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A common complain with libSQL is how to run extensions. The main mechanism, with a .so, has a lot of issues around how those .so are distributed. The most common extensions are the ones in the sqlean package. We can improve this experience by bundling them in our sqlite build. Not all SQLean extensions are kosher: some of them, like fileio, use the vfs. Others, are deemed too complex. The extensions included here are a subset that we deem important enough, and low risk enough, to just be a part of the main bundle.
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
// Copyright (c) 2024 Anton Zhiyanov, MIT License
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// https://github.com/nalgeon/sqlean
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// UTF-8 string handling.
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#ifndef UTF8_H
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#define UTF8_H
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#include <stdint.h>
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// decode next utf8 codepoint.
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// See https://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
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typedef struct {
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uint32_t state, codep;
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} utf8_decode_t;
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// utf8_decode decodes a byte as part of a utf8 codepoint.
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uint32_t utf8_decode(utf8_decode_t* d, const uint32_t byte);
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// utf8_encode encodes the utf8 codepoint c to s
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// and returns the number of bytes written.
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int utf8_encode(char* out, uint32_t c);
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// utf8_len returns the number of utf8 codepoints in s.
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size_t utf8_len(const char* s, size_t n);
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// utf8_at returns a pointer to the utf8 codepoint at index in s.
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const char* utf8_at(const char* s, size_t n, size_t index);
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// utf8_pos returns the byte position of the utf8 codepoint at index in s.
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size_t utf8_pos(const char* s, size_t n, size_t index);
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// utf8_peek returns the utf8 codepoint at the start of s.
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uint32_t utf8_peek(const char* s);
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// utf8_peek_at returns the utf8 codepoint at the index pos from s.
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uint32_t utf8_peek_at(const char* s, size_t n, size_t pos);
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// utf8_icmp compares the utf8 strings s1 and s2 case-insensitively.
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int utf8_icmp(const char* s1, size_t n1, const char* s2, size_t n2);
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// utf8_valid returns true if s is a valid utf8 string.
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bool utf8_valid(const char* s, size_t n);
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// utf8_tolower converts the utf8 string s to lowercase.
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bool utf8_tolower(char* s, size_t n);
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// utf8_toupper converts the utf8 string s to uppercase.
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bool utf8_toupper(char* s, size_t n);
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// utf8_totitle converts the utf8 string s to title-case.
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bool utf8_totitle(char* s, size_t n);
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// utf8_casefold converts the utf8 string s to folded-case.
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bool utf8_casefold(char* s, size_t n);
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#endif // UTF8_H
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