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#include <ctype.h>
#define i_header
#include <stc/cstr.h>
#include <stc/cregex.h>
#include "utf8tabs.inc"
const uint8_t utf8_dtab[] = {
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
12,36,12,12,12,12,12,12,12,12,12,12,
};
unsigned utf8_encode(char *out, uint32_t c)
{
if (c < 0x80U) {
out[0] = (char) c;
return 1;
} else if (c < 0x0800U) {
out[0] = (char) ((c>>6 & 0x1F) | 0xC0);
out[1] = (char) ((c & 0x3F) | 0x80);
return 2;
} else if (c < 0x010000U) {
if ((c < 0xD800U) | (c >= 0xE000U)) {
out[0] = (char) ((c>>12 & 0x0F) | 0xE0);
out[1] = (char) ((c>>6 & 0x3F) | 0x80);
out[2] = (char) ((c & 0x3F) | 0x80);
return 3;
}
} else if (c < 0x110000U) {
out[0] = (char) ((c>>18 & 0x07) | 0xF0);
out[1] = (char) ((c>>12 & 0x3F) | 0x80);
out[2] = (char) ((c>>6 & 0x3F) | 0x80);
out[3] = (char) ((c & 0x3F) | 0x80);
return 4;
}
return 0;
}
uint32_t utf8_peek(const char* s, int pos) {
int inc = -1;
if (pos > 0) pos = -pos, inc = 1;
while (pos) pos += (*(s += inc) & 0xC0) != 0x80;
utf8_decode_t d = {.state=0};
do { utf8_decode(&d, (uint8_t)*s++); } while (d.state);
return d.codep;
}
bool utf8_valid_n(const char* s, size_t nbytes) {
utf8_decode_t d = {.state=0};
while ((nbytes-- != 0) & (*s != 0))
utf8_decode(&d, (uint8_t)*s++);
return d.state == 0;
}
uint32_t utf8_casefold(uint32_t c) {
for (size_t i=0; i < casefold_len; ++i) {
const struct CaseMapping entry = casemappings[i];
if (c <= entry.c2) {
if (c < entry.c1) return c;
int d = entry.m2 - entry.c2;
if (d == 1) return c + ((entry.c2 & 1) == (c & 1));
return c + d;
}
}
return c;
}
uint32_t utf8_tolower(uint32_t c) {
for (size_t i=0; i < sizeof upcase_ind/sizeof *upcase_ind; ++i) {
const struct CaseMapping entry = casemappings[upcase_ind[i]];
if (c <= entry.c2) {
if (c < entry.c1) return c;
int d = entry.m2 - entry.c2;
if (d == 1) return c + ((entry.c2 & 1) == (c & 1));
return c + d;
}
}
return c;
}
uint32_t utf8_toupper(uint32_t c) {
for (size_t i=0; i < sizeof lowcase_ind/sizeof *lowcase_ind; ++i) {
const struct CaseMapping entry = casemappings[lowcase_ind[i]];
if (c <= entry.m2) {
int d = entry.m2 - entry.c2;
if (c < (uint32_t)(entry.c1 + d)) return c;
if (d == 1) return c - ((entry.m2 & 1) == (c & 1));
return c - d;
}
}
return c;
}
int utf8_icmp_sv(const csview s1, const csview s2) {
utf8_decode_t d1 = {.state=0}, d2 = {.state=0};
size_t j1 = 0, j2 = 0;
while ((j1 < s1.size) & (j2 < s2.size)) {
do { utf8_decode(&d1, (uint8_t)s1.str[j1++]); } while (d1.state);
do { utf8_decode(&d2, (uint8_t)s2.str[j2++]); } while (d2.state);
int32_t c = utf8_casefold(d1.codep) - utf8_casefold(d2.codep);
if (c || !s2.str[j2 - 1]) // OK if s1.size and s2.size are npos
return c;
}
return s1.size - s2.size;
}
bool utf8_isspace(uint32_t c) {
static uint16_t t[] = {0x20, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x85, 0xA0,
0x1680, 0x2028, 0x2029, 0x202F, 0x205F, 0x3000};
for (size_t i=0; i<sizeof t/sizeof *t; ++i)
if (c == t[i]) return true;
return (c >= 0x2000) & (c <= 0x200A);
}
bool utf8_isdigit(uint32_t c) {
return ((c >= '0') & (c <= '9')) ||
((c >= 0xFF10) & (c <= 0xFF19));
}
bool utf8_isxdigit(uint32_t c) {
static uint16_t t[] = {0x30, 0x39, 0x41, 0x46, 0x61, 0x66, 0xFF10,
0xFF19, 0xFF21, 0xFF26, 0xFF41, 0xFF46};
for (size_t i=1; i<sizeof t/sizeof *t; i += 2)
if (c <= t[i]) return c >= t[i - 1];
return false;
}
bool utf8_isalnum(uint32_t c) {
if (c < 128) return isalnum(c) != 0;
if ((c >= 0xFF10) & (c <= 0xFF19)) return true;
return utf8_islower(c) || utf8_isupper(c);
}
bool utf8_isalpha(uint32_t c) {
if (c < 128) return isalpha(c) != 0;
return utf8_islower(c) || utf8_isupper(c);
}
static struct {
int (*conv_asc)(int);
uint32_t (*conv_utf)(uint32_t);
}
fn_tocase[] = {{tolower, utf8_casefold},
{tolower, utf8_tolower},
{toupper, utf8_toupper}};
cstr cstr_tocase(csview sv, int k) {
cstr out = cstr_null;
char *buf = cstr_reserve(&out, sv.size*3/2);
uint32_t cp; size_t sz = 0;
utf8_decode_t d = {.state=0};
while (*sv.str) {
do { utf8_decode(&d, (uint8_t)*sv.str++); } while (d.state);
if (d.codep < 128)
buf[sz++] = (char)fn_tocase[k].conv_asc(d.codep);
else {
cp = fn_tocase[k].conv_utf(d.codep);
sz += utf8_encode(buf + sz, cp);
}
}
_cstr_set_size(&out, sz);
cstr_shrink_to_fit(&out);
return out;
}
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