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51 lines
1 KiB
C
51 lines
1 KiB
C
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
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#include <msvcrt/string.h>
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#include <msvcrt/internal/tls.h>
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char *strtok(char *s, const char *delim)
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{
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const char *spanp;
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int c, sc;
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char *tok;
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PTHREADDATA ThreadData = GetThreadData();
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if (s == NULL && (s = ThreadData->lasttoken) == NULL)
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return (NULL);
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/*
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* Skip (span) leading delimiters (s += strspn(s, delim), sort of).
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*/
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cont:
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c = *s++;
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for (spanp = delim; (sc = *spanp++) != 0;) {
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if (c == sc)
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goto cont;
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}
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if (c == 0) { /* no non-delimiter characters */
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ThreadData->lasttoken = NULL;
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return (NULL);
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}
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tok = s - 1;
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/*
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* Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
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* Note that delim must have one NUL; we stop if we see that, too.
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*/
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for (;;) {
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c = *s++;
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spanp = delim;
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do {
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if ((sc = *spanp++) == c) {
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if (c == 0)
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s = NULL;
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else
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s[-1] = 0;
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ThreadData->lasttoken = s;
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return (tok);
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}
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} while (sc != 0);
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}
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/* NOTREACHED */
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}
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