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-rw-r--r--lib/src/split_argv.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/lib/src/split_argv.c b/lib/src/split_argv.c
new file mode 100644
index 0000000..9beec5c
--- /dev/null
+++ b/lib/src/split_argv.c
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * Copyright (C) 2018 - David Oberhollenzer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "util.h"
+
+char **split_argv(char *str)
+{
+ size_t i = 0, cap = 0, new_cap;
+ char **argv = NULL, **new;
+ char *ptr;
+
+ ptr = str;
+
+ for (;;) {
+ if (*ptr == ' ') {
+ ++ptr;
+ continue;
+ }
+
+ if (i == cap) {
+ new_cap = cap ? cap * 2 : 16;
+ new = realloc(argv, sizeof(argv[0]) * new_cap);
+
+ if (new == NULL) {
+ free(argv);
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ cap = new_cap;
+ argv = new;
+ }
+
+ if (*ptr == '\0') {
+ argv[i++] = NULL;
+ break;
+ }
+
+ argv[i++] = ptr;
+
+ if (*ptr == '"') {
+ ++ptr;
+ while (*ptr != '\0' && *ptr != '"') {
+ if (ptr[0] == '\\' && ptr[1] != '\0')
+ ++ptr;
+
+ ++ptr;
+ }
+
+ if (*ptr == '"')
+ ++ptr;
+
+ if (*ptr == ' ') {
+ *(ptr++) = '\0';
+ } else if (*ptr != '\0') {
+ goto fail_str;
+ }
+
+ if (unescape(argv[i - 1]))
+ goto fail_str;
+ } else {
+ while (*ptr != '\0' && *ptr != ' ')
+ ++ptr;
+
+ if (*ptr == ' ')
+ *(ptr++) = '\0';
+ }
+ }
+
+ return argv;
+fail_str:
+ free(argv);
+ errno = EINVAL;
+ return NULL;
+}