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READ-LIN.H
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C/C++ Source or Header
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1993-07-30
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/* This may look like C code, but it is really -*- C++ -*- */
/* Reads arbitrarily long string from input file, returning it as a dynamic buffer.
Copyright (C) 1989 Free Software Foundation, Inc.
written by Douglas C. Schmidt (schmidt@ics.uci.edu)
This file is part of GNU GPERF.
GNU GPERF is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
GNU GPERF is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU GPERF; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Returns a pointer to an arbitrary length string. Returns NULL on error or EOF
The storage for the string is dynamically allocated by new. */
#pragma once
#include <stdio.h>
#include "trace.h"
class Read_Line
{
private:
char *readln_aux (int chunks);
FILE *fp; /* FILE pointer to the input stream. */
const int CHUNK_SIZE; /* Size of each chunk. */
public:
Read_Line (FILE *stream = stdin, int size = BUFSIZ):
fp (stream), CHUNK_SIZE (size) {;}
char *get_line (void);
};
#ifdef __OPTIMIZE__
inline char *
Read_Line::get_line (void)
{
T (Trace t ("Read_Line::get_line");)
int c;
if ((c = getc (fp)) == '#')
{
while (getc (fp) != '\n')
;
return get_line ();
}
else
{
ungetc (c, stdin);
return readln_aux (0);
}
}
#endif