arguments.c - tmux - Mirror of https://github.com/tmux/tmux

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crypto/opensslv.h

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/* $OpenBSD$ */ /* * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com> * * 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 <stdlib.h> #include <string.h> #include <unistd.h> #include "tmux.h" /* * Manipulate command arguments. */ struct args_value { char *value; TAILQ_ENTRY(args_value) entry; }; TAILQ_HEAD(args_values, args_value); struct args_entry { u_char flag; struct args_values values; u_int count; RB_ENTRY(args_entry) entry; }; static struct args_entry *args_find(struct args *, u_char); static int args_cmp(struct args_entry *, struct args_entry *); RB_GENERATE_STATIC(args_tree, args_entry, entry, args_cmp); /* Arguments tree comparison function. */ static int args_cmp(struct args_entry *a1, struct args_entry *a2) { return (a1->flag - a2->flag); } /* Find a flag in the arguments tree. */ static struct args_entry * args_find(struct args *args, u_char ch) { struct args_entry entry; entry.flag = ch; return (RB_FIND(args_tree, &args->tree, &entry)); } /* Parse an argv and argc into a new argument set. */ struct args * args_parse(const char *template, int argc, char **argv) { struct args *args; int opt; args = xcalloc(1, sizeof *args); optreset = 1; optind = 1; optarg = NULL; while ((opt = getopt(argc, argv, template)) != -1) { if (opt < 0) continue; if (opt == '?' || strchr(template, opt) == NULL) { args_free(args); return (NULL); } args_set(args, opt, optarg); optarg = NULL; } 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) { struct args_entry *entry; struct args_entry *entry1; struct args_value *value; struct args_value *value1; cmd_free_argv(args->argc, args->argv); RB_FOREACH_SAFE(entry, args_tree, &args->tree, entry1) { RB_REMOVE(args_tree, &args->tree, entry); TAILQ_FOREACH_SAFE(value, &entry->values, entry, value1) { TAILQ_REMOVE(&entry->values, value, entry); free(value->value); free(value); } free(entry); } free(args); } /* Add to string. */ static void printflike(3, 4) args_print_add(char **buf, size_t *len, const char *fmt, ...) { va_list ap; char *s; size_t slen; va_start(ap, fmt); slen = xvasprintf(&s, fmt, ap); va_end(ap); *len += slen; *buf = xrealloc(*buf, *len); strlcat(*buf, s, *len); free(s); } /* Add value to string. */ static void args_print_add_value(char **buf, size_t *len, struct args_entry *entry, struct args_value *value) { char *escaped; if (**buf != '\0') args_print_add(buf, len, " -%c ", entry->flag); else args_print_add(buf, len, "-%c ", entry->flag); escaped = args_escape(value->value); args_print_add(buf, len, "%s", escaped); free(escaped); } /* Add argument to string. */ static void args_print_add_argument(char **buf, size_t *len, const char *argument) { char *escaped; if (**buf != '\0') args_print_add(buf, len, " "); escaped = args_escape(argument); args_print_add(buf, len, "%s", escaped); free(escaped); } /* Print a set of arguments. */ char * args_print(struct args *args) { size_t len; char *buf; int i; u_int j; struct args_entry *entry; struct args_value *value; len = 1; buf = xcalloc(1, len); /* Process the flags first. */ RB_FOREACH(entry, args_tree, &args->tree) { if (!TAILQ_EMPTY(&entry->values)) continue; if (*buf == '\0') args_print_add(&buf, &len, "-"); for (j = 0; j < entry->count; j++) args_print_add(&buf, &len, "%c", entry->flag); } /* Then the flags with arguments. */ RB_FOREACH(entry, args_tree, &args->tree) { TAILQ_FOREACH(value, &entry->values, entry) args_print_add_value(&buf, &len, entry, value); } /* And finally the argument vector. */ for (i = 0; i < args->argc; i++) args_print_add_argument(&buf, &len, args->argv[i]); return (buf); } /* Escape an argument. */ char * args_escape(const char *s) { static const char quoted[] = " #\"';${}"; char *escaped, *result; int flags; if (*s == '\0') return (xstrdup(s)); if (s[0] != ' ' && (strchr(quoted, s[0]) != NULL || s[0] == '~') && s[1] == '\0') { xasprintf(&escaped, "\\%c", s[0]); return (escaped); } flags = VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL; if (s[strcspn(s, quoted)] != '\0') flags |= VIS_DQ; utf8_stravis(&escaped, s, flags); if (flags & VIS_DQ) { if (*escaped == '~') xasprintf(&result, "\"\\%s\"", escaped); else xasprintf(&result, "\"%s\"", escaped); } else { if (*escaped == '~') xasprintf(&result, "\\%s", escaped); else result = xstrdup(escaped); } free(escaped); return (result); } /* Return if an argument is present. */ int args_has(struct args *args, u_char ch) { struct args_entry *entry; entry = args_find(args, ch); if (entry == NULL) return (0); return (entry->count); } /* Set argument value in the arguments tree. */ void args_set(struct args *args, u_char ch, const char *s) { struct args_entry *entry; struct args_value *value; entry = args_find(args, ch); if (entry == NULL) { entry = xcalloc(1, sizeof *entry); entry->flag = ch; entry->count = 1; TAILQ_INIT(&entry->values); RB_INSERT(args_tree, &args->tree, entry); } else entry->count++; if (s