зеркало из https://github.com/github/ruby.git
30 строки
1.3 KiB
C
30 строки
1.3 KiB
C
#ifndef YP_STRPBRK_H
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#define YP_STRPBRK_H
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#include "yarp/defines.h"
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#include "yarp/parser.h"
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#include <stddef.h>
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#include <string.h>
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// Here we have rolled our own version of strpbrk. The standard library strpbrk
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// has undefined behavior when the source string is not null-terminated. We want
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// to support strings that are not null-terminated because yp_parse does not
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// have the contract that the string is null-terminated. (This is desirable
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// because it means the extension can call yp_parse with the result of a call to
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// mmap).
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//
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// The standard library strpbrk also does not support passing a maximum length
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// to search. We want to support this for the reason mentioned above, but we
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// also don't want it to stop on null bytes. Ruby actually allows null bytes
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// within strings, comments, regular expressions, etc. So we need to be able to
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// skip past them.
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//
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// Finally, we want to support encodings wherein the charset could contain
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// characters that are trailing bytes of multi-byte characters. For example, in
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// Shift-JIS, the backslash character can be a trailing byte. In that case we
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// need to take a slower path and iterate one multi-byte character at a time.
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const char * yp_strpbrk(yp_parser_t *parser, const char *source, const char *charset, ptrdiff_t length);
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#endif
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