95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
|
/***
|
||
|
|
*getw.c - read a binary word from a stream
|
||
|
|
*
|
||
|
|
* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* defines _getw() - gets a binary integer from a stream
|
||
|
|
*
|
||
|
|
*Revision History:
|
||
|
|
* 09-02-83 RN initial version
|
||
|
|
* 11-09-87 JCR Multi-thread support
|
||
|
|
* 12-11-87 JCR Added "_LOAD_DS" to declaration
|
||
|
|
* 01-13-88 JCR Removed unnecessary calls to mthread fileno/feof/ferror
|
||
|
|
* 05-27-88 PHG Merged DLL and normal versions
|
||
|
|
* Fixed bug if EOF occurs in middle of word being read
|
||
|
|
* 06-15-88 JCR Near reference to _iob[] entries; improve REG variables
|
||
|
|
* 08-24-88 GJF Don't use FP_OFF() macro for the 386
|
||
|
|
* 08-18-89 GJF Clean up, now specific to OS/2 2.0 (i.e., 386 flat
|
||
|
|
* model). Also fixed copyright and indents.
|
||
|
|
* 02-15-90 GJF Fixed copyright
|
||
|
|
* 03-19-90 GJF Made calling type _CALLTYPE1, added #include
|
||
|
|
* <cruntime.h> and removed #include <register.h>.
|
||
|
|
* 07-23-90 SBM Replaced <assertm.h> by <assert.h>
|
||
|
|
* 08-13-90 SBM Compiles cleanly with -W3
|
||
|
|
* 10-02-90 GJF New-style function declarator.
|
||
|
|
* 01-21-91 GJF ANSI naming.
|
||
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
||
|
|
* 09-06-94 CFW Replace MTHREAD with _MT.
|
||
|
|
* 02-06-94 CFW assert -> _ASSERTE.
|
||
|
|
* 03-07-95 GJF _[un]lock_str macros now take FILE * arg.
|
||
|
|
* 03-02-98 GJF Exception-safe locking.
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#include <cruntime.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <dbgint.h>
|
||
|
|
#include <file2.h>
|
||
|
|
#include <internal.h>
|
||
|
|
#include <mtdll.h>
|
||
|
|
|
||
|
|
/***
|
||
|
|
*int _getw(stream) - read an int from a stream
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* get n bytes (n=sizeof(int)); OR them together in proper order; high
|
||
|
|
* byte first. check for EOF between getc's.
|
||
|
|
* this routine should be machine independent.
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
* FILE *stream - stream to read integer from
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
* returns the int read from the stream
|
||
|
|
* returns EOF if fails (but this is a legit int value, so
|
||
|
|
* should test feof() or ferror().
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
int __cdecl _getw (
|
||
|
|
FILE *str
|
||
|
|
)
|
||
|
|
{
|
||
|
|
REG1 FILE *stream;
|
||
|
|
REG2 int bytecount = sizeof(int);
|
||
|
|
int word;
|
||
|
|
char *byteptr = (char *)&word;
|
||
|
|
int retval;
|
||
|
|
|
||
|
|
_ASSERTE(str != NULL);
|
||
|
|
|
||
|
|
/* Init stream pointer */
|
||
|
|
stream = str;
|
||
|
|
|
||
|
|
#ifdef _MT
|
||
|
|
_lock_str(stream);
|
||
|
|
__try {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
while (bytecount--)
|
||
|
|
*byteptr++ = (char)_getc_lk(stream);
|
||
|
|
retval = ((feof(stream) || ferror(stream)) ? EOF : word);
|
||
|
|
|
||
|
|
#ifdef _MT
|
||
|
|
}
|
||
|
|
__finally {
|
||
|
|
_unlock_str(stream);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return(retval);
|
||
|
|
}
|