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/* $OpenBSD: arguments.c,v 1.20 2017/08/23 09:14:21 nicm Exp $ */
/*
* 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 <vis.h>
#include "tmux.h"
/*
* Manipulate command arguments.
*/
struct args_entry {
u_char flag;
char *value;
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;
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);
}
/* 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);
}
/* Print a set of arguments. */
char *
args_print(struct args *args)
{
size_t len;
char *buf, *escaped;
int i, flags;
struct args_entry *entry;
static const char quoted[] = " #\"';$";
len = 1;
buf = xcalloc(1, len);
/* Process the flags first. */
RB_FOREACH(entry, args_tree, &args->tree) {
if (entry->value != NULL)
continue;
if (*buf == '\0')
args_print_add(&buf, &len, "-");
args_print_add(&buf, &len, "%c", entry->flag);
}
/* Then the flags with arguments. */
RB_FOREACH(entry, args_tree, &args->tree) {
if (entry->value == NULL)
continue;
if (*buf != '\0')
args_print_add(&buf, &len, " -%c ", entry->flag);
else
args_print_add(&buf, &len, "-%c ", entry->flag);
flags = VIS_OCTAL|VIS_TAB|VIS_NL;
if (entry->value[strcspn(entry->value, quoted)] != '\0')
flags |= VIS_DQ;
utf8_stravis(&escaped, entry->value, flags);
if (flags & VIS_DQ)
args_print_add(&buf, &len, "\"%s\"", escaped);
else
args_print_add(&buf, &len, "%s", escaped);
free(escaped);
}
/* And finally the argument vector. */
for (i = 0; i < args->argc; i++) {
if (*buf != '\0')
args_print_add(&buf, &len, " ");
flags = VIS_OCTAL|VIS_TAB|VIS_NL;
if (args->argv[i][strcspn(args->argv[i], quoted)] != '\0')
flags |= VIS_DQ;
utf8_stravis(&escaped, args->argv[i], flags);
if (flags & VIS_DQ)
args_print_add(&buf, &len, "\"%s\"", escaped);
else
args_print_add(&buf, &len, "%s", escaped);
free(escaped);
}
return (buf);
}
/* Return if an argument is present. */
int
args_has(struct args *args, u_char ch)
{
return (args_find(args, ch) != NULL);
}
/* 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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