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/* This file is part of the software similarity tester SIM.
Written by Dick Grune, Vrije Universiteit, Amsterdam.
$Id: add_run.c,v 2.5 2001/11/08 12:30:28 dick Exp $
*/
#include <malloc.h>
#include "sim.h"
#include "runs.h"
#include "percentages.h"
#include "options.h"
#include "error.h"
#include "add_run.h"
static void set_chunk(
struct chunk *,
struct text *,
unsigned int,
unsigned int
);
static void set_pos(
struct position *,
int,
struct text *,
unsigned int
);
void
add_run(struct text *txt0, unsigned int i0,
struct text *txt1, unsigned int i1,
unsigned int size
) {
/* Adds the run of given size to our collection.
*/
register struct run *r = (struct run *)malloc(sizeof (struct run));
if (!r) fatal("out of memory");
set_chunk(&r->rn_cn0, txt0, i0 - txt0->tx_start, size);
set_chunk(&r->rn_cn1, txt1, i1 - txt1->tx_start, size);
r->rn_size = size;
if (option_set('p') ? add_to_percentages(r) : add_to_runs(r)) {
/* OK */
}
else fatal("out of memory");
}
static void
set_chunk(struct chunk *cnk, struct text *txt,
unsigned int start, unsigned int size
) {
/* Fill the chunk *cnk with info about the piece of text
in txt starting at start extending over size tokens.
*/
cnk->ch_text = txt;
set_pos(&cnk->ch_first, 0, txt, start);
set_pos(&cnk->ch_last, 1, txt, start + size - 1);
}
static void
set_pos(struct position *pos, int type, struct text *txt, unsigned int start) {
/* Fill a single struct position */
pos->ps_next = txt->tx_pos;
txt->tx_pos = pos;
pos->ps_type = type;
pos->ps_tk_cnt = start;
pos->ps_nl_cnt = -1; /* uninitialized */
}
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