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41 lines
1.8 KiB
C
41 lines
1.8 KiB
C
/******************************************************************************
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* *
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* s t r s t r *
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* *
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* Find the first occurrence of a string in another string. *
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* *
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* Format: *
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* return = strstr(Source,What); *
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* *
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* Parameters: *
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* *
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* Returns: *
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* *
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* Scope: PUBLIC *
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* *
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******************************************************************************/
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char *strstr(Source, What)
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register const char *Source;
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register const char *What;
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{
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register char WhatChar;
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register char SourceChar;
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register long Length;
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if ((WhatChar = *What++) != 0) {
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Length = strlen(What);
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do {
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do {
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if ((SourceChar = *Source++) == 0) {
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return (0);
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}
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} while (SourceChar != WhatChar);
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} while (strncmp(Source, What, Length) != 0);
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Source--;
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}
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return ((char *)Source);
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}/*strstr*/
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