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/*
* This file is part of flex.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/
%{
/* A file to build "scanner.c". */
/* This tests that we can use "yyextra".
We buffer all input into a growable array, then print it.
We run diff on the input and output.
*/
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
/* We'll store the entire input in this buffer, growing as necessary. */
struct Buffer {
int curr_len;
int max_len;
int grow_len;
char * data;
};
#define YY_EXTRA_TYPE struct Buffer *
/* Save char into junk array at next position. */
static void append_char (char c, yyscan_t scanner );
%}
%option 8bit prefix="test"
%option nounput nomain noyywrap nodefault noinput
%option warn
%option reentrant
%%
.|\r|\n { append_char (yytext[0],yyscanner); }
%%
int main(void);
int
main ()
{
yyscan_t scanner;
struct Buffer * buf;
int i;
buf = malloc(sizeof(struct Buffer));
buf->curr_len =0;
buf->max_len = 4;
buf->grow_len = 100;
buf->data = malloc(buf->max_len);
testlex_init(&scanner);
testset_in( stdin, scanner);
testset_out( stdout, scanner);
testset_extra( buf, scanner );
testlex(scanner);
buf = testget_extra(scanner);
for(i=0; i < buf->curr_len; i++)
fputc( buf->data[i], stdout );
free( buf->data);
free( buf);
testlex_destroy(scanner);
return 0;
}
/* Save char into junk array at next position. */
static void append_char (char c, yyscan_t scanner )
{
struct Buffer *buf, *new_buf;
buf = testget_extra(scanner);
/* Grow buffer if necessary. */
if( buf->curr_len >= buf->max_len )
{
new_buf = malloc(sizeof(struct Buffer));
new_buf->max_len = buf->max_len + buf->grow_len;
new_buf->grow_len = buf->grow_len;
new_buf->data = malloc(new_buf->max_len);
for( new_buf->curr_len = 0;
new_buf->curr_len < buf->curr_len;
new_buf->curr_len++ )
{
new_buf->data[ new_buf->curr_len] = buf->data [ new_buf->curr_len];
}
free( buf->data );
free( buf );
buf = new_buf;
testset_extra( buf, scanner );
}
buf->data[ buf->curr_len++ ] = c;
}
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