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Generate new tables for isalpha/toupper/tolower from UnicodeDate.txt

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This commit is contained in:
Tor Andersson
2021-07-20 15:01:53 +02:00
parent 1b8aae1d3c
commit 2a1804ea26
6 changed files with 2158 additions and 1150 deletions
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93
utf.c
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@@ -15,6 +15,9 @@
#include <string.h>
#include "utf.h"
#include "utfdata.h"
#define nelem(a) (int)(sizeof (a) / sizeof (a)[0])
typedef unsigned char uchar;
@@ -210,3 +213,93 @@ utflen(const char *s)
n++;
}
}
static const Rune *
ucd_bsearch(Rune c, const Rune *t, int n, int ne)
{
const Rune *p;
int m;
while(n > 1) {
m = n/2;
p = t + m*ne;
if(c >= p[0]) {
t = p;
n = n-m;
} else
n = m;
}
if(n && c >= t[0])
return t;
return 0;
}
Rune
tolowerrune(Rune c)
{
const Rune *p;
p = ucd_bsearch(c, ucd_tolower2, nelem(ucd_tolower2)/3, 3);
if(p && c >= p[0] && c <= p[1])
return c + p[2];
p = ucd_bsearch(c, ucd_tolower1, nelem(ucd_tolower1)/2, 2);
if(p && c == p[0])
return c + p[1];
return c;
}
Rune
toupperrune(Rune c)
{
const Rune *p;
p = ucd_bsearch(c, ucd_toupper2, nelem(ucd_toupper2)/3, 3);
if(p && c >= p[0] && c <= p[1])
return c + p[2];
p = ucd_bsearch(c, ucd_toupper1, nelem(ucd_toupper1)/2, 2);
if(p && c == p[0])
return c + p[1];
return c;
}
int
islowerrune(Rune c)
{
const Rune *p;
p = ucd_bsearch(c, ucd_toupper2, nelem(ucd_toupper2)/3, 3);
if(p && c >= p[0] && c <= p[1])
return 1;
p = ucd_bsearch(c, ucd_toupper1, nelem(ucd_toupper1)/2, 2);
if(p && c == p[0])
return 1;
return 0;
}
int
isupperrune(Rune c)
{
const Rune *p;
p = ucd_bsearch(c, ucd_tolower2, nelem(ucd_tolower2)/3, 3);
if(p && c >= p[0] && c <= p[1])
return 1;
p = ucd_bsearch(c, ucd_tolower1, nelem(ucd_tolower1)/2, 2);
if(p && c == p[0])
return 1;
return 0;
}
int
isalpharune(Rune c)
{
const Rune *p;
p = ucd_bsearch(c, ucd_alpha2, nelem(ucd_alpha2)/2, 2);
if(p && c >= p[0] && c <= p[1])
return 1;
p = ucd_bsearch(c, ucd_alpha1, nelem(ucd_alpha1), 1);
if(p && c == p[0])
return 1;
return 0;
}