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authorJosé Fonseca <jrfonseca@tungstengraphics.com>2008-08-09 11:51:29 +0100
committerJosé Fonseca <jrfonseca@tungstengraphics.com>2008-08-09 14:10:25 +0100
commit3e1974f94ef8796a5ac9e750d47ccb63c677a85b (patch)
tree761440eb9a1d208c0139e9fab5f8d0fd6e32ff57
parentb65259de6c0a2e77550bbef6b291c6d09dfb5867 (diff)
util: Utility functions to print to a string buffer without overflowing.
-rw-r--r--src/gallium/auxiliary/util/u_string.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_string.h b/src/gallium/auxiliary/util/u_string.h
index 73c88d87b4..abc3232b49 100644
--- a/src/gallium/auxiliary/util/u_string.h
+++ b/src/gallium/auxiliary/util/u_string.h
@@ -176,6 +176,43 @@ util_memmove(void *dest, const void *src, size_t n)
#endif
+/**
+ * Printable string buffer
+ */
+struct util_strbuf
+{
+ char *str;
+ char *ptr;
+ size_t left;
+};
+
+
+static INLINE void
+util_strbuf_init(struct util_strbuf *sbuf, char *str, size_t size)
+{
+ sbuf->str = str;
+ sbuf->str[0] = 0;
+ sbuf->ptr = sbuf->str;
+ sbuf->left = size;
+}
+
+
+static INLINE void
+util_strbuf_printf(struct util_strbuf *sbuf, const char *format, ...)
+{
+ if(sbuf->left > 1) {
+ size_t written;
+ va_list ap;
+ va_start(ap, format);
+ written = util_vsnprintf(sbuf->ptr, sbuf->left, format, ap);
+ va_end(ap);
+ sbuf->ptr += written;
+ sbuf->left -= written;
+ }
+}
+
+
+
#ifdef __cplusplus
}
#endif