curl-wrap: Tiny optimization

Breaks the dependency to asprintf.

Change-Id: I60fae81e0052b430a69277069907ec6b7ede8048
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

1 files changed, 10 insertions, 4 deletions

diff --git a/src/curl-wrap.c b/src/curl-wrap.c
index 3c566a3..9f010fb 100644
--- a/src/curl-wrap.c
+++ b/src/curl-wrap.c
@@ -170,10 +170,16 @@ int curl_wrap_add_header_value(CURL *curl, const char *name, const char *value)
 {
 	char *h;
 	int rc;
-
-	rc = asprintf(&h, "%s: %s", name, value);
-	rc = rc < 0 ? 0 : curl_wrap_add_header(curl, h);
-	free(h);
+	size_t sname, svalue;
+
+	sname = strlen(name);
+	svalue = strlen(value);
+	h = alloca(sname + svalue + 3);
+	memcpy(h, name, sname);
+	h[sname] = ':';
+	h[sname + 1] = ' ';
+	memcpy(h + sname + 2, value, svalue + 1);
+	rc = curl_wrap_add_header(curl, h);
 	return rc;
 }