commit c507e30

New function xs_unicode_right_to_left().

 1@@ -21,6 +21,7 @@
 2  int xs_unicode_nfd(unsigned int cpoint, unsigned int *base, unsigned int *diac);
 3  int xs_unicode_nfc(unsigned int base, unsigned int diac, unsigned int *cpoint);
 4  int xs_unicode_is_alpha(unsigned int cpoint);
 5+ int xs_unicode_is_right_to_left(unsigned int cpoint);
 6 
 7 #ifdef _XS_H
 8  xs_str *xs_utf8_insert(xs_str *str, unsigned int cpoint, int *offset);
 9@@ -350,6 +351,29 @@ int xs_unicode_is_alpha(unsigned int cpoint)
10 }
11 
12 
13+int xs_unicode_is_right_to_left(unsigned int cpoint)
14+/* checks if a codepoint is a right-to-left letter */
15+{
16+    int b = 0;
17+    int t = xs_countof(xs_unicode_right_to_left_table) / 2 - 1;
18+
19+    while (t >= b) {
20+        int n = (b + t) / 2;
21+        unsigned int *p = &xs_unicode_right_to_left_table[n * 2];
22+
23+        if (cpoint < p[0])
24+            t = n - 1;
25+        else
26+        if (cpoint > p[1])
27+            b = n + 1;
28+        else
29+            return 1;
30+    }
31+
32+    return 0;
33+}
34+
35+
36 #ifdef _XS_H
37 
38 xs_str *xs_utf8_to_upper(const char *str)

 1@@ -726,5 +726,20 @@ static unsigned int xs_unicode_alpha_table[] = {
 2     0x1E7E0, 0x1E8C4, 0x1E900, 0x1E943, 0x1EE00, 0x1EEBB, 0x20000, 0x323AF, 
 3 };
 4 
 5+static unsigned int xs_unicode_right_to_left_table[] = {
 6+    0x05BE, 0x05BE, 0x05C0, 0x05C0, 0x05C3, 0x05C3, 0x05C6, 0x05C6, 
 7+    0x05D0, 0x05F4, 0x0608, 0x0608, 0x060B, 0x060B, 0x060D, 0x060D, 
 8+    0x061B, 0x064A, 0x066D, 0x066F, 0x0671, 0x06D5, 0x06E5, 0x06E6, 
 9+    0x06EE, 0x06EF, 0x06FA, 0x0710, 0x0712, 0x072F, 0x074D, 0x07A5, 
10+    0x07B1, 0x07EA, 0x07F4, 0x07F5, 0x07FA, 0x07FA, 0x07FE, 0x0815, 
11+    0x081A, 0x081A, 0x0824, 0x0824, 0x0828, 0x0828, 0x0830, 0x0858, 
12+    0x085E, 0x088E, 0x08A0, 0x08C9, 0x200F, 0x200F, 0xFB1D, 0xFB1D, 
13+    0xFB1F, 0xFB28, 0xFB2A, 0xFD3D, 0xFD50, 0xFDC7, 0xFDF0, 0xFDFC, 
14+    0xFE70, 0xFEFC, 0x10800, 0x1091B, 0x10920, 0x10A00, 0x10A10, 0x10A35, 
15+    0x10A40, 0x10AE4, 0x10AEB, 0x10B35, 0x10B40, 0x10D23, 0x10E80, 0x10EA9, 
16+    0x10EAD, 0x10EB1, 0x10F00, 0x10F45, 0x10F51, 0x10F81, 0x10F86, 0x10FF6, 
17+    0x1E800, 0x1E8CF, 0x1E900, 0x1E943, 0x1E94B, 0x1EEBB, 
18+};
19+
20 #endif /* _XS_UNICODE_TBL_H */
21 

1@@ -1 +1 @@
2-/* 35997d2dbc505320a62d3130daa95f638be8bb26 2024-11-05T16:47:36+01:00 */
3+/* ab0749f821f1c98d16cbec53201bdf2ba2a24a43 2024-11-20T17:02:42+01:00 */