Move definition of IS*() macros to setup_once.h

ares/setup_once.h

@@ -17,6 +17,16 @@
  */
 
 
+/********************************************************************
+ *                              NOTICE                              *
+ *                             ========                             *
+ *                                                                  *
+ *  Content of header files lib/setup_once.h and ares/setup_once.h  *
+ *  must be kept in sync. Modify the other one if you change this.  *
+ *                                                                  *
+ ********************************************************************/
+
+
 /*
  * If we have the MSG_NOSIGNAL define, make sure we use
  * it as the fourth argument of send() and recv()
@@ -67,7 +77,7 @@
                                    (RECV_TYPE_ARG4)(SEND_4TH_ARG))
 #endif
 #else /* HAVE_RECV */
-#ifdef DJGPP
+#ifdef MSDOS
 #define sread(x,y,z) (ssize_t)read_s((int)(x), (char *)(y), (int)(z))
 #endif
 #ifndef sread
@@ -94,7 +104,7 @@
                                     (SEND_TYPE_ARG4)(SEND_4TH_ARG))
 #endif
 #else /* HAVE_SEND */
-#ifdef DJGPP
+#ifdef MSDOS
 #define swrite(x,y,z) (ssize_t)write_s((int)(x), (char *)(y), (int)(z))
 #endif
 #ifndef swrite
@@ -105,5 +115,18 @@
 #endif /* HAVE_SEND */
 
 
+/*
+ * Uppercase macro versions of ANSI/ISO is*() functions/macros which 
+ * avoid negative number inputs whith argument byte codes > 127.
+ */
+
+#define ISSPACE(x)  (isspace((int)  ((unsigned char)x)))
+#define ISDIGIT(x)  (isdigit((int)  ((unsigned char)x)))
+#define ISALNUM(x)  (isalnum((int)  ((unsigned char)x)))
+#define ISXDIGIT(x) (isxdigit((int) ((unsigned char)x)))
+#define ISGRAPH(x)  (isgraph((int)  ((unsigned char)x)))
+#define ISALPHA(x)  (isalpha((int)  ((unsigned char)x)))
+
+
 #endif /* __SETUP_ONCE_H */
 

lib/setup.h

@@ -348,16 +348,6 @@ int fileno( FILE *stream);
 #define DEBUGF(x)
 #endif
 
-#ifndef ISSPACE
-/* typecasting craze to avoid negative number inputs to these macros */
-#define ISSPACE(x) (isspace((int)((unsigned char)x)))
-#define ISDIGIT(x) (isdigit((int)((unsigned char)x)))
-#define ISALNUM(x) (isalnum((int)((unsigned char)x)))
-#define ISXDIGIT(x) (isxdigit((int)((unsigned char)x)))
-#define ISGRAPH(x) (isgraph((int)((unsigned char)x)))
-#define ISALPHA(x) (isalpha((int)((unsigned char)x)))
-#endif
-
 /*
  * Include macros and defines that should only be processed once.
  */

lib/setup_once.h

@@ -24,6 +24,16 @@
  ***************************************************************************/
 
 
+/********************************************************************
+ *                              NOTICE                              *
+ *                             ========                             *
+ *                                                                  *
+ *  Content of header files lib/setup_once.h and ares/setup_once.h  *
+ *  must be kept in sync. Modify the other one if you change this.  *
+ *                                                                  *
+ ********************************************************************/
+
+
 /*
  * If we have the MSG_NOSIGNAL define, make sure we use
  * it as the fourth argument of send() and recv()
@@ -112,5 +122,18 @@
 #endif /* HAVE_SEND */
 
 
+/*
+ * Uppercase macro versions of ANSI/ISO is*() functions/macros which 
+ * avoid negative number inputs whith argument byte codes > 127.
+ */
+
+#define ISSPACE(x)  (isspace((int)  ((unsigned char)x)))
+#define ISDIGIT(x)  (isdigit((int)  ((unsigned char)x)))
+#define ISALNUM(x)  (isalnum((int)  ((unsigned char)x)))
+#define ISXDIGIT(x) (isxdigit((int) ((unsigned char)x)))
+#define ISGRAPH(x)  (isgraph((int)  ((unsigned char)x)))
+#define ISALPHA(x)  (isalpha((int)  ((unsigned char)x)))
+
+
 #endif /* __SETUP_ONCE_H */
 

src/setup.h

@@ -184,16 +184,12 @@ int fileno( FILE *stream);
 #define strdup(ptr) curlx_strdup(ptr)
 #endif
 
-#ifndef ISSPACE
-/* typecasting craze to avoid negative number inputs to these macros */
-/* copied from lib/setup.h */
-#define ISSPACE(x) (isspace((int)((unsigned char)x)))
-#define ISDIGIT(x) (isdigit((int)((unsigned char)x)))
-#define ISALNUM(x) (isalnum((int)((unsigned char)x)))
-#define ISXDIGIT(x) (isxdigit((int)((unsigned char)x)))
-#define ISGRAPH(x) (isgraph((int)((unsigned char)x)))
-#define ISALPHA(x) (isalpha((int)((unsigned char)x)))
-#define ISPRINT(x) (isprint((int)((unsigned char)x)))
+/*
+ * Include macros and defines that should only be processed once.
+ */
+
+#ifndef __SETUP_ONCE_H
+#include "setup_once.h"
 #endif
 
 #endif /* __SRC_CURL_SETUP_H */