From 7ff9415260fdbc607bc92afc39fe540acf70f207 Mon Sep 17 00:00:00 2001
From: Markus Scherer <markus.icu@gmail.com>
Date: Tue, 23 Nov 1999 22:52:17 +0000
Subject: [PATCH] ICU-165 added icu_stricmp()

X-SVN-Rev: 248
---
 icu4c/source/common/cstring.c | 43 +++++++++++++++++++++++++++++++----
 icu4c/source/common/cstring.h | 10 ++++++++
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/icu4c/source/common/cstring.c b/icu4c/source/common/cstring.c
index ebd01a3b41b..63ad7b3f01e 100644
--- a/icu4c/source/common/cstring.c
+++ b/icu4c/source/common/cstring.c
@@ -25,14 +25,12 @@
 
 
 
-#ifndef _CSTRING
-#include "cstring.h"
-#endif
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
+#include "utypes.h"
 #include "putil.h"
+#include "cstring.h"
 
 char*
 T_CString_toLowerCase(char* str)
@@ -95,4 +93,41 @@ T_CString_stringToInteger(const char *integerString, int32_t radix)
 
 }
     
+U_CAPI int U_EXPORT2
+T_CString_stricmp(const char *str1, const char *str2) {
+    if(str1==NULL) {
+        if(str2==NULL) {
+            return 0;
+        } else {
+            return -1;
+        }
+    } else if(str2==NULL) {
+        return 1;
+    } else {
+        /* compare non-NULL strings lexically with lowercase */
+        int rc;
+        unsigned char c1, c2;
 
+        for(;;) {
+            c1=(unsigned char)*str1;
+            c2=(unsigned char)*str2;
+            if(c1==0) {
+                if(c2==0) {
+                    return 0;
+                } else {
+                    return -1;
+                }
+            } else if(c2==0) {
+                return 1;
+            } else {
+                /* compare non-zero characters with lowercase */
+                rc=(int)(unsigned char)icu_tolower(c1)-(int)(unsigned char)icu_tolower(c2);
+                if(rc!=0) {
+                    return rc;
+                }
+            }
+            ++str1;
+            ++str2;
+        }
+    }
+}
diff --git a/icu4c/source/common/cstring.h b/icu4c/source/common/cstring.h
index 0b6d9500298..a123f3bf488 100644
--- a/icu4c/source/common/cstring.h
+++ b/icu4c/source/common/cstring.h
@@ -48,6 +48,13 @@
 #define icu_toupper(c) toupper(c)
 #define icu_tolower(c) tolower(c)
 #define icu_strtoul(str, end, base) strtoul(str, end, base)
+#ifdef WIN32
+#   define icu_stricmp(str1, str2) _stricmp(str1, str2)
+#elif defined(POSIX)
+#   define icu_stricmp(str1, str2) strcasecmp(str1, str2)
+#else
+#   define icu_stricmp(str1, str2) T_CString_stricmp(str1, str2)
+#endif
 
 /*===========================================================================*/
 /* Wide-character functions                                                  */
@@ -70,4 +77,7 @@ T_CString_integerToString(char *buffer, int32_t n, int32_t radix);
 U_CAPI int32_t U_EXPORT2
 T_CString_stringToInteger(const char *integerString, int32_t radix);
 
+U_CAPI int U_EXPORT2
+T_CString_stricmp(const char *str1, const char *str2);
+
 #endif /* ! CSTRING_H */