www.pudn.com > GsmToUart.rar > FGETS.C

/*** 
*fgets.c - get string from a file 
* 
*       Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved. 
* 
*Purpose: 
*       defines fgets() - read a string from a file 
* 
*******************************************************************************/ 
 
#include  
#include  
#include  
#include  
#include  
#include  
#include  
 
/*** 
*char *fgets(string, count, stream) - input string from a stream 
* 
*Purpose: 
*       get a string, up to count-1 chars or '\n', whichever comes first, 
*       append '\0' and put the whole thing into string. the '\n' IS included 
*       in the string. if count<=1 no input is requested. if EOF is found 
*       immediately, return NULL. if EOF found after chars read, let EOF 
*       finish the string as '\n' would. 
* 
*Entry: 
*       char *string - pointer to place to store string 
*       int count - max characters to place at string (include \0) 
*       FILE *stream - stream to read from 
* 
*Exit: 
*       returns string with text read from file in it. 
*       if count <= 0 return NULL 
*       if count == 1 put null string in string 
*       returns NULL if error or end-of-file found immediately 
* 
*Exceptions: 
* 
*******************************************************************************/ 
 
#ifdef _UNICODE 
wchar_t * __cdecl fgetws ( 
#else  /* _UNICODE */ 
char * __cdecl fgets ( 
#endif  /* _UNICODE */ 
        _TSCHAR *string, 
        int count, 
        FILE *str 
        ) 
{ 
        REG1 FILE *stream; 
        REG2 _TSCHAR *pointer = string; 
        _TSCHAR *retval = string; 
        int ch; 
 
        _ASSERTE(string != NULL); 
        _ASSERTE(str != NULL); 
 
        if (count <= 0) 
                return(NULL); 
 
        /* Init stream pointer */ 
        stream = str; 
 
        _lock_str(stream); 
 
        while (--count) 
        { 
#ifdef _UNICODE 
                if ((ch = _getwc_lk(stream)) == WEOF) 
#else  /* _UNICODE */ 
                if ((ch = _getc_lk(stream)) == EOF) 
#endif  /* _UNICODE */ 
                { 
                        if (pointer == string) { 
                                retval=NULL; 
                                goto done; 
                        } 
 
                        break; 
                } 
 
                if ((*pointer++ = (_TSCHAR)ch) == _T('\n')) 
                        break; 
        } 
 
        *pointer = _T('\0'); 
 
/* Common return */ 
done: 
        _unlock_str(stream); 
        return(retval); 
}