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scan_utf8(3) Library Functions Manual scan_utf8(3) NAME scan_utf8 - decode an unsigned integer from UTF-8 encoding SYNTAX #include <libowfat/scan.h> size_t scan_utf8(const char *src,size_t len,uint32_t *dest); size_t scan_utf8_sem(const char *src,size_t len,uint32_t *dest); DESCRIPTION scan_utf8 decodes an unsigned integer in UTF-8 encoding from a memory area holding binary data. It writes the decode value in dest and returns the number of bytes it read from src. scan_utf8 never reads more than len bytes from src. If the sequence is longer than that, or the memory area contains an invalid sequence, scan_utf8 returns 0 and does not touch dest. The length of the longest valid UTF-8 sequence is 6. scan_utf8 will reject syntactically invalid encodings, but not semantically invalid ones. scan_utf8_sem will additionally reject surrogates. NOTE fmt_utf8 and scan_utf8 implement the encoding from UTF-8, but are meant to be able to store integers, not just Unicode code points. Values above 0x10ffff are not valid UTF-8. If you are using this function to parse UTF-8, you need to reject them (see RFC 3629). SEE ALSO fmt_utf8(3), scan_utf8_sem(3) scan_utf8(3)
NAME | SYNTAX | DESCRIPTION | NOTE | SEE ALSO
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