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-rw-r--r--cqrlogo.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/cqrlogo.c b/cqrlogo.c
index 2bf24a9..e3b3263 100644
--- a/cqrlogo.c
+++ b/cqrlogo.c
@@ -17,6 +17,9 @@
#include "config.h"
+#define URLPATTERN "^[hH][tT][tT][pP][sS]\\?://%s/"
+#define TEXTSTOLEN "This QR Code has been stolen from %s!"
+
/* a bitmap */
struct bitmap_t {
int width;
@@ -46,12 +49,12 @@ int generate_png (struct bitmap_t *bitmap, char *http_referer) {
png_set_compression_level(png_ptr, Z_BEST_COMPRESSION);
#ifdef PNG_TEXT_SUPPORTED
+#define VERSIONSTR VERSION " (libpng %s, zlib %s)"
png_text text[3];
char *version;
- const char *v_libpng = png_libpng_ver, *v_zlib = zlib_version;
- version = malloc(18 + strlen(VERSION) + strlen(v_libpng) + strlen(v_zlib));
- sprintf(version, VERSION " (libpng %s, zlib %s)", png_libpng_ver, zlib_version);
+ version = malloc(sizeof(VERSIONSTR) + strlen(png_libpng_ver) + strlen(zlib_version));
+ sprintf(version, VERSIONSTR, png_libpng_ver, zlib_version);
text[0].compression = PNG_TEXT_COMPRESSION_zTXt;
text[0].key = "comment";
@@ -184,8 +187,8 @@ int main(int argc, char **argv) {
http_referer = server_name;
} else {
/* prepare pattern matching */
- pattern = malloc(28 + strlen(server_name));
- sprintf(pattern, "^[hH][tT][tT][pP][sS]\\?://%s/", server_name);
+ pattern = malloc(sizeof(URLPATTERN) + strlen(server_name));
+ sprintf(pattern, URLPATTERN, server_name);
if (regcomp(&preg, pattern, 0) != 0) {
fprintf(stderr, "regcomp() failed, returning nonzero\n");
return EXIT_FAILURE;
@@ -193,8 +196,8 @@ int main(int argc, char **argv) {
/* check if the QR-Code is for the correct server */
if ((referer = regexec(&preg, http_referer, 1, pmatch, 0)) != 0) {
- http_referer = malloc(44 + strlen(server_name));
- sprintf(http_referer, "This QR Code has been stolen from %s!", server_name);
+ http_referer = malloc(sizeof(TEXTSTOLEN) + strlen(server_name));
+ sprintf(http_referer, TEXTSTOLEN, server_name);
}
regfree(&preg);