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/***
*wcstok.c - tokenize a wide-character string with given delimiters
*
* Copyright (c) 1989-1993, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines wcstok() - breaks wide-character string into series of token
* via repeated calls.
*
*Revision History:
* 09-09-91 ETC Created from strtok.c.
* 08-17-92 KRS Activate multithread support.
* 02-17-93 GJF Changed for new _getptd().
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
#ifdef MTHREAD
#include <os2dll.h>
#endif
/***
*wchar_t *wcstok(string, control) - tokenize string with delimiter in control
* (wide-characters)
*
*Purpose:
* wcstok considers the string to consist of a sequence of zero or more
* text tokens separated by spans of one or more control chars. the first
* call, with string specified, returns a pointer to the first wchar_t of
* the first token, and will write a null wchar_t into string immediately
* following the returned token. subsequent calls with zero for the first
* argument (string) will work thru the string until no tokens remain. the
* control string may be different from call to call. when no tokens remain
* in string a NULL pointer is returned. remember the control chars with a
* bit map, one bit per wchar_t. the null wchar_t is always a control char
* (wide-characters).
*
*Entry:
* wchar_t *string - wchar_t string to tokenize, or NULL to get next token
* wchar_t *control - wchar_t string of characters to use as delimiters
*
*Exit:
* returns pointer to first token in string, or if string
* was NULL, to next token
* returns NULL when no more tokens remain.
*
*Uses:
*
*Exceptions:
*
*******************************************************************************/
wchar_t * _CRTAPI1 wcstok (
wchar_t * string,
const wchar_t * control
)
{
wchar_t *token;
const wchar_t *ctl;
#ifdef MTHREAD
#ifdef _CRUISER_
struct _tiddata * tdata;
tdata = _gettidtab(); /* init tid's data address */
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
_ptiddata ptd = _getptd();
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
#else
static wchar_t *nextoken;
#endif
/* If string==NULL, continue with previous string */
if (!string)
#ifdef MTHREAD
#ifdef _CRUISER_
string = tdata->_wtoken;
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
string = ptd->_wtoken;
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
#else
string = nextoken;
#endif
/* Find beginning of token (skip over leading delimiters). Note that
* there is no token iff this loop sets string to point to the terminal
* null (*string == '\0') */
while (*string) {
for (ctl=control; *ctl && *ctl != *string; ctl++)
;
if (!*ctl) break;
string++;
}
token = string;
/* Find the end of the token. If it is not the end of the string,
* put a null there. */
for ( ; *string ; string++ ) {
for (ctl=control; *ctl && *ctl != *string; ctl++)
;
if (*ctl) {
*string++ = '\0';
break;
}
}
/* Update nextoken (or the corresponding field in the per-thread data
* structure */
#ifdef MTHREAD
#ifdef _CRUISER_
tdata->_wtoken = string;
#else /* _CRUISER_ */
#ifdef _WIN32_
ptd->_wtoken = string;
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
#else
nextoken = string;
#endif
/* Determine if a token has been found. */
if ( token == string )
return NULL;
else
return token;
}
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