LCOV - app.info - extensions/spellcheck/hunspell/src/hunzip.cpp

LCOV - code coverage report
| Current view: | directory - extensions/spellcheck/hunspell/src - hunzip.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 129 | 0 | 0.0 %
| Date: | 2012-04-21 | Functions: | 6 | 0 | 0.0 %

           1                 : /******* BEGIN LICENSE BLOCK *******
           2                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           3                 :  *
           4                 :  * The contents of this file are subject to the Mozilla Public License Version
           5                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           6                 :  * the License. You may obtain a copy of the License at
           7                 :  * http://www.mozilla.org/MPL/
           8                 :  *
           9                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          10                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          11                 :  * for the specific language governing rights and limitations under the
          12                 :  * License.
          13                 :  *
          14                 :  * The Initial Developers of the Original Code are Kevin Hendricks (MySpell)
          15                 :  * and László Németh (Hunspell). Portions created by the Initial Developers
          16                 :  * are Copyright (C) 2002-2005 the Initial Developers. All Rights Reserved.
          17                 :  *
          18                 :  * Contributor(s): László Németh (nemethl@gyorsposta.hu)
          19                 :  *                 Caolan McNamara (caolanm@redhat.com)
          20                 :  *
          21                 :  * Alternatively, the contents of this file may be used under the terms of
          22                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
          23                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          24                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          25                 :  * of those above. If you wish to allow use of your version of this file only
          26                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          27                 :  * use your version of this file under the terms of the MPL, indicate your
          28                 :  * decision by deleting the provisions above and replace them with the notice
          29                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          30                 :  * the provisions above, a recipient may use your version of this file under
          31                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          32                 :  *
          33                 :  ******* END LICENSE BLOCK *******/
          34                 :
          35                 : #include <stdlib.h>
          36                 : #include <string.h>
          37                 : #include <stdio.h>
          38                 :
          39                 : #include "hunzip.hxx"
          40                 :
          41                 : #define CODELEN  65536
          42                 : #define BASEBITREC 5000
          43                 :
          44                 : #define UNCOMPRESSED '\002'
          45                 : #define MAGIC "hz0"
          46                 : #define MAGIC_ENCRYPT "hz1"
          47                 : #define MAGICLEN (sizeof(MAGIC) - 1)
          48                 :
          49               0 : int Hunzip::fail(const char * err, const char * par) {
          50               0 :     fprintf(stderr, err, par);
          51               0 :     return -1;
          52                 : }
          53                 :
          54               0 : Hunzip::Hunzip(const char * file, const char * key) {
          55               0 :     bufsiz = 0;
          56               0 :     lastbit = 0;
          57               0 :     inc = 0;
          58               0 :     outc = 0;
          59               0 :     dec = NULL;
          60               0 :     fin = NULL;
          61               0 :     filename = (char *) malloc(strlen(file) + 1);
          62               0 :     if (filename) strcpy(filename, file);
          63               0 :     if (getcode(key) == -1) bufsiz = -1;
          64               0 :     else bufsiz = getbuf();
          65               0 : }
          66                 :
          67               0 : int Hunzip::getcode(const char * key) {
          68                 :     unsigned char c[2];
          69                 :     int i, j, n, p;
          70               0 :     int allocatedbit = BASEBITREC;
          71               0 :     const char * enc = key;
          72                 :
          73               0 :     if (!filename) return -1;
          74                 :
          75               0 :     fin = fopen(filename, "rb");
          76               0 :     if (!fin) return -1;
          77                 :
          78                 :     // read magic number
          79               0 :     if ((fread(in, 1, 3, fin) < MAGICLEN)
          80               0 :         || !(strncmp(MAGIC, in, MAGICLEN) == 0 ||
          81               0 :                 strncmp(MAGIC_ENCRYPT, in, MAGICLEN) == 0)) {
          82               0 :             return fail(MSG_FORMAT, filename);
          83                 :     }
          84                 :
          85                 :     // check encryption
          86               0 :     if (strncmp(MAGIC_ENCRYPT, in, MAGICLEN) == 0) {
          87                 :         unsigned char cs;
          88               0 :         if (!key) return fail(MSG_KEY, filename);
          89               0 :         if (fread(&c, 1, 1, fin) < 1) return fail(MSG_FORMAT, filename);
          90               0 :         for (cs = 0; *enc; enc++) cs ^= *enc;
          91               0 :         if (cs != c[0]) return fail(MSG_KEY, filename);
          92               0 :         enc = key;
          93               0 :     } else key = NULL;
          94                 :
          95                 :     // read record count
          96               0 :     if (fread(&c, 1, 2, fin) < 2) return fail(MSG_FORMAT, filename);
          97                 :
          98               0 :     if (key) {
          99               0 :         c[0] ^= *enc;
         100               0 :         if (*(++enc) == '\0') enc = key;
         101               0 :         c[1] ^= *enc;
         102                 :     }
         103                 :
         104               0 :     n = ((int) c[0] << 8) + c[1];
         105               0 :     dec = (struct bit *) malloc(BASEBITREC * sizeof(struct bit));
         106               0 :     if (!dec) return fail(MSG_MEMORY, filename);
         107               0 :     dec[0].v[0] = 0;
         108               0 :     dec[0].v[1] = 0;
         109                 :
         110                 :     // read codes
         111               0 :     for (i = 0; i < n; i++) {
         112                 :         unsigned char l;
         113               0 :         if (fread(c, 1, 2, fin) < 2) return fail(MSG_FORMAT, filename);
         114               0 :         if (key) {
         115               0 :             if (*(++enc) == '\0') enc = key;
         116               0 :             c[0] ^= *enc;
         117               0 :             if (*(++enc) == '\0') enc = key;
         118               0 :             c[1] ^= *enc;
         119                 :         }
         120               0 :         if (fread(&l, 1, 1, fin) < 1) return fail(MSG_FORMAT, filename);
         121               0 :         if (key) {
         122               0 :             if (*(++enc) == '\0') enc = key;
         123               0 :             l ^= *enc;
         124                 :         }
         125               0 :         if (fread(in, 1, l/8+1, fin) < (size_t) l/8+1) return fail(MSG_FORMAT, filename);
         126               0 :         if (key) for (j = 0; j <= l/8; j++) {
         127               0 :             if (*(++enc) == '\0') enc = key;
         128               0 :             in[j] ^= *enc;
         129                 :         }
         130               0 :         p = 0;
         131               0 :         for (j = 0; j < l; j++) {
         132               0 :             int b = (in[j/8] & (1 << (7 - (j % 8)))) ? 1 : 0;
         133               0 :             int oldp = p;
         134               0 :             p = dec[p].v[b];
         135               0 :             if (p == 0) {
         136               0 :                 lastbit++;
         137               0 :                 if (lastbit == allocatedbit) {
         138               0 :                     allocatedbit += BASEBITREC;
         139               0 :                     dec = (struct bit *) realloc(dec, allocatedbit * sizeof(struct bit));
         140                 :                 }
         141               0 :                 dec[lastbit].v[0] = 0;
         142               0 :                 dec[lastbit].v[1] = 0;
         143               0 :                 dec[oldp].v[b] = lastbit;
         144               0 :                 p = lastbit;
         145                 :             }
         146                 :         }
         147               0 :         dec[p].c[0] = c[0];
         148               0 :         dec[p].c[1] = c[1];
         149                 :     }
         150               0 :     return 0;
         151                 : }
         152                 :
         153               0 : Hunzip::~Hunzip()
         154                 : {
         155               0 :     if (dec) free(dec);
         156               0 :     if (fin) fclose(fin);
         157               0 :     if (filename) free(filename);
         158               0 : }
         159                 :
         160               0 : int Hunzip::getbuf() {
         161               0 :     int p = 0;
         162               0 :     int o = 0;
         163               0 :     do {
         164               0 :         if (inc == 0) inbits = fread(in, 1, BUFSIZE, fin) * 8;
         165               0 :         for (; inc < inbits; inc++) {
         166               0 :             int b = (in[inc / 8] & (1 << (7 - (inc % 8)))) ? 1 : 0;
         167               0 :             int oldp = p;
         168               0 :             p = dec[p].v[b];
         169               0 :             if (p == 0) {
         170               0 :                 if (oldp == lastbit) {
         171               0 :                     fclose(fin);
         172               0 :                     fin = NULL;
         173                 :                     // add last odd byte
         174               0 :                     if (dec[lastbit].c[0]) out[o++]  = dec[lastbit].c[1];
         175               0 :                     return o;
         176                 :                 }
         177               0 :                 out[o++] = dec[oldp].c[0];
         178               0 :                 out[o++] = dec[oldp].c[1];
         179               0 :                 if (o == BUFSIZE) return o;
         180               0 :                 p = dec[p].v[b];
         181                 :             }
         182                 :         }
         183               0 :         inc = 0;
         184                 :     } while (inbits == BUFSIZE * 8);
         185               0 :     return fail(MSG_FORMAT, filename);
         186                 : }
         187                 :
         188               0 : const char * Hunzip::getline() {
         189                 :     char linebuf[BUFSIZE];
         190               0 :     int l = 0, eol = 0, left = 0, right = 0;
         191               0 :     if (bufsiz == -1) return NULL;
         192               0 :     while (l < bufsiz && !eol) {
         193               0 :         linebuf[l++] = out[outc];
         194               0 :         switch (out[outc]) {
         195               0 :             case '\t': break;
         196                 :             case 31: { // escape
         197               0 :                 if (++outc == bufsiz) {
         198               0 :                     bufsiz = getbuf();
         199               0 :                     outc = 0;
         200                 :                 }
         201               0 :                 linebuf[l - 1] = out[outc];
         202               0 :                 break;
         203                 :             }
         204               0 :             case ' ': break;
         205               0 :             default: if (((unsigned char) out[outc]) < 47) {
         206               0 :                 if (out[outc] > 32) {
         207               0 :                     right = out[outc] - 31;
         208               0 :                     if (++outc == bufsiz) {
         209               0 :                         bufsiz = getbuf();
         210               0 :                         outc = 0;
         211                 :                     }
         212                 :                 }
         213               0 :                 if (out[outc] == 30) left = 9; else left = out[outc];
         214               0 :                 linebuf[l-1] = '\n';
         215               0 :                 eol = 1;
         216                 :             }
         217                 :         }
         218               0 :         if (++outc == bufsiz) {
         219               0 :             outc = 0;
         220               0 :             bufsiz = fin ? getbuf(): -1;
         221                 :         }
         222                 :     }
         223               0 :     if (right) strcpy(linebuf + l - 1, line + strlen(line) - right - 1);
         224               0 :     else linebuf[l] = '\0';
         225               0 :     strcpy(line + left, linebuf);
         226               0 :     return line;
         227                 : }

Generated by: LCOV version 1.7