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rgentlem |
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/*
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maechler |
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* R : A Computer Language for Statistical Data Analysis
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rgentlem |
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* Copyright (C) 1997 Robert Gentleman and Ross Ihaka
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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ripley |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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rgentlem |
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*/
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/*
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* I/O Support for Consoles and Character Vectors
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*
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* This code provides analogues for the stdio routines "fgetc" and
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* "ungetc" for "consoles" and character vectors. These routines
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* are used for parsing input from the console window and character
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* vectors.
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*/
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#include <stdio.h>
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#include "Defn.h"
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#define IOBSIZE 4096
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typedef struct BufferListItem {
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pd |
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unsigned char buf[IOBSIZE];
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rgentlem |
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struct BufferListItem *next;
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} BufferListItem;
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typedef struct IoBuffer {
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BufferListItem *start_buf; /* First buffer item */
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BufferListItem *write_buf; /* Write pointer location */
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pd |
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unsigned char *write_ptr; /* Write pointer location */
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rgentlem |
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int write_offset; /* Write pointer location */
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BufferListItem *read_buf; /* Read pointer location */
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pd |
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unsigned char *read_ptr; /* Read pointer location */
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rgentlem |
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int read_offset; /* Read pointer location */
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} IoBuffer;
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typedef struct TextBuffer {
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char *vmax; /* Memory stack top */
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maechler |
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unsigned char *buf; /* Line buffer */
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unsigned char *bufp; /* Line buffer location */
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rgentlem |
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SEXP text; /* String Vector */
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int ntext; /* Vector length */
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int offset; /* Offset within vector */
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} TextBuffer;
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maechler |
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#ifndef __MAIN__
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extern
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#endif
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IoBuffer R_ConsoleIob; /* Console IO Buffer */
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maechler |
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/*- some of these really could be void */
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rgentlem |
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int R_IoBufferInit(IoBuffer*);
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int R_IoBufferFree(IoBuffer*);
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int R_IoBufferReadReset(IoBuffer*);
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int R_IoBufferWriteReset(IoBuffer*);
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int R_IoBufferGetc(IoBuffer*);
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int R_IoBufferUngetc(int, IoBuffer*);
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int R_IoBufferPutc(int, IoBuffer*);
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int R_IoBufferPuts(char*, IoBuffer*);
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int R_TextBufferInit(TextBuffer*, SEXP);
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int R_TextBufferFree(TextBuffer*);
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int R_TextBufferGetc(TextBuffer*);
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int R_TextBufferUngetc(int, TextBuffer*);
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