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109 lines
2.1 KiB
C
109 lines
2.1 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: ntoskrnl/rtl/strtok.c
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* PURPOSE: Unicode and thread safe implementation of strtok
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*
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* PROGRAMMERS: David Welch (welch@mcmail.com)
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*/
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/* INCLUDES *****************************************************************/
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#include <ntoskrnl.h>
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#include <internal/debug.h>
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/* FUNCTIONS *****************************************************************/
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char* __cdecl 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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static char *last;
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if (s == NULL && (s = last) == 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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last = 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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last = 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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PWSTR RtlStrtok(PUNICODE_STRING _string, PWSTR _sep,
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PWSTR* temp)
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/*
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* FUNCTION: Splits a string into tokens
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* ARGUMENTS:
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* string = string to operate on
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* if NULL then continue with previous string
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* sep = Token deliminators
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* temp = Tempory storage provided by the caller
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* ARGUMENTS: Returns the beginning of the next token
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*/
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{
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PWSTR string;
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PWSTR sep;
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PWSTR start;
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if (_string!=NULL)
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{
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string = _string->Buffer;
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}
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else
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{
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string = *temp;
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}
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start = string;
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while ((*string)!=0)
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{
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sep = _sep;
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while ((*sep)!=0)
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{
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if ((*string)==(*sep))
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{
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*string=0;
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*temp=string+1;
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return(start);
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}
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sep++;
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}
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string++;
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}
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*temp=NULL;
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return(start);
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}
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