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New function xs_unicode_right_to_left().

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default 2024-11-20 18:10:02 +01:00
parent 781c0edcc6
commit c507e30607
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3 changed files with 40 additions and 1 deletions
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24
xs_unicode.h
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@ -21,6 +21,7 @@
int xs_unicode_nfd(unsigned int cpoint, unsigned int *base, unsigned int *diac);
int xs_unicode_nfc(unsigned int base, unsigned int diac, unsigned int *cpoint);
int xs_unicode_is_alpha(unsigned int cpoint);
int xs_unicode_is_right_to_left(unsigned int cpoint);
#ifdef _XS_H
xs_str *xs_utf8_insert(xs_str *str, unsigned int cpoint, int *offset);
@ -350,6 +351,29 @@ int xs_unicode_is_alpha(unsigned int cpoint)
}
int xs_unicode_is_right_to_left(unsigned int cpoint)
/* checks if a codepoint is a right-to-left letter */
{
int b = 0;
int t = xs_countof(xs_unicode_right_to_left_table) / 2 - 1;
while (t >= b) {
int n = (b + t) / 2;
unsigned int *p = &xs_unicode_right_to_left_table[n * 2];
if (cpoint < p[0])
t = n - 1;
else
if (cpoint > p[1])
b = n + 1;
else
return 1;
}
return 0;
}
#ifdef _XS_H
xs_str *xs_utf8_to_upper(const char *str)

15
xs_unicode_tbl.h
View file

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

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