1 files changed, 144 insertions, 0 deletions
diff --git a/source4/lib/json/printbuf.c b/source4/lib/json/printbuf.c
new file mode 100644
index 0000000000..79bdaf554a
--- /dev/null
+++ b/source4/lib/json/printbuf.c
@@ -0,0 +1,144 @@
+/*
+ * $Id: printbuf.c,v 1.5 2006/01/26 02:16:28 mclark Exp $
+ *
+ * Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
+ * Michael Clark <michael@metaparadigm.com>
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if HAVE_STDARG_H
+# include <stdarg.h>
+#else /* !HAVE_STDARG_H */
+# error Not enough var arg support!
+#endif /* HAVE_STDARG_H */
+
+#include "bits.h"
+#include "debug.h"
+#include "printbuf.h"
+
+struct printbuf* printbuf_new()
+{
+  struct printbuf *p;
+
+  if(!(p = calloc(1, sizeof(struct printbuf)))) return NULL;
+  p->size = 32;
+  p->bpos = 0;
+  if(!(p->buf = malloc(p->size))) {
+    free(p);
+    return NULL;
+  }
+  return p;
+}
+
+
+int printbuf_memappend(struct printbuf *p, char *buf, int size)
+{
+  char *t;
+  if(p->size - p->bpos <= size) {
+    int new_size = max(p->size * 2, p->bpos + size + 8);
+#ifdef PRINTBUF_DEBUG
+    mc_debug("printbuf_memappend: realloc "
+	     "bpos=%d wrsize=%d old_size=%d new_size=%d\n",
+	     p->bpos, size, p->size, new_size);
+#endif /* PRINTBUF_DEBUG */
+    if(!(t = realloc(p->buf, new_size))) return -1;
+    p->size = new_size;
+    p->buf = t;
+  }
+  memcpy(p->buf + p->bpos, buf, size);
+  p->bpos += size;
+  p->buf[p->bpos]= '\0';
+  return size;
+}
+
+#if !HAVE_VSNPRINTF && defined(WIN32)
+# define vsnprintf _vsnprintf
+#elif !HAVE_VSNPRINTF /* !HAVE_VSNPRINTF */
+# error Need vsnprintf!
+#endif /* !HAVE_VSNPRINTF && defined(WIN32) */
+
+#if !HAVE_VASPRINTF
+/* CAW: compliant version of vasprintf */
+static int vasprintf(char **buf, const char *fmt, va_list ap)
+{
+#ifndef WIN32
+	static char _T_emptybuffer = '\0';
+#endif /* !defined(WIN32) */
+	int chars;
+	char *b;
+
+	if(!buf) { return -1; }
+
+#ifdef WIN32
+	chars = _vscprintf(fmt, ap)+1;
+#else /* !defined(WIN32) */
+	/* CAW: RAWR! We have to hope to god here that vsnprintf doesn't overwrite
+	   our buffer like on some 64bit sun systems.... but hey, its time to move on */
+	chars = vsnprintf(&_T_emptybuffer, 0, fmt, ap)+1;
+	if(chars < 0) { chars *= -1; } /* CAW: old glibc versions have this problem */
+#endif /* defined(WIN32) */
+
+	b = (char*)malloc(sizeof(char)*chars);
+	if(!b) { return -1; }
+
+	if((chars = vsprintf(b, fmt, ap)) < 0)
+	{
+		free(b);
+	} else {
+		*buf = b;
+	}
+
+	return chars;
+}
+#endif /* !HAVE_VASPRINTF */
+
+int sprintbuf(struct printbuf *p, const char *msg, ...)
+{
+  va_list ap;
+  char *t;
+  int size;
+  char buf[128];
+
+  /* user stack buffer first */
+  va_start(ap, msg);
+  size = vsnprintf(buf, 128, msg, ap);
+  va_end(ap);
+  /* if string is greater than stack buffer, then use dynamic string
+     with vasprintf.  Note: some implementation of vsnprintf return -1
+     if output is truncated whereas some return the number of bytes that
+     would have been writen - this code handles both cases. */
+  if(size == -1 || size > 127) {
+    int ret;
+    va_start(ap, msg);
+    if((size = vasprintf(&t, msg, ap)) == -1) return -1;
+    va_end(ap);
+    ret = printbuf_memappend(p, t, size);
+    free(t);
+    return ret;
+  } else {
+    return printbuf_memappend(p, buf, size);
+  }
+}
+
+void printbuf_reset(struct printbuf *p)
+{
+  p->buf[0] = '\0';
+  p->bpos = 0;
+}
+
+void printbuf_free(struct printbuf *p)
+{
+  if(p) {
+    free(p->buf);
+    free(p);
+  }
+}