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51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
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/* OPEN.C - Routine for opening file that might be stdin/stdout. */
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/* Copyright (c) 1995-2012 by Radford M. Neal.
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*
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* Permission is granted for anyone to copy, use, modify, and distribute
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* these programs and accompanying documents for any purpose, provided
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* this copyright notice is retained and prominently displayed, and note
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* is made of any changes made to these programs. These programs and
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* documents are distributed without any warranty, express or implied.
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* As the programs were written for research purposes only, they have not
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* been tested to the degree that would be advisable in any important
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* application. All use of these programs is entirely at the user's own
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* risk.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "open.h"
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/* OPEN A FILE THAT MIGHT BE STANDARD INPUT OR OUTPUT. If the file name
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given is "-", this procedure just returns stdin or stdout, depending on
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whether the mode is for reading or writing. Otherwise, fopen is called.
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*/
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FILE *open_file_std
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( char *fname, /* Name of file to open, or "-" for stdin/stdout */
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char *mode /* Mode for opening: eg, "r" or "w" */
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)
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{
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if (strcmp(fname,"-")==0)
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{ switch (mode[0])
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{ case 'r':
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{ return stdin;
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}
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case 'w':
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{ return stdout;
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}
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default:
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{ fprintf(stderr,"Bad mode passed to open_file_std: %s\n",mode);
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exit(1);
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}
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}
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}
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else
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{ return fopen(fname,mode);
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}
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}
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