = ""; + off += xsnprintf(buf + off, len - off, "%s-%c %s%s%s", + off != 0 ? " " : "", i, quotes, args->values[i], quotes); + } + + /* And finally the argument vector. */ + for (i = 0; i < args->argc; i++) { + if (off >= len) { + /* snprintf will have zero terminated. */ + return (len); + } + + if (strchr(args->argv[i], ' ') != NULL) + quotes = "\""; + else + quotes = ""; + off += xsnprintf(buf + off, len - off, "%s%s%s%s", + off != 0 ? " " : "", quotes, args->argv[i], quotes); + } + + return (off); +} + +/* Return if an argument is present. */ +int +args_has(struct args *args, u_char ch) +{ + return (bit_test(args->flags, ch)); +} + +/* Set argument value. */ +void +args_set(struct args *args, u_char ch, const char *value) +{ + if (value != NULL) { + if (args->values[ch] != NULL) + xfree(args->values[ch]); + args->values[ch] = xstrdup(value); + } + bit_set(args->flags, ch); +} + +/* Get argument value. Will be NULL if it isn't present. */ +const char * +args_get(struct args *args, u_char ch) +{ + return (args->values[ch]); +} + +/* Convert an argument value to a number. */ +long long +args_strtonum(struct args *args, + u_char ch, long long minval, long long maxval, char **cause) +{ + const char *errstr; + long long ll; + + if (!args_has(args, ch)) { + *cause = xstrdup("missing"); + return (0); + } + + ll = strtonum(args->values[ch], minval, maxval, &errstr); + if (errstr != NULL) { + *cause = xstrdup(errstr); + return (0); + } + + *cause = NULL; + return (ll); +} |