[Complex Text Layouts] Add third-party TextServer dependencies (ICU, HarfBuzz, Graphite).

thirdparty/icu4c/common/ures_cnv.cpp

@@ -0,0 +1,78 @@
+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1997-2006, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*   file name:  ures_cnv.c
+*   encoding:   UTF-8
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2004aug25
+*   created by: Markus W. Scherer
+*
+*   Character conversion functions moved here from uresbund.c
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/putil.h"
+#include "unicode/ustring.h"
+#include "unicode/ucnv.h"
+#include "unicode/ures.h"
+#include "uinvchar.h"
+#include "ustr_cnv.h"
+
+U_CAPI UResourceBundle * U_EXPORT2
+ures_openU(const UChar *myPath, 
+           const char *localeID, 
+           UErrorCode *status)
+{
+    char pathBuffer[1024];
+    int32_t length;
+    char *path = pathBuffer;
+
+    if(status==NULL || U_FAILURE(*status)) {
+        return NULL;
+    }
+    if(myPath==NULL) {
+        path = NULL;
+    }
+    else {
+        length=u_strlen(myPath);
+        if(length>=(int32_t)sizeof(pathBuffer)) {
+            *status=U_ILLEGAL_ARGUMENT_ERROR;
+            return NULL;
+        } else if(uprv_isInvariantUString(myPath, length)) {
+            /*
+             * the invariant converter is sufficient for package and tree names
+             * and is more efficient
+             */
+            u_UCharsToChars(myPath, path, length+1); /* length+1 to include the NUL */
+        } else {
+#if !UCONFIG_NO_CONVERSION
+            /* use the default converter to support variant-character paths */
+            UConverter *cnv=u_getDefaultConverter(status);
+            length=ucnv_fromUChars(cnv, path, (int32_t)sizeof(pathBuffer), myPath, length, status);
+            u_releaseDefaultConverter(cnv);
+            if(U_FAILURE(*status)) {
+                return NULL;
+            }
+            if(length>=(int32_t)sizeof(pathBuffer)) {
+                /* not NUL-terminated - path too long */
+                *status=U_ILLEGAL_ARGUMENT_ERROR;
+                return NULL;
+            }
+#else
+            /* the default converter is not available */
+            *status=U_UNSUPPORTED_ERROR;
+            return NULL;
+#endif
+        }
+    }
+
+    return ures_open(path, localeID, status);
+}