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/*--------------------------------------------------------------*
sang --- Suffix Array Ѥ N-gram פȤץ
USAGE sang -n NUM -t NUM FILENAME
OPTION
-n NUM : NUM n-gram n ꤹ롣
-t NUM : threshold: NUMʲ٤ΤΤɽʤ
n-gram ˤϲԤϴޤޤʤ
[¹]
> cat test
ABCBACABBAACABCABCACABACABBACBACACAAABACCAB
> makeary -q test arrayեκ
> sang -n 6 -t 1 test 6-gram ٤ 1 礭Τɽ
2 ACABBA
2 BACABB
> sang -n 3 -t 4 test trigram ٤ 4 礭Τɽ
6 ACA
5 BAC
6 CAB
971029 Version 0.1 ãͺ(tatuo-y@is,aist-nara.ac.jp)
980327 Version 0.2 NEW sa_sel() Τν, BUGFIX:ǸN-gram̤ɽ
*--------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "sufary.h"
static void usage(void);
void do_sang(char *fname, int ng, int threshold);
void hyouji(char *nstr, int n_ctr, int threshold);
char nstr[1000]; /* n-gram Ե */
/**********************************************
ᥤᥤᥤᥤᥤᥤᥤ
**********************************************/
int main(int argc, char *argv[])
{
int ng; /* n-gram n */
int threshold = 0; /* thresold */
/****** ******/
if(argc <= 1){
usage();
exit(1);
}
while (argc > 1){
/* ץ */
if (argv[1][0] == '-')
switch (argv[1][1]){
/* n-gramn */
case 'n':
ng = atoi(argv[2]);
argc--; argv++;
break;
/* threshold: ʲ٤ΤΤɽʤ */
case 't':
threshold = atoi(argv[2]);
argc--; argv++;
break;
/* 顼 */
default :
usage();
exit(1);
}
else{
/* n-gramץ롼Ƥ */
do_sang(argv[1], ng, threshold);
}
/* Ĥΰ */
argc--; argv++;
}
/* λ */
return 0;
}
/**********************************************
* void do_sang(char *fname, int ng, int threshold)
*
* purpose
* n-gramפȤ
*
* parameters
* fname : ե̾
* ng : -gram
* threshold : ɽ(ʲ٤ΤΤɽ)
*
* return value
* ʤ
**********************************************/
void do_sang(char *fname, int ng, int threshold)
{
char *s;
long tmp;
int n_ctr = 0;
SUFARY *ary;
char *p;
/****** ƥ/쥤ե ******/
if ((ary = sa_openfiles(fname,NULL)) == NULL){
printf("argument ignored.\n");
usage();
exit(1);
}
nstr[0] = '\0';
/* printf("%ld %ld\n",sa_bottom(ary),sa_top(ary)); */
/* aryƤǤФƥ롼 */
for (tmp = sa_bottom(ary); tmp <= sa_top(ary); tmp++){
/* ƥȤ */
p = sa_aryidx2txtptr(ary, tmp);
/* Ʊn-gram䤹 */
if(strncmp(p,nstr,ng) == 0){
n_ctr++;
}else{
if(*nstr != '\0' && !strstr(nstr,"\n"))
hyouji(nstr,n_ctr,threshold);/* ͰʾΤΤʸɻߤɽ */
/* ĤΥȥ */
strncpy(nstr,p,ng);
n_ctr = 0;
}
}
hyouji(nstr,n_ctr,threshold);/* ͰʾΤΤʸɻߤɽ */
/* */
sa_closefiles(ary);
/* λ */
return;
}
/**********************************************
* void hyouji(char *nstr, int n_ctr, int threshold)
*
* purpose
* n-gramɽ
*
* parameters
* nstr : n-gramʸؤΥݥ
* n_ctr : n-gramʸνиĿ
* threshold : ɽ(ʲ٤ΤΤɽ)
*
* return value
* ʤ
**********************************************/
void hyouji(char *nstr, int n_ctr, int threshold)
{
/* ͰʾΤΤʸɻߤɽ */
if(n_ctr >= threshold){
mojibakebousi(nstr,0);
printf("%d %s\n",n_ctr+1,nstr);
}
}
/**************
Ȥɽ
**************/
void usage(){
fprintf(stderr, "Version 0.2 970327 YAMASITA Tatuo (tatuo-y@cl.aist-nara.ac.jp)\nUSAGE sang -n NUM -t NUM FILENAME\nOPTION\n -n NUM : N for N-gram\n -t NUM : threshold\n");
}
/* from show.c(for 'array') */
/**********************************************
* void mojibakebousi(char *buf);
*
* purpose
* ʸλijĤ֤üʸĤ֤
* parameters
* buf: о
* haba: ɤβʸ褫ɤफ
* return value
*
* description
*
**********************************************/
int mojibakebousi(char *buf,int haba){
int i, pre_hankaku, post_hankaku;
pre_hankaku = 0; /* ɤȾʸο */
post_hankaku = 0; /* ɤȾʸο */
for(i = 0; i < strlen(buf); i++) {
if((unsigned char)buf[i] < 0x80){ /* Ⱦʸ */
if(i < haba) pre_hankaku++;
else post_hankaku++;
if((unsigned char)buf[i] < 0x20) buf[i] = '!'; /* üʸ ! */
}
}
/* ʸɻ: Ƭ˴θʬ褿Ȥ % ˤ롥 */
if(pre_hankaku % 2 == 1) buf[0] = '%';
/* : Ǹ˴ʬ褿Ȥ % ˤ롥 */
if(post_hankaku % 2 == 1 && strlen(buf) % 2 == 0) buf[i-1] = '%';
if(post_hankaku % 2 == 0 && strlen(buf) % 2 == 1) buf[i-1] = '%';
return pre_hankaku;
}
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