From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 23 Apr 2021 14:14:50 +0000 (+0000)
Subject: util: Commit forgotten pakfire_string_join function
X-Git-Tag: 0.9.28~1285^2~252
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b03e11277c49a6c0da4fcf14c5abefc043f3fb5b;p=pakfire.git

util: Commit forgotten pakfire_string_join function

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/util.c b/src/libpakfire/util.c
index 4b9e06e73..02a0047a8 100644
--- a/src/libpakfire/util.c
+++ b/src/libpakfire/util.c
@@ -226,6 +226,55 @@ char** pakfire_split_string(const char* s, char delim) {
 	return ret;
 }
 
+char* pakfire_string_join(char** list, const char* delim) {
+	if (!list)
+		return NULL;
+
+	size_t length = 0;
+	unsigned int elements = 0;
+
+	// Count the number of elements and the total length
+	for (char** item = list; *item; item++) {
+		length += strlen(*item);
+		elements++;
+	}
+
+	// Empty list?
+	if (!elements)
+		return NULL;
+
+	// Add the delimiters
+	length += strlen(delim) * (elements - 1);
+
+	// Allocate the result string
+	char* string = malloc(length + 1);
+	if (!string)
+		return NULL;
+
+	// Pointer to where we are writing
+	char* p = string;
+
+	size_t bytes_left = length;
+	size_t bytes_written;
+
+	for (char** item = list; *item; item++) {
+		bytes_written = snprintf(p, bytes_left, "%s", *item);
+
+		bytes_left -= bytes_written;
+		p += bytes_written;
+
+		// Write the delimiter
+		if (bytes_left) {
+			bytes_written = snprintf(p, bytes_left, "%s", delim);
+
+			bytes_left -= bytes_written;
+			p += bytes_written;
+		}
+	}
+
+	return string;
+}
+
 int pakfire_format_size(char* dst, size_t length, double value) {
 	const char* units[] = {
 		"%4.0f ",