Split configuration parser and utility library

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

1 files changed, 82 insertions, 0 deletions

diff --git a/lib/libcfg/pack_argv.c b/lib/libcfg/pack_argv.c
new file mode 100644
index 0000000..4d90171
--- /dev/null
+++ b/lib/libcfg/pack_argv.c
@@ -0,0 +1,82 @@
+/* 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 <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include "libcfg.h"
+
+int pack_argv(char *str)
+{
+	char *dst, *start;
+	int count = 0;
+
+	dst = str;
+
+	for (;;) {
+		while (*str == ' ')
+			++str;
+
+		if (*str == '\0')
+			break;
+
+		if (*str == '"') {
+			start = dst;
+			*(dst++) = *(str++);
+
+			while (*str != '"') {
+				if (*str == '\0')
+					goto fail_str;
+				if (str[0] == '\\' && str[1] != '\0')
+					*(dst++) = *(str++);
+				*(dst++) = *(str++);
+			}
+
+			*(dst++) = *(str++);
+
+			if (*str != ' ' && *str != '\0')
+				goto fail_str;
+			if (*str == ' ')
+				++str;
+
+			*(dst++) = '\0';
+
+			if (unescape(start))
+				goto fail_str;
+
+			dst = start + strlen(start) + 1;
+		} else {
+			while (*str != '\0' && *str != ' ')
+				*(dst++) = *(str++);
+			if (*str == ' ') {
+				++str;
+				*(dst++) = '\0';
+			}
+		}
+
+		++count;
+	}
+
+	*dst = '\0';
+	return count;
+fail_str:
+	errno = EINVAL;
+	return -1;
+}