Fix reserving of buffer size for url encoding.

2 files changed, 9 insertions, 0 deletions

diff --git a/api/src/c/api-client.c b/api/src/c/api-client.c
index a9b0654c83..aa14648dfa 100644
--- a/api/src/c/api-client.c
+++ b/api/src/c/api-client.c
@@ -164,6 +164,11 @@ void MapsWithMe_AppendString(char * buf, int bufSize, int * bytesAppended, char
   *bytesAppended += size;
 }
 
+int MapsWithMe_GetMaxBufferSize(int nameSize)
+{
+  return ((nameSize == 0) ? 17 : 17 + 3 * nameSize + 1);
+}
+
 int MapsWithMe_GenShortShowMapUrl(double lat, double lon, double zoom, char const * name, char * buf, int bufSize)
 {
   // URL format:
diff --git a/api/src/c/api-client.h b/api/src/c/api-client.h
index 9335a8950b..c2abea96d3 100644
--- a/api/src/c/api-client.h
+++ b/api/src/c/api-client.h
@@ -38,6 +38,10 @@ typedef struct
 char * MapsWithMe_GenShowMapUrl(MapsWithMe_ShowMapRequest const * request);
 */
 
+// Helper function to calculate maximum buffer size for
+// MapsWithMe_GenShortShowMapUrl (with null-terminator).
+int MapsWithMe_GetMaxBufferSize(int nameSize);
+
 // Helper method to generate short url.
 // Returns the number of bytes required to fit the whole URL or an error_code < 0 on error.
 int MapsWithMe_GenShortShowMapUrl(double lat, double lon, double zoomLevel, char const * name, char * buf, int bufSize);