From 94405f6b6011aaee0c5258425092720b46a79308 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Tue, 25 Feb 2014 13:19:14 +0100
Subject: make the lib handle max png comment size

---
 cqrlogo.c        | 12 +-----------
 lib/libcqrlogo.c | 16 +++++++++++++---
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/cqrlogo.c b/cqrlogo.c
index 4b87371..bfdd3d2 100644
--- a/cqrlogo.c
+++ b/cqrlogo.c
@@ -13,7 +13,7 @@
 /*** main ***/
 int main(int argc, char **argv) {
 	const char * http_referer, * server_name, * query_string, * uri;
-	char * uri_server_name, * uri_png, * pattern, * stolen;
+	char * uri_server_name, * pattern, * stolen;
 	regex_t preg;
 	regmatch_t pmatch[1];
 	uint8_t https;
@@ -28,7 +28,6 @@ int main(int argc, char **argv) {
 #endif
 	/* do the variable initialization within the loop! */
 	uri_server_name = NULL;
-	uri_png = NULL;
 	pattern = NULL;
 	stolen = NULL;
 
@@ -98,13 +97,6 @@ int main(int argc, char **argv) {
 	/* print HTTP header */
 	printf("Content-Type: image/png\n\n");
 
-	/* cut uri, text in png file may have a max length of 79 chars */
-	if (strlen(uri) > 79) {
-		uri_png = strdup(uri);
-		sprintf(uri_png + 76, "...");
-		uri = uri_png;
-	}
-
 	/* generate PNG data */
 	if ((png = generate_png(bitmap, CQR_COMMENT|CQR_REFERER|CQR_VERSION|CQR_LIBVERSION, uri)) == NULL) {
 		fprintf(stderr, "Failed to generate PNG.\n");
@@ -119,8 +111,6 @@ int main(int argc, char **argv) {
 		free(uri_server_name);
 	if (stolen)
 		free(stolen);
-	if (uri_png)
-		free(uri_png);
 	bitmap_free(bitmap);
 	if (png->size > 0)
 		free(png->buffer);
diff --git a/lib/libcqrlogo.c b/lib/libcqrlogo.c
index aca5cb5..cfe864c 100644
--- a/lib/libcqrlogo.c
+++ b/lib/libcqrlogo.c
@@ -73,13 +73,20 @@ struct png_t * generate_png (struct bitmap_t *bitmap, const uint8_t meta, const
 #if defined PNG_TEXT_SUPPORTED
 	unsigned int textcount = 0;
 	png_text *pngtext = NULL;
-	char *libsstr = NULL, *qrver;
+	char *curi = NULL, *libsstr = NULL, *qrver;
 
 	if (meta & CQR_COMMENT)
 		pngtext = add_png_text(pngtext, &textcount, "comment", "QR-Code created by cqrlogo - https://github.com/eworm-de/cqrlogo");
 
-	if (meta & CQR_REFERER)
-		pngtext = add_png_text(pngtext, &textcount, "referer", (char *)uri);
+	if (meta & CQR_REFERER) {
+		curi = strdup(uri);
+
+		/* text in png file may have a max length of 79 chars */
+		if (strlen(curi) > 79)
+			sprintf(curi + 76, "...");
+
+		pngtext = add_png_text(pngtext, &textcount, "referer", curi);
+	}
 
 	if (meta & CQR_VERSION)
 		pngtext = add_png_text(pngtext, &textcount, "version", VERSIONSTR);
@@ -95,6 +102,9 @@ struct png_t * generate_png (struct bitmap_t *bitmap, const uint8_t meta, const
 
 	png_set_text(png_ptr, info_ptr, pngtext, textcount);
 	png_free (png_ptr, pngtext);
+
+	if (curi)
+		free(curi);
 	if (libsstr)
 		free(libsstr);
 #endif
-- 
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