blob: 9c1093fb61af8fc5a019c8ffd7fbdba5ce02e57b (
plain) (
tree)
|
|
/***
*mbstok.c - Break string into tokens (MBCS)
*
* Copyright (c) 1985-1993, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Break string into tokens (MBCS)
*
*Revision History:
* 11-19-92 KRS Ported from 16-bit sources.
* 12-04-92 KRS Added MTHREAD support.
* 02-17-93 GJF Changed for new _getptd().
* 07-14-93 KRS Fix: all references should be to _mtoken, not _token.
*
*******************************************************************************/
#ifdef _MBCS
#include <cruntime.h>
#include <mbdata.h>
#include <mbctype.h>
#include <mbstring.h>
#include <stddef.h>
#ifdef MTHREAD
#include <os2dll.h>
#endif
#define _MBSSPNP(p,s) _mbsspnp(p,s)
#define _MBSPBRK(q,s) _mbspbrk(q,s);
/***
* _mbstok - Break string into tokens (MBCS)
*
*Purpose:
* strtok 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 char of the
* first token, and will write a null char 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 ascii char. the null char is always a control char.
*
* MBCS chars supported correctly.
*
*Entry:
* char *string = string to break into tokens.
* char *sepset = set of characters to use as seperators
*
*Exit:
* returns pointer to token, or NULL if no more tokens
*
*Exceptions:
*
*******************************************************************************/
unsigned char * _CRTAPI1 _mbstok( string, sepset )
unsigned char * string;
const unsigned char * sepset;
{
unsigned char *nextsep;
#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_ */
unsigned char *nextoken;
#else /* MTHREAD */
static unsigned char *nextoken;
#endif /* MTHREAD */
/* init start of scan */
if (string)
nextoken = string;
else
/* If string==NULL, continue with previous string */
{
#ifdef MTHREAD
#ifdef _CRUISER_
nextoken = tdata->_mtoken;
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
nextoken = ptd->_mtoken;
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
#endif /* MTHREAD */
if (!nextoken)
return NULL;
}
/* skip over lead seperators */
if ((string = _MBSSPNP(nextoken, sepset)) == NULL)
return(NULL);
/* test for end of string */
if ( (*string == '\0') ||
( (_ISLEADBYTE(*string)) && (string[1] == '\0') )
)
return(NULL);
/* find next seperator */
nextsep = _MBSPBRK(string, sepset);
if ((nextsep == NULL) || (*nextsep == '\0'))
nextoken = NULL;
else {
if (_ISLEADBYTE(*nextsep))
*nextsep++ = '\0';
*nextsep = '\0';
nextoken = ++nextsep;
}
#ifdef MTHREAD
/* Update the corresponding field in the per-thread data * structure */
#ifdef _CRUISER_
tdata->_mtoken = nextoken;
#else /* _CRUISER_ */
#ifdef _WIN32_
ptd->_mtoken = nextoken;
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
#endif /* MTHREAD */
return(string);
}
#endif /* _MBCS */
|
