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-rw-r--r--src/external/utf8.h1258
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diff --git a/src/external/utf8.h b/src/external/utf8.h
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--- a/src/external/utf8.h
+++ /dev/null
@@ -1,1258 +0,0 @@
-// 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 'bytes padding added after construct' warning
-#pragma warning(disable : 4820)
-#endif
-
-#include <stddef.h>
-#include <stdlib.h>
-
-#if defined(_MSC_VER)
-#pragma warning(pop)
-#endif
-
-#if defined(_MSC_VER)
-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(__clang__) || defined(__GNUC__)
-#define utf8_nonnull __attribute__((nonnull))
-#define utf8_pure __attribute__((pure))
-#define utf8_restrict __restrict__
-#define utf8_weak __attribute__((weak))
-#elif defined(_MSC_VER)
-#define utf8_nonnull
-#define utf8_pure
-#define utf8_restrict __restrict
-#define utf8_weak __inline
-#else
-#error Non clang, non gcc, non MSVC compiler found!
-#endif
-
-#ifdef __cplusplus
-#define utf8_null NULL
-#else
-#define utf8_null 0
-#endif
-
- // Return less than 0, 0, greater than 0 if src1 < src2, src1 == src2, src1 >
- // src2 respectively, case insensitive.
- utf8_nonnull utf8_pure utf8_weak int utf8casecmp(const void *src1,
- const void *src2);
-
- // Append the utf8 string src onto the utf8 string dst.
- utf8_nonnull utf8_weak void *utf8cat(void *utf8_restrict dst,
- const void *utf8_restrict src);
-
- // Find the first match of the utf8 codepoint chr in the utf8 string src.
- utf8_nonnull utf8_pure utf8_weak void *utf8chr(const void *src,
- utf8_int32_t chr);
-
- // Return less than 0, 0, greater than 0 if src1 < src2,
- // src1 == src2, src1 > src2 respectively.
- utf8_nonnull utf8_pure utf8_weak int utf8cmp(const void *src1,
- const void *src2);
-
- // Copy the utf8 string src onto the memory allocated in dst.
- utf8_nonnull utf8_weak void *utf8cpy(void *utf8_restrict dst,
- const void *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_nonnull utf8_pure utf8_weak size_t utf8cspn(const void *src,
- const void *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_nonnull utf8_weak void *utf8dup(const void *src);
-
- // Number of utf8 codepoints in the utf8 string str,
- // excluding the null terminating byte.
- utf8_nonnull utf8_pure utf8_weak size_t utf8len(const void *str);
-
- // 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_nonnull utf8_pure utf8_weak int utf8ncasecmp(const void *src1,
- const void *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 void *utf8ncat(void *utf8_restrict dst,
- const void *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_nonnull utf8_pure utf8_weak int utf8ncmp(const void *src1,
- const void *src2, size_t n);
-
- // Copy the utf8 string src onto the memory allocated in dst.
- // Copies at most n bytes. If there is no terminating null byte in
- // the first n bytes of src, the string placed into dst will not be
- // null-terminated. If the size (in bytes) of src is less than n,
- // extra null terminating bytes are appended to dst such that at
- // total of n bytes are written. Can produce an invalid utf8
- // string if n falls partway through a utf8 codepoint.
- utf8_nonnull utf8_weak void *utf8ncpy(void *utf8_restrict dst,
- const void *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_nonnull utf8_weak void *utf8ndup(const void *src, size_t n);
-
- // Locates the first occurence in the utf8 string str of any byte in the
- // utf8 string accept, or 0 if no match was found.
- utf8_nonnull utf8_pure utf8_weak void *utf8pbrk(const void *str,
- const void *accept);
-
- // Find the last match of the utf8 codepoint chr in the utf8 string src.
- utf8_nonnull utf8_pure utf8_weak void *utf8rchr(const void *src, int chr);
-
- // Number of bytes in the utf8 string str,
- // including the null terminating byte.
- utf8_nonnull utf8_pure utf8_weak size_t utf8size(const void *str);
-
- // Number of utf8 codepoints in the utf8 string src that consists entirely
- // of utf8 codepoints from the utf8 string accept.
- utf8_nonnull utf8_pure utf8_weak size_t utf8spn(const void *src,
- const void *accept);
-
- // The position of the utf8 string needle in the utf8 string haystack.
- utf8_nonnull utf8_pure utf8_weak void *utf8str(const void *haystack,
- const void *needle);
-
- // The position of the utf8 string needle in the utf8 string haystack, case
- // insensitive.
- utf8_nonnull utf8_pure utf8_weak void *utf8casestr(const void *haystack,
- const void *needle);
-
- // Return 0 on success, or the position of the invalid
- // utf8 codepoint on failure.
- utf8_nonnull utf8_pure utf8_weak void *utf8valid(const void *str);
-
- // Sets out_codepoint to the next utf8 codepoint in str, and returns the address
- // of the utf8 codepoint after the current one in str.
- utf8_nonnull utf8_weak void *
- utf8codepoint(const void *utf8_restrict str,
- utf8_int32_t *utf8_restrict out_codepoint);
-
- // Returns the size of the given codepoint in bytes.
- utf8_weak 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 void *utf8catcodepoint(void *utf8_restrict str,
- utf8_int32_t chr, size_t n);
-
- // Returns 1 if the given character is lowercase, or 0 if it is not.
- utf8_weak int utf8islower(utf8_int32_t chr);
-
- // Returns 1 if the given character is uppercase, or 0 if it is not.
- utf8_weak int utf8isupper(utf8_int32_t chr);
-
- // Transform the given string into all lowercase codepoints.
- utf8_nonnull utf8_weak void utf8lwr(void *utf8_restrict str);
-
- // Transform the given string into all uppercase codepoints.
- utf8_nonnull utf8_weak void utf8upr(void *utf8_restrict str);
-
- // Make a codepoint lower case if possible.
- utf8_weak utf8_int32_t utf8lwrcodepoint(utf8_int32_t cp);
-
- // Make a codepoint upper case if possible.
- utf8_weak utf8_int32_t utf8uprcodepoint(utf8_int32_t cp);
-
-#undef utf8_weak
-#undef utf8_pure
-#undef utf8_nonnull
-
- int utf8casecmp(const void *src1, const void *src2) {
- utf8_int32_t src1_cp, src2_cp, src1_orig_cp, src2_orig_cp;
-
- for (;;) {
- src1 = utf8codepoint(src1, &src1_cp);
- src2 = utf8codepoint(src2, &src2_cp);
-
- // take a copy of src1 & src2
- src1_orig_cp = src1_cp;
- src2_orig_cp = src2_cp;
-
- // lower the srcs if required
- src1_cp = utf8lwrcodepoint(src1_cp);
- src2_cp = utf8lwrcodepoint(src2_cp);
-
- // check if the lowered codepoints match
- if ((0 == src1_orig_cp) && (0 == src2_orig_cp)) {
- return 0;
- } else if (src1_cp == src2_cp) {
- continue;
- }
-
- // if they don't match, then we return the difference between the characters
- return src1_cp - src2_cp;
- }
- }
-
- void *utf8cat(void *utf8_restrict dst, const void *utf8_restrict src) {
- char *d = (char *)dst;
- const char *s = (const char *)src;
-
- // 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' != *s) {
- *d++ = *s++;
- }
-
- // write out a new null terminating byte into dst
- *d = '\0';
-
- return dst;
- }
-
- void *utf8chr(const void *src, utf8_int32_t chr) {
- char c[5] = {'\0', '\0', '\0', '\0', '\0'};
-
- if (0 == chr) {
- // being asked to return position of null terminating byte, so
- // just run s to the end, and return!
- const char *s = (const char *)src;
- while ('\0' != *s) {
- s++;
- }
- return (void *)s;
- } else if (0 == ((utf8_int32_t)0xffffff80 & chr)) {
- // 1-byte/7-bit ascii
- // (0b0xxxxxxx)
- c[0] = (char)chr;
- } else if (0 == ((utf8_int32_t)0xfffff800 & chr)) {
- // 2-byte/11-bit utf8 code point
- // (0b110xxxxx 0b10xxxxxx)
- c[0] = 0xc0 | (char)(chr >> 6);
- c[1] = 0x80 | (char)(chr & 0x3f);
- } else if (0 == ((utf8_int32_t)0xffff0000 & chr)) {
- // 3-byte/16-bit utf8 code point
- // (0b1110xxxx 0b10xxxxxx 0b10xxxxxx)
- c[0] = 0xe0 | (char)(chr >> 12);
- c[1] = 0x80 | (char)((chr >> 6) & 0x3f);
- c[2] = 0x80 | (char)(chr & 0x3f);
- } else { // if (0 == ((int)0xffe00000 & chr)) {
- // 4-byte/21-bit utf8 code point
- // (0b11110xxx 0b10xxxxxx 0b10xxxxxx 0b10xxxxxx)
- c[0] = 0xf0 | (char)(chr >> 18);
- c[1] = 0x80 | (char)((chr >> 12) & 0x3f);
- c[2] = 0x80 | (char)((chr >> 6) & 0x3f);
- c[3] = 0x80 | (char)(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);
- }
-
- int utf8cmp(const void *src1, const void *src2) {
- const unsigned char *s1 = (const unsigned char *)src1;
- const unsigned char *s2 = (const unsigned char *)src2;
-
- while (('\0' != *s1) || ('\0' != *s2)) {
- if (*s1 < *s2) {
- return -1;
- } else if (*s1 > *s2) {
- return 1;
- }
-
- s1++;
- s2++;
- }
-
- // both utf8 strings matched
- return 0;
- }
-
- int utf8coll(const void *src1, const void *src2);
-
- void *utf8cpy(void *utf8_restrict dst, const void *utf8_restrict src) {
- char *d = (char *)dst;
- const char *s = (const char *)src;
-
- // overwriting anything previously in dst, write byte-by-byte
- // from src
- while ('\0' != *s) {
- *d++ = *s++;
- }
-
- // append null terminating byte
- *d = '\0';
-
- return dst;
- }
-
- size_t utf8cspn(const void *src, const void *reject) {
- const char *s = (const char *)src;
- size_t chars = 0;
-
- while ('\0' != *s) {
- const char *r = (const char *)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 == s[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;
- }
- }
- }
-
- // 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 {
- s++;
- } while ((0x80 == (0xc0 & *s)));
- chars++;
- }
-
- return chars;
- }
-
- size_t utf8size(const void *str);
-
- void *utf8dup(const void *src) {
- const char *s = (const char *)src;
- char *n = utf8_null;
-
- // figure out how many bytes (including the terminator) we need to copy first
- size_t bytes = utf8size(src);
-
- n = (char *)malloc(bytes);
-
- 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' != s[bytes]) {
- n[bytes] = s[bytes];
- bytes++;
- }
-
- // append null terminating byte
- n[bytes] = '\0';
- return n;
- }
- }
-
- void *utf8fry(const void *str);
-
- size_t utf8len(const void *str) {
- const unsigned char *s = (const unsigned char *)str;
- size_t length = 0;
-
- while ('\0' != *s) {
- if (0xf0 == (0xf8 & *s)) {
- // 4-byte utf8 code point (began with 0b11110xxx)
- s += 4;
- } else if (0xe0 == (0xf0 & *s)) {
- // 3-byte utf8 code point (began with 0b1110xxxx)
- s += 3;
- } else if (0xc0 == (0xe0 & *s)) {
- // 2-byte utf8 code point (began with 0b110xxxxx)
- s += 2;
- } else { // if (0x00 == (0x80 & *s)) {
- // 1-byte ascii (began with 0b0xxxxxxx)
- s += 1;
- }
-
- // no matter the bytes we marched s forward by, it was
- // only 1 utf8 codepoint
- length++;
- }
-
- return length;
- }
-
- int utf8ncasecmp(const void *src1, const void *src2, size_t n) {
- utf8_int32_t src1_cp, src2_cp, src1_orig_cp, src2_orig_cp;
-
- do {
- const unsigned char *const s1 = (const unsigned char *)src1;
- const unsigned char *const s2 = (const unsigned char *)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 -1;
- } else if (c1 > c2) {
- return 1;
- } 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 -1;
- } else if (c1 > c2) {
- return 1;
- } 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 -1;
- } else if (c1 > c2) {
- return 1;
- } else {
- return 0;
- }
- }
-
- src1 = utf8codepoint(src1, &src1_cp);
- src2 = utf8codepoint(src2, &src2_cp);
- n -= utf8codepointsize(src1_cp);
-
- // Take a copy of src1 & src2
- src1_orig_cp = src1_cp;
- src2_orig_cp = src2_cp;
-
- // Lower srcs if required
- src1_cp = utf8lwrcodepoint(src1_cp);
- src2_cp = utf8lwrcodepoint(src2_cp);
-
- // Check if the lowered codepoints match
- if ((0 == src1_orig_cp) && (0 == src2_orig_cp)) {
- return 0;
- } else if (src1_cp == src2_cp) {
- continue;
- }
-
- // If they don't match, then we return which of the original's are less
- if (src1_orig_cp < src2_orig_cp) {
- return -1;
- } else if (src1_orig_cp > src2_orig_cp) {
- return 1;
- }
- } while (0 < n);
-
- // both utf8 strings matched
- return 0;
- }
-
- void *utf8ncat(void *utf8_restrict dst, const void *utf8_restrict src,
- size_t n) {
- char *d = (char *)dst;
- const char *s = (const char *)src;
-
- // 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
- do {
- *d++ = *s++;
- } while (('\0' != *s) && (0 != --n));
-
- // write out a new null terminating byte into dst
- *d = '\0';
-
- return dst;
- }
-
- int utf8ncmp(const void *src1, const void *src2, size_t n) {
- const unsigned char *s1 = (const unsigned char *)src1;
- const unsigned char *s2 = (const unsigned char *)src2;
-
- while ((0 != n--) && (('\0' != *s1) || ('\0' != *s2))) {
- if (*s1 < *s2) {
- return -1;
- } else if (*s1 > *s2) {
- return 1;
- }
-
- s1++;
- s2++;
- }
-
- // both utf8 strings matched
- return 0;
- }
-
- void *utf8ncpy(void *utf8_restrict dst, const void *utf8_restrict src,
- size_t n) {
- char *d = (char *)dst;
- const char *s = (const char *)src;
- size_t index;
-
- // overwriting anything previously in dst, write byte-by-byte
- // from src
- for (index = 0; index < n; index++) {
- d[index] = s[index];
- if ('\0' == s[index]) {
- break;
- }
- }
-
- // append null terminating byte
- for (; index < n; index++) {
- d[index] = 0;
- }
-
- return dst;
- }
-
- void *utf8ndup(const void *src, size_t n) {
- const char *s = (const char *)src;
- char *c = utf8_null;
- size_t bytes = 0;
-
- // Find the end of the string or stop when n is reached
- while ('\0' != s[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;
-
- c = (char *)malloc(bytes + 1);
- 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' != s[bytes] && bytes < n) {
- c[bytes] = s[bytes];
- bytes++;
- }
-
- // append null terminating byte
- c[bytes] = '\0';
- return c;
- }
-
- void *utf8rchr(const void *src, int chr) {
- const char *s = (const char *)src;
- const char *match = utf8_null;
- char c[5] = {'\0', '\0', '\0', '\0', '\0'};
-
- if (0 == chr) {
- // being asked to return position of null terminating byte, so
- // just run s to the end, and return!
- while ('\0' != *s) {
- s++;
- }
- return (void *)s;
- } else if (0 == ((int)0xffffff80 & chr)) {
- // 1-byte/7-bit ascii
- // (0b0xxxxxxx)
- c[0] = (char)chr;
- } else if (0 == ((int)0xfffff800 & chr)) {
- // 2-byte/11-bit utf8 code point
- // (0b110xxxxx 0b10xxxxxx)
- c[0] = 0xc0 | (char)(chr >> 6);
- c[1] = 0x80 | (char)(chr & 0x3f);
- } else if (0 == ((int)0xffff0000 & chr)) {
- // 3-byte/16-bit utf8 code point
- // (0b1110xxxx 0b10xxxxxx 0b10xxxxxx)
- c[0] = 0xe0 | (char)(chr >> 12);
- c[1] = 0x80 | (char)((chr >> 6) & 0x3f);
- c[2] = 0x80 | (char)(chr & 0x3f);
- } else { // if (0 == ((int)0xffe00000 & chr)) {
- // 4-byte/21-bit utf8 code point
- // (0b11110xxx 0b10xxxxxx 0b10xxxxxx 0b10xxxxxx)
- c[0] = 0xf0 | (char)(chr >> 18);
- c[1] = 0x80 | (char)((chr >> 12) & 0x3f);
- c[2] = 0x80 | (char)((chr >> 6) & 0x3f);
- c[3] = 0x80 | (char)(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' != *s) {
- size_t offset = 0;
-
- while (s[offset] == c[offset]) {
- offset++;
- }
-
- if ('\0' == c[offset]) {
- // we found a matching utf8 code point
- match = s;
- s += offset;
- } else {
- s += offset;
-
- // need to march s along to next utf8 codepoint start
- // (the next byte that doesn't match 0b10xxxxxx)
- if ('\0' != *s) {
- do {
- s++;
- } while (0x80 == (0xc0 & *s));
- }
- }
- }
-
- // return the last match we found (or 0 if no match was found)
- return (void *)match;
- }
-
- void *utf8pbrk(const void *str, const void *accept) {
- const char *s = (const char *)str;
-
- while ('\0' != *s) {
- const char *a = (const char *)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 (void *)s;
- } else {
- if (*a == s[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 (void *)s;
- }
-
- // 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 {
- s++;
- } while ((0x80 == (0xc0 & *s)));
- }
-
- return utf8_null;
- }
-
- size_t utf8size(const void *str) {
- const char *s = (const char *)str;
- size_t size = 0;
- while ('\0' != s[size]) {
- size++;
- }
-
- // we are including the null terminating byte in the size calculation
- size++;
- return size;
- }
-
- size_t utf8spn(const void *src, const void *accept) {
- const char *s = (const char *)src;
- size_t chars = 0;
-
- while ('\0' != *s) {
- const char *a = (const char *)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++;
- s += offset;
- break;
- } else {
- if (*a == s[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;
- }
- }
- }
-
- // 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;
- }
-
- void *utf8str(const void *haystack, const void *needle) {
- const char *h = (const char *)haystack;
- utf8_int32_t throwaway_codepoint;
-
- // if needle has no utf8 codepoints before the null terminating
- // byte then return haystack
- if ('\0' == *((const char *)needle)) {
- return (void *)haystack;
- }
-
- while ('\0' != *h) {
- const char *maybeMatch = h;
- const char *n = (const char *)needle;
-
- while (*h == *n && (*h != '\0' && *n != '\0')) {
- n++;
- h++;
- }
-
- if ('\0' == *n) {
- // we found the whole utf8 string for needle in haystack at
- // maybeMatch, so return it
- return (void *)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
- h = (const char*)utf8codepoint(maybeMatch, &throwaway_codepoint);
- }
- }
-
- // no match
- return utf8_null;
- }
-
- void *utf8casestr(const void *haystack, const void *needle) {
- const void *h = haystack;
-
- // if needle has no utf8 codepoints before the null terminating
- // byte then return haystack
- if ('\0' == *((const char *)needle)) {
- return (void *)haystack;
- }
-
- for (;;) {
- const void *maybeMatch = h;
- const void *n = needle;
- utf8_int32_t h_cp, n_cp;
-
- // Get the next code point and track it
- const void *nextH = h = utf8codepoint(h, &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;
- }
-
- h = utf8codepoint(h, &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 (void *)maybeMatch;
- }
-
- if (0 == h_cp) {
- // no match
- return utf8_null;
- }
-
- // Roll back to the next code point in the haystack to test
- h = nextH;
- }
- }
-
- void *utf8valid(const void *str) {
- const char *s = (const char *)str;
-
- while ('\0' != *s) {
- if (0xf0 == (0xf8 & *s)) {
- // ensure each of the 3 following bytes in this 4-byte
- // utf8 codepoint began with 0b10xxxxxx
- if ((0x80 != (0xc0 & s[1])) || (0x80 != (0xc0 & s[2])) ||
- (0x80 != (0xc0 & s[3]))) {
- return (void *)s;
- }
-
- // ensure that our utf8 codepoint ended after 4 bytes
- if (0x80 == (0xc0 & s[4])) {
- return (void *)s;
- }
-
- // 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 & s[0])) && (0 == (0x30 & s[1]))) {
- return (void *)s;
- }
-
- // 4-byte utf8 code point (began with 0b11110xxx)
- s += 4;
- } else if (0xe0 == (0xf0 & *s)) {
- // ensure each of the 2 following bytes in this 3-byte
- // utf8 codepoint began with 0b10xxxxxx
- if ((0x80 != (0xc0 & s[1])) || (0x80 != (0xc0 & s[2]))) {
- return (void *)s;
- }
-
- // ensure that our utf8 codepoint ended after 3 bytes
- if (0x80 == (0xc0 & s[3])) {
- return (void *)s;
- }
-
- // 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 & s[0])) && (0 == (0x20 & s[1]))) {
- return (void *)s;
- }
-
- // 3-byte utf8 code point (began with 0b1110xxxx)
- s += 3;
- } else if (0xc0 == (0xe0 & *s)) {
- // ensure the 1 following byte in this 2-byte
- // utf8 codepoint began with 0b10xxxxxx
- if (0x80 != (0xc0 & s[1])) {
- return (void *)s;
- }
-
- // ensure that our utf8 codepoint ended after 2 bytes
- if (0x80 == (0xc0 & s[2])) {
- return (void *)s;
- }
-
- // 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 & s[0])) {
- return (void *)s;
- }
-
- // 2-byte utf8 code point (began with 0b110xxxxx)
- s += 2;
- } else if (0x00 == (0x80 & *s)) {
- // 1-byte ascii (began with 0b0xxxxxxx)
- s += 1;
- } else {
- // we have an invalid 0b1xxxxxxx utf8 code point entry
- return (void *)s;
- }
- }
-
- return utf8_null;
- }
-
- void *utf8codepoint(const void *utf8_restrict str,
- utf8_int32_t *utf8_restrict out_codepoint) {
- const char *s = (const char *)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]);
- s += 4;
- } else if (0xe0 == (0xf0 & s[0])) {
- // 3 byte utf8 codepoint
- *out_codepoint =
- ((0x0f & s[0]) << 12) | ((0x3f & s[1]) << 6) | (0x3f & s[2]);
- s += 3;
- } else if (0xc0 == (0xe0 & s[0])) {
- // 2 byte utf8 codepoint
- *out_codepoint = ((0x1f & s[0]) << 6) | (0x3f & s[1]);
- s += 2;
- } else {
- // 1 byte utf8 codepoint otherwise
- *out_codepoint = s[0];
- s += 1;
- }
-
- return (void *)s;
- }
-
- size_t utf8codepointsize(utf8_int32_t chr) {
- 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;
- }
- }
-
- void *utf8catcodepoint(void *utf8_restrict str, utf8_int32_t chr, size_t n) {
- char *s = (char *)str;
-
- if (0 == ((utf8_int32_t)0xffffff80 & chr)) {
- // 1-byte/7-bit ascii
- // (0b0xxxxxxx)
- if (n < 1) {
- return utf8_null;
- }
- s[0] = (char)chr;
- s += 1;
- } else if (0 == ((utf8_int32_t)0xfffff800 & chr)) {
- // 2-byte/11-bit utf8 code point
- // (0b110xxxxx 0b10xxxxxx)
- if (n < 2) {
- return utf8_null;
- }
- s[0] = 0xc0 | (char)(chr >> 6);
- s[1] = 0x80 | (char)(chr & 0x3f);
- s += 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;
- }
- s[0] = 0xe0 | (char)(chr >> 12);
- s[1] = 0x80 | (char)((chr >> 6) & 0x3f);
- s[2] = 0x80 | (char)(chr & 0x3f);
- s += 3;
- } else { // if (0 == ((int)0xffe00000 & chr)) {
- // 4-byte/21-bit utf8 code point
- // (0b11110xxx 0b10xxxxxx 0b10xxxxxx 0b10xxxxxx)
- if (n < 4) {
- return utf8_null;
- }
- s[0] = 0xf0 | (char)(chr >> 18);
- s[1] = 0x80 | (char)((chr >> 12) & 0x3f);
- s[2] = 0x80 | (char)((chr >> 6) & 0x3f);
- s[3] = 0x80 | (char)(chr & 0x3f);
- s += 4;
- }
-
- return s;
- }
-
- int utf8islower(utf8_int32_t chr) { return chr != utf8uprcodepoint(chr); }
-
- int utf8isupper(utf8_int32_t chr) { return chr != utf8lwrcodepoint(chr); }
-
- void utf8lwr(void *utf8_restrict str) {
- void *p, *pn;
- utf8_int32_t cp;
-
- p = (char *)str;
- pn = utf8codepoint(p, &cp);
-
- while (cp != 0) {
- const utf8_int32_t lwr_cp = utf8lwrcodepoint(cp);
- const size_t size = utf8codepointsize(lwr_cp);
-
- if (lwr_cp != cp) {
- utf8catcodepoint(p, lwr_cp, size);
- }
-
- p = pn;
- pn = utf8codepoint(p, &cp);
- }
- }
-
- void utf8upr(void *utf8_restrict str) {
- void *p, *pn;
- utf8_int32_t cp;
-
- p = (char *)str;
- pn = utf8codepoint(p, &cp);
-
- while (cp != 0) {
- const utf8_int32_t lwr_cp = utf8uprcodepoint(cp);
- const size_t size = utf8codepointsize(lwr_cp);
-
- if (lwr_cp != cp) {
- utf8catcodepoint(p, lwr_cp, size);
- }
-
- p = pn;
- pn = utf8codepoint(p, &cp);
- }
- }
-
- utf8_int32_t utf8lwrcodepoint(utf8_int32_t cp) {
- if (((0x0041 <= cp) && (0x005a >= cp)) ||
- ((0x00c0 <= cp) && (0x00d6 >= cp)) ||
- ((0x00d8 <= cp) && (0x00de >= cp)) ||
- ((0x0391 <= cp) && (0x03a1 >= cp)) ||
- ((0x03a3 <= cp) && (0x03ab >= cp))) {
- cp += 32;
- } 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))) {
- 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 = 0x03d1; break;
- case 0x03cf: cp = 0x03d7; break;
- case 0x03f9: cp = 0x03f2; break;
- case 0x03f7: cp = 0x03f8; break;
- case 0x03fa: cp = 0x03fb; break;
- };
- }
-
- return cp;
- }
-
- utf8_int32_t utf8uprcodepoint(utf8_int32_t cp) {
- if (((0x0061 <= cp) && (0x007a >= cp)) ||
- ((0x00e0 <= cp) && (0x00f6 >= cp)) ||
- ((0x00f8 <= cp) && (0x00fe >= cp)) ||
- ((0x03b1 <= cp) && (0x03c1 >= cp)) ||
- ((0x03c3 <= cp) && (0x03cb >= cp))) {
- cp -= 32;
- } 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))) {
- 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 = 0x03f4; break;
- case 0x03d7: cp = 0x03cf; break;
- case 0x03f2: cp = 0x03f9; break;
- case 0x03f8: cp = 0x03f7; break;
- case 0x03fb: cp = 0x03fa; break;
- };
- }
-
- return cp;
- }
-
-#undef utf8_restrict
-#undef utf8_null
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#if defined(__clang__)
-#pragma clang diagnostic pop
-#endif
-
-#endif // SHEREDOM_UTF8_H_INCLUDED
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 18:52:28 +0000