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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1627 | serge | 1 | /* strrchr() Author: Kees J. Bot */ |
| 2 | /* 2 Jan 1994 */ |
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| 3 | |||
| 4 | /* char *strrchr(const char *s, int c) */ |
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| 5 | /* Look for the last occurrence a character in a string. */ |
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| 6 | /* */ |
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| 7 | #include "asm.h" |
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| 8 | |||
| 9 | ENTRY(strrchr) |
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| 10 | push %ebp |
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| 11 | movl %esp, %ebp |
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| 12 | push %edi |
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| 13 | movl 8(%ebp), %edi /* edi = string */ |
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| 14 | movl $-1, %ecx |
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| 15 | xorb %al, %al |
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| 16 | cld |
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| 17 | |||
| 18 | repne scasb /* Look for the end of the string */ |
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| 19 | notl %ecx /* -1 - ecx = Length of the string + null */ |
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| 20 | decl %edi /* Put edi back on the zero byte */ |
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| 21 | movb 12(%ebp), %al /* The character to look for */ |
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| 22 | std /* Downwards search */ |
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| 23 | |||
| 24 | repne scasb |
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| 25 | cld /* Direction bit back to default */ |
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| 26 | jne failure |
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| 27 | leal 1(%edi), %eax /* Found it */ |
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| 28 | pop %edi |
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| 29 | pop %ebp |
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| 30 | ret |
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| 31 | failure: |
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| 32 | xorl %eax, %eax /* Not there */ |
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| 33 | pop %edi |
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| 34 | pop %ebp |
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| 35 | ret |