Revision 18474,
905 bytes
checked in by ghudson, 21 years ago
(diff) |
This commit was generated by cvs2svn to compensate for changes in r18473,
which included commits to RCS files with non-trunk default branches.
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1 | /* |
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2 | |
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3 | @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n}) |
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4 | |
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5 | This function searches memory starting at @code{*@var{s}} for the |
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6 | character @var{c}. The search only ends with the first occurrence of |
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7 | @var{c}, or after @var{length} characters; in particular, a null |
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8 | character does not terminate the search. If the character @var{c} is |
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9 | found within @var{length} characters of @code{*@var{s}}, a pointer |
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10 | to the character is returned. If @var{c} is not found, then @code{NULL} is |
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11 | returned. |
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12 | |
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13 | @end deftypefn |
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14 | |
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15 | */ |
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16 | |
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17 | #include <ansidecl.h> |
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18 | #ifdef __STDC__ |
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19 | #include <stddef.h> |
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20 | #else |
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21 | #define size_t unsigned long |
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22 | #endif |
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23 | |
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24 | PTR |
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25 | memchr (src_void, c, length) |
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26 | register const PTR src_void; |
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27 | int c; |
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28 | size_t length; |
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29 | { |
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30 | const unsigned char *src = (const unsigned char *)src_void; |
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31 | |
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32 | while (length-- > 0) |
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33 | { |
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34 | if (*src == c) |
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35 | return (PTR)src; |
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36 | src++; |
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37 | } |
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38 | return NULL; |
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39 | } |
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