A fast, lightweight and minimalistic Wayland terminal emulator
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2.4 KiB

#include "tokenize.h"
#include <stdlib.h>
#include <string.h>
#define LOG_MODULE "tokenize"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "xmalloc.h"
static bool
push_argv(char ***argv, size_t *size, const char *arg, size_t len, size_t *argc)
{
if (arg != NULL && arg[0] == '%')
return true;
if (*argc >= *size) {
size_t new_size = *size > 0 ? 2 * *size : 10;
char **new_argv = realloc(*argv, new_size * sizeof(new_argv[0]));
if (new_argv == NULL)
return false;
*argv = new_argv;
*size = new_size;
}
(*argv)[(*argc)++] = arg != NULL ? xstrndup(arg, len) : NULL;
return true;
}
bool
tokenize_cmdline(const char *cmdline, char ***argv)
{
*argv = NULL;
size_t argv_size = 0;
const char *final_end = cmdline + strlen(cmdline) + 1;
bool first_token_is_quoted = cmdline[0] == '"' || cmdline[0] == '\'';
char delim = first_token_is_quoted ? cmdline[0] : ' ';
const char *p = first_token_is_quoted ? &cmdline[1] : &cmdline[0];
const char *search_start = p;
size_t idx = 0;
while (*p != '\0') {
char *end = strchr(search_start, delim);
if (end == NULL) {
if (delim != ' ') {
LOG_ERR("unterminated %s quote", delim == '"' ? "double" : "single");
free(*argv);
*argv = NULL;
return false;
}
if (!push_argv(argv, &argv_size, p, final_end - p, &idx) ||
!push_argv(argv, &argv_size, NULL, 0, &idx))
{
goto err;
} else
return true;
}
if (end > p && *(end - 1) == '\\') {
/* Escaped quote, remove one level of escaping and
* continue searching for "our" closing quote */
memmove(end - 1, end, strlen(end));
end[strlen(end) - 1] = '\0';
search_start = end;
continue;
}
//*end = '\0';
if (!push_argv(argv, &argv_size, p, end - p, &idx))
goto err;
p = end + 1;
while (*p == delim)
p++;
while (*p == ' ')
p++;
if (*p == '"' || *p == '\'') {
delim = *p;
p++;
} else
delim = ' ';
search_start = p;
}
if (!push_argv(argv, &argv_size, NULL, 0, &idx))
goto err;
return true;
err:
free(*argv);
return false;
}