print out times and reverse perfect elimination order no disabled

[libfirm] / ir / obstack / obstack_printf.c

diff --git a/ir/obstack/obstack_printf.c b/ir/obstack/obstack_printf.c
index 65f06dc..9d92092 100644 (file)
--- a/ir/obstack/obstack_printf.c
+++ b/ir/obstack/obstack_printf.c
@@ -1,21 +1,58 @@
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
 #include "obstack.h"
 
 #ifdef _WIN32
 #define vsnprintf _vsnprintf
 #endif
 
+int obstack_vprintf(struct obstack *obst, const char *fmt, va_list ap)
+{
+       char    buf[128];
+       char   *buffer = buf;
+       size_t  size   = sizeof(buf);
+       int     len;
+
+       for (;;) {
+               len = vsnprintf(buffer, size, fmt, ap);
+
+               /* snprintf should return -1 only in the error case, but older glibcs
+                * and probably other systems are buggy in this respect and return -1 if
+                * the buffer was too small. We only abort for LARGE unrealistic buffer
+                * sizes here */
+               if (len < 0) {
+                       if (buffer != buf)
+                               free(buffer);
+                       if (size > 65536)
+                               return -1;
+                       size *= 2;
+               } else if ((size_t)len >= size) {
+                       /* If we come here more than once, vsnprintf() returned garbage */
+                       assert(buffer == buf);
+                       size = (size_t)len + 1;
+               } else {
+                       break;
+               }
+               buffer = malloc(size);
+       }
+
+       obstack_grow(obst, buffer, len);
+       if (buffer != buf)
+               free(buffer);
+
+       return len;
+}
+
 int obstack_printf(struct obstack *obst, const char *fmt, ...)
 {
-  char buf[1024];
-  va_list ap;
-  int len;
+       va_list ap;
+       int     res;
 
-  va_start(ap, fmt);
-  len = vsnprintf(buf, sizeof(buf), fmt, ap);
-  obstack_grow(obst, buf, len);
-  va_end(ap);
+       va_start(ap, fmt);
+       res = obstack_vprintf(obst, fmt, ap);
+       va_end(ap);
 
-  return len;
+       return res;
 }