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ufo_data/utf8.h
Rich Geldreich 43d0d882ef new file
2023-10-05 14:07:27 -04:00

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// rg: I don't fully trust this code. I had to merge in a fix, add my own fix, and add asserts - the original code had none!
// I need to write my own utf8 handling code, but for comparing strings this will work for now.
/* The latest version of this library is available on GitHub;
* https://github.com/sheredom/utf8.h */
/* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* For more information, please refer to <http://unlicense.org/> */
#ifndef SHEREDOM_UTF8_H_INCLUDED
#define SHEREDOM_UTF8_H_INCLUDED
#if defined(_MSC_VER)
#pragma warning(push)
/* disable warning: no function prototype given: converting '()' to '(void)' */
#pragma warning(disable : 4255)
/* disable warning: '__cplusplus' is not defined as a preprocessor macro,
* replacing with '0' for '#if/#elif' */
#pragma warning(disable : 4668)
/* disable warning: bytes padding added after construct */
#pragma warning(disable : 4820)
#endif
#include <stddef.h>
#include <stdlib.h>
#include <assert.h>
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
#if defined(_MSC_VER) && (_MSC_VER < 1920)
typedef __int32 utf8_int32_t;
#else
#include <stdint.h>
typedef int32_t utf8_int32_t;
#endif
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wold-style-cast"
#pragma clang diagnostic ignored "-Wcast-qual"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_MSC_VER)
#define utf8_nonnull
#define utf8_pure
#define utf8_restrict __restrict
#define utf8_weak __inline
#elif defined(__clang__) || defined(__GNUC__)
#define utf8_nonnull __attribute__((nonnull))
#define utf8_pure __attribute__((pure))
#define utf8_restrict __restrict__
#define utf8_weak __attribute__((weak))
#else
#error Non clang, non gcc, non MSVC compiler found!
#endif
#ifdef __cplusplus
#define utf8_null NULL
#else
#define utf8_null 0
#endif
#if (defined(__cplusplus) && __cplusplus >= 201402L)
#define utf8_constexpr14 constexpr
#define utf8_constexpr14_impl constexpr
#else
/* constexpr and weak are incompatible. so only enable one of them */
#define utf8_constexpr14 utf8_weak
#define utf8_constexpr14_impl
#endif
#if defined(__cplusplus) && __cplusplus >= 202002L
using utf8_int8_t = char8_t; /* Introduced in C++20 */
#else
typedef char utf8_int8_t;
#endif
/* Return less than 0, 0, greater than 0 if src1 < src2, src1 == src2, src1 >
* src2 respectively, case insensitive. */
utf8_constexpr14 utf8_nonnull utf8_pure int
utf8casecmp(const utf8_int8_t* src1, const utf8_int8_t* src2);
/* Append the utf8 string src onto the utf8 string dst. */
utf8_nonnull utf8_weak utf8_int8_t*
utf8cat(utf8_int8_t* utf8_restrict dst, const utf8_int8_t* utf8_restrict src);
/* Find the first match of the utf8 codepoint chr in the utf8 string src. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8chr(const utf8_int8_t* src, utf8_int32_t chr);
/* Return less than 0, 0, greater than 0 if src1 < src2,
* src1 == src2, src1 > src2 respectively. */
utf8_constexpr14 utf8_nonnull utf8_pure int utf8cmp(const utf8_int8_t* src1,
const utf8_int8_t* src2);
/* Copy the utf8 string src onto the memory allocated in dst. */
utf8_nonnull utf8_weak utf8_int8_t*
utf8cpy(utf8_int8_t* utf8_restrict dst, const utf8_int8_t* utf8_restrict src);
/* Number of utf8 codepoints in the utf8 string src that consists entirely
* of utf8 codepoints not from the utf8 string reject. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t
utf8cspn(const utf8_int8_t* src, const utf8_int8_t* reject);
/* Duplicate the utf8 string src by getting its size, malloc'ing a new buffer
* copying over the data, and returning that. Or 0 if malloc failed. */
utf8_weak utf8_int8_t* utf8dup(const utf8_int8_t* src);
/* Number of utf8 codepoints in the utf8 string str,
* excluding the null terminating byte. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t utf8len(const utf8_int8_t* str);
/* Similar to utf8len, except that only at most n bytes of src are looked. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t utf8nlen(const utf8_int8_t* str,
size_t n);
/* Return less than 0, 0, greater than 0 if src1 < src2, src1 == src2, src1 >
* src2 respectively, case insensitive. Checking at most n bytes of each utf8
* string. */
utf8_constexpr14 utf8_nonnull utf8_pure int
utf8ncasecmp(const utf8_int8_t* src1, const utf8_int8_t* src2, size_t n);
/* Append the utf8 string src onto the utf8 string dst,
* writing at most n+1 bytes. Can produce an invalid utf8
* string if n falls partway through a utf8 codepoint. */
utf8_nonnull utf8_weak utf8_int8_t*
utf8ncat(utf8_int8_t* utf8_restrict dst, const utf8_int8_t* utf8_restrict src,
size_t n);
/* Return less than 0, 0, greater than 0 if src1 < src2,
* src1 == src2, src1 > src2 respectively. Checking at most n
* bytes of each utf8 string. */
utf8_constexpr14 utf8_nonnull utf8_pure int
utf8ncmp(const utf8_int8_t* src1, const utf8_int8_t* src2, size_t n);
/* Copy the utf8 string src onto the memory allocated in dst.
* Copies at most n bytes. If n falls partway through a utf8
* codepoint, or if dst doesn't have enough room for a null
* terminator, the final string will be cut short to preserve
* utf8 validity. */
utf8_nonnull utf8_weak utf8_int8_t*
utf8ncpy(utf8_int8_t* utf8_restrict dst, const utf8_int8_t* utf8_restrict src,
size_t n);
/* Similar to utf8dup, except that at most n bytes of src are copied. If src is
* longer than n, only n bytes are copied and a null byte is added.
*
* Returns a new string if successful, 0 otherwise */
utf8_weak utf8_int8_t* utf8ndup(const utf8_int8_t* src, size_t n);
/* Locates the first occurrence in the utf8 string str of any byte in the
* utf8 string accept, or 0 if no match was found. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8pbrk(const utf8_int8_t* str, const utf8_int8_t* accept);
/* Find the last match of the utf8 codepoint chr in the utf8 string src. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8rchr(const utf8_int8_t* src, int chr);
/* Number of bytes in the utf8 string str,
* including the null terminating byte. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t utf8size(const utf8_int8_t* str);
/* Similar to utf8size, except that the null terminating byte is excluded. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t
utf8size_lazy(const utf8_int8_t* str);
/* Similar to utf8size, except that only at most n bytes of src are looked and
* the null terminating byte is excluded. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t
utf8nsize_lazy(const utf8_int8_t* str, size_t n);
/* Number of utf8 codepoints in the utf8 string src that consists entirely
* of utf8 codepoints from the utf8 string accept. */
utf8_constexpr14 utf8_nonnull utf8_pure size_t
utf8spn(const utf8_int8_t* src, const utf8_int8_t* accept);
/* The position of the utf8 string needle in the utf8 string haystack. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8str(const utf8_int8_t* haystack, const utf8_int8_t* needle);
/* The position of the utf8 string needle in the utf8 string haystack, case
* insensitive. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8casestr(const utf8_int8_t* haystack, const utf8_int8_t* needle);
/* Return 0 on success, or the position of the invalid
* utf8 codepoint on failure. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8valid(const utf8_int8_t* str);
/* Similar to utf8valid, except that only at most n bytes of src are looked. */
utf8_constexpr14 utf8_nonnull utf8_pure utf8_int8_t*
utf8nvalid(const utf8_int8_t* str, size_t n);
/* Given a null-terminated string, makes the string valid by replacing invalid
* codepoints with a 1-byte replacement. Returns 0 on success. */
utf8_nonnull utf8_weak int utf8makevalid(utf8_int8_t* str,
const utf8_int32_t replacement);
/* Sets out_codepoint to the current utf8 codepoint in str, and returns the
* address of the next utf8 codepoint after the current one in str. */
utf8_constexpr14 utf8_nonnull utf8_int8_t*
utf8codepoint(const utf8_int8_t* utf8_restrict str,
utf8_int32_t* utf8_restrict out_codepoint);
/* Calculates the size of the next utf8 codepoint in str. */
utf8_constexpr14 utf8_nonnull size_t
utf8codepointcalcsize(const utf8_int8_t* str);
/* Returns the size of the given codepoint in bytes. */
utf8_constexpr14 size_t utf8codepointsize(utf8_int32_t chr);
/* Write a codepoint to the given string, and return the address to the next
* place after the written codepoint. Pass how many bytes left in the buffer to
* n. If there is not enough space for the codepoint, this function returns
* null. */
utf8_nonnull utf8_weak utf8_int8_t*
utf8catcodepoint(utf8_int8_t* str, utf8_int32_t chr, size_t n);
/* Returns 1 if the given character is lowercase, or 0 if it is not. */
utf8_constexpr14 int utf8islower(utf8_int32_t chr);
/* Returns 1 if the given character is uppercase, or 0 if it is not. */
utf8_constexpr14 int utf8isupper(utf8_int32_t chr);
/* Transform the given string into all lowercase codepoints. */
utf8_nonnull utf8_weak void utf8lwr(utf8_int8_t* utf8_restrict str);
/* Transform the given string into all uppercase codepoints. */
utf8_nonnull utf8_weak void utf8upr(utf8_int8_t* utf8_restrict str);
/* Make a codepoint lower case if possible. */
utf8_constexpr14 utf8_int32_t utf8lwrcodepoint(utf8_int32_t cp);
/* Make a codepoint upper case if possible. */
utf8_constexpr14 utf8_int32_t utf8uprcodepoint(utf8_int32_t cp);
/* Sets out_codepoint to the current utf8 codepoint in str, and returns the
* address of the previous utf8 codepoint before the current one in str. */
utf8_constexpr14 utf8_nonnull utf8_int8_t*
utf8rcodepoint(const utf8_int8_t* utf8_restrict str,
utf8_int32_t* utf8_restrict out_codepoint);
/* Duplicate the utf8 string src by getting its size, calling alloc_func_ptr to
* copy over data to a new buffer, and returning that. Or 0 if alloc_func_ptr
* returned null. */
utf8_weak utf8_int8_t* utf8dup_ex(const utf8_int8_t* src,
utf8_int8_t* (*alloc_func_ptr)(utf8_int8_t*,
size_t),
utf8_int8_t* user_data);
/* Similar to utf8dup, except that at most n bytes of src are copied. If src is
* longer than n, only n bytes are copied and a null byte is added.
*
* Returns a new string if successful, 0 otherwise. */
utf8_weak utf8_int8_t* utf8ndup_ex(const utf8_int8_t* src, size_t n,
utf8_int8_t* (*alloc_func_ptr)(utf8_int8_t*,
size_t),
utf8_int8_t* user_data);
#undef utf8_weak
#undef utf8_pure
#undef utf8_nonnull
utf8_constexpr14_impl int utf8casecmp(const utf8_int8_t* src1,
const utf8_int8_t* src2) {
utf8_int32_t src1_lwr_cp = 0, src2_lwr_cp = 0, src1_upr_cp = 0,
src2_upr_cp = 0, src1_orig_cp = 0, src2_orig_cp = 0;
for (;;) {
src1 = utf8codepoint(src1, &src1_orig_cp);
src2 = utf8codepoint(src2, &src2_orig_cp);
/* lower the srcs if required */
src1_lwr_cp = utf8lwrcodepoint(src1_orig_cp);
src2_lwr_cp = utf8lwrcodepoint(src2_orig_cp);
/* lower the srcs if required */
src1_upr_cp = utf8uprcodepoint(src1_orig_cp);
src2_upr_cp = utf8uprcodepoint(src2_orig_cp);
/* check if the lowered codepoints match */
if ((0 == src1_orig_cp) && (0 == src2_orig_cp)) {
return 0;
}
else if ((src1_lwr_cp == src2_lwr_cp) || (src1_upr_cp == src2_upr_cp)) {
continue;
}
/* if they don't match, then we return the difference between the characters
*/
return src1_lwr_cp - src2_lwr_cp;
}
}
utf8_int8_t* utf8cat(utf8_int8_t* utf8_restrict dst,
const utf8_int8_t* utf8_restrict src) {
utf8_int8_t* d = dst;
/* find the null terminating byte in dst */
while ('\0' != *d) {
d++;
}
/* overwriting the null terminating byte in dst, append src byte-by-byte */
while ('\0' != *src) {
*d++ = *src++;
}
/* write out a new null terminating byte into dst */
*d = '\0';
return dst;
}
utf8_constexpr14_impl utf8_int8_t* utf8chr(const utf8_int8_t* src,
utf8_int32_t chr) {
utf8_int8_t c[5] = { '\0', '\0', '\0', '\0', '\0' };
assert(chr >= 0);
if (0 == chr) {
/* being asked to return position of null terminating byte, so
* just run s to the end, and return! */
while ('\0' != *src) {
src++;
}
return (utf8_int8_t*)src;
}
else if (0 == ((utf8_int32_t)0xffffff80 & chr)) {
/* 1-byte/7-bit ascii
* (0b0xxxxxxx) */
c[0] = (utf8_int8_t)chr;
}
else if (0 == ((utf8_int32_t)0xfffff800 & chr)) {
/* 2-byte/11-bit utf8 code point
* (0b110xxxxx 0b10xxxxxx) */
c[0] = (utf8_int8_t)(0xc0 | (utf8_int8_t)(chr >> 6));
c[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
}
else if (0 == ((utf8_int32_t)0xffff0000 & chr)) {
/* 3-byte/16-bit utf8 code point
* (0b1110xxxx 0b10xxxxxx 0b10xxxxxx) */
c[0] = (utf8_int8_t)(0xe0 | (utf8_int8_t)(chr >> 12));
c[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 6) & 0x3f));
c[2] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
}
else { /* if (0 == ((int)0xffe00000 & chr)) { */
/* 4-byte/21-bit utf8 code point
* (0b11110xxx 0b10xxxxxx 0b10xxxxxx 0b10xxxxxx) */
c[0] = (utf8_int8_t)(0xf0 | (utf8_int8_t)(chr >> 18));
c[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 12) & 0x3f));
c[2] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 6) & 0x3f));
c[3] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
}
/* we've made c into a 2 utf8 codepoint string, one for the chr we are
* seeking, another for the null terminating byte. Now use utf8str to
* search */
return utf8str(src, c);
}
utf8_constexpr14_impl int utf8cmp(const utf8_int8_t* src1,
const utf8_int8_t* src2) {
while (('\0' != *src1) || ('\0' != *src2)) {
if (*src1 < *src2) {
return -1;
}
else if (*src1 > *src2) {
return 1;
}
src1++;
src2++;
}
/* both utf8 strings matched */
return 0;
}
utf8_constexpr14_impl int utf8coll(const utf8_int8_t* src1,
const utf8_int8_t* src2);
utf8_int8_t* utf8cpy(utf8_int8_t* utf8_restrict dst,
const utf8_int8_t* utf8_restrict src) {
utf8_int8_t* d = dst;
/* overwriting anything previously in dst, write byte-by-byte
* from src */
while ('\0' != *src) {
*d++ = *src++;
}
/* append null terminating byte */
*d = '\0';
return dst;
}
utf8_constexpr14_impl size_t utf8cspn(const utf8_int8_t* src,
const utf8_int8_t* reject) {
size_t chars = 0;
while ('\0' != *src) {
const utf8_int8_t* r = reject;
size_t offset = 0;
while ('\0' != *r) {
/* checking that if *r is the start of a utf8 codepoint
* (it is not 0b10xxxxxx) and we have successfully matched
* a previous character (0 < offset) - we found a match */
if ((0x80 != (0xc0 & *r)) && (0 < offset)) {
return chars;
}
else {
if (*r == src[offset]) {
/* part of a utf8 codepoint matched, so move our checking
* onwards to the next byte */
offset++;
r++;
}
else {
/* r could be in the middle of an unmatching utf8 code point,
* so we need to march it on to the next character beginning, */
do {
r++;
} while (0x80 == (0xc0 & *r));
/* reset offset too as we found a mismatch */
offset = 0;
}
}
}
/* found a match at the end of *r, so didn't get a chance to test it */
if (0 < offset) {
return chars;
}
/* the current utf8 codepoint in src did not match reject, but src
* could have been partway through a utf8 codepoint, so we need to
* march it onto the next utf8 codepoint starting byte */
do {
src++;
} while ((0x80 == (0xc0 & *src)));
chars++;
}
return chars;
}
utf8_int8_t* utf8dup(const utf8_int8_t* src) {
return utf8dup_ex(src, utf8_null, utf8_null);
}
utf8_int8_t* utf8dup_ex(const utf8_int8_t* src,
utf8_int8_t* (*alloc_func_ptr)(utf8_int8_t*, size_t),
utf8_int8_t* user_data) {
utf8_int8_t* n = utf8_null;
/* figure out how many bytes (including the terminator) we need to copy first
*/
size_t bytes = utf8size(src);
if (alloc_func_ptr) {
n = alloc_func_ptr(user_data, bytes);
}
else {
#if !defined(UTF8_NO_STD_MALLOC)
n = (utf8_int8_t*)malloc(bytes);
#else
return utf8_null;
#endif
}
if (utf8_null == n) {
/* out of memory so we bail */
return utf8_null;
}
else {
bytes = 0;
/* copy src byte-by-byte into our new utf8 string */
while ('\0' != src[bytes]) {
n[bytes] = src[bytes];
bytes++;
}
/* append null terminating byte */
n[bytes] = '\0';
return n;
}
}
utf8_constexpr14_impl utf8_int8_t* utf8fry(const utf8_int8_t* str);
utf8_constexpr14_impl size_t utf8len(const utf8_int8_t* str) {
return utf8nlen(str, SIZE_MAX);
}
utf8_constexpr14_impl size_t utf8nlen(const utf8_int8_t* str, size_t n) {
const utf8_int8_t* t = str;
size_t length = 0;
while ((size_t)(str - t) < n && '\0' != *str) {
if (0xf0 == (0xf8 & *str)) {
/* 4-byte utf8 code point (began with 0b11110xxx) */
str += 4;
}
else if (0xe0 == (0xf0 & *str)) {
/* 3-byte utf8 code point (began with 0b1110xxxx) */
str += 3;
}
else if (0xc0 == (0xe0 & *str)) {
/* 2-byte utf8 code point (began with 0b110xxxxx) */
str += 2;
}
else { /* if (0x00 == (0x80 & *s)) { */
/* 1-byte ascii (began with 0b0xxxxxxx) */
str += 1;
}
/* no matter the bytes we marched s forward by, it was
* only 1 utf8 codepoint */
length++;
}
if ((size_t)(str - t) > n) {
length--;
}
return length;
}
utf8_constexpr14_impl int utf8ncasecmp(const utf8_int8_t* src1,
const utf8_int8_t* src2, size_t n) {
utf8_int32_t src1_lwr_cp = 0, src2_lwr_cp = 0, src1_upr_cp = 0,
src2_upr_cp = 0, src1_orig_cp = 0, src2_orig_cp = 0;
do {
const utf8_int8_t* const s1 = src1;
const utf8_int8_t* const s2 = src2;
/* first check that we have enough bytes left in n to contain an entire
* codepoint */
if (0 == n) {
return 0;
}
if ((1 == n) && ((0xc0 == (0xe0 & *s1)) || (0xc0 == (0xe0 & *s2)))) {
const utf8_int32_t c1 = (0xe0 & *s1);
const utf8_int32_t c2 = (0xe0 & *s2);
if (c1 < c2) {
return c1 - c2;
}
else {
return 0;
}
}
if ((2 >= n) && ((0xe0 == (0xf0 & *s1)) || (0xe0 == (0xf0 & *s2)))) {
const utf8_int32_t c1 = (0xf0 & *s1);
const utf8_int32_t c2 = (0xf0 & *s2);
if (c1 < c2) {
return c1 - c2;
}
else {
return 0;
}
}
if ((3 >= n) && ((0xf0 == (0xf8 & *s1)) || (0xf0 == (0xf8 & *s2)))) {
const utf8_int32_t c1 = (0xf8 & *s1);
const utf8_int32_t c2 = (0xf8 & *s2);
if (c1 < c2) {
return c1 - c2;
}
else {
return 0;
}
}
src1 = utf8codepoint(src1, &src1_orig_cp);
src2 = utf8codepoint(src2, &src2_orig_cp);
n -= utf8codepointsize(src1_orig_cp);
src1_lwr_cp = utf8lwrcodepoint(src1_orig_cp);
src2_lwr_cp = utf8lwrcodepoint(src2_orig_cp);
src1_upr_cp = utf8uprcodepoint(src1_orig_cp);
src2_upr_cp = utf8uprcodepoint(src2_orig_cp);
/* check if the lowered codepoints match */
if ((0 == src1_orig_cp) && (0 == src2_orig_cp)) {
return 0;
}
else if ((src1_lwr_cp == src2_lwr_cp) || (src1_upr_cp == src2_upr_cp)) {
continue;
}
/* if they don't match, then we return the difference between the characters
*/
return src1_lwr_cp - src2_lwr_cp;
} while (0 < n);
/* both utf8 strings matched */
return 0;
}
utf8_int8_t* utf8ncat(utf8_int8_t* utf8_restrict dst,
const utf8_int8_t* utf8_restrict src, size_t n) {
utf8_int8_t* d = dst;
/* find the null terminating byte in dst */
while ('\0' != *d) {
d++;
}
/* overwriting the null terminating byte in dst, append src byte-by-byte
* stopping if we run out of space */
while (('\0' != *src) && (0 != n--)) {
*d++ = *src++;
}
/* write out a new null terminating byte into dst */
*d = '\0';
return dst;
}
utf8_constexpr14_impl int utf8ncmp(const utf8_int8_t* src1,
const utf8_int8_t* src2, size_t n) {
while ((0 != n--) && (('\0' != *src1) || ('\0' != *src2))) {
if (*src1 < *src2) {
return -1;
}
else if (*src1 > *src2) {
return 1;
}
src1++;
src2++;
}
/* both utf8 strings matched */
return 0;
}
utf8_int8_t* utf8ncpy(utf8_int8_t* utf8_restrict dst,
const utf8_int8_t* utf8_restrict src, size_t n) {
utf8_int8_t* d = dst;
size_t index = 0, check_index = 0;
if (n == 0) {
return dst;
}
/* overwriting anything previously in dst, write byte-by-byte
* from src */
for (index = 0; index < n; index++) {
d[index] = src[index];
if ('\0' == src[index]) {
break;
}
}
for (check_index = index - 1;
check_index > 0 && 0x80 == (0xc0 & d[check_index]); check_index--) {
/* just moving the index */
}
if (check_index < index &&
//(index - check_index) < utf8codepointsize(d[check_index])) {
(index - check_index) < utf8codepointcalcsize(&d[check_index])) { // see https://github.com/sheredom/utf8.h/pull/110/commits/731434bd5537d7e5ebfb565eaf91ee67b761758a
index = check_index;
}
/* append null terminating byte */
for (; index < n; index++) {
d[index] = 0;
}
return dst;
}
utf8_int8_t* utf8ndup(const utf8_int8_t* src, size_t n) {
return utf8ndup_ex(src, n, utf8_null, utf8_null);
}
utf8_int8_t* utf8ndup_ex(const utf8_int8_t* src, size_t n,
utf8_int8_t* (*alloc_func_ptr)(utf8_int8_t*, size_t),
utf8_int8_t* user_data) {
utf8_int8_t* c = utf8_null;
size_t bytes = 0;
/* Find the end of the string or stop when n is reached */
while ('\0' != src[bytes] && bytes < n) {
bytes++;
}
/* In case bytes is actually less than n, we need to set it
* to be used later in the copy byte by byte. */
n = bytes;
if (alloc_func_ptr) {
c = alloc_func_ptr(user_data, bytes + 1);
}
else {
#if !defined(UTF8_NO_STD_MALLOC)
c = (utf8_int8_t*)malloc(bytes + 1);
#else
c = utf8_null;
#endif
}
if (utf8_null == c) {
/* out of memory so we bail */
return utf8_null;
}
bytes = 0;
/* copy src byte-by-byte into our new utf8 string */
while ('\0' != src[bytes] && bytes < n) {
c[bytes] = src[bytes];
bytes++;
}
/* append null terminating byte */
c[bytes] = '\0';
return c;
}
utf8_constexpr14_impl utf8_int8_t* utf8rchr(const utf8_int8_t* src, int chr) {
utf8_int8_t* match = utf8_null;
utf8_int8_t c[5] = { '\0', '\0', '\0', '\0', '\0' };
assert(chr >= 0);
if (0 == chr) {
/* being asked to return position of null terminating byte, so
* just run s to the end, and return! */
while ('\0' != *src) {
src++;
}
return (utf8_int8_t*)src;
}
else if (0 == ((int)0xffffff80 & chr)) {
/* 1-byte/7-bit ascii
* (0b0xxxxxxx) */
c[0] = (utf8_int8_t)chr;
}
else if (0 == ((int)0xfffff800 & chr)) {
/* 2-byte/11-bit utf8 code point
* (0b110xxxxx 0b10xxxxxx) */
c[0] = (utf8_int8_t)(0xc0 | (utf8_int8_t)(chr >> 6));
c[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
}
else if (0 == ((int)0xffff0000 & chr)) {
/* 3-byte/16-bit utf8 code point
* (0b1110xxxx 0b10xxxxxx 0b10xxxxxx) */
c[0] = (utf8_int8_t)(0xe0 | (utf8_int8_t)(chr >> 12));
c[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 6) & 0x3f));
c[2] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
}
else { /* if (0 == ((int)0xffe00000 & chr)) { */
/* 4-byte/21-bit utf8 code point
* (0b11110xxx 0b10xxxxxx 0b10xxxxxx 0b10xxxxxx) */
c[0] = (utf8_int8_t)(0xf0 | (utf8_int8_t)(chr >> 18));
c[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 12) & 0x3f));
c[2] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 6) & 0x3f));
c[3] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
}
/* we've created a 2 utf8 codepoint string in c that is
* the utf8 character asked for by chr, and a null
* terminating byte */
while ('\0' != *src) {
size_t offset = 0;
while (src[offset] == c[offset]) {
offset++;
}
if ('\0' == c[offset]) {
/* we found a matching utf8 code point */
match = (utf8_int8_t*)src;
src += offset;
}
else {
src += offset;
/* need to march s along to next utf8 codepoint start
* (the next byte that doesn't match 0b10xxxxxx) */
if ('\0' != *src) {
do {
src++;
} while (0x80 == (0xc0 & *src));
}
}
}
/* return the last match we found (or 0 if no match was found) */
return match;
}
utf8_constexpr14_impl utf8_int8_t* utf8pbrk(const utf8_int8_t* str,
const utf8_int8_t* accept) {
while ('\0' != *str) {
const utf8_int8_t* a = accept;
size_t offset = 0;
while ('\0' != *a) {
/* checking that if *a is the start of a utf8 codepoint
* (it is not 0b10xxxxxx) and we have successfully matched
* a previous character (0 < offset) - we found a match */
if ((0x80 != (0xc0 & *a)) && (0 < offset)) {
return (utf8_int8_t*)str;
}
else {
if (*a == str[offset]) {
/* part of a utf8 codepoint matched, so move our checking
* onwards to the next byte */
offset++;
a++;
}
else {
/* r could be in the middle of an unmatching utf8 code point,
* so we need to march it on to the next character beginning, */
do {
a++;
} while (0x80 == (0xc0 & *a));
/* reset offset too as we found a mismatch */
offset = 0;
}
}
}
/* we found a match on the last utf8 codepoint */
if (0 < offset) {
return (utf8_int8_t*)str;
}
/* the current utf8 codepoint in src did not match accept, but src
* could have been partway through a utf8 codepoint, so we need to
* march it onto the next utf8 codepoint starting byte */
do {
str++;
} while ((0x80 == (0xc0 & *str)));
}
return utf8_null;
}
utf8_constexpr14_impl size_t utf8size(const utf8_int8_t* str) {
return utf8size_lazy(str) + 1;
}
utf8_constexpr14_impl size_t utf8size_lazy(const utf8_int8_t* str) {
return utf8nsize_lazy(str, SIZE_MAX);
}
utf8_constexpr14_impl size_t utf8nsize_lazy(const utf8_int8_t* str, size_t n) {
size_t size = 0;
while (size < n && '\0' != str[size]) {
size++;
}
return size;
}
utf8_constexpr14_impl size_t utf8spn(const utf8_int8_t* src,
const utf8_int8_t* accept) {
size_t chars = 0;
while ('\0' != *src) {
const utf8_int8_t* a = accept;
size_t offset = 0;
while ('\0' != *a) {
/* checking that if *r is the start of a utf8 codepoint
* (it is not 0b10xxxxxx) and we have successfully matched
* a previous character (0 < offset) - we found a match */
if ((0x80 != (0xc0 & *a)) && (0 < offset)) {
/* found a match, so increment the number of utf8 codepoints
* that have matched and stop checking whether any other utf8
* codepoints in a match */
chars++;
src += offset;
offset = 0;
break;
}
else {
if (*a == src[offset]) {
offset++;
a++;
}
else {
/* a could be in the middle of an unmatching utf8 codepoint,
* so we need to march it on to the next character beginning, */
do {
a++;
} while (0x80 == (0xc0 & *a));
/* reset offset too as we found a mismatch */
offset = 0;
}
}
}
/* found a match at the end of *a, so didn't get a chance to test it */
if (0 < offset) {
chars++;
src += offset;
continue;
}
/* if a got to its terminating null byte, then we didn't find a match.
* Return the current number of matched utf8 codepoints */
if ('\0' == *a) {
return chars;
}
}
return chars;
}
utf8_constexpr14_impl utf8_int8_t* utf8str(const utf8_int8_t* haystack,
const utf8_int8_t* needle) {
utf8_int32_t throwaway_codepoint = 0;
/* if needle has no utf8 codepoints before the null terminating
* byte then return haystack */
if ('\0' == *needle) {
return (utf8_int8_t*)haystack;
}
while ('\0' != *haystack) {
const utf8_int8_t* maybeMatch = haystack;
const utf8_int8_t* n = needle;
while (*haystack == *n && (*haystack != '\0' && *n != '\0')) {
n++;
haystack++;
}
if ('\0' == *n) {
/* we found the whole utf8 string for needle in haystack at
* maybeMatch, so return it */
return (utf8_int8_t*)maybeMatch;
}
else {
/* h could be in the middle of an unmatching utf8 codepoint,
* so we need to march it on to the next character beginning
* starting from the current character */
haystack = utf8codepoint(maybeMatch, &throwaway_codepoint);
}
}
/* no match */
return utf8_null;
}
utf8_constexpr14_impl utf8_int8_t* utf8casestr(const utf8_int8_t* haystack,
const utf8_int8_t* needle) {
/* if needle has no utf8 codepoints before the null terminating
* byte then return haystack */
if ('\0' == *needle) {
return (utf8_int8_t*)haystack;
}
for (;;) {
const utf8_int8_t* maybeMatch = haystack;
const utf8_int8_t* n = needle;
utf8_int32_t h_cp = 0, n_cp = 0;
/* Get the next code point and track it */
const utf8_int8_t* nextH = haystack = utf8codepoint(haystack, &h_cp);
n = utf8codepoint(n, &n_cp);
while ((0 != h_cp) && (0 != n_cp)) {
h_cp = utf8lwrcodepoint(h_cp);
n_cp = utf8lwrcodepoint(n_cp);
/* if we find a mismatch, bail out! */
if (h_cp != n_cp) {
break;
}
haystack = utf8codepoint(haystack, &h_cp);
n = utf8codepoint(n, &n_cp);
}
if (0 == n_cp) {
/* we found the whole utf8 string for needle in haystack at
* maybeMatch, so return it */
return (utf8_int8_t*)maybeMatch;
}
if (0 == h_cp) {
/* no match */
return utf8_null;
}
/* Roll back to the next code point in the haystack to test */
haystack = nextH;
}
}
utf8_constexpr14_impl utf8_int8_t* utf8valid(const utf8_int8_t* str) {
return utf8nvalid(str, SIZE_MAX);
}
utf8_constexpr14_impl utf8_int8_t* utf8nvalid(const utf8_int8_t* str,
size_t n) {
const utf8_int8_t* t = str;
size_t consumed = 0;
while ((void)(consumed = (size_t)(str - t)), consumed < n && '\0' != *str) {
const size_t remaining = n - consumed;
if (0xf0 == (0xf8 & *str)) {
/* ensure that there's 4 bytes or more remaining */
if (remaining < 4) {
return (utf8_int8_t*)str;
}
/* ensure each of the 3 following bytes in this 4-byte
* utf8 codepoint began with 0b10xxxxxx */
if ((0x80 != (0xc0 & str[1])) || (0x80 != (0xc0 & str[2])) ||
(0x80 != (0xc0 & str[3]))) {
return (utf8_int8_t*)str;
}
/* ensure that our utf8 codepoint ended after 4 bytes */
if ((remaining != 4) && (0x80 == (0xc0 & str[4]))) {
return (utf8_int8_t*)str;
}
/* ensure that the top 5 bits of this 4-byte utf8
* codepoint were not 0, as then we could have used
* one of the smaller encodings */
if ((0 == (0x07 & str[0])) && (0 == (0x30 & str[1]))) {
return (utf8_int8_t*)str;
}
/* 4-byte utf8 code point (began with 0b11110xxx) */
str += 4;
}
else if (0xe0 == (0xf0 & *str)) {
/* ensure that there's 3 bytes or more remaining */
if (remaining < 3) {
return (utf8_int8_t*)str;
}
/* ensure each of the 2 following bytes in this 3-byte
* utf8 codepoint began with 0b10xxxxxx */
if ((0x80 != (0xc0 & str[1])) || (0x80 != (0xc0 & str[2]))) {
return (utf8_int8_t*)str;
}
/* ensure that our utf8 codepoint ended after 3 bytes */
if ((remaining != 3) && (0x80 == (0xc0 & str[3]))) {
return (utf8_int8_t*)str;
}
/* ensure that the top 5 bits of this 3-byte utf8
* codepoint were not 0, as then we could have used
* one of the smaller encodings */
if ((0 == (0x0f & str[0])) && (0 == (0x20 & str[1]))) {
return (utf8_int8_t*)str;
}
/* 3-byte utf8 code point (began with 0b1110xxxx) */
str += 3;
}
else if (0xc0 == (0xe0 & *str)) {
/* ensure that there's 2 bytes or more remaining */
if (remaining < 2) {
return (utf8_int8_t*)str;
}
/* ensure the 1 following byte in this 2-byte
* utf8 codepoint began with 0b10xxxxxx */
if (0x80 != (0xc0 & str[1])) {
return (utf8_int8_t*)str;
}
/* ensure that our utf8 codepoint ended after 2 bytes */
if ((remaining != 2) && (0x80 == (0xc0 & str[2]))) {
return (utf8_int8_t*)str;
}
/* ensure that the top 4 bits of this 2-byte utf8
* codepoint were not 0, as then we could have used
* one of the smaller encodings */
if (0 == (0x1e & str[0])) {
return (utf8_int8_t*)str;
}
/* 2-byte utf8 code point (began with 0b110xxxxx) */
str += 2;
}
else if (0x00 == (0x80 & *str)) {
/* 1-byte ascii (began with 0b0xxxxxxx) */
str += 1;
}
else {
/* we have an invalid 0b1xxxxxxx utf8 code point entry */
return (utf8_int8_t*)str;
}
}
return utf8_null;
}
int utf8makevalid(utf8_int8_t* str, const utf8_int32_t replacement) {
utf8_int8_t* read = str;
utf8_int8_t* write = read;
const utf8_int8_t r = (utf8_int8_t)replacement;
utf8_int32_t codepoint = 0;
assert(replacement >= 0);
if (replacement > 0x7f) {
return -1;
}
while ('\0' != *read) {
if (0xf0 == (0xf8 & *read)) {
/* ensure each of the 3 following bytes in this 4-byte
* utf8 codepoint began with 0b10xxxxxx */
if ((0x80 != (0xc0 & read[1])) || (0x80 != (0xc0 & read[2])) ||
(0x80 != (0xc0 & read[3]))) {
*write++ = r;
read++;
continue;
}
/* 4-byte utf8 code point (began with 0b11110xxx) */
read = utf8codepoint(read, &codepoint);
write = utf8catcodepoint(write, codepoint, 4);
}
else if (0xe0 == (0xf0 & *read)) {
/* ensure each of the 2 following bytes in this 3-byte
* utf8 codepoint began with 0b10xxxxxx */
if ((0x80 != (0xc0 & read[1])) || (0x80 != (0xc0 & read[2]))) {
*write++ = r;
read++;
continue;
}
/* 3-byte utf8 code point (began with 0b1110xxxx) */
read = utf8codepoint(read, &codepoint);
write = utf8catcodepoint(write, codepoint, 3);
}
else if (0xc0 == (0xe0 & *read)) {
/* ensure the 1 following byte in this 2-byte
* utf8 codepoint began with 0b10xxxxxx */
if (0x80 != (0xc0 & read[1])) {
*write++ = r;
read++;
continue;
}
/* 2-byte utf8 code point (began with 0b110xxxxx) */
read = utf8codepoint(read, &codepoint);
write = utf8catcodepoint(write, codepoint, 2);
}
else if (0x00 == (0x80 & *read)) {
/* 1-byte ascii (began with 0b0xxxxxxx) */
read = utf8codepoint(read, &codepoint);
write = utf8catcodepoint(write, codepoint, 1);
}
else {
/* if we got here then we've got a dangling continuation (0b10xxxxxx) */
*write++ = r;
read++;
continue;
}
}
*write = '\0';
return 0;
}
utf8_constexpr14_impl utf8_int8_t*
utf8codepoint(const utf8_int8_t* utf8_restrict str,
utf8_int32_t* utf8_restrict out_codepoint) {
if (0xf0 == (0xf8 & str[0])) {
/* 4 byte utf8 codepoint */
*out_codepoint = ((0x07 & str[0]) << 18) | ((0x3f & str[1]) << 12) |
((0x3f & str[2]) << 6) | (0x3f & str[3]);
str += 4;
}
else if (0xe0 == (0xf0 & str[0])) {
/* 3 byte utf8 codepoint */
*out_codepoint =
((0x0f & str[0]) << 12) | ((0x3f & str[1]) << 6) | (0x3f & str[2]);
str += 3;
}
else if (0xc0 == (0xe0 & str[0])) {
/* 2 byte utf8 codepoint */
*out_codepoint = ((0x1f & str[0]) << 6) | (0x3f & str[1]);
str += 2;
}
else {
/* 1 byte utf8 codepoint otherwise */
// rg - OMG
*out_codepoint = (uint8_t)str[0];
str += 1;
}
assert(*out_codepoint >= 0);
return (utf8_int8_t*)str;
}
utf8_constexpr14_impl size_t utf8codepointcalcsize(const utf8_int8_t* str) {
if (0xf0 == (0xf8 & str[0])) {
/* 4 byte utf8 codepoint */
return 4;
}
else if (0xe0 == (0xf0 & str[0])) {
/* 3 byte utf8 codepoint */
return 3;
}
else if (0xc0 == (0xe0 & str[0])) {
/* 2 byte utf8 codepoint */
return 2;
}
/* 1 byte utf8 codepoint otherwise */
return 1;
}
utf8_constexpr14_impl size_t utf8codepointsize(utf8_int32_t chr) {
assert(chr >= 0);
if (0 == ((utf8_int32_t)0xffffff80 & chr)) {
return 1;
}
else if (0 == ((utf8_int32_t)0xfffff800 & chr)) {
return 2;
}
else if (0 == ((utf8_int32_t)0xffff0000 & chr)) {
return 3;
}
else { /* if (0 == ((int)0xffe00000 & chr)) { */
return 4;
}
}
utf8_int8_t* utf8catcodepoint(utf8_int8_t* str, utf8_int32_t chr, size_t n) {
assert(chr >= 0);
if (0 == ((utf8_int32_t)0xffffff80 & chr)) {
/* 1-byte/7-bit ascii
* (0b0xxxxxxx) */
if (n < 1) {
return utf8_null;
}
str[0] = (utf8_int8_t)chr;
str += 1;
}
else if (0 == ((utf8_int32_t)0xfffff800 & chr)) {
/* 2-byte/11-bit utf8 code point
* (0b110xxxxx 0b10xxxxxx) */
if (n < 2) {
return utf8_null;
}
str[0] = (utf8_int8_t)(0xc0 | (utf8_int8_t)((chr >> 6) & 0x1f));
str[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
str += 2;
}
else if (0 == ((utf8_int32_t)0xffff0000 & chr)) {
/* 3-byte/16-bit utf8 code point
* (0b1110xxxx 0b10xxxxxx 0b10xxxxxx) */
if (n < 3) {
return utf8_null;
}
str[0] = (utf8_int8_t)(0xe0 | (utf8_int8_t)((chr >> 12) & 0x0f));
str[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 6) & 0x3f));
str[2] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
str += 3;
}
else { /* if (0 == ((int)0xffe00000 & chr)) { */
/* 4-byte/21-bit utf8 code point
* (0b11110xxx 0b10xxxxxx 0b10xxxxxx 0b10xxxxxx) */
if (n < 4) {
return utf8_null;
}
str[0] = (utf8_int8_t)(0xf0 | (utf8_int8_t)((chr >> 18) & 0x07));
str[1] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 12) & 0x3f));
str[2] = (utf8_int8_t)(0x80 | (utf8_int8_t)((chr >> 6) & 0x3f));
str[3] = (utf8_int8_t)(0x80 | (utf8_int8_t)(chr & 0x3f));
str += 4;
}
return str;
}
utf8_constexpr14_impl int utf8islower(utf8_int32_t chr) {
assert(chr >= 0);
return chr != utf8uprcodepoint(chr);
}
utf8_constexpr14_impl int utf8isupper(utf8_int32_t chr) {
assert(chr >= 0);
return chr != utf8lwrcodepoint(chr);
}
void utf8lwr(utf8_int8_t* utf8_restrict str) {
utf8_int32_t cp = 0;
utf8_int8_t* pn = utf8codepoint(str, &cp);
while (cp != 0) {
const utf8_int32_t lwr_cp = utf8lwrcodepoint(cp);
const size_t size = utf8codepointsize(lwr_cp);
if (lwr_cp != cp) {
utf8catcodepoint(str, lwr_cp, size);
}
str = pn;
pn = utf8codepoint(str, &cp);
}
}
void utf8upr(utf8_int8_t* utf8_restrict str) {
utf8_int32_t cp = 0;
utf8_int8_t* pn = utf8codepoint(str, &cp);
while (cp != 0) {
const utf8_int32_t lwr_cp = utf8uprcodepoint(cp);
const size_t size = utf8codepointsize(lwr_cp);
if (lwr_cp != cp) {
utf8catcodepoint(str, lwr_cp, size);
}
str = pn;
pn = utf8codepoint(str, &cp);
}
}
utf8_constexpr14_impl utf8_int32_t utf8lwrcodepoint(utf8_int32_t cp) {
assert(cp >= 0);
if (((0x0041 <= cp) && (0x005a >= cp)) ||
((0x00c0 <= cp) && (0x00d6 >= cp)) ||
((0x00d8 <= cp) && (0x00de >= cp)) ||
((0x0391 <= cp) && (0x03a1 >= cp)) ||
((0x03a3 <= cp) && (0x03ab >= cp)) ||
((0x0410 <= cp) && (0x042f >= cp))) {
cp += 32;
}
else if ((0x0400 <= cp) && (0x040f >= cp)) {
cp += 80;
}
else if (((0x0100 <= cp) && (0x012f >= cp)) ||
((0x0132 <= cp) && (0x0137 >= cp)) ||
((0x014a <= cp) && (0x0177 >= cp)) ||
((0x0182 <= cp) && (0x0185 >= cp)) ||
((0x01a0 <= cp) && (0x01a5 >= cp)) ||
((0x01de <= cp) && (0x01ef >= cp)) ||
((0x01f8 <= cp) && (0x021f >= cp)) ||
((0x0222 <= cp) && (0x0233 >= cp)) ||
((0x0246 <= cp) && (0x024f >= cp)) ||
((0x03d8 <= cp) && (0x03ef >= cp)) ||
((0x0460 <= cp) && (0x0481 >= cp)) ||
((0x048a <= cp) && (0x04ff >= cp))) {
cp |= 0x1;
}
else if (((0x0139 <= cp) && (0x0148 >= cp)) ||
((0x0179 <= cp) && (0x017e >= cp)) ||
((0x01af <= cp) && (0x01b0 >= cp)) ||
((0x01b3 <= cp) && (0x01b6 >= cp)) ||
((0x01cd <= cp) && (0x01dc >= cp))) {
cp += 1;
cp &= ~0x1;
}
else {
switch (cp) {
default:
break;
case 0x0178:
cp = 0x00ff;
break;
case 0x0243:
cp = 0x0180;
break;
case 0x018e:
cp = 0x01dd;
break;
case 0x023d:
cp = 0x019a;
break;
case 0x0220:
cp = 0x019e;
break;
case 0x01b7:
cp = 0x0292;
break;
case 0x01c4:
cp = 0x01c6;
break;
case 0x01c7:
cp = 0x01c9;
break;
case 0x01ca:
cp = 0x01cc;
break;
case 0x01f1:
cp = 0x01f3;
break;
case 0x01f7:
cp = 0x01bf;
break;
case 0x0187:
cp = 0x0188;
break;
case 0x018b:
cp = 0x018c;
break;
case 0x0191:
cp = 0x0192;
break;
case 0x0198:
cp = 0x0199;
break;
case 0x01a7:
cp = 0x01a8;
break;
case 0x01ac:
cp = 0x01ad;
break;
case 0x01af:
cp = 0x01b0;
break;
case 0x01b8:
cp = 0x01b9;
break;
case 0x01bc:
cp = 0x01bd;
break;
case 0x01f4:
cp = 0x01f5;
break;
case 0x023b:
cp = 0x023c;
break;
case 0x0241:
cp = 0x0242;
break;
case 0x03fd:
cp = 0x037b;
break;
case 0x03fe:
cp = 0x037c;
break;
case 0x03ff:
cp = 0x037d;
break;
case 0x037f:
cp = 0x03f3;
break;
case 0x0386:
cp = 0x03ac;
break;
case 0x0388:
cp = 0x03ad;
break;
case 0x0389:
cp = 0x03ae;
break;
case 0x038a:
cp = 0x03af;
break;
case 0x038c:
cp = 0x03cc;
break;
case 0x038e:
cp = 0x03cd;
break;
case 0x038f:
cp = 0x03ce;
break;
case 0x0370:
cp = 0x0371;
break;
case 0x0372:
cp = 0x0373;
break;
case 0x0376:
cp = 0x0377;
break;
case 0x03f4:
cp = 0x03b8;
break;
case 0x03cf:
cp = 0x03d7;
break;
case 0x03f9:
cp = 0x03f2;
break;
case 0x03f7:
cp = 0x03f8;
break;
case 0x03fa:
cp = 0x03fb;
break;
}
}
return cp;
}
utf8_constexpr14_impl utf8_int32_t utf8uprcodepoint(utf8_int32_t cp) {
assert(cp >= 0);
if (((0x0061 <= cp) && (0x007a >= cp)) ||
((0x00e0 <= cp) && (0x00f6 >= cp)) ||
((0x00f8 <= cp) && (0x00fe >= cp)) ||
((0x03b1 <= cp) && (0x03c1 >= cp)) ||
((0x03c3 <= cp) && (0x03cb >= cp)) ||
((0x0430 <= cp) && (0x044f >= cp))) {
cp -= 32;
}
else if ((0x0450 <= cp) && (0x045f >= cp)) {
cp -= 80;
}
else if (((0x0100 <= cp) && (0x012f >= cp)) ||
((0x0132 <= cp) && (0x0137 >= cp)) ||
((0x014a <= cp) && (0x0177 >= cp)) ||
((0x0182 <= cp) && (0x0185 >= cp)) ||
((0x01a0 <= cp) && (0x01a5 >= cp)) ||
((0x01de <= cp) && (0x01ef >= cp)) ||
((0x01f8 <= cp) && (0x021f >= cp)) ||
((0x0222 <= cp) && (0x0233 >= cp)) ||
((0x0246 <= cp) && (0x024f >= cp)) ||
((0x03d8 <= cp) && (0x03ef >= cp)) ||
((0x0460 <= cp) && (0x0481 >= cp)) ||
((0x048a <= cp) && (0x04ff >= cp))) {
cp &= ~0x1;
}
else if (((0x0139 <= cp) && (0x0148 >= cp)) ||
((0x0179 <= cp) && (0x017e >= cp)) ||
((0x01af <= cp) && (0x01b0 >= cp)) ||
((0x01b3 <= cp) && (0x01b6 >= cp)) ||
((0x01cd <= cp) && (0x01dc >= cp))) {
cp -= 1;
cp |= 0x1;
}
else {
switch (cp) {
default:
break;
case 0x00ff:
cp = 0x0178;
break;
case 0x0180:
cp = 0x0243;
break;
case 0x01dd:
cp = 0x018e;
break;
case 0x019a:
cp = 0x023d;
break;
case 0x019e:
cp = 0x0220;
break;
case 0x0292:
cp = 0x01b7;
break;
case 0x01c6:
cp = 0x01c4;
break;
case 0x01c9:
cp = 0x01c7;
break;
case 0x01cc:
cp = 0x01ca;
break;
case 0x01f3:
cp = 0x01f1;
break;
case 0x01bf:
cp = 0x01f7;
break;
case 0x0188:
cp = 0x0187;
break;
case 0x018c:
cp = 0x018b;
break;
case 0x0192:
cp = 0x0191;
break;
case 0x0199:
cp = 0x0198;
break;
case 0x01a8:
cp = 0x01a7;
break;
case 0x01ad:
cp = 0x01ac;
break;
case 0x01b0:
cp = 0x01af;
break;
case 0x01b9:
cp = 0x01b8;
break;
case 0x01bd:
cp = 0x01bc;
break;
case 0x01f5:
cp = 0x01f4;
break;
case 0x023c:
cp = 0x023b;
break;
case 0x0242:
cp = 0x0241;
break;
case 0x037b:
cp = 0x03fd;
break;
case 0x037c:
cp = 0x03fe;
break;
case 0x037d:
cp = 0x03ff;
break;
case 0x03f3:
cp = 0x037f;
break;
case 0x03ac:
cp = 0x0386;
break;
case 0x03ad:
cp = 0x0388;
break;
case 0x03ae:
cp = 0x0389;
break;
case 0x03af:
cp = 0x038a;
break;
case 0x03cc:
cp = 0x038c;
break;
case 0x03cd:
cp = 0x038e;
break;
case 0x03ce:
cp = 0x038f;
break;
case 0x0371:
cp = 0x0370;
break;
case 0x0373:
cp = 0x0372;
break;
case 0x0377:
cp = 0x0376;
break;
case 0x03d1:
cp = 0x0398;
break;
case 0x03d7:
cp = 0x03cf;
break;
case 0x03f2:
cp = 0x03f9;
break;
case 0x03f8:
cp = 0x03f7;
break;
case 0x03fb:
cp = 0x03fa;
break;
}
}
return cp;
}
utf8_constexpr14_impl utf8_int8_t*
utf8rcodepoint(const utf8_int8_t* utf8_restrict str,
utf8_int32_t* utf8_restrict out_codepoint) {
const utf8_int8_t* s = (const utf8_int8_t*)str;
if (0xf0 == (0xf8 & s[0])) {
/* 4 byte utf8 codepoint */
*out_codepoint = ((0x07 & s[0]) << 18) | ((0x3f & s[1]) << 12) |
((0x3f & s[2]) << 6) | (0x3f & s[3]);
}
else if (0xe0 == (0xf0 & s[0])) {
/* 3 byte utf8 codepoint */
*out_codepoint =
((0x0f & s[0]) << 12) | ((0x3f & s[1]) << 6) | (0x3f & s[2]);
}
else if (0xc0 == (0xe0 & s[0])) {
/* 2 byte utf8 codepoint */
*out_codepoint = ((0x1f & s[0]) << 6) | (0x3f & s[1]);
}
else {
/* 1 byte utf8 codepoint otherwise */
*out_codepoint = (uint8_t)s[0];
}
do {
s--;
} while ((0 != (0x80 & s[0])) && (0x80 == (0xc0 & s[0])));
assert(*out_codepoint >= 0);
return (utf8_int8_t*)s;
}
#undef utf8_restrict
#undef utf8_constexpr14
#undef utf8_null
#ifdef __cplusplus
} /* extern "C" */
#endif
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
#endif /* SHEREDOM_UTF8_H_INCLUDED */
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