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16 lines
552 B
16 lines
552 B
#include "byte.h" |
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/* byte_chr returns the smallest integer i between 0 and len-1 |
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* inclusive such that one[i] equals needle, or len if not found. */ |
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unsigned long byte_chr(const void* haystack, unsigned long len, char needle) { |
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register char c=needle; |
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register const char* s=haystack; |
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register const char* t=s+len; |
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for (;;) { |
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if (s==t) break; if (*s==c) break; ++s; |
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if (s==t) break; if (*s==c) break; ++s; |
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if (s==t) break; if (*s==c) break; ++s; |
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if (s==t) break; if (*s==c) break; ++s; |
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} |
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return s-(const char*)haystack; |
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}
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