Merge intoverflow.h into qdefs.h

[xonotic/darkplaces.git] / intoverflow.h

diff --git a/intoverflow.h b/intoverflow.h
deleted file mode 100644 (file)
index df90616..0000000
--- a/intoverflow.h
+++ /dev/null
@@ -1,22 +0,0 @@
-#ifndef INTOVERFLOW_H
-#define INTOVERFLOW_H
-
-// simple safe library to handle integer overflows when doing buffer size calculations
-// Usage:
-//   - calculate data size using INTOVERFLOW_??? macros
-//   - compare: calculated-size <= INTOVERFLOW_NORMALIZE(buffersize)
-// Functionality:
-//   - all overflows (values > INTOVERFLOW_MAX) and errors are mapped to INTOVERFLOW_MAX
-//   - if any input of an operation is INTOVERFLOW_MAX, INTOVERFLOW_MAX will be returned
-//   - otherwise, regular arithmetics apply
-
-#define INTOVERFLOW_MAX 2147483647
-
-#define INTOVERFLOW_ADD(a,b) (((a) < INTOVERFLOW_MAX && (b) < INTOVERFLOW_MAX && (a) < INTOVERFLOW_MAX - (b)) ? ((a) + (b)) : INTOVERFLOW_MAX)
-#define INTOVERFLOW_SUB(a,b) (((a) < INTOVERFLOW_MAX && (b) < INTOVERFLOW_MAX && (b) <= (a))                  ? ((a) - (b)) : INTOVERFLOW_MAX)
-#define INTOVERFLOW_MUL(a,b) (((a) < INTOVERFLOW_MAX && (b) < INTOVERFLOW_MAX && (a) < INTOVERFLOW_MAX / (b)) ? ((a) * (b)) : INTOVERFLOW_MAX)
-#define INTOVERFLOW_DIV(a,b) (((a) < INTOVERFLOW_MAX && (b) < INTOVERFLOW_MAX && (b) > 0)                     ? ((a) / (b)) : INTOVERFLOW_MAX)
-
-#define INTOVERFLOW_NORMALIZE(a) (((a) < INTOVERFLOW_MAX) ? (a) : (INTOVERFLOW_MAX - 1))
-
-#endif