Split ICU wrapper library into several sources

[yaz-moved-to-github.git] / src / icu_utf16.c

diff --git a/src/icu_utf16.c b/src/icu_utf16.c
new file mode 100644 (file)
index 0000000..55766a2
--- /dev/null
+++ b/src/icu_utf16.c
@@ -0,0 +1,120 @@
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2009 Index Data
+ * See the file LICENSE for details.
+ */
+
+/**
+ * \file
+ * \brief UTF-16 string utilities for ICU
+ */
+
+#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>
+
+#include <unicode/ustring.h>  /* some more string fcns*/
+#include <unicode/uchar.h>    /* char names           */
+
+struct icu_buf_utf16 * icu_buf_utf16_create(size_t capacity)
+{
+    struct icu_buf_utf16 * buf16 
+        = (struct icu_buf_utf16 *) xmalloc(sizeof(struct icu_buf_utf16));
+
+    buf16->utf16 = 0;
+    buf16->utf16_len = 0;
+    buf16->utf16_cap = 0;
+
+    if (capacity > 0)
+    {
+        buf16->utf16 = (UChar *) xmalloc(sizeof(UChar) * capacity);
+        buf16->utf16[0] = (UChar) 0;
+        buf16->utf16_cap = capacity;
+    }
+    return buf16;
+}
+
+struct icu_buf_utf16 * icu_buf_utf16_clear(struct icu_buf_utf16 * buf16)
+{
+    if (buf16)
+    {
+        if (buf16->utf16)
+            buf16->utf16[0] = (UChar) 0;
+        buf16->utf16_len = 0;
+    }
+    return buf16;
+}
+
+struct icu_buf_utf16 * icu_buf_utf16_resize(struct icu_buf_utf16 * buf16,
+                                            size_t capacity)
+{
+    if (!buf16)
+        return 0;
+    
+    if (capacity >  0)
+    {
+        if (0 == buf16->utf16)
+            buf16->utf16 = (UChar *) xmalloc(sizeof(UChar) * capacity);
+        else
+            buf16->utf16 
+                = (UChar *) xrealloc(buf16->utf16, sizeof(UChar) * capacity);
+
+        icu_buf_utf16_clear(buf16);
+        buf16->utf16_cap = capacity;
+    } 
+    else
+    {
+        xfree(buf16->utf16);
+        buf16->utf16 = 0;
+        buf16->utf16_len = 0;
+        buf16->utf16_cap = 0;
+    }
+
+    return buf16;
+}
+
+
+struct icu_buf_utf16 * icu_buf_utf16_copy(struct icu_buf_utf16 * dest16,
+                                          struct icu_buf_utf16 * src16)
+{
+    if (!dest16 || !src16 || dest16 == src16)
+        return 0;
+
+    if (dest16->utf16_cap < src16->utf16_len)
+        icu_buf_utf16_resize(dest16, src16->utf16_len * 2);
+
+    u_strncpy(dest16->utf16, src16->utf16, src16->utf16_len);
+    dest16->utf16_len = src16->utf16_len;
+
+    return dest16;
+}
+
+void icu_buf_utf16_destroy(struct icu_buf_utf16 * buf16)
+{
+    if (buf16)
+        xfree(buf16->utf16);
+    xfree(buf16);
+}
+
+
+#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
+ */
+