From 9f8110adcc5a6f47b5db0915bb9265925d520856 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Tue, 4 Aug 2009 15:33:53 -0600
Subject: mesa: added _mesa_str_checksum()

---
 src/mesa/main/imports.c | 14 ++++++++++++++
 src/mesa/main/imports.h |  3 +++
 2 files changed, 17 insertions(+)

(limited to 'src/mesa/main')

diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index 8967bb3dd5..6ffaddcde9 100644
--- a/src/mesa/main/imports.c
+++ b/src/mesa/main/imports.c
@@ -911,6 +911,20 @@ _mesa_strtod( const char *s, char **end )
    return strtod(s, end);
 }
 
+/** Compute simple checksum/hash for a string */
+unsigned int
+_mesa_str_checksum(const char *str)
+{
+   /* This could probably be much better */
+   unsigned int sum, i;
+   const char *c;
+   sum = i = 1;
+   for (c = str; *c; c++)
+      sum += *c * (i % 100);
+   return sum;
+}
+
+
 /*@}*/
 
 
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 7b61e22e93..fb85f0862c 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -586,6 +586,9 @@ _mesa_atoi( const char *s );
 extern double
 _mesa_strtod( const char *s, char **end );
 
+extern unsigned int
+_mesa_str_checksum(const char *str);
+
 extern int
 _mesa_sprintf( char *str, const char *fmt, ... );
 
-- 
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