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|
host( "working/awkemu.rl", 1 ) @{/*
* @@LANG: c
*/
/*
* Emulate the basic parser of the awk program. Breaks lines up into
* words and prints the words.
*/
#include <stdio.h>
#include <string.h>
#define LINEBUF 2048
static char lineBuf[LINEBUF];
static char blineBuf[LINEBUF];
static int lineLen;
static int blineLen;
static int words;
void finishLine();
struct awkemu
{
int cs;
};
void finishLine()
{
int i;
char *pword = blineBuf;
lineBuf[lineLen] = 0;
printf("endline(%i): %s\n", words, lineBuf );
for ( i = 0; i < words; i++ ) {
printf(" word: %s\n", pword );
pword += strlen(pword) + 1;
}
}
}@
array char _awkemu_trans_keys( 0, 1 ) = { 0, 1, 0, 1, 0, 1, 0 };
array s8 _awkemu_char_class( 0, 2 ) = { 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 0 };
array s8 _awkemu_index_offsets( 0, 4 ) = { 0, 2, 4, 0 };
array s8 _awkemu_indicies( 0, 7 ) = { 1, 2, 3, 4, 6, 7, 0 };
array s8 _awkemu_index_defaults( 0, 5 ) = { 0, 0, 5, 0 };
array s8 _awkemu_trans_cond_spaces( -1, 0 ) = { -1, -1, -1, -1, -1, -1, -1, -1, 0 };
array s8 _awkemu_cond_targs( 0, 2 ) = { 0, 1, 2, 1, 2, 0, 1, 2, 0 };
array s8 _awkemu_cond_actions( 0, 8 ) = { 1, 2, 3, 4, 5, 6, 7, 8, 0 };
array s8 _awkemu_nfa_targs( 0, 0 ) = { 0, 0 };
array s8 _awkemu_nfa_offsets( 0, 0 ) = { 0, 0, 0, 0 };
array s8 _awkemu_nfa_push_actions( 0, 0 ) = { 0, 0 };
array s8 _awkemu_nfa_pop_trans( 0, 0 ) = { 0, 0 };
value int awkemu_start = 2;
value int awkemu_first_final = 2;
value int awkemu_error = -1;
value int awkemu_en_main = 2;
host( "working/awkemu.rl", 101 ) @{
void awkemu_init( struct awkemu *fsm )
{
}@
{
host( "-", 1 ) ={ fsm->cs}= = cast(int)awkemu_start;
}
host( "working/awkemu.rl", 105 ) @{
}
void awkemu_execute( struct awkemu *fsm, const char *_data, int _len )
{
const char *p = _data;
const char *pe = _data+_len;
}@
{
uint _trans = 0;
uint _have = 0;
uint _cont = 1;
index char _keys;
index s8 _inds;
while ( _cont == 1 ) {
_have = 0;
if ( p == pe ) {
if ( _have == 0 )
_cont = 0;
}
if ( _cont == 1 ) {
if ( _have == 0 ) {
_keys = offset( _awkemu_trans_keys, (host( "-", 1 ) ={ fsm->cs}=<<1) );
_inds = offset( _awkemu_indicies, _awkemu_index_offsets[host( "-", 1 ) ={ fsm->cs}=] );
if ( ( deref( data, p )) <= 32 && ( deref( data, p )) >= 9 )
{
int _ic = cast(int)_awkemu_char_class[cast(int)( deref( data, p )) - 9];
if ( _ic <= cast(int)deref( _awkemu_trans_keys, _keys+1 ) && _ic >= cast(int)deref( _awkemu_trans_keys, _keys ) )
_trans = cast(uint)deref( _awkemu_indicies, _inds + cast(int)( _ic - cast(int)deref( _awkemu_trans_keys, _keys ) ) );
else
_trans = cast(uint)_awkemu_index_defaults[host( "-", 1 ) ={ fsm->cs}=];
}
else {
_trans = cast(uint)_awkemu_index_defaults[host( "-", 1 ) ={ fsm->cs}=];
}
}
if ( _cont == 1 ) {
host( "-", 1 ) ={ fsm->cs}= = cast(int)_awkemu_cond_targs[_trans];
switch ( _awkemu_cond_actions[_trans] ) {
case 4 {
host( "working/awkemu.rl", 54 ) ${
lineBuf[lineLen++] = ={( deref( data, p ))}=;
}$
}
case 5 {
host( "working/awkemu.rl", 78 ) ${ finishLine(); }$
}
case 7 {
host( "working/awkemu.rl", 33 ) ${
lineLen = 0;
blineLen = 0;
words = 0;
}$
host( "working/awkemu.rl", 54 ) ${
lineBuf[lineLen++] = ={( deref( data, p ))}=;
}$
}
case 8 {
host( "working/awkemu.rl", 33 ) ${
lineLen = 0;
blineLen = 0;
words = 0;
}$
host( "working/awkemu.rl", 78 ) ${ finishLine(); }$
}
case 1 {
host( "working/awkemu.rl", 41 ) ${
blineBuf[blineLen++] = ={( deref( data, p ))}=;
}$
host( "working/awkemu.rl", 54 ) ${
lineBuf[lineLen++] = ={( deref( data, p ))}=;
}$
}
case 2 {
host( "working/awkemu.rl", 47 ) ${
blineBuf[blineLen++] = 0;
words += 1;
}$
host( "working/awkemu.rl", 54 ) ${
lineBuf[lineLen++] = ={( deref( data, p ))}=;
}$
}
case 3 {
host( "working/awkemu.rl", 47 ) ${
blineBuf[blineLen++] = 0;
words += 1;
}$
host( "working/awkemu.rl", 78 ) ${ finishLine(); }$
}
case 6 {
host( "working/awkemu.rl", 33 ) ${
lineLen = 0;
blineLen = 0;
words = 0;
}$
host( "working/awkemu.rl", 41 ) ${
blineBuf[blineLen++] = ={( deref( data, p ))}=;
}$
host( "working/awkemu.rl", 54 ) ${
lineBuf[lineLen++] = ={( deref( data, p ))}=;
}$
}
}
if ( _cont == 1 )
p += 1;
}}
}
}
host( "working/awkemu.rl", 112 ) @{
}
int awkemu_finish( struct awkemu *fsm )
{
if ( fsm->cs == awkemu_error )
return -1;
if ( fsm->cs >= awkemu_first_final )
return 1;
return 0;
}
#include <stdio.h>
#define BUFSIZE 2048
struct awkemu fsm;
char buf[BUFSIZE];
void test( char *buf )
{
int len = strlen( buf );
awkemu_init( &fsm );
awkemu_execute( &fsm, buf, len );
if ( awkemu_finish( &fsm ) > 0 )
printf("ACCEPT\n");
else
printf("FAIL\n");
}
int main()
{
test( "" );
test( "one line with no newline" );
test( "one line\n" );
return 0;
}
}@
|
