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extend the abstract syntax API

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This commit is contained in:
krangelov
2021-08-06 12:43:30 +02:00
parent 87f1e24384
commit dc1644563f
11 changed files with 257 additions and 25 deletions
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54
src/runtime/c/text.cxx
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@@ -1,20 +1,18 @@
#include "data.h"
PGF_INTERNAL
int textcmp(PgfText &t1, PgfText &t2)
int textcmp(PgfText *t1, PgfText *t2)
{
for (size_t i = 0; ; i++) {
if (i >= t1.size)
return (i - t2.size);
if (i >= t2.size)
if (i >= t1->size)
return (i - t2->size);
if (i >= t2->size)
return 1;
if (t1.text[i] > t2.text[i])
if (t1->text[i] > t2->text[i])
return 1;
else if (t1.text[i] < t2.text[i])
else if (t1->text[i] < t2->text[i])
return -1;
i++;
}
}
@@ -52,4 +50,42 @@ pgf_utf8_decode(const uint8_t** src_inout)
return u;
}
PGF_API void
pgf_utf8_encode(uint32_t ucs, uint8_t** buf)
{
uint8_t* p = *buf;
if (ucs < 0x80) {
p[0] = (uint8_t) ucs;
*buf = p+1;
} else if (ucs < 0x800) {
p[0] = 0xc0 | (ucs >> 6);
p[1] = 0x80 | (ucs & 0x3f);
*buf = p+2;
} else if (ucs < 0x10000) {
p[0] = 0xe0 | (ucs >> 12);
p[1] = 0x80 | ((ucs >> 6) & 0x3f);
p[2] = 0x80 | (ucs & 0x3f);
*buf = p+3;
} else if (ucs < 0x200000) {
p[0] = 0xf0 | (ucs >> 18);
p[1] = 0x80 | ((ucs >> 12) & 0x3f);
p[2] = 0x80 | ((ucs >> 6) & 0x3f);
p[3] = 0x80 | (ucs & 0x3f);
*buf = p+4;
} else if (ucs < 0x4000000) {
p[0] = 0xf8 | (ucs >> 24);
p[1] = 0x80 | ((ucs >> 18) & 0x3f);
p[2] = 0x80 | ((ucs >> 12) & 0x3f);
p[3] = 0x80 | ((ucs >> 6) & 0x3f);
p[4] = 0x80 | (ucs & 0x3f);
*buf = p+5;
} else {
p[0] = 0xfc | (ucs >> 30);
p[1] = 0x80 | ((ucs >> 24) & 0x3f);
p[2] = 0x80 | ((ucs >> 18) & 0x3f);
p[3] = 0x80 | ((ucs >> 12) & 0x3f);
p[4] = 0x80 | ((ucs >> 6) & 0x3f);
p[5] = 0x80 | (ucs & 0x3f);
*buf = p+6;
}
}