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Moved utf8.h/cpp to namespace json::

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Андреев Григорий 2024-08-21 09:50:46 +03:00
parent 1c2e479012
commit d4c48ea269
2 changed files with 86 additions and 82 deletions
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154
src/library/jsonincpp/utf8.cpp
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@ -1,82 +1,84 @@
#include "utf8.h" #include "utf8.h"
#include <assert.h> #include <assert.h>
int _utf8_retrieve_size(uint8_t firstByte) { namespace json {
if (!(firstByte & 0b10000000)) int utf8_retrieve_size(uint8_t firstByte) {
return 1; if (!(firstByte & 0b10000000))
uint8_t a = 0b11000000; return 1;
uint8_t b = 0b00100000; uint8_t a = 0b11000000;
for (int i = 2; i <= 4; i++){ uint8_t b = 0b00100000;
if ((firstByte & (a | b)) == a) for (int i = 2; i <= 4; i++){
return i; if ((firstByte & (a | b)) == a)
a |= b; return i;
b >>= 1; a |= b;
} b >>= 1;
return -1; }
}
int32_t _utf8_retrieve_character(int sz, size_t pos, const char *string) {
if (sz == 1)
return (int32_t)string[pos];
uint32_t v = ((uint8_t)string[pos]) & (0b01111111 >> sz);
pos++;
for (int i = 1; i < sz; i++){
uint32_t th = (uint8_t)string[pos];
if ((th & 0b11000000) != 0b10000000)
return -1;
v <<= 6;
v |= (th & 0b00111111);
pos++;
}
assert(v <= INT32_MAX);
return static_cast<int32_t>(v);
}
void utf8_string_iterat(int32_t &cp, size_t &adj, size_t pos, const char *string, size_t string_size) {
if (pos >= string_size) {cp = -1; return;}
adj = _utf8_retrieve_size((uint8_t)string[pos]);
if (adj < 0 || pos + adj > string_size) {cp = -1; return;}
if ((cp = _utf8_retrieve_character(adj, pos, string)) < 0) {cp = -1; return;}
}
bool isUtf8String(const std::string &str) {
size_t N = str.size();
size_t cpos = 0;
while (cpos < N) {
int32_t codepoint;
size_t adj;
utf8_string_iterat(codepoint, adj, cpos, str.data(), N);
if (codepoint < 0)
return false;
cpos += adj;
}
return true;
}
int codepoint_to_utf8(uint32_t cp, std::string &out) {
size_t N = out.size();
auto make_compl = [cp](int imp) -> char {
return (char)(((cp >> imp) & 0x3f) | 0x80);
};
if (cp > 0x10FFFF)
return -1; return -1;
if (cp <= 0x7F) {
out += (char)cp;
} else if (cp <= 0x7ff) {
out.resize(N + 2);
out[N] = (char)((cp >> 6) | 0xc0);
out[N + 1] = make_compl(0);
} else if (cp <= 0xffff) {
out.resize(N + 3);
out[N] = (char)((cp >> 12) | 0xe0);
out[N + 1] = make_compl(6);
out[N + 2] = make_compl(0);
} else {
out.resize(N + 4);
out[N] = (char)((cp >> 18) | 0xf0);
out[N + 1] = make_compl(12);
out[N + 2] = make_compl(6);
out[N + 3] = make_compl(0);
} }
return 0;
int32_t utf8_retrieve_character(int sz, size_t pos, const char *string) {
if (sz == 1)
return (int32_t)string[pos];
uint32_t v = ((uint8_t)string[pos]) & (0b01111111 >> sz);
pos++;
for (int i = 1; i < sz; i++){
uint32_t th = (uint8_t)string[pos];
if ((th & 0b11000000) != 0b10000000)
return -1;
v <<= 6;
v |= (th & 0b00111111);
pos++;
}
assert(v <= INT32_MAX);
return static_cast<int32_t>(v);
}
void utf8_string_iterat(int32_t &cp, size_t &adj, size_t pos, const char *string, size_t string_size) {
if (pos >= string_size) {cp = -1; return;}
adj = utf8_retrieve_size((uint8_t)string[pos]);
if (adj < 0 || pos + adj > string_size) {cp = -1; return;}
if ((cp = utf8_retrieve_character(adj, pos, string)) < 0) {cp = -1; return;}
}
bool isUtf8String(const std::string &str) {
size_t N = str.size();
size_t cpos = 0;
while (cpos < N) {
int32_t codepoint;
size_t adj;
utf8_string_iterat(codepoint, adj, cpos, str.data(), N);
if (codepoint < 0)
return false;
cpos += adj;
}
return true;
}
int codepoint_to_utf8(uint32_t cp, std::string &out) {
size_t N = out.size();
auto make_compl = [cp](int imp) -> char {
return (char)(((cp >> imp) & 0x3f) | 0x80);
};
if (cp > 0x10FFFF)
return -1;
if (cp <= 0x7F) {
out += (char)cp;
} else if (cp <= 0x7ff) {
out.resize(N + 2);
out[N] = (char)((cp >> 6) | 0xc0);
out[N + 1] = make_compl(0);
} else if (cp <= 0xffff) {
out.resize(N + 3);
out[N] = (char)((cp >> 12) | 0xe0);
out[N + 1] = make_compl(6);
out[N + 2] = make_compl(0);
} else {
out.resize(N + 4);
out[N] = (char)((cp >> 18) | 0xf0);
out[N + 1] = make_compl(12);
out[N + 2] = make_compl(6);
out[N + 3] = make_compl(0);
}
return 0;
}
} }

14
src/library/jsonincpp/utf8.h
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@ -4,15 +4,17 @@
#include <stdint.h> #include <stdint.h>
#include <string> #include <string>
int _utf8_retrieve_size(uint8_t firstByte); namespace json {
int utf8_retrieve_size(uint8_t firstByte);
int32_t _utf8_retrieve_character(int sz, size_t pos, const char *string); int32_t utf8_retrieve_character(int sz, size_t pos, const char *string);
void utf8_string_iterat(int32_t &cp, size_t &adj, size_t pos, const char *string, size_t string_size); void utf8_string_iterat(int32_t &cp, size_t &adj, size_t pos, const char *string, size_t string_size);
bool isUtf8String(const std::string& str); bool isUtf8String(const std::string& str);
/* Returns -1 if cp is not in 0-0x10FFFF range */ /* Returns -1 if cp is not in 0-0x10FFFF range */
int codepoint_to_utf8(uint32_t cp, std::string& out); int codepoint_to_utf8(uint32_t cp, std::string& out);
}
#endif #endif