Return an error if the gzputs string length can't fit in an int.
diff --git a/gzwrite.c b/gzwrite.c
index 35b9aa6..3560193 100644
--- a/gzwrite.c
+++ b/gzwrite.c
@@ -353,8 +353,7 @@
gzFile file;
const char *str;
{
- int ret;
- z_size_t len;
+ z_size_t len, put;
gz_statep state;
/* get internal structure */
@@ -368,8 +367,12 @@
/* write string */
len = strlen(str);
- ret = gz_write(state, str, len);
- return ret == 0 && len != 0 ? -1 : ret;
+ if ((int)len < 0 || (unsigned)len != len) {
+ gz_error(state, Z_STREAM_ERROR, "string length does not fit in int");
+ return -1;
+ }
+ put = gz_write(state, str, len);
+ return put < len ? -1 : (int)len;
}
#if defined(STDC) || defined(Z_HAVE_STDARG_H)
