Create Subversion repository

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 62 insertions, 0 deletions

diff --git a/lib/util/pm_c_util.h b/lib/util/pm_c_util.h
new file mode 100644
index 00000000..f21a2f82
--- /dev/null
+++ b/lib/util/pm_c_util.h
@@ -0,0 +1,62 @@
+#ifndef PM_C_UTIL_INCLUDED
+#define PM_C_UTIL_INCLUDED
+
+#undef MAX
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+#undef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#undef ABS
+#define ABS(a) ((a) >= 0 ? (a) : -(a))
+#undef SGN
+#define SGN(a)		(((a)<0) ? -1 : 1)
+#undef ODD
+#define ODD(n) ((n) & 1)
+#undef ROUND
+#define ROUND(X) (((X) >= 0) ? (int)((X)+0.5) : (int)((X)-0.5))
+#undef ROUNDU
+#define ROUNDU(X) ((unsigned int)((X)+0.5))
+#undef SQR
+#define SQR(a) ((a)*(a))
+
+/* NOTE: do not use "bool" as a type in an external interface.  It could
+   have different definitions on either side of the interface.  Even if both
+   sides include this interface header file, the conditional compilation
+   here means one side may use the typedef below and the other side may
+   use some other definition.  For an external interface, be safe and just
+   use "int".
+*/
+
+/* We used to assume that if TRUE was defined, then bool was too.
+   However, we had a report on 2001.09.21 of a Tru64 system that had
+   TRUE but not bool and on 2002.03.21 of an AIX 4.3 system that was
+   likewise.  So now we define bool all the time, unless the macro
+   HAVE_BOOL is defined.  If someone is using the Netpbm libraries and
+   also another library that defines bool, he can either make the
+   other library define/respect HAVE_BOOL or just define HAVE_BOOL in
+   the file that includes pm_config.h or with a compiler option.  Note
+   that C++ always has bool.  
+
+   A preferred way of getting booleans is <stdbool.h>.  But it's not
+   available on all platforms, and it's easy to reproduce what it does
+   here.
+*/
+#ifndef TRUE
+  #define TRUE 1
+  #endif
+#ifndef FALSE
+  #define FALSE 0
+  #endif
+/* C++ has a bool type and false and true constants built in. */
+#ifndef __cplusplus
+  #ifndef HAVE_BOOL
+    #define HAVE_BOOL 1
+    typedef int bool;
+    #endif
+  #ifndef true
+    enum boolvalue {false=0, true=1};
+    #endif
+  #endif
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
+#endif