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scws.c
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/*
* @file scws.c (core segment functions)
* @author Hightman Mar
* @editor set number ; syntax on ; set autoindent ; set tabstop=4 (vim)
* $Id $
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef WIN32
#include "config_win32.h"
#endif
#include "scws.h"
#include "xdict.h"
#include "rule.h"
#include "charset.h"
#include "darray.h"
#include "xtree.h"
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
/* quick macro define for frequency usage */
#define SCWS_IS_SPECIAL(x,l) scws_rule_checkbit(s->r,x,l,SCWS_RULE_SPECIAL)
#define SCWS_IS_NOSTATS(x,l) scws_rule_checkbit(s->r,x,l,SCWS_RULE_NOSTATS)
#define SCWS_CHARLEN(x) s->mblen[(x)]
#define SCWS_IS_ALNUM(x) (((x)>=48&&(x)<=57)||((x)>=65&&(x)<=90)||((x)>=97&&(x)<=122))
#define SCWS_IS_ALPHA(x) (((x)>=65&&(x)<=90)||((x)>=97&&(x)<=122))
#define SCWS_IS_UALPHA(x) ((x)>=65&&(x)<=90)
#define SCWS_IS_DIGIT(x) ((x)>=48&&(x)<=57)
#define SCWS_IS_WHEAD(x) ((x) & SCWS_ZFLAG_WHEAD)
#define SCWS_IS_ECHAR(x) ((x) & SCWS_ZFLAG_ENGLISH)
#define SCWS_NO_RULE1(x) (((x) & (SCWS_ZFLAG_SYMBOL|SCWS_ZFLAG_ENGLISH))||(((x) & (SCWS_ZFLAG_WHEAD|SCWS_ZFLAG_NR2)) == SCWS_ZFLAG_WHEAD))
///#define SCWS_NO_RULE2(x) (((x) & SCWS_ZFLAG_ENGLISH)||(((x) & (SCWS_ZFLAG_WHEAD|SCWS_ZFLAG_N2)) == SCWS_ZFLAG_WHEAD))
#define SCWS_NO_RULE2 SCWS_NO_RULE1
#define SCWS_MAX_EWLEN 33
///hightman.070706: char token
#define SCWS_CHAR_TOKEN(x) ((x)=='('||(x)==')'||(x)=='['||(x)==']'||(x)=='{'||(x)=='}'||(x)==':'||(x)=='"')
///hightman.070814: max zlen = ?? (4 * zlen * zlen = ??)
#define SCWS_MAX_ZLEN 128
#define SCWS_EN_IDF(x) (float)(2.5*logf(x))
static const char *attr_en = "en";
static const char *attr_un = "un";
static const char *attr_nr = "nr";
static const char *attr_na = "!";
/* create scws engine */
scws_t scws_new() {
scws_t s;
s = (scws_t) malloc(sizeof (scws_st));
if (s == NULL)
return s;
memset(s, 0, sizeof (scws_st));
s->mblen = charset_table_get(NULL);
s->off = s->len = 0;
s->wend = -1;
return s;
}
/* hightman.110320: fork scws */
scws_t scws_fork(scws_t p) {
scws_t s = scws_new();
if (p != NULL && s != NULL) {
s->mblen = p->mblen;
s->mode = p->mode;
// fork dict/rules
s->r = scws_rule_fork(p->r);
s->d = xdict_fork(p->d);
}
return s;
}
/* close & free the engine */
void scws_free(scws_t s) {
if (s->d) {
xdict_close(s->d);
s->d = NULL;
}
if (s->r) {
scws_rule_free(s->r);
s->r = NULL;
}
free(s);
}
/* add a dict into scws */
int scws_add_dict(scws_t s, const char *fpath, int mode) {
xdict_t xx;
if (mode & SCWS_XDICT_SET) {
xdict_close(s->d);
mode ^= SCWS_XDICT_SET;
s->d = NULL;
}
xx = s->d;
s->d = xdict_add(s->d, fpath, mode, s->mblen);
return (xx == s->d ? -1 : 0);
}
/* set the dict & open it */
int scws_set_dict(scws_t s, const char *fpath, int mode) {
return scws_add_dict(s, fpath, mode | SCWS_XDICT_SET);
}
void scws_set_charset(scws_t s, const char *cs) {
s->mblen = charset_table_get(cs);
}
void scws_set_rule(scws_t s, const char *fpath) {
if (s->r != NULL)
scws_rule_free(s->r);
s->r = scws_rule_new(fpath, s->mblen);
}
/* set ignore symbol or multi segments */
void scws_set_ignore(scws_t s, int yes) {
if (yes == SCWS_YEA)
s->mode |= SCWS_IGN_SYMBOL;
if (yes == SCWS_NA)
s->mode &= ~SCWS_IGN_SYMBOL;
}
void scws_set_multi(scws_t s, int mode) {
s->mode &= ~SCWS_MULTI_MASK;
if (mode & SCWS_MULTI_MASK)
s->mode |= mode;
}
void scws_set_debug(scws_t s, int yes) {
if (yes == SCWS_YEA)
s->mode |= SCWS_DEBUG;
if (yes == SCWS_NA)
s->mode &= ~SCWS_DEBUG;
}
void scws_set_duality(scws_t s, int yes) {
if (yes == SCWS_YEA)
s->mode |= SCWS_DUALITY;
if (yes == SCWS_NA)
s->mode &= ~SCWS_DUALITY;
}
/* send the text buffer & init some others */
void scws_send_text(scws_t s, const char *text, int len) {
s->txt = (unsigned char *) text;
s->len = len;
s->off = 0;
}
/* get some words, if these is not words, return NULL */
#define SCWS_PUT_RES(o,i,l,a) \
do { \
scws_res_t res; \
res = (scws_res_t) malloc(sizeof(struct scws_result)); \
res->off = o; \
res->idf = i; \
res->len = l; \
strncpy(res->attr, a, 2); \
res->attr[2] = '\0'; \
res->next = NULL; \
if (s->res1 == NULL) \
s->res1 = s->res0 = res; \
else \
{ \
s->res1->next = res; \
s->res1 = res; \
} \
} while(0)
/* single bytes segment (纯单字节字符) */
#define PFLAG_WITH_MB 0x01
#define PFLAG_ALNUM 0x02
#define PFLAG_VALID 0x04
#define PFLAG_DIGIT 0x08
#define PFLAG_ADDSYM 0x10
#define PFLAG_ALPHA 0x20
#define PFLAG_LONGDIGIT 0x40
#define PFLAG_LONGALPHA 0x80
static void _str_toupper(char *src, char *dst) {
while (*src) {
*dst++ = *src++;
if (dst[-1] >= 'a' && dst[-1] <= 'z')
dst[-1] ^= 0x20;
}
}
static void _str_tolower(char *src, char *dst) {
while (*src) {
*dst++ = *src++;
if (dst[-1] >= 'A' && dst[-1] <= 'Z')
dst[-1] ^= 0x20;
}
}
#ifdef HAVE_STRNDUP
#define _mem_ndup strndup
#else
static inline void *_mem_ndup(const char *src, int len) {
char *dst;
dst = malloc(len + 1);
memcpy(dst, src, len);
dst[len] = '\0';
return dst;
}
#endif
static void _scws_alnum_multi(scws_t s, int start, int wlen) {
char chunk[SCWS_MAX_EWLEN];
int i, j, k, ch, pflag;
unsigned char *txt;
float idf;
txt = s->txt;
pflag = 0;
for (i = j = k = 0; i < wlen; i++) {
ch = txt[start + i];
if (SCWS_IS_DIGIT(ch)) {
if (pflag & PFLAG_DIGIT)
continue;
if (pflag != 0) {
chunk[j++] = (char) (i - k);
k = i;
}
pflag = PFLAG_DIGIT;
} else if (SCWS_IS_ALPHA(ch)) {
if (pflag & PFLAG_ALPHA)
continue;
if (pflag != 0) {
chunk[j++] = (char) (i - k);
k = i;
}
pflag = PFLAG_ALPHA;
} else {
if (pflag & PFLAG_ADDSYM)
continue;
if (pflag != 0) {
chunk[j++] = (char) (i - k);
k = i;
}
pflag = PFLAG_ADDSYM;
}
}
if (j > 0) {
chunk[j] = (char) (i - k);
ch = start;
for (i = 0; i <= j; i++) {
if (!SCWS_IS_ALNUM(txt[ch])) {
// just skip
} else if (chunk[i] == 1) {
if (i > 0 && chunk[i - 1] > 1 && (i != 1 || i != j)) {
if (!SCWS_IS_ALNUM(txt[ch - 1])) {
idf = SCWS_EN_IDF(chunk[i]);
SCWS_PUT_RES(ch, idf, chunk[i], attr_en);
} else {
idf = SCWS_EN_IDF(chunk[i - 1] + 1);
SCWS_PUT_RES(ch - chunk[i - 1], idf, chunk[i - 1] + 1, attr_en);
}
}
if (i < j && (i != 0 || j != 1)) {
if (!SCWS_IS_ALNUM(txt[ch + 1])) {
idf = SCWS_EN_IDF(chunk[i]);
SCWS_PUT_RES(ch, idf, chunk[i], attr_en);
} else {
idf = SCWS_EN_IDF(chunk[i + 1] + 1);
SCWS_PUT_RES(ch, idf, chunk[i + 1] + 1, attr_en);
}
}
} else {
idf = SCWS_EN_IDF(chunk[i]);
SCWS_PUT_RES(ch, idf, chunk[i], attr_en);
}
ch += chunk[i];
}
}
}
static void _scws_ssegment(scws_t s, int end) {
int start, wlen, ch, pflag, ipflag = 0;
unsigned char *txt;
float idf;
start = s->off;
wlen = end - start;
/* check special words (need strtoupper) */
if (wlen > 1) {
txt = (char *) _mem_ndup(s->txt + start, wlen);
_str_toupper(txt, txt);
if (SCWS_IS_SPECIAL(txt, wlen)) {
SCWS_PUT_RES(start, 9.5, wlen, "nz");
free(txt);
return;
}
free(txt);
}
txt = s->txt;
/* check brief words such as S.H.E M.R. */
if (SCWS_IS_ALPHA(txt[start]) && txt[start + 1] == '.') {
for (ch = start + 2; ch < end; ch++) {
if (!SCWS_IS_ALPHA(txt[ch])) break;
ch++;
if (ch == end || txt[ch] != '.') break;
}
if (ch == end) {
SCWS_PUT_RES(start, 7.5, wlen, "nz");
return;
}
}
/* 取出单词及标点. 数字允许一个点且下一个为数字,不连续的. 字母允许一个不连续的' */
while (start < end) {
ch = txt[start++];
if (ipflag && ch != 0x2e && !SCWS_IS_DIGIT(ch))
ipflag = 0;
if (SCWS_IS_ALNUM(ch)) {
pflag = SCWS_IS_DIGIT(ch) ? PFLAG_DIGIT : 0;
wlen = 1;
while (start < end) {
ch = txt[start];
if (pflag & PFLAG_DIGIT) {
if (!SCWS_IS_DIGIT(ch)) {
// check percent % = 0x25
if (ch == 0x25 && !SCWS_IS_DIGIT(txt[start + 1])) {
start++;
wlen++;
break;
}
if (ipflag)
break;
// special for IP address or version number? (find out all digit + dot)
if (ch == 0x2e && (pflag & PFLAG_ADDSYM)) {
ipflag = 1;
while (--wlen && txt[--start] != 0x2e);
pflag = 0;
break;
}
// wlen = 1
if (wlen == 1 && SCWS_IS_ALPHA(ch)) {
pflag ^= PFLAG_DIGIT;
pflag |= PFLAG_ADDSYM;
continue;
}
// strict must add: !$this->_is_digit(ord($this->txt[$start+1])))
if ((pflag & PFLAG_ADDSYM) || !(ch == 0x2e && SCWS_IS_DIGIT(txt[start + 1])))
break;
pflag |= PFLAG_ADDSYM;
}
} else {
/* hightman.110419: - 出现在字母中间允许连接(0x2d), _ 允许连接(0x5f) */
if ((ch == 0x2d || ch == 0x5f) && SCWS_IS_ALPHA(txt[start + 1]))
pflag |= PFLAG_ADDSYM;
else if (!SCWS_IS_ALPHA(ch)) {
if ((pflag & PFLAG_ADDSYM)
|| !((ch == 0x27 && SCWS_IS_ALPHA(txt[start + 1]))
|| (SCWS_IS_DIGIT(ch) && !SCWS_IS_DIGIT(txt[start + 1])))) {
break;
}
pflag |= PFLAG_ADDSYM;
}
}
start++;
wlen++;
if (wlen >= SCWS_MAX_EWLEN)
break;
}
idf = SCWS_EN_IDF(wlen);
SCWS_PUT_RES(start - wlen, idf, wlen, attr_en);
if ((s->mode & SCWS_MULTI_DUALITY) && (pflag & PFLAG_ADDSYM))
_scws_alnum_multi(s, start - wlen, wlen);
} else if (!(s->mode & SCWS_IGN_SYMBOL)) {
SCWS_PUT_RES(start - 1, 0.0, 1, attr_un);
}
}
}
/* multibyte segment */
static int _scws_mget_word(scws_t s, int i, int j) {
int r, k;
word_t item;
if (!(s->wmap[i][i]->flag & SCWS_ZFLAG_WHEAD))
return i;
for (r = i, k = i + 1; k <= j; k++) {
item = s->wmap[i][k];
if (item && (item->flag & SCWS_WORD_FULL)) {
r = k;
if (!(item->flag & SCWS_WORD_PART))
break;
}
}
return r;
}
static void _scws_mset_word(scws_t s, int i, int j) {
word_t item;
item = s->wmap[i][j];
/* hightman.070705: 加入 item == null 判断, 防止超长词(255字以上)unsigned char溢出 */
if ((item == NULL) || ((s->mode & SCWS_IGN_SYMBOL)
&& !SCWS_IS_ECHAR(item->flag) && !memcmp(item->attr, attr_un, 2)))
return;
/* hightman.070701: 散字自动二元聚合 */
if (s->mode & SCWS_DUALITY) {
int k = s->zis;
if (i == j && !SCWS_IS_ECHAR(item->flag) && memcmp(item->attr, attr_un, 2)) {
s->zis = i;
if (k < 0)
return;
i = (k & ~SCWS_ZIS_USED);
if ((i != (j - 1)) || (!(k & SCWS_ZIS_USED) && s->wend == i)) {
SCWS_PUT_RES(s->zmap[i].start, s->wmap[i][i]->idf, (s->zmap[i].end - s->zmap[i].start), s->wmap[i][i]->attr);
if (i != (j - 1))
return;
}
s->zis |= SCWS_ZIS_USED;
} else {
if ((k >= 0) && (!(k & SCWS_ZIS_USED) || (j > i))) {
k &= ~SCWS_ZIS_USED;
SCWS_PUT_RES(s->zmap[k].start, s->wmap[k][k]->idf, (s->zmap[k].end - s->zmap[k].start), s->wmap[k][k]->attr);
}
if (j > i)
s->wend = j + 1;
s->zis = -1;
}
}
SCWS_PUT_RES(s->zmap[i].start, item->idf, (s->zmap[j].end - s->zmap[i].start), item->attr);
// hightman.070902: multi segment
// step1: split to short words
if ((j - i) > 1) {
int n, k, m = i;
if (s->mode & SCWS_MULTI_SHORT) {
while (m < j) {
k = m;
// hightman.111223: multi short enhanced
for (n = m + 1; n <= j; n++) {
// 3 chars at most
if ((n == j && m == i) || (n - m) > 2) break;
item = s->wmap[m][n];
if (!item) continue;
// first shortest or last longest word
if ((item->flag & SCWS_WORD_FULL) && (k == m || n == j))
k = n;
if (!(item->flag & SCWS_WORD_PART)) break;
}
// short word not found, stop to find, passed to next loop
if (k == m)
break;
// save the short word
item = s->wmap[m][k];
SCWS_PUT_RES(s->zmap[m].start, item->idf, (s->zmap[k].end - s->zmap[m].start), item->attr);
// find the next word or go to prev for duality last word
if ((m = k + 1) == j) {
m--;
break;
}
}
}
if (s->mode & SCWS_MULTI_DUALITY) {
while (m < j) {
if (SCWS_IS_ECHAR(s->wmap[m][m]->flag)) {
SCWS_PUT_RES(s->zmap[m].start, s->wmap[m][m]->idf, (s->zmap[m].end - s->zmap[m].start), s->wmap[m][m]->attr);
s->wmap[m][m]->flag |= SCWS_ZFLAG_PUT;
} else if (SCWS_IS_ECHAR(s->wmap[m + 1][m + 1]->flag)) {
if (m == i) {
SCWS_PUT_RES(s->zmap[m].start, s->wmap[m][m]->idf, (s->zmap[m].end - s->zmap[m].start), s->wmap[m][m]->attr);
s->wmap[m][m]->flag |= SCWS_ZFLAG_PUT;
}
m++;
SCWS_PUT_RES(s->zmap[m].start, s->wmap[m][m]->idf, (s->zmap[m].end - s->zmap[m].start), s->wmap[m][m]->attr);
s->wmap[m][m]->flag |= SCWS_ZFLAG_PUT;
} else {
SCWS_PUT_RES(s->zmap[m].start, s->wmap[m][m]->idf, (s->zmap[m + 1].end - s->zmap[m].start), s->wmap[m][m]->attr);
}
m++;
if (m == j && (SCWS_IS_ECHAR(s->wmap[m][m]->flag) || SCWS_IS_ECHAR(s->wmap[m - 1][m - 1]->flag))) {
SCWS_PUT_RES(s->zmap[m].start, s->wmap[m][m]->idf, (s->zmap[m].end - s->zmap[m].start), s->wmap[m][m]->attr);
s->wmap[m][m]->flag |= SCWS_ZFLAG_PUT;
}
}
}
}
// step2, split to single char
if ((j > i) && (s->mode & (SCWS_MULTI_ZMAIN | SCWS_MULTI_ZALL))) {
if ((j - i) == 1 && !s->wmap[i][j]) {
if (s->wmap[i][i]->flag & SCWS_ZFLAG_PUT) i++;
else s->wmap[i][i]->flag |= SCWS_ZFLAG_PUT;
s->wmap[j][j]->flag |= SCWS_ZFLAG_PUT;
}
do {
if (s->wmap[i][i]->flag & SCWS_ZFLAG_PUT)
continue;
if (!(s->mode & SCWS_MULTI_ZALL) && !strchr("jnv", s->wmap[i][i]->attr[0]))
continue;
SCWS_PUT_RES(s->zmap[i].start, s->wmap[i][i]->idf, (s->zmap[i].end - s->zmap[i].start), s->wmap[i][i]->attr);
} while (++i <= j);
}
}
static void _scws_mseg_zone(scws_t s, int f, int t) {
unsigned char *mpath, *npath;
word_t **wmap;
int x, i, j, m, n, j2, sz;
double weight, nweight;
char attr1[3];
mpath = npath = NULL;
weight = nweight = (double) 0.0;
wmap = s->wmap;
j2 = 0;
for (x = i = f; i <= t; i++) {
j = _scws_mget_word(s, i, (x > i ? x - 1 : t));
if (j == i) continue;
// skip NR in NR
if (j < j2 && wmap[i][j]->attr[0] == 'n' && wmap[i][j]->attr[1] == 'r') continue;
if (i > j2 && (wmap[i][j]->flag & SCWS_WORD_USED)) continue;
/* one word only */
if (i == f && j == t) {
mpath = (unsigned char *) malloc(2);
mpath[0] = j - i;
mpath[1] = 0xff;
break;
}
if (i != f && (wmap[i][j]->flag & SCWS_WORD_RULE))
continue;
/* create the new path */
wmap[i][j]->flag |= SCWS_WORD_USED;
nweight = (double) wmap[i][j]->tf * pow(j - i, 4);
if (npath == NULL) {
npath = (unsigned char *) malloc(t - f + 2);
memset(npath, 0xff, t - f + 2);
}
/* lookfor backward */
x = sz = 0;
memset(attr1, 0, sizeof (attr1));
for (m = f; m < i; m = n + 1) {
n = _scws_mget_word(s, m, i - 1);
nweight *= wmap[m][n]->tf;
npath[x++] = n - m;
if (n > m) {
nweight *= pow(n - m, 4);
wmap[m][n]->flag |= SCWS_WORD_USED;
} else sz++;
if (attr1[0] != '\0')
nweight *= scws_rule_attr_ratio(s->r, attr1, wmap[m][n]->attr, &npath[x - 2]);
memcpy(attr1, wmap[m][n]->attr, 2);
}
/* my self */
npath[x++] = j - i;
if (attr1[0] != '\0')
nweight *= scws_rule_attr_ratio(s->r, attr1, wmap[i][j]->attr, &npath[x - 2]);
memcpy(attr1, wmap[i][j]->attr, 2);
/* lookfor forward */
for (m = j + 1; m <= t; m = n + 1) {
n = _scws_mget_word(s, m, t);
nweight *= wmap[m][n]->tf;
npath[x++] = n - m;
if (n > m) {
nweight *= pow(n - m, 4);
wmap[m][n]->flag |= SCWS_WORD_USED;
} else sz++;
nweight *= scws_rule_attr_ratio(s->r, attr1, wmap[m][n]->attr, &npath[x - 2]);
memcpy(attr1, wmap[m][n]->attr, 2);
}
npath[x] = 0xff;
nweight /= pow(x + sz - 1, 5);
/* draw the path for debug */
#ifdef DEBUG
if (s->mode & SCWS_DEBUG) {
fprintf(stderr, "PATH by keyword = %.*s, (weight=%.4f):\n",
s->zmap[j].end - s->zmap[i].start, s->txt + s->zmap[i].start, nweight);
for (x = 0, m = f; (n = npath[x]) != 0xff; x++) {
n += m;
fprintf(stderr, "%.*s ", s->zmap[n].end - s->zmap[m].start, s->txt + s->zmap[m].start);
m = n + 1;
}
fprintf(stderr, "\n--\n");
}
#endif
j2 = x = j;
if ((x - i) > 1) i--;
/* check better path */
if (nweight > weight) {
unsigned char *swap;
weight = nweight;
swap = mpath;
mpath = npath;
npath = swap;
}
}
/* set the result, mpath != NULL */
if (mpath == NULL)
return;
for (x = 0, m = f; (n = mpath[x]) != 0xff; x++) {
n += m;
_scws_mset_word(s, m, n);
m = n + 1;
}
/* 一口.070808: memory leak fixed. */
if (mpath) free(mpath);
if (npath) free(npath);
}
/* quick define for zrule_checker in loop */
#define ___ZRULE_CHECKER1___ \
if (j >= zlen || SCWS_NO_RULE2(wmap[j][j]->flag)) \
break;
#define ___ZRULE_CHECKER2___ \
if (j < 0 || SCWS_NO_RULE2(wmap[j][j]->flag)) \
break;
#define ___ZRULE_CHECKER3___ \
if (!scws_rule_check(s->r, r1, txt + zmap[j].start, zmap[j].end - zmap[j].start)) \
break;
static void _scws_msegment(scws_t s, int end, int zlen) {
word_t **wmap, query;
struct scws_zchar *zmap;
unsigned char *txt;
rule_item_t r1;
int i, j, k, ch, clen, start;
pool_t p;
/* pool used to management some dynamic memory */
p = pool_new();
/* create wmap & zmap */
wmap = s->wmap = (word_t **) darray_new(zlen, zlen, sizeof (word_t));
zmap = s->zmap = (struct scws_zchar *) pmalloc(p, zlen * sizeof (struct scws_zchar));
txt = s->txt;
start = s->off;
s->zis = -1;
for (i = 0; start < end; i++) {
ch = txt[start];
clen = SCWS_CHARLEN(ch);
if (clen == 1) {
while (start++ < end) {
ch = txt[start];
if (start == end || SCWS_CHARLEN(txt[start]) > 1)
break;
clen++;
}
wmap[i][i] = (word_t) pmalloc_z(p, sizeof (word_st));
wmap[i][i]->tf = 0.5;
wmap[i][i]->flag |= SCWS_ZFLAG_ENGLISH;
strcpy(wmap[i][i]->attr, SCWS_IS_ALPHA(txt[start - 1]) ? attr_en : attr_un);
} else {
query = xdict_query(s->d, txt + start, clen);
wmap[i][i] = (word_t) pmalloc(p, sizeof (word_st));
if (query == NULL) {
wmap[i][i]->tf = 0.5;
wmap[i][i]->idf = 0.0;
wmap[i][i]->flag = 0;
strcpy(wmap[i][i]->attr, attr_un);
} else {
ch = query->flag;
query->flag = SCWS_WORD_FULL;
memcpy(wmap[i][i], query, sizeof (word_st));
if (query->attr[0] == '#')
wmap[i][i]->flag |= SCWS_ZFLAG_SYMBOL;
if (ch & SCWS_WORD_MALLOCED)
free(query);
}
start += clen;
}
zmap[i].start = start - clen;
zmap[i].end = start;
}
/* fixed real zlength */
zlen = i;
/* create word query table */
for (i = 0; i < zlen; i++) {
k = 0;
for (j = i + 1; j < zlen; j++) {
query = xdict_query(s->d, txt + zmap[i].start, zmap[j].end - zmap[i].start);
if (query == NULL)
break;
ch = query->flag;
if ((ch & SCWS_WORD_FULL) && memcmp(query->attr, attr_na, 2)) {
wmap[i][j] = (word_t) pmalloc(p, sizeof (word_st));
memcpy(wmap[i][j], query, sizeof (word_st));
wmap[i][i]->flag |= SCWS_ZFLAG_WHEAD;
for (k = i + 1; k <= j; k++)
wmap[k][k]->flag |= SCWS_ZFLAG_WPART;
}
if (ch & SCWS_WORD_MALLOCED)
free(query);
if (!(ch & SCWS_WORD_PART))
break;
}
if (k--) {
/* set nr2 to some short name */
if ((k == (i + 1))) {
if (!memcmp(wmap[i][k]->attr, attr_nr, 2))
wmap[i][i]->flag |= SCWS_ZFLAG_NR2;
//if (wmap[i][k]->attr[0] == 'n')
//wmap[i][i]->flag |= SCWS_ZFLAG_N2;
}
/* clean the PART flag for the last word */
if (k < j)
wmap[i][k]->flag ^= SCWS_WORD_PART;
}
}
if (s->r == NULL)
goto do_segment;
/* auto rule set for name & zone & chinese numeric */
/* one word auto rule check */
for (i = 0; i < zlen; i++) {
if (SCWS_NO_RULE1(wmap[i][i]->flag))
continue;
r1 = scws_rule_get(s->r, txt + zmap[i].start, zmap[i].end - zmap[i].start);
if (r1 == NULL)
continue;
clen = r1->zmin > 0 ? r1->zmin : 1;
if ((r1->flag & SCWS_ZRULE_PREFIX) && (i < (zlen - clen))) {
/* prefix, check after (zmin~zmax) */
// 先检查 zmin 字内是否全部符合要求
// 再在 zmax 范围内取得符合要求的字
// int i, j, k, ch, clen, start;
for (ch = 1; ch <= clen; ch++) {
j = i + ch;
___ZRULE_CHECKER1___
___ZRULE_CHECKER3___
}
if (ch <= clen)
continue;
/* no limit znum or limit to a range */
j = i + ch;
while (1) {
if ((!r1->zmax && r1->zmin) || (r1->zmax && (clen >= r1->zmax)))
break;
___ZRULE_CHECKER1___
___ZRULE_CHECKER3___
clen++;
j++;
}
// 注意原来2字人名,识别后仍为2字的情况
if (wmap[i][i]->flag & SCWS_ZFLAG_NR2) {
if (clen == 1)
continue;
wmap[i][i + 1]->flag |= SCWS_WORD_PART;
}
/* ok, got: i & clen */
k = i + clen;
wmap[i][k] = (word_t) pmalloc(p, sizeof (word_st));
wmap[i][k]->tf = r1->tf;
wmap[i][k]->idf = r1->idf;
wmap[i][k]->flag = (SCWS_WORD_RULE | SCWS_WORD_FULL);
strncpy(wmap[i][k]->attr, r1->attr, 2);
wmap[i][i]->flag |= SCWS_ZFLAG_WHEAD;
for (j = i + 1; j <= k; j++)
wmap[j][j]->flag |= SCWS_ZFLAG_WPART;
if (!(wmap[i][i]->flag & SCWS_ZFLAG_WPART))
i = k;
continue;
}
if ((r1->flag & SCWS_ZRULE_SUFFIX) && (i >= clen)) {
/* suffix, check before */
for (ch = 1; ch <= clen; ch++) {
j = i - ch;
___ZRULE_CHECKER2___
___ZRULE_CHECKER3___
}
if (ch <= clen)
continue;
/* no limit znum or limit to a range */
j = i - ch;
while (1) {
if ((!r1->zmax && r1->zmin) || (r1->zmax && (clen >= r1->zmax)))
break;
___ZRULE_CHECKER2___
___ZRULE_CHECKER3___
clen++;
j--;
}
/* ok, got: i & clen (maybe clen=1 & [k][i] isset) */
k = i - clen;
if (wmap[k][i] != NULL)
continue;
wmap[k][i] = (word_t) pmalloc(p, sizeof (word_st));
wmap[k][i]->tf = r1->tf;
wmap[k][i]->idf = r1->idf;
wmap[k][i]->flag = SCWS_WORD_FULL;
strncpy(wmap[k][i]->attr, r1->attr, 2);
wmap[k][k]->flag |= SCWS_ZFLAG_WHEAD;
for (j = k + 1; j <= i; j++) {
wmap[j][j]->flag |= SCWS_ZFLAG_WPART;
if ((j != i) && (wmap[k][j] != NULL))
wmap[k][j]->flag |= SCWS_WORD_PART;
}
continue;
}
}
/* two words auto rule check (欧阳** , **西路) */
for (i = zlen - 2; i >= 0; i--) {
/* with value ==> must be have SCWS_WORD_FULL, so needn't check it ag. */
if ((wmap[i][i + 1] == NULL) || (wmap[i][i + 1]->flag & SCWS_WORD_PART))
continue;
k = i + 1;
r1 = scws_rule_get(s->r, txt + zmap[i].start, zmap[k].end - zmap[i].start);
if (r1 == NULL)
continue;
clen = r1->zmin > 0 ? r1->zmin : 1;
if ((r1->flag & SCWS_ZRULE_PREFIX) && (k < (zlen - clen))) {
for (ch = 1; ch <= clen; ch++) {
j = k + ch;
___ZRULE_CHECKER1___
___ZRULE_CHECKER3___
}
if (ch <= clen)
continue;
/* no limit znum or limit to a range */
j = k + ch;
while (1) {
if ((!r1->zmax && r1->zmin) || (r1->zmax && (clen >= r1->zmax)))
break;
___ZRULE_CHECKER1___
___ZRULE_CHECKER3___
clen++;
j++;
}
/* ok, got: i & clen */
k = k + clen;
wmap[i][k] = (word_t) pmalloc(p, sizeof (word_st));
wmap[i][k]->tf = r1->tf;
wmap[i][k]->idf = r1->idf;
wmap[i][k]->flag = SCWS_WORD_FULL;
strncpy(wmap[i][k]->attr, r1->attr, 2);
wmap[i][i + 1]->flag |= SCWS_WORD_PART;
for (j = i + 2; j <= k; j++)
wmap[j][j]->flag |= SCWS_ZFLAG_WPART;
i--;
continue;
}
if ((r1->flag & SCWS_ZRULE_SUFFIX) && (i >= clen)) {
/* suffix, check before */
for (ch = 1; ch <= clen; ch++) {
j = i - ch;
___ZRULE_CHECKER2___
___ZRULE_CHECKER3___
}
if (ch <= clen)
continue;
/* no limit znum or limit to a range */
j = i - ch;
while (1) {
if ((!r1->zmax && r1->zmin) || (r1->zmax && (clen >= r1->zmax)))
break;
___ZRULE_CHECKER2___
___ZRULE_CHECKER3___
clen++;
j--;
}
/* ok, got: i & clen (maybe clen=1 & [k][i] isset) */
k = i - clen;
i = i + 1;
wmap[k][i] = (word_t) pmalloc(p, sizeof (word_st));
wmap[k][i]->tf = r1->tf;
wmap[k][i]->idf = r1->idf;
wmap[k][i]->flag = SCWS_WORD_FULL;
strncpy(wmap[k][i]->attr, r1->attr, 2);
wmap[k][k]->flag |= SCWS_ZFLAG_WHEAD;
for (j = k + 1; j <= i; j++) {
wmap[j][j]->flag |= SCWS_ZFLAG_WPART;
if (wmap[k][j] != NULL)
wmap[k][j]->flag |= SCWS_WORD_PART;
}
i -= (clen + 1);
continue;
}
}
/* real do the segment */
do_segment:
/* find the easy break point */
for (i = 0, j = 0; i < zlen; i++) {
if (wmap[i][i]->flag & SCWS_ZFLAG_WPART)
continue;
if (i > j)
_scws_mseg_zone(s, j, i - 1);
j = i;
if (!(wmap[i][i]->flag & SCWS_ZFLAG_WHEAD)) {
_scws_mset_word(s, i, i);
j++;
}
}
/* the lastest zone */
if (i > j)
_scws_mseg_zone(s, j, i - 1);
/* the last single for duality */
if ((s->mode & SCWS_DUALITY) && (s->zis >= 0) && !(s->zis & SCWS_ZIS_USED)) {
i = s->zis;
SCWS_PUT_RES(s->zmap[i].start, s->wmap[i][i]->idf, (s->zmap[i].end - s->zmap[i].start), s->wmap[i][i]->attr);
}
/* free the wmap & zmap */
pool_free(p);
darray_free((void **) wmap);
}
scws_res_t scws_get_result(scws_t s) {
int off, len, ch, clen, zlen, pflag;
unsigned char *txt;
off = s->off;
len = s->len;
txt = s->txt;
s->res0 = s->res1 = NULL;
while ((off < len) && (txt[off] <= 0x20)) {