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;
+}