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#include <stdio.h>
#include <stdlib.h>
#include "eo_tokenizer.h"
%%{
machine common;
action inc_line {
toknz->current_line += 1;
}
action save_start_line {
toknz->token_start_line = toknz->current_line;
}
cr = '\n';
cr_neg = "[^\n]";
ws = "[ \t\r]";
newline = cr @inc_line;
ignore = (0x00..0x20 - cr)* newline?;
c_comment = "/*" ( any | '\n' @inc_line )* :>> "*/";
cpp_comment = "//" (any - cr)* newline;
comment = ( c_comment | cpp_comment ) > save_start_line;
}%%
%%{
machine eo_tokenizer;
include common;
access toknz->;
variable p toknz->p;
variable pe toknz->pe;
variable eof toknz->eof;
action show_comment {
DBG("comment %03d:%03d", toknz->token_start_line, toknz->current_line);
}
action show_ignore {
DBG("ignore %d (%d)", toknz->current_line, (toknz->te - toknz->ts));
}
action error {
/* TODO find a more elegant way,
* -> cant't use $err() or $!error on scanner
* -> fgoto another machine to eat the line, ts is set to NULL
*/
char buf[BUFSIZE];
char *s, *d;
for (s = fpc, d = buf; (s <= toknz->pe); s++)
{
if ( (int)*s == 13 || (int)*s == 10)
break;
*d++ = *s;
}
*d = '\0';
ERR("error line %d : %s...", toknz->current_line, buf);
toknz->cs = eo_tokenizer_error;
fbreak;
}
main := |*
ignore => show_ignore;
comment => show_comment;
any => error;
*|;
}%%
%% write data;
Eina_Bool
eo_tokenizer_walk(Eo_Tokenizer *toknz, const char *source)
{
INF("tokenize %s...", source);
toknz->source = eina_stringshare_add(source);
FILE *stream;
int done = 0;
int have = 0;
stream = fopen(toknz->source, "r");
if (!stream)
{
ERR("unable to read in %s", toknz->source);
return EINA_FALSE;
}
%% write init;
while (!done)
{
int len;
int space;
toknz->p = toknz->buf + have;
space = BUFSIZE - have;
if (space == 0)
{
ERR("out of buffer space");
fclose(stream);
exit(EXIT_FAILURE);
}
len = fread(toknz->p, 1, space, stream);
if (len == 0) break;
toknz->pe = toknz->p + len;
if (len < space)
{
toknz->eof = toknz->pe;
done = 1;
}
%% write exec;
if ( toknz->cs == %%{ write error; }%% )
break;
if ( toknz->ts == 0 )
have = 0;
else
{
/* There is a prefix to preserve, shift it over. */
have = toknz->pe - toknz->ts;
memmove( toknz->buf, toknz->ts, have);
toknz->te = toknz->buf + (toknz->te - toknz->ts);
toknz->ts = toknz->buf;
}
}
fclose(stream);
return EINA_TRUE;
}
Eo_Tokenizer*
eo_tokenizer_get()
{
Eo_Tokenizer *toknz = calloc(1, sizeof(Eo_Tokenizer));
if (!toknz) return NULL;
toknz->ts = NULL;
toknz->te = NULL;
/* toknz->top = 0; */
toknz->source = NULL;
toknz->max_nesting = 10;
toknz->current_line = 1;
toknz->current_nesting = 0;
toknz->token_start_line = 0;
return toknz;
}
void
eo_tokenizer_free(Eo_Tokenizer *toknz)
{
if (toknz->source)
eina_stringshare_del(toknz->source);
free(toknz);
}
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