From: Nathan Wagner <nw@hydaspes.if.org>
Date: Sat, 15 Sep 2018 08:03:29 +0000 (+0000)
Subject: add zpm function to quote a string for sqlite
X-Git-Tag: v0.1.6~43
X-Git-Url: https://pd.if.org/git/?a=commitdiff_plain;ds=sidebyside;h=001a7667ffa1aaf5dc664cffa6dae6016c9e4cbc;p=zpackage

add zpm function to quote a string for sqlite
---

diff --git a/lib/quote.c b/lib/quote.c
new file mode 100644
index 0000000..61d28c3
--- /dev/null
+++ b/lib/quote.c
@@ -0,0 +1,35 @@
+#include <stddef.h>
+
+#include "sqlite3.h"
+
+int zpm_quote(char *value, char *dest, size_t n) {
+	size_t dlen = 0;
+	int nch = 0;
+	char *s;
+
+	/* figure out length of quoted string */
+	for (s = value; *s; s++) {
+		dlen++;
+		if (*s == '\'') dlen++;
+	}
+
+	/* if there's enough room for the string and the terminating null
+	 * byte, quote the string
+	 */
+	if (dest && dlen < n) {
+		while (*value) {
+			if (*value == '\'') {
+				*dest++ = '\'';
+				nch++;
+			}
+			*dest++ = *value++;
+			nch++;
+		}
+		dest[nch] = 0;
+	}
+
+	/* returns either the number of characters written or would
+	 * be written
+	 */
+	return dlen;
+}