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Diffstat (limited to 'libs/hunspell/src/hunzip.cxx')
-rw-r--r--libs/hunspell/src/hunzip.cxx256
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diff --git a/libs/hunspell/src/hunzip.cxx b/libs/hunspell/src/hunzip.cxx
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+++ b/libs/hunspell/src/hunzip.cxx
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * Copyright (C) 2002-2017 Németh László
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * Hunspell is based on MySpell which is Copyright (C) 2002 Kevin Hendricks.
+ *
+ * Contributor(s): David Einstein, Davide Prina, Giuseppe Modugno,
+ * Gianluca Turconi, Simon Brouwer, Noll János, Bíró Árpád,
+ * Goldman Eleonóra, Sarlós Tamás, Bencsáth Boldizsár, Halácsy Péter,
+ * Dvornik László, Gefferth András, Nagy Viktor, Varga Dániel, Chris Halls,
+ * Rene Engelhard, Bram Moolenaar, Dafydd Jones, Harri Pitkänen
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "hunzip.hxx"
+#include "csutil.hxx"
+
+#define CODELEN 65536
+#define BASEBITREC 5000
+
+#define UNCOMPRESSED '\002'
+#define MAGIC "hz0"
+#define MAGIC_ENCRYPT "hz1"
+#define MAGICLEN (sizeof(MAGIC) - 1)
+
+int Hunzip::fail(const char* err, const char* par) {
+ fprintf(stderr, err, par);
+ return -1;
+}
+
+Hunzip::Hunzip(const char* file, const char* key)
+ : bufsiz(0), lastbit(0), inc(0), inbits(0), outc(0) {
+ in[0] = out[0] = line[0] = '\0';
+ filename = mystrdup(file);
+ if (getcode(key) == -1)
+ bufsiz = -1;
+ else
+ bufsiz = getbuf();
+}
+
+int Hunzip::getcode(const char* key) {
+ unsigned char c[2];
+ int i, j, n;
+ int allocatedbit = BASEBITREC;
+ const char* enc = key;
+
+ if (!filename)
+ return -1;
+
+ myopen(fin, filename, std::ios_base::in | std::ios_base::binary);
+ if (!fin.is_open())
+ return -1;
+
+ // read magic number
+ if (!fin.read(in, 3) ||
+ !(strncmp(MAGIC, in, MAGICLEN) == 0 ||
+ strncmp(MAGIC_ENCRYPT, in, MAGICLEN) == 0)) {
+ return fail(MSG_FORMAT, filename);
+ }
+
+ // check encryption
+ if (strncmp(MAGIC_ENCRYPT, in, MAGICLEN) == 0) {
+ unsigned char cs;
+ if (!key)
+ return fail(MSG_KEY, filename);
+ if (!fin.read(reinterpret_cast<char*>(c), 1))
+ return fail(MSG_FORMAT, filename);
+ for (cs = 0; *enc; enc++)
+ cs ^= *enc;
+ if (cs != c[0])
+ return fail(MSG_KEY, filename);
+ enc = key;
+ } else
+ key = NULL;
+
+ // read record count
+ if (!fin.read(reinterpret_cast<char*>(c), 2))
+ return fail(MSG_FORMAT, filename);
+
+ if (key) {
+ c[0] ^= *enc;
+ if (*(++enc) == '\0')
+ enc = key;
+ c[1] ^= *enc;
+ }
+
+ n = ((int)c[0] << 8) + c[1];
+ dec.resize(BASEBITREC);
+ dec[0].v[0] = 0;
+ dec[0].v[1] = 0;
+
+ // read codes
+ for (i = 0; i < n; i++) {
+ unsigned char l;
+ if (!fin.read(reinterpret_cast<char*>(c), 2))
+ return fail(MSG_FORMAT, filename);
+ if (key) {
+ if (*(++enc) == '\0')
+ enc = key;
+ c[0] ^= *enc;
+ if (*(++enc) == '\0')
+ enc = key;
+ c[1] ^= *enc;
+ }
+ if (!fin.read(reinterpret_cast<char*>(&l), 1))
+ return fail(MSG_FORMAT, filename);
+ if (key) {
+ if (*(++enc) == '\0')
+ enc = key;
+ l ^= *enc;
+ }
+ if (!fin.read(in, l / 8 + 1))
+ return fail(MSG_FORMAT, filename);
+ if (key)
+ for (j = 0; j <= l / 8; j++) {
+ if (*(++enc) == '\0')
+ enc = key;
+ in[j] ^= *enc;
+ }
+ int p = 0;
+ for (j = 0; j < l; j++) {
+ int b = (in[j / 8] & (1 << (7 - (j % 8)))) ? 1 : 0;
+ int oldp = p;
+ p = dec[p].v[b];
+ if (p == 0) {
+ lastbit++;
+ if (lastbit == allocatedbit) {
+ allocatedbit += BASEBITREC;
+ dec.resize(allocatedbit);
+ }
+ dec[lastbit].v[0] = 0;
+ dec[lastbit].v[1] = 0;
+ dec[oldp].v[b] = lastbit;
+ p = lastbit;
+ }
+ }
+ dec[p].c[0] = c[0];
+ dec[p].c[1] = c[1];
+ }
+ return 0;
+}
+
+Hunzip::~Hunzip() {
+ if (filename)
+ free(filename);
+}
+
+int Hunzip::getbuf() {
+ int p = 0;
+ int o = 0;
+ do {
+ if (inc == 0) {
+ fin.read(in, BUFSIZE);
+ inbits = fin.gcount() * 8;
+ }
+ for (; inc < inbits; inc++) {
+ int b = (in[inc / 8] & (1 << (7 - (inc % 8)))) ? 1 : 0;
+ int oldp = p;
+ p = dec[p].v[b];
+ if (p == 0) {
+ if (oldp == lastbit) {
+ fin.close();
+ // add last odd byte
+ if (dec[lastbit].c[0])
+ out[o++] = dec[lastbit].c[1];
+ return o;
+ }
+ out[o++] = dec[oldp].c[0];
+ out[o++] = dec[oldp].c[1];
+ if (o == BUFSIZE)
+ return o;
+ p = dec[p].v[b];
+ }
+ }
+ inc = 0;
+ } while (inbits == BUFSIZE * 8);
+ return fail(MSG_FORMAT, filename);
+}
+
+bool Hunzip::getline(std::string& dest) {
+ char linebuf[BUFSIZE];
+ int l = 0, eol = 0, left = 0, right = 0;
+ if (bufsiz == -1)
+ return false;
+ while (l < bufsiz && !eol) {
+ linebuf[l++] = out[outc];
+ switch (out[outc]) {
+ case '\t':
+ break;
+ case 31: { // escape
+ if (++outc == bufsiz) {
+ bufsiz = getbuf();
+ outc = 0;
+ }
+ linebuf[l - 1] = out[outc];
+ break;
+ }
+ case ' ':
+ break;
+ default:
+ if (((unsigned char)out[outc]) < 47) {
+ if (out[outc] > 32) {
+ right = out[outc] - 31;
+ if (++outc == bufsiz) {
+ bufsiz = getbuf();
+ outc = 0;
+ }
+ }
+ if (out[outc] == 30)
+ left = 9;
+ else
+ left = out[outc];
+ linebuf[l - 1] = '\n';
+ eol = 1;
+ }
+ }
+ if (++outc == bufsiz) {
+ outc = 0;
+ bufsiz = fin.is_open() ? getbuf() : -1;
+ }
+ }
+ if (right)
+ strcpy(linebuf + l - 1, line + strlen(line) - right - 1);
+ else
+ linebuf[l] = '\0';
+ strcpy(line + left, linebuf);
+ dest.assign(line);
+ return true;
+}
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