Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/source/fitz/gz-doc.c @ 2:b50eed0cc0ef upstream

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
parents
children
comparison
equal deleted inserted replaced
1:1d09e1dec1d9 2:b50eed0cc0ef
1 // Copyright (C) 2023-2024 Artifex Software, Inc.
2 //
3 // This file is part of MuPDF.
4 //
5 // MuPDF is free software: you can redistribute it and/or modify it under the
6 // terms of the GNU Affero General Public License as published by the Free
7 // Software Foundation, either version 3 of the License, or (at your option)
8 // any later version.
9 //
10 // MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12 // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
13 // details.
14 //
15 // You should have received a copy of the GNU Affero General Public License
16 // along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
17 //
18 // Alternative licensing terms are available from the licensor.
19 // For commercial licensing, see <https://www.artifex.com/> or contact
20 // Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
21 // CA 94129, USA, for further information.
22
23 #include "mupdf/fitz.h"
24
25 #ifndef MAX_WBITS
26 # define MAX_WBITS 15 /* 32K LZ77 window */
27 #endif
28
29 static fz_document *
30 gz_open_document(fz_context *ctx, const fz_document_handler *handler, fz_stream *ostm, fz_stream *accel, fz_archive *dir, void *state)
31 {
32 fz_stream *stm = fz_open_flated(ctx, ostm, 16 + MAX_WBITS);
33 fz_buffer *buf = NULL;
34 fz_document *doc = NULL;
35
36 fz_var(buf);
37 fz_var(doc);
38
39 fz_try(ctx)
40 {
41 buf = fz_read_all(ctx, stm, 1024);
42 /* No way to pass the magic onwards :( */
43 doc = fz_open_document_with_buffer(ctx, "application/octet-stream", buf);
44 }
45 fz_always(ctx)
46 {
47 fz_drop_stream(ctx, stm);
48 fz_drop_buffer(ctx, buf);
49 }
50 fz_catch(ctx)
51 fz_rethrow(ctx);
52
53 return doc;
54 }
55
56 static const char *gz_extensions[] =
57 {
58 "gz",
59 NULL
60 };
61
62 static const char *gz_mimetypes[] =
63 {
64 "application/x-gzip-compressed",
65 NULL
66 };
67
68 static int
69 gz_recognize_doc_content(fz_context *ctx, const fz_document_handler *handler, fz_stream *stream, fz_archive *dir, void **state, fz_document_recognize_state_free_fn **free_state)
70 {
71 int ret = 0;
72 uint8_t data[10];
73
74 if (state)
75 *state = NULL;
76 if (free_state)
77 *free_state = NULL;
78
79 if (stream == NULL)
80 return 0;
81
82 fz_try(ctx)
83 {
84 fz_seek(ctx, stream, 0, SEEK_SET);
85 /* 10 byte header */
86 if (fz_read(ctx, stream, data, 10) != 10)
87 break;
88 /* We only actually check the first 3 bytes though. */
89 if (data[0] == 0x1f && data[1] == 0x8b && data[2] == 0x08)
90 ret = 100;
91 }
92 fz_catch(ctx)
93 fz_rethrow(ctx);
94
95 return ret;
96 }
97
98 fz_document_handler gz_document_handler =
99 {
100 NULL,
101 gz_open_document,
102 gz_extensions,
103 gz_mimetypes,
104 gz_recognize_doc_content
105 };