Split ICU wrapper library into several sources

[yaz-moved-to-github.git] / src / icu_casemap.c

diff --git a/src/icu_casemap.c b/src/icu_casemap.c
new file mode 100644 (file)
index 0000000..4c50f69
--- /dev/null
+++ b/src/icu_casemap.c
@@ -0,0 +1,184 @@
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2009 Index Data
+ * See the file LICENSE for details.
+ */
+
+/**
+ * \file
+ * \brief ICU character case (u_strToUpper, etc)
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if YAZ_HAVE_ICU
+#include <yaz/xmalloc.h>
+
+#include <yaz/icu_I18N.h>
+
+#include <yaz/log.h>
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+struct icu_casemap
+{
+    char action;
+};
+
+struct icu_casemap * icu_casemap_create(char action, UErrorCode *status)
+{    
+    struct icu_casemap * casemap
+        = (struct icu_casemap *) xmalloc(sizeof(struct icu_casemap));
+    casemap->action = action;
+
+    switch (casemap->action)
+    {
+    case 'l':   
+    case 'L':   
+    case 'u':   
+    case 'U':   
+    case 't':  
+    case 'T':  
+    case 'f':  
+    case 'F':  
+        break;
+    default:
+        icu_casemap_destroy(casemap);
+        return 0;
+    }
+    return casemap;
+}
+
+void icu_casemap_destroy(struct icu_casemap * casemap)
+{
+    xfree(casemap);
+}
+
+int icu_casemap_casemap(struct icu_casemap * casemap,
+                        struct icu_buf_utf16 * dest16,
+                        struct icu_buf_utf16 * src16,
+                        UErrorCode *status,
+                        const char *locale)
+{
+    if(!casemap)
+        return 0;
+    
+    return icu_utf16_casemap(dest16, src16, locale,
+                             casemap->action, status);
+}
+
+int icu_utf16_casemap(struct icu_buf_utf16 * dest16,
+                      struct icu_buf_utf16 * src16,
+                      const char *locale, char action,
+                      UErrorCode *status)
+{
+    int32_t dest16_len = 0;
+
+    if (!src16->utf16_len)
+    {           /* guarding for empty source string */
+        if (dest16->utf16)
+            dest16->utf16[0] = (UChar) 0;
+        dest16->utf16_len = 0;
+        return U_ZERO_ERROR;
+    }
+    
+    switch (action)
+    {
+    case 'l':    
+    case 'L':    
+        dest16_len = u_strToLower(dest16->utf16, dest16->utf16_cap,
+                                  src16->utf16, src16->utf16_len, 
+                                  locale, status);
+        break;
+    case 'u':    
+    case 'U':    
+        dest16_len = u_strToUpper(dest16->utf16, dest16->utf16_cap,
+                                  src16->utf16, src16->utf16_len, 
+                                  locale, status);
+        break;
+    case 't':    
+    case 'T':    
+        dest16_len = u_strToTitle(dest16->utf16, dest16->utf16_cap,
+                                  src16->utf16, src16->utf16_len,
+                                  0, locale, status);
+        break;
+    case 'f':    
+    case 'F':    
+        dest16_len = u_strFoldCase(dest16->utf16, dest16->utf16_cap,
+                                   src16->utf16, src16->utf16_len,
+                                   U_FOLD_CASE_DEFAULT, status);
+        break;
+        
+    default:
+        return U_UNSUPPORTED_ERROR;
+        break;
+    }
+
+    /* check for buffer overflow, resize and retry */
+    if (*status == U_BUFFER_OVERFLOW_ERROR
+        && dest16 != src16        /* do not resize if in-place conversion */
+        )
+    {
+        icu_buf_utf16_resize(dest16, dest16_len * 2);
+        *status = U_ZERO_ERROR;
+
+        switch (action) {    
+        case 'l':    
+        case 'L':    
+            dest16_len = u_strToLower(dest16->utf16, dest16->utf16_cap,
+                                      src16->utf16, src16->utf16_len, 
+                                      locale, status);
+            break;
+        case 'u':    
+        case 'U':    
+            dest16_len = u_strToUpper(dest16->utf16, dest16->utf16_cap,
+                                      src16->utf16, src16->utf16_len, 
+                                      locale, status);
+            break;
+        case 't':    
+        case 'T':    
+            dest16_len = u_strToTitle(dest16->utf16, dest16->utf16_cap,
+                                      src16->utf16, src16->utf16_len,
+                                      0, locale, status);
+            break;
+        case 'f':    
+        case 'F':    
+            dest16_len = u_strFoldCase(dest16->utf16, dest16->utf16_cap,
+                                       src16->utf16, src16->utf16_len,
+                                       U_FOLD_CASE_DEFAULT, status);
+            break;
+        
+        default:
+            return U_UNSUPPORTED_ERROR;
+            break;
+        }
+    }
+    
+    if (U_SUCCESS(*status)
+        && dest16_len <= dest16->utf16_cap)
+        dest16->utf16_len = dest16_len;
+    else
+    {
+        if (dest16->utf16)
+            dest16->utf16[0] = (UChar) 0;
+        dest16->utf16_len = 0;
+    }
+  
+    return *status;
+}
+
+
+#endif /* YAZ_HAVE_ICU */
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+