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Added 16 bit string-encoding (#5540)

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CEisenhofer 2021-09-09 11:35:16 +02:00 • committed by GitHub
parent e70f501932
commit 47fdd6c060
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7 changed files with 74 additions and 35 deletions
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32
src/util/zstring.h
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@ -21,17 +21,47 @@ Author:
#include "util/buffer.h"
#include "util/rational.h"
enum string_encoding {
ascii, // exactly 8 bits
unicode,
bmp // basic multilingual plane; exactly 16 bits
};
class zstring {
private:
buffer<uint32_t> m_buffer;
bool well_formed() const;
bool uses_unicode() const;
bool is_escape_char(char const *& s, unsigned& result);
public:
static unsigned unicode_max_char() { return 196607; }
static unsigned unicode_num_bits() { return 18; }
static unsigned bmp_max_char() { return 65535; }
static unsigned bmp_num_bits() { return 16; }
static unsigned ascii_max_char() { return 255; }
static unsigned ascii_num_bits() { return 8; }
static unsigned max_char() {
switch (get_encoding()) {
case unicode:
return unicode_max_char();
case bmp:
return bmp_max_char();
case ascii:
return ascii_max_char();
}
return unicode_max_char();
}
static unsigned num_bits() {
switch (get_encoding()) {
case unicode:
return unicode_num_bits();
case bmp:
return bmp_num_bits();
case ascii:
return ascii_num_bits();
}
return unicode_num_bits();
}
static string_encoding get_encoding();
zstring() = default;
zstring(char const* s);
zstring(const std::string &str) : zstring(str.c_str()) {}