foo

[cdmenu] / menu / src / util.h

diff --git a/menu/src/util.h b/menu/src/util.h
new file mode 100644 (file)
index 0000000..258f7c8
--- /dev/null
+++ b/menu/src/util.h
@@ -0,0 +1,58 @@
+#ifndef UTIL_H_
+#define UTIL_H_
+
+#include <stdlib.h>
+#include "sizeint.h"
+
+#if defined(__WATCOMC__) || defined(_WIN32) || defined(__DJGPP__)
+#include <malloc.h>
+#else
+#include <alloca.h>
+#endif
+
+#ifdef __GNUC__
+#define PACKED __attribute__((packed))
+#else
+#define PACKED
+#endif
+
+
+/* Non-failing versions of malloc/calloc/realloc. They never return 0, they call
+ * demo_abort on failure. Use the macros, don't call the *_impl functions.
+ */
+#define malloc_nf(sz)  malloc_nf_impl(sz, __FILE__, __LINE__)
+void *malloc_nf_impl(size_t sz, const char *file, int line);
+#define calloc_nf(n, sz)       calloc_nf_impl(n, sz, __FILE__, __LINE__)
+void *calloc_nf_impl(size_t num, size_t sz, const char *file, int line);
+#define realloc_nf(p, sz)      realloc_nf_impl(p, sz, __FILE__, __LINE__)
+void *realloc_nf_impl(void *p, size_t sz, const char *file, int line);
+#define strdup_nf(s)   strdup_nf_impl(s, __FILE__, __LINE__)
+char *strdup_nf_impl(const char *s, const char *file, int line);
+
+int match_prefix(const char *str, const char *prefix);
+
+#ifndef INLINE
+#if (__STDC_VERSION__ >= 199901) || defined(__GNUC__)
+#define INLINE inline
+#else
+#define INLINE __inline
+#endif
+#endif
+
+#if defined(__i386__) || defined(__386__) || defined(MSDOS)
+
+/* fast conversion of double -> 32bit int
+ * for details see:
+ *  - http://chrishecker.com/images/f/fb/Gdmfp.pdf
+ *  - http://stereopsis.com/FPU.html#convert
+ */
+static INLINE int32_t cround64(double val)
+{
+       val += 6755399441055744.0;
+       return *(int32_t*)&val;
+}
+#else
+#define cround64(x)    ((int32_t)(x))
+#endif
+
+#endif /* UTIL_H_ */