summaryrefslogtreecommitdiff
path: root/libs/hunspell/src/hunzip.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'libs/hunspell/src/hunzip.cxx')
-rw-r--r--libs/hunspell/src/hunzip.cxx263
1 files changed, 263 insertions, 0 deletions
diff --git a/libs/hunspell/src/hunzip.cxx b/libs/hunspell/src/hunzip.cxx
new file mode 100644
index 0000000000..b2788a1055
--- /dev/null
+++ b/libs/hunspell/src/hunzip.cxx
@@ -0,0 +1,263 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * 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.
+ *
+ * The Original Code is Hunspell, based on MySpell.
+ *
+ * The Initial Developers of the Original Code are
+ * Kevin Hendricks (MySpell) and Németh László (Hunspell).
+ * Portions created by the Initial Developers are Copyright (C) 2002-2005
+ * the Initial Developers. All Rights Reserved.
+ *
+ * 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)
+ : fin(NULL), bufsiz(0), lastbit(0), inc(0), inbits(0), outc(0), dec(NULL) {
+ 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, p;
+ int allocatedbit = BASEBITREC;
+ const char* enc = key;
+
+ if (!filename)
+ return -1;
+
+ fin = myfopen(filename, "rb");
+ if (!fin)
+ return -1;
+
+ // read magic number
+ if ((fread(in, 1, 3, fin) < MAGICLEN) ||
+ !(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 (fread(&c, 1, 1, fin) < 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 (fread(&c, 1, 2, fin) < 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 = (struct bit*)malloc(BASEBITREC * sizeof(struct bit));
+ if (!dec)
+ return fail(MSG_MEMORY, filename);
+ dec[0].v[0] = 0;
+ dec[0].v[1] = 0;
+
+ // read codes
+ for (i = 0; i < n; i++) {
+ unsigned char l;
+ if (fread(c, 1, 2, fin) < 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 (fread(&l, 1, 1, fin) < 1)
+ return fail(MSG_FORMAT, filename);
+ if (key) {
+ if (*(++enc) == '\0')
+ enc = key;
+ l ^= *enc;
+ }
+ if (fread(in, 1, l / 8 + 1, fin) < (size_t)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;
+ }
+ 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 = (struct bit*)realloc(dec, allocatedbit * sizeof(struct bit));
+ }
+ 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 (dec)
+ free(dec);
+ if (fin)
+ fclose(fin);
+ if (filename)
+ free(filename);
+}
+
+int Hunzip::getbuf() {
+ int p = 0;
+ int o = 0;
+ do {
+ if (inc == 0)
+ inbits = fread(in, 1, BUFSIZE, fin) * 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) {
+ fclose(fin);
+ fin = NULL;
+ // 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);
+}
+
+const char* Hunzip::getline() {
+ char linebuf[BUFSIZE];
+ int l = 0, eol = 0, left = 0, right = 0;
+ if (bufsiz == -1)
+ return NULL;
+ 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 ? getbuf() : -1;
+ }
+ }
+ if (right)
+ strcpy(linebuf + l - 1, line + strlen(line) - right - 1);
+ else
+ linebuf[l] = '\0';
+ strcpy(line + left, linebuf);
+ return line;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 06:30:29 +0000