Introduce testing with munit, refactor

Split unicode routines from text.
Testing: add munit submodule, move translation units with main functions
to separate folder, make corresponding changes in Makefile. Make simple
test for unicode handling routine.
Remove _vimrc_local.
test.c: optimize includes.
Add test run to .travis.yml.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/unicode.c b/src/unicode.c
new file mode 100644
index 0000000..dea541a
--- /dev/null
+++ b/src/unicode.c
@@ -0,0 +1,52 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "unicode.h"
+
+static inline unsigned int utf8_char_len(unsigned char c)
+{
+    if (c > 0x00 && c < 0xC0)
+        return 1;
+    else if (c >= 0xC2 && c < 0xE0)
+        return 2;
+    else if (c >= 0xE0 && c < 0xF0)
+        return 3;
+    else if (c >= 0xF0 && c < 0xF5)
+        return 4;
+    else
+        return 0;
+}
+
+unsigned long utf8_strlen(void *string)
+{
+    unsigned long len = 0, keep = 0;
+    for (unsigned char *c = string; *c; (keep ? --keep : ++len), ++c)
+        if (!keep)
+            keep = (keep = utf8_char_len(*c)) ? keep - 1 : keep;
+    return len;
+}
+
+void utf8to32_strcpy(wchar_t *dest, char *src)
+{
+    wchar_t *dc = dest;
+    char *c = src;
+    unsigned long len = 0;
+    while (*c) {
+        int clen = utf8_char_len(*c);
+        if (clen == 1) {
+            dc[len] = c[0] & 0x7f;
+        } else if (clen == 2) {
+            dc[len] = ((c[0] & 0x1f) << 6) | ((c[1] & 0x3f) << 0);
+        } else if (clen == 3) {
+            dc[len] = ((c[0] & 0x0f) << 12) | ((c[1] & 0x3f) << 6) | ((c[2] & 0x3f) << 0);
+        } else if (clen == 4) {
+            dc[len] = ((c[0] & 0x07) << 18) | ((c[1] & 0x3f) << 12) | ((c[2] & 0x3f) << 6) | ((c[3] & 0x3f) << 0);
+        } else {
+            dc[len] = 0;
+            return;
+        }
+        c += clen;
+        ++len;
+    }
+    dc[len] = 0;
+}