82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
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/***
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*swscanf.c - read formatted data from wide-character string
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*
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* Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines _swscanf() - reads formatted data from wide-character string
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*
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*Revision History:
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* 11-21-91 ETC Created from sscanf.c
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# 05-16-92 KRS Revised for new ISO spec. format is wchar_t * now.
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* 02-18-93 SRW Make FILE a local and remove lock usage.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <assert.h>
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#include <stdarg.h>
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#include <string.h>
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#include <internal.h>
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#include <os2dll.h>
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/***
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*int swscanf(string, format, ...) - read formatted data from wide-char string
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*
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*Purpose:
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* Same as sscanf (described below) from reads from a wide-char string.
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*
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* Reads formatted data from string into arguments. _winput does the real
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* work here. Sets up a FILE so file i/o operations can be used, makes
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* string look like a huge buffer to it, but _filbuf will refuse to refill
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* it if it is exhausted.
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*
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* Allocate the 'fake' _iob[] entryit statically instead of on
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* the stack so that other routines can assume that _iob[] entries are in
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* are in DGROUP and, thus, are near.
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*
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* Multi-thread: (1) Since there is no stream, this routine must never try
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* to get the stream lock (i.e., there is no stream lock either). (2)
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* Also, since there is only one staticly allocated 'fake' iob, we must
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* lock/unlock to prevent collisions.
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*
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*Entry:
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* wchar_t *string - wide-character string to read data from
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* wchar_t *format - format string
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* followed by list of pointers to storage for the data read. The number
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* and type are controlled by the format string.
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*
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*Exit:
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* returns number of fields read and assigned
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*
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*Exceptions:
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*
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*******************************************************************************/
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int _CALLTYPE2 swscanf (
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REG2 const wchar_t *string,
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const wchar_t *format,
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...
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)
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{
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va_list arglist;
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FILE str;
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REG1 FILE *infile = &str;
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REG2 int retval;
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va_start(arglist, format);
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assert(string != NULL);
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assert(format != NULL);
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infile->_flag = _IOREAD|_IOSTRG|_IOMYBUF;
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infile->_ptr = infile->_base = (char *) string;
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infile->_cnt = wcslen(string)*sizeof(wchar_t);
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retval = (_winput(infile,format,arglist));
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return(retval);
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}
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