X-Git-Url: http://git.indexdata.com/?p=idzebra-moved-to-github.git;a=blobdiff_plain;f=dict%2Finsert.c;h=506fe1726b656fd5100f0c7e4ad5510600863226;hp=3106f094d37c2213147750e18f37814e54cf19ae;hb=8a0144a3925311102133d62ac6258ace8d7187eb;hpb=f9c29149e90d3710b0d6f2d6a7a4cffcba401fe6 diff --git a/dict/insert.c b/dict/insert.c index 3106f09..506fe17 100644 --- a/dict/insert.c +++ b/dict/insert.c @@ -1,85 +1,94 @@ -/* - * Copyright (C) 1994, Index Data I/S - * All rights reserved. - * Sebastian Hammer, Adam Dickmeiss - * - * $Log: insert.c,v $ - * Revision 1.4 1994-09-01 17:44:09 adam - * depend include change. - * CVS ---------------------------------------------------------------------- - * - * Revision 1.3 1994/08/18 12:40:56 adam - * Some development of dictionary. Not finished at all! - * - * Revision 1.2 1994/08/17 13:32:19 adam - * Use cache in dict - not in bfile. - * - * Revision 1.1 1994/08/16 16:26:48 adam - * Added dict. - * - */ +/* This file is part of the Zebra server. + Copyright (C) Index Data + +Zebra is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 2, or (at your option) any later +version. + +Zebra is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +*/ + + +#if HAVE_CONFIG_H +#include +#endif #include #include #include #include -#include +#include "dict-p.h" -static int dict_ins (Dict dict, const Dict_char *str, - Dict_ptr back_ptr, int userlen, void *userinfo); +#define CHECK 0 +static int dict_ins(Dict dict, const Dict_char *str, + Dict_ptr back_ptr, int userlen, void *userinfo); +static void clean_page(Dict dict, Dict_ptr ptr, void *p, Dict_char *out, + Dict_ptr subptr, char *userinfo); -static Dict_ptr new_page (Dict dict, Dict_ptr back_ptr, void **pp) + +static Dict_ptr new_page(Dict dict, Dict_ptr back_ptr, void **pp) { void *p; - Dict_ptr ptr = dict->head.free_list; - if (dict->head.free_list == dict->head.last) + Dict_ptr ptr = dict->head.last; + if (!dict->head.freelist) { - dict->head.free_list++; - dict->head.last = dict->head.free_list; - dict_bf_newp (dict->dbf, ptr, &p); + dict_bf_newp(dict->dbf, dict->head.last, &p, dict->head.page_size); + (dict->head.last)++; } else { - dict_bf_readp (dict->dbf, dict->head.free_list, &p); - dict->head.free_list = DICT_nextptr(p); - if (dict->head.free_list == 0) - dict->head.free_list = dict->head.last; + ptr = dict->head.freelist; + dict_bf_readp(dict->dbf, ptr, &p); + dict->head.freelist = DICT_backptr(p); } - assert (p); + assert(p); DICT_type(p) = 0; DICT_backptr(p) = back_ptr; - DICT_nextptr(p) = 0; DICT_nodir(p) = 0; DICT_size(p) = DICT_infoffset; - *pp = p; + DICT_bsize(p) = dict->head.page_size; + if (pp) + *pp = p; return ptr; } -static int split_page (Dict dict, Dict_ptr ptr, void *p) +static int split_page(Dict dict, Dict_ptr ptr, void *p) { void *subp; char *info_here; Dict_ptr subptr; - int i, need; - short *indxp, *best_indxp; - Dict_char best_char; - Dict_char prev_char; - int best_no = -1, no_current; - - indxp = (short*) ((char*) p+DICT_PAGESIZE-sizeof(short)); - for (i = DICT_nodir (p); --i >= 0; --indxp) + int i, j; + short *indxp, *best_indxp = NULL; + Dict_char best_char = 0; + Dict_char prev_char = 0; + int best_no = -1, no_current = 1; + + dict->no_split++; + /* determine splitting char... */ + indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short)); + for (i = DICT_nodir(p); --i >= 0; --indxp) { if (*indxp > 0) /* tail string here! */ { Dict_char dc; - memcpy (&dc, (char*) p + *indxp, sizeof(dc)); + memcpy(&dc, (char*) p + *indxp, sizeof(dc)); if (best_no < 0) { /* first entry met */ best_char = prev_char = dc; - no_current = best_no = 1; + best_no = 1; + best_indxp = indxp; } else if (prev_char == dc) { /* same char prefix. update */ @@ -90,117 +99,64 @@ static int split_page (Dict dict, Dict_ptr ptr, void *p) best_indxp = indxp; } } - else + else { /* new char prefix. restore */ prev_char = dc; no_current = 1; } } } - if (best_no < 0) /* we didn't find any tail string entry at all! */ - return -1; + assert(best_no >= 0); /* we didn't find any tail string entry at all! */ - subptr = new_page (dict, ptr, &subp); + j = best_indxp - (short*) p; + subptr = new_page(dict, ptr, &subp); /* scan entries to see if there is a string with */ /* length 1. info_here indicates if such entry exist */ info_here = NULL; - for (indxp=best_indxp, i=0; i 0); - - info = (char*) p + *indxp; /* entry start */ - slen = dict_strlen(info); - - assert (slen > 0); - if (slen == 1) - { - assert (!info_here); - info_here = info+(slen+1)*sizeof(Dict_char); - } - } - /* calculate the amount of bytes needed for this entry when */ - /* transformed to a sub entry */ - need = sizeof(Dict_char)+sizeof(Dict_ptr)+1; - if (info_here) - need += *info_here; - - indxp = best_indxp; - /* now loop on all entries with string length > 1 i.e. all */ - /* those entries which contribute to a sub page */ - best_indxp = NULL; - for (i=0; i 0); - - info = (char*) p + *indxp; /* entry start */ - slen = dict_strlen(info); - - if (slen > 1) - { - info1 = info+(1+slen)*sizeof(Dict_char); /* info start */ - - if (need <= (1+slen)*sizeof(Dict_char) + 1 + *info1) - best_indxp = indxp; /* space for entry */ - dict_ins (dict, info+sizeof(Dict_char), subptr, *info1, info1+1); - } - } - if (best_indxp) - { /* there was a hole big enough for a sub entry */ - char *info = (char*) p + *best_indxp; - short *indxp1; + info = (char*) p + ((short*) p)[j]; + /* entry start */ + memcpy(&dc, info, sizeof(dc)); + assert(dc == best_char); + slen = 1+dict_strlen((Dict_char*) info); - *--indxp = - *best_indxp; - DICT_type(p) = 1; - DICT_nodir (p) -= (best_no-1); - indxp1 = (short*)((char*)p+DICT_PAGESIZE-DICT_nodir(p)*sizeof(short)); - while (indxp != indxp1) + assert(slen > 1); + if (slen == 2) { - --indxp; - *indxp = indxp[1-best_no]; + assert(!info_here); + info_here = info+slen*sizeof(Dict_char); } - memcpy (info, &subptr, sizeof(Dict_ptr)); /* store subptr */ - info += sizeof(Dict_ptr); - memcpy (info, &best_char, sizeof(Dict_char)); /* store sub char */ - info += sizeof(Dict_char); - if (info_here) - memcpy (info, info_here, *info_here+1); /* with information */ else - *info = 0; /* without info */ - } - else - { - short *indxp1, *indxp2; - assert (0); - DICT_type(p) = 1; - DICT_nodir(p) -= best_no; - indxp2 = indxp; - indxp1 = (short*)((char*) p+DICT_PAGESIZE-DICT_nodir(p)*sizeof(short)); - do { - --indxp2; - indxp2[0] = indxp2[-best_no]; - } while (indxp2 != indxp1); + info1 = info+slen*sizeof(Dict_char); /* info start */ + dict_ins(dict, (Dict_char*) (info+sizeof(Dict_char)), + subptr, *info1, info1+1); + dict_bf_readp(dict->dbf, ptr, &p); + } } + /* now clean the page ... */ + clean_page(dict, ptr, p, &best_char, subptr, info_here); return 0; } -static void clean_page (Dict dict, void *p) +static void clean_page(Dict dict, Dict_ptr ptr, void *p, Dict_char *out, + Dict_ptr subptr, char *userinfo) { - char *np = xmalloc (dict->head.page_size); - int i, slen; + char *np = (char *) xmalloc(dict->head.page_size); + int i, slen, no = 0; short *indxp1, *indxp2; char *info1, *info2; - indxp1 = (short*) ((char*) p+DICT_PAGESIZE-sizeof(short)); - indxp2 = (short*) ((char*) np+DICT_PAGESIZE); + DICT_bsize(np) = dict->head.page_size; + indxp1 = (short*) ((char*) p+DICT_bsize(p)-sizeof(short)); + indxp2 = (short*) ((char*) np+DICT_bsize(np)); info2 = (char*) np + DICT_infoffset; - for (i = DICT_nodir (p); --i >= 0; --indxp1) + for (i = DICT_nodir(p); --i >= 0; --indxp1) { if (*indxp1 > 0) /* tail string here! */ { @@ -208,16 +164,32 @@ static void clean_page (Dict dict, void *p) /* unsigned char length of information */ /* char * information */ - *--indxp2 = info2 - np; info1 = (char*) p + *indxp1; - slen = (dict_strlen(info1)+1)*sizeof(Dict_char); - memcpy (info2, info1, slen); - info2 += slen; - info1 += slen; - slen = *info1+1; - memcpy (info2, info1, slen); + if (out && memcmp(out, info1, sizeof(Dict_char)) == 0) + { + if (subptr == 0) + continue; + *--indxp2 = -(info2 - np); + memcpy(info2, &subptr, sizeof(Dict_ptr)); + info2 += sizeof(Dict_ptr); + memcpy(info2, out, sizeof(Dict_char)); + info2 += sizeof(Dict_char); + if (userinfo) + { + memcpy(info2, userinfo, *userinfo+1); + info2 += *userinfo + 1; + } + else + *info2++ = 0; + subptr = 0; + ++no; + continue; + } + *--indxp2 = info2 - np; + slen = (dict_strlen((Dict_char*) info1)+1)*sizeof(Dict_char); + memcpy(info2, info1, slen); + info1 += slen; info2 += slen; - info1 += slen; } else { @@ -226,184 +198,265 @@ static void clean_page (Dict dict, void *p) /* unsigned char length of information */ /* char * information */ + assert(*indxp1 < 0); *--indxp2 = -(info2 - np); info1 = (char*) p - *indxp1; - memcpy (info2, info1, sizeof(Dict_ptr)+sizeof(Dict_char)); + memcpy(info2, info1, sizeof(Dict_ptr)+sizeof(Dict_char)); + info1 += sizeof(Dict_ptr)+sizeof(Dict_char); info2 += sizeof(Dict_ptr)+sizeof(Dict_char); - info1 += sizeof(Dict_ptr)+sizeof(Dict_char); - slen = *info1+1; - memcpy (info2, info1, slen); - info2 += slen; - info1 += slen; } + slen = *info1+1; + memcpy(info2, info1, slen); + info2 += slen; + ++no; } - memcpy ((char*) p + DICT_infoffset, (char*) np + DICT_infoffset, - DICT_PAGESIZE-DICT_infoffset); +#if 1 + memcpy((char*)p+DICT_infoffset, + (char*)np+DICT_infoffset, + info2 - ((char*)np+DICT_infoffset)); + memcpy((char*)p + ((char*)indxp2 - (char*)np), + indxp2, + ((char*) np+DICT_bsize(p)) - (char*)indxp2); +#else + memcpy((char*)p+DICT_infoffset, (char*)np+DICT_infoffset, + DICT_pagesize(dict)-DICT_infoffset); +#endif DICT_size(p) = info2 - np; DICT_type(p) = 0; - xfree (np); + DICT_nodir(p) = no; + xfree(np); + dict_bf_touch(dict->dbf, ptr); } -static int dict_ins (Dict dict, const Dict_char *str, - Dict_ptr back_ptr, int userlen, void *userinfo) + + +/* return 0 if new */ +/* return 1 if before but change of info */ +/* return 2 if same as before */ + +static int dict_ins(Dict dict, const Dict_char *str, + Dict_ptr ptr, int userlen, void *userinfo) { - int i, slen, cmp = 1; - Dict_ptr ptr = back_ptr; + int hi, lo, mid, slen, cmp = 1; short *indxp; char *info; void *p; - if (ptr == 0) - ptr = new_page (dict, back_ptr, &p); - else - dict_bf_readp (dict->dbf, ptr, &p); - - assert (p); - assert (ptr); + dict_bf_readp(dict->dbf, ptr, &p); + + assert(p); + assert(ptr); - indxp = (short*) ((char*) p+DICT_PAGESIZE-sizeof(short)); - for (i = DICT_nodir (p); --i >= 0; --indxp) + mid = lo = 0; + hi = DICT_nodir(p)-1; + indxp = (short*) ((char*) p+DICT_bsize(p)-sizeof(short)); + while (lo <= hi) { - if (*indxp > 0) /* tail string here! */ + mid = (lo+hi)/2; + if (indxp[-mid] > 0) { - info = (char*) p + *indxp; /* string (Dict_char *) DICT_EOS terminated */ /* unsigned char length of information */ /* char * information */ - cmp = dict_strcmp ((Dict_char*) info, str); + info = (char*)p + indxp[-mid]; + cmp = dict_strcmp((Dict_char*) info, str); if (!cmp) { - info += (dict_strlen(info)+1)*sizeof(Dict_char); + info += (dict_strlen((Dict_char*) info)+1)*sizeof(Dict_char); /* consider change of userinfo length... */ if (*info == userlen) { - if (memcmp (info+1, userinfo, userlen)) + /* change of userinfo ? */ + if (memcmp(info+1, userinfo, userlen)) { - dict_bf_touch (dict->dbf, ptr); - memcpy (info+1, userinfo, userlen); + dict_bf_touch(dict->dbf, ptr); + memcpy(info+1, userinfo, userlen); + return 1; } + /* same userinfo */ + return 2; } else if (*info > userlen) { + /* room for new userinfo */ DICT_type(p) = 1; *info = userlen; - dict_bf_touch (dict->dbf, ptr); - memcpy (info+1, userinfo, userlen); - } - else - { - DICT_type(p) = 1; - break; + dict_bf_touch(dict->dbf, ptr); + memcpy(info+1, userinfo, userlen); + return 1; } - return 0; - } - else if(cmp > 0) break; + } } - else /* tail of string in sub page */ + else { Dict_char dc; - assert (*indxp < 0); - info = (char*) p - *indxp; + Dict_ptr subptr; + /* Dict_ptr subptr */ /* Dict_char sub char */ /* unsigned char length of information */ /* char * information */ - memcpy (&dc, info+sizeof(Dict_ptr), sizeof(Dict_char)); + info = (char*)p - indxp[-mid]; + memcpy(&dc, info+sizeof(Dict_ptr), sizeof(Dict_char)); cmp = dc- *str; if (!cmp) { - Dict_ptr subptr; - void *pp; + memcpy(&subptr, info, sizeof(Dict_ptr)); if (*++str == DICT_EOS) - { /* missing: consider change of userinfo length ... */ - if (memcmp (info+sizeof(Dict_char)+sizeof(Dict_ptr)+1, - userinfo, userlen)) + { + /* finish of string. Store userinfo here... */ + + int xlen = info[sizeof(Dict_ptr)+sizeof(Dict_char)]; + if (xlen == userlen) + { + if (memcmp(info+sizeof(Dict_ptr)+sizeof(Dict_char)+1, + userinfo, userlen)) + { + dict_bf_touch(dict->dbf, ptr); + memcpy(info+sizeof(Dict_ptr)+sizeof(Dict_char)+1, + userinfo, userlen); + return 1; + } + return 2; + } + else if (xlen > userlen) { - memcpy (dict+sizeof(Dict_char)+sizeof(Dict_ptr)+1, - userinfo, userlen); - dict_bf_touch (dict->dbf, ptr); + DICT_type(p) = 1; + info[sizeof(Dict_ptr)+sizeof(Dict_char)] = userlen; + memcpy(info+sizeof(Dict_ptr)+sizeof(Dict_char)+1, + userinfo, userlen); + dict_bf_touch(dict->dbf, ptr); + return 1; } + /* xlen < userlen, expanding needed ... */ + if (DICT_size(p)+sizeof(Dict_char)+sizeof(Dict_ptr)+ + userlen >= + DICT_bsize(p) - (1+DICT_nodir(p))*sizeof(short)) + { + /* not enough room - split needed ... */ + if (DICT_type(p) == 1) + { + clean_page(dict, ptr, p, NULL, 0, NULL); + return dict_ins(dict, str-1, ptr, + userlen, userinfo); + } + if (split_page(dict, ptr, p)) + { + yaz_log(YLOG_FATAL, "Unable to split page %d\n", ptr); + assert(0); + } + return dict_ins(dict, str-1, ptr, userlen, userinfo); + } + else + { /* enough room - no split needed ... */ + info = (char*)p + DICT_size(p); + memcpy(info, &subptr, sizeof(subptr)); + memcpy(info+sizeof(Dict_ptr), &dc, sizeof(Dict_char)); + info[sizeof(Dict_char)+sizeof(Dict_ptr)] = userlen; + memcpy(info+sizeof(Dict_char)+sizeof(Dict_ptr)+1, + userinfo, userlen); + indxp[-mid] = -DICT_size(p); + DICT_size(p) += sizeof(Dict_char)+sizeof(Dict_ptr) + +1+userlen; + DICT_type(p) = 1; + dict_bf_touch(dict->dbf, ptr); + } + if (xlen) + return 1; return 0; } else { - memcpy (&subptr, info, sizeof(subptr)); if (subptr == 0) { - subptr = new_page (dict, ptr, &pp); - memcpy (info, &subptr, sizeof(subptr)); - dict_bf_touch (dict->dbf, ptr); + subptr = new_page(dict, ptr, NULL); + memcpy(info, &subptr, sizeof(subptr)); + dict_bf_touch(dict->dbf, ptr); } - return dict_ins (dict, str, ptr, userlen, userinfo); + return dict_ins(dict, str, subptr, userlen, userinfo); } } - else if(cmp > 0) - break; } + if (cmp < 0) + lo = mid+1; + else + hi = mid-1; } + indxp = indxp-mid; + if (lo>hi && cmp < 0) + --indxp; slen = (dict_strlen(str)+1)*sizeof(Dict_char); if (DICT_size(p)+slen+userlen >= - DICT_PAGESIZE - (1+DICT_nodir(p))*sizeof(short)) /* overflow? */ + (int)(DICT_bsize(p) - (1+DICT_nodir(p))*sizeof(short)))/* overflow? */ { - if (DICT_type(p) == 1) + if (DICT_type(p)) { - clean_page (dict, p); - dict_ins (dict, str, ptr, userlen, userinfo); - return 0; + clean_page(dict, ptr, p, NULL, 0, NULL); + return dict_ins(dict, str, ptr, userlen, userinfo); } - i = 0; - do - { - if (i > 0) - assert (0); - if (split_page (dict, ptr, p)) - { - log (LOG_FATAL, "Unable to split page %d\n", ptr); - abort (); - } - if (DICT_size(p)+slen+userlen < - DICT_PAGESIZE - (1+DICT_nodir(p))*sizeof(short)) - break; - i++; - clean_page (dict, p); - } while (DICT_size(p)+slen+userlen > DICT_PAGESIZE - - (1+DICT_nodir(p))*sizeof(short)); - dict_ins (dict, str, ptr, userlen, userinfo); - return 0; + split_page(dict, ptr, p); + return dict_ins(dict, str, ptr, userlen, userinfo); } if (cmp) { short *indxp1; (DICT_nodir(p))++; - indxp1 = (short*)((char*) p + DICT_PAGESIZE + indxp1 = (short*)((char*) p + DICT_bsize(p) - DICT_nodir(p)*sizeof(short)); for (; indxp1 != indxp; indxp1++) indxp1[0] = indxp1[1]; +#if CHECK + indxp1 = (short*) ((char*) p+DICT_pagesize(dict)-sizeof(short)); + for (i = DICT_nodir (p); --i >= 0; --indxp1) + { + if (*indxp1 < 0) + { + info = (char*)p - *indxp1; + assert (info[sizeof(Dict_ptr)] > ' '); + } + } +#endif } + else + DICT_type(p) = 1; info = (char*)p + DICT_size(p); - memcpy (info, str, slen); + memcpy(info, str, slen); info += slen; *info++ = userlen; - memcpy (info, userinfo, userlen); + memcpy(info, userinfo, userlen); info += userlen; *indxp = DICT_size(p); -#if 0 - printf ("indxp[%d]\n", (char*) indxp - (char*) p); -#endif - DICT_size(p) = info- (char*) p; - dict_bf_touch (dict->dbf, ptr); - return 0; + dict_bf_touch(dict->dbf, ptr); + if (cmp) + return 0; + return 1; } -int dict_insert (Dict dict, const Dict_char *str, int userlen, void *userinfo) +int dict_insert(Dict dict, const char *str, int userlen, void *userinfo) { - assert (dict->head.last > 0); - if (dict->head.last == 1) - dict_ins (dict, str, 0, userlen, userinfo); - else - dict_ins (dict, str, 1, userlen, userinfo); - return 0; + if (!dict->rw) + return -1; + dict->no_insert++; + if (!dict->head.root) + { + void *p; + dict->head.root = new_page(dict, 0, &p); + if (!dict->head.root) + return -1; + } + return dict_ins(dict, (const Dict_char *) str, dict->head.root, + userlen, userinfo); } + +/* + * Local variables: + * c-basic-offset: 4 + * c-file-style: "Stroustrup" + * indent-tabs-mode: nil + * End: + * vim: shiftwidth=4 tabstop=8 expandtab + */ +