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-rw-r--r--lib/curl_ctype.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/curl_ctype.h b/lib/curl_ctype.h
index da3bd95a6..1ffecb99a 100644
--- a/lib/curl_ctype.h
+++ b/lib/curl_ctype.h
@@ -22,6 +22,33 @@
*
***************************************************************************/
+#include "curl_setup.h"
+
+#ifdef CURL_DOES_CONVERSIONS
+
+/*
+ * Uppercase macro versions of ANSI/ISO is*() functions/macros which
+ * avoid negative number inputs with argument byte codes > 127.
+ *
+ * For non-ASCII platforms the C library character classification routines
+ * are used despite being locale-dependent, because this is better than
+ * not to work at all.
+ */
+#include <ctype.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)))
+#define ISUPPER(x) (isupper((int) ((unsigned char)x)))
+#define ISLOWER(x) (islower((int) ((unsigned char)x)))
+#define ISASCII(x) (isascii((int) ((unsigned char)x)))
+
+#else
+
int Curl_isspace(int c);
int Curl_isdigit(int c);
int Curl_isalnum(int c);
@@ -42,6 +69,9 @@ int Curl_islower(int c);
#define ISUPPER(x) (Curl_isupper((int) ((unsigned char)x)))
#define ISLOWER(x) (Curl_islower((int) ((unsigned char)x)))
#define ISASCII(x) (((x) >= 0) && ((x) <= 0x80))
+
+#endif
+
#define ISBLANK(x) (int)((((unsigned char)x) == ' ') || \
(((unsigned char)x) == '\t'))