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138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
#ifndef STREAM2_H
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#define STREAM2_H
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/*
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Copyright (c) 2001, Richard Krehbiel
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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o Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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o Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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o Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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DAMAGE.
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*/
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#include <stdio.h>
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struct stream;
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typedef struct stream_vtbl {
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void (
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*delete) (
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struct stream * stream); // Destructor
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char *(
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*gets) (
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struct stream * stream); // "gets" function
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void (
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*rewind) (
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struct stream * stream); // "rewind" function
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} STREAM_VTBL;
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typedef struct stream {
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STREAM_VTBL *vtbl; // Pointer to dispatch table
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char *name; // Stream name
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int line; // Current line number in stream
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struct stream *next; // Next stream in stack
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} STREAM;
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typedef struct file_stream {
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STREAM stream; // Base class
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FILE *fp; // File pointer
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char *buffer; // Line buffer
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} FILE_STREAM;
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typedef struct buffer {
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char *buffer; // Pointer to text
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int size; // Size of buffer
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int length; // Occupied size of buffer
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int use; // Number of users of buffer
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} BUFFER;
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#define GROWBUF_INCR 1024 // Buffers grow by leaps and bounds
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typedef struct buffer_stream {
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STREAM stream; // Base class
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BUFFER *buffer; // text buffer
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int offset; // Current read offset
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} BUFFER_STREAM;
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typedef struct stack {
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STREAM *top; // Top of stacked stream pieces
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} STACK;
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#define STREAM_BUFFER_SIZE 1024 // This limits the max size of an input line.
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BUFFER *new_buffer(
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void);
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BUFFER *buffer_clone(
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BUFFER *from);
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void buffer_resize(
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BUFFER *buff,
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int size);
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void buffer_free(
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BUFFER *buf);
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void buffer_appendn(
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BUFFER *buf,
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char *str,
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int len);
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void buffer_append_line(
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BUFFER *buf,
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char *str);
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STREAM *new_buffer_stream(
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BUFFER *buf,
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char *name);
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void buffer_stream_set_buffer(
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BUFFER_STREAM * bstr,
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BUFFER *buf);
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/* Provide these so that macro11 can derive from a BUFFER_STREAM */
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extern STREAM_VTBL buffer_stream_vtbl;
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void buffer_stream_construct(
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BUFFER_STREAM * bstr,
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BUFFER *buf,
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char *name);
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char *buffer_stream_gets(
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STREAM *str);
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void buffer_stream_delete(
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STREAM *str);
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void buffer_stream_rewind(
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STREAM *str);
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STREAM *new_file_stream(
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char *filename);
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void stack_init(
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STACK *stack);
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void stack_push(
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STACK *stack,
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STREAM *str);
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void stack_pop(
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STACK *stack);
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char *stack_gets(
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STACK *stack);
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#endif /* STREAM2_H */
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