Data commit

Task/Reverse-a-string/C/reverse-a-string-1.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <wchar.h>
+
+const char *sa = "abcdef";
+const char *su = "as⃝df̅"; /* Should be in your native locale encoding. Mine is UTF-8 */
+
+int is_comb(wchar_t c)
+{
+	if (c >= 0x300 && c <= 0x36f) return 1;
+	if (c >= 0x1dc0 && c <= 0x1dff) return 1;
+	if (c >= 0x20d0 && c <= 0x20ff) return 1;
+	if (c >= 0xfe20 && c <= 0xfe2f) return 1;
+	return 0;
+}
+
+wchar_t* mb_to_wchar(const char *s)
+{
+	wchar_t *u;
+	size_t len = mbstowcs(0, s, 0) + 1;
+	if (!len) return 0;
+
+	u = malloc(sizeof(wchar_t) * len);
+	mbstowcs(u, s, len);
+	return u;
+}
+
+wchar_t* ws_reverse(const wchar_t* u)
+{
+	size_t len, i, j;
+	wchar_t *out;
+	for (len = 0; u[len]; len++);
+	out = malloc(sizeof(wchar_t) * (len + 1));
+	out[len] = 0;
+	j = 0;
+	while (len) {
+		for (i = len - 1; i && is_comb(u[i]); i--);
+		wcsncpy(out + j, u + i, len - i);
+		j += len - i;
+		len = i;
+	}
+	return out;
+}
+
+char *mb_reverse(const char *in)
+{
+	size_t len;
+	char *out;
+	wchar_t *u = mb_to_wchar(in);
+	wchar_t *r = ws_reverse(u);
+	len = wcstombs(0, r, 0) + 1;
+	out = malloc(len);
+	wcstombs(out, r, len);
+	free(u);
+	free(r);
+	return out;
+}
+
+int main(void)
+{
+	setlocale(LC_CTYPE, "");
+
+	printf("%s => %s\n", sa, mb_reverse(sa));
+	printf("%s => %s\n", su, mb_reverse(su));
+	return 0;
+}

Task/Reverse-a-string/C/reverse-a-string-2.c

@@ -0,0 +1,13 @@
+#include <glib.h>
+gchar *srev (const gchar *s) {
+    if (g_utf8_validate(s,-1,NULL)) {
+        return g_utf8_strreverse (s,-1);
+}   }
+// main
+int main (void) {
+    const gchar *t="asdf";
+    const gchar *u="as⃝df̅";
+    printf ("%s\n",srev(t));
+    printf ("%s\n",srev(u));
+    return 0;
+}