X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/agedu/blobdiff_plain/bf53e756e0d26c9cdca601e65f2e652bc1bb1b21..09fd761910218169867abf96b15d3cc1bc36e379:/html.c

diff --git a/html.c b/html.c
index 7633dec..db6c25b 100644
--- a/html.c
+++ b/html.c
@@ -2,18 +2,9 @@
  * html.c: implementation of html.h.
  */
 
-#include <assert.h>
-#include <stddef.h>
-#include <string.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <limits.h>
-#include <time.h>
-
 #include "agedu.h"
 #include "html.h"
-#include "malloc.h"
+#include "alloc.h"
 #include "trie.h"
 #include "index.h"
 
@@ -36,9 +27,16 @@ static void vhtprintf(struct html *ctx, char *fmt, va_list ap)
 {
     va_list ap2;
     int size, size2;
+    char testbuf[2];
 
     va_copy(ap2, ap);
-    size = vsnprintf(NULL, 0, fmt, ap2);
+    /*
+     * Some C libraries (Solaris, I'm looking at you) don't like
+     * an output buffer size of zero in vsnprintf, but will return
+     * sensible values given any non-zero buffer size. Hence, we
+     * use testbuf to gauge the length of the string.
+     */
+    size = vsnprintf(testbuf, 1, fmt, ap2);
     va_end(ap2);
 
     if (ctx->buflen + size >= ctx->bufsize) {