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/* $OpenBSD: arguments.c,v 1.9 2014/04/11 19:35:54 nicm 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 <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
/*
* Manipulate command arguments.
*/
struct args_entry *args_find(struct args *, u_char);
RB_GENERATE(args_tree, args_entry, entry, args_cmp);
/* Arguments tree comparison function. */
int
args_cmp(struct args_entry *a1, struct args_entry *a2)
{
return (a1->flag - a2->flag);
}
/* 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);
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);
}
/* Find a flag in the arguments tree. */
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;
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);
}
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;
cmd_free_argv(args->argc, args->argv);
RB_FOREACH_SAFE(entry, args_tree, &args->tree, entry1) {
RB_REMOVE(args_tree, &args->tree, entry);
free(entry->value);
free(entry);
}
free(args);
}
/* Print a set of arguments. */
size_t
args_print(struct args *args, char *buf, size_t len)
{
size_t off, used;
int i;
const char *quotes;
struct args_entry *entry;
/* There must be at least one byte at the start. */
if (len == 0)
return (0);
off = 0;
/* Process the flags first. */
buf[off++] = '-';
RB_FOREACH(entry, args_tree, &args->tree) {
if (entry->value != NULL)
continue;
if (off == len - 1) {
buf[off] = '\0';
return (len);
}
buf[off++] = entry->flag;
buf[off] = '\0';
}
if (off == 1)
buf[--off] = '\0';
/* Then the flags with arguments. */
RB_FOREACH(entry, args_tree, &args->tree) {
if (entry->value == NULL)
continue;
if (off >= len) {
/* snprintf will have zero terminated. */
return (len);
}
if (strchr(entry->value, ' ') != NULL)
quotes = "\"";
else
quotes = "";
used = xsnprintf(buf + off, len - off, "%s-%c %s%s%s",
off != 0 ? " " : "", entry->flag, quotes, entry->value,
quotes);
if (used > len - off)
used = len - off;
off += used;
}
/* 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 = "";
used = xsnprintf(buf + off, len - off, "%s%s%s%s",
off != 0 ? " " : "", quotes, args->argv[i], quotes);
if (used > len - off)
used = len - off;
off += used;
}
return (off);
}
/* Return if an argument is present. */
int
args_has(struct args *args, u_char ch)
{
return (args_find(args, ch) == NULL ? 0 : 1);
}
/* Set argument value in the arguments tree. */
void
args_set(struct args *args, u_char ch, const char *value)
{
struct args_entry *entry;
/* Replace existing argument. */
if ((entry = args_find(args, ch)) != NULL) {
free(entry->value);
entry->value = NULL;
} else {
entry = xcalloc(1, sizeof *entry);
entry->flag = ch;
RB_INSERT(args_tree, &args->tree, entry);
}
if (value != NULL)
entry->value = xstrdup(value);
}
/* Get argument value. Will be NULL if it isn't present. */
const char *
args_get(struct args *args, u_char ch)
{
struct args_entry *entry;
if ((entry = args_find(args, ch)) == NULL)
return (NULL);
return (entry->value);
}
/* 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;
struct args_entry *entry;
if ((entry = args_find(args, ch)) == NULL) {
*cause = xstrdup("missing");
return (0);
}
ll = strtonum(entry->value, minval, maxval, &errstr);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
*cause = NULL;
return (ll);
}
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