/src/libzip/lib/zip_source_file_common.c

Source
/*
  zip_source_file_common.c -- create data source from file
  Copyright (C) 1999-2025 Dieter Baron and Thomas Klausner

  This file is part of libzip, a library to manipulate ZIP archives.
  The authors can be contacted at <info@libzip.org>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in
     the documentation and/or other materials provided with the
     distribution.
  3. The names of the authors may not be used to endorse or promote
     products derived from this software without specific prior
     written permission.

  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "zipint.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "zip_source_file.h"

static zip_int64_t read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd);

static void zip_source_file_stat_init(zip_source_file_stat_t *st) {
    st->size = 0;
    st->mtime = time(NULL);
    st->exists = false;
    st->regular_file = false;
}

zip_source_t *zip_source_file_common_new(const char *fname, void *file, zip_uint64_t start, zip_int64_t len, const zip_stat_t *st, zip_source_file_operations_t *ops, void *ops_userdata, zip_error_t *error) {
    zip_source_file_context_t *ctx;
    zip_source_t *zs;
    zip_source_file_stat_t sb;
    zip_uint64_t length;

    if (ops == NULL) {
        zip_error_set(error, ZIP_ER_INVAL, 0);
        return NULL;
    }

    if (ops->close == NULL || ops->read == NULL || ops->seek == NULL || ops->stat == NULL) {
        zip_error_set(error, ZIP_ER_INTERNAL, 0);
        return NULL;
    }

    if (ops->write != NULL && (ops->commit_write == NULL || ops->create_temp_output == NULL || ops->remove == NULL || ops->rollback_write == NULL || ops->tell == NULL)) {
        zip_error_set(error, ZIP_ER_INTERNAL, 0);
        return NULL;
    }

    if (fname != NULL) {
        if (ops->open == NULL || ops->string_duplicate == NULL) {
            zip_error_set(error, ZIP_ER_INTERNAL, 0);
            return NULL;
        }
    }
    else if (file == NULL) {
        zip_error_set(error, ZIP_ER_INVAL, 0);
        return NULL;
    }

    if (len < 0) {
        if (len == -1) {
            len = ZIP_LENGTH_TO_END;
        }
        // TODO: return ZIP_ER_INVAL if len != ZIP_LENGTH_UNCHECKED?
        length = 0;
    }
    else {
        length = (zip_uint64_t)len;
    }

    if (start > ZIP_INT64_MAX || start + length < start) {
        zip_error_set(error, ZIP_ER_INVAL, 0);
        return NULL;
    }

    if ((ctx = (zip_source_file_context_t *)malloc(sizeof(zip_source_file_context_t))) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }

    ctx->ops = ops;
    ctx->ops_userdata = ops_userdata;
    ctx->fname = NULL;
    if (fname) {
        if ((ctx->fname = ops->string_duplicate(ctx, fname)) == NULL) {
            zip_error_set(error, ZIP_ER_MEMORY, 0);
            free(ctx);
            return NULL;
        }
    }
    ctx->f = file;
    ctx->start = start;
    ctx->len = length;
    if (st) {
        (void)memcpy_s(&ctx->st, sizeof(ctx->st), st, sizeof(*st));
        ctx->st.name = NULL;
        ctx->st.valid &= ~ZIP_STAT_NAME;
    }
    else {
        zip_stat_init(&ctx->st);
    }

    if (ctx->len > 0) {
        ctx->st.size = ctx->len;
        ctx->st.valid |= ZIP_STAT_SIZE;
    }

    zip_error_init(&ctx->stat_error);

    ctx->tmpname = NULL;
    ctx->fout = NULL;

    zip_error_init(&ctx->error);
    zip_file_attributes_init(&ctx->attributes);

    ctx->supports = ZIP_SOURCE_SUPPORTS_READABLE | zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, ZIP_SOURCE_SUPPORTS_REOPEN, -1);

    zip_source_file_stat_init(&sb);
    if (!ops->stat(ctx, &sb)) {
        _zip_error_copy(error, &ctx->error);
        free(ctx->fname);
        free(ctx);
        return NULL;
    }

    if (!sb.exists) {
        if (ctx->fname && ctx->start == 0 && ctx->len == 0 && ops->write != NULL) {
            ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
            /* zip_open_from_source checks for this to detect non-existing files */
            zip_error_set(&ctx->stat_error, ZIP_ER_READ, ENOENT);
        }
        else {
            zip_error_set(&ctx->stat_error, ZIP_ER_READ, ENOENT);
            free(ctx->fname);
            free(ctx);
            return NULL;
        }
    }
    else {
        if ((ctx->st.valid & ZIP_STAT_MTIME) == 0) {
            ctx->st.mtime = sb.mtime;
            ctx->st.valid |= ZIP_STAT_MTIME;
        }
        if (sb.regular_file) {
            ctx->supports = ZIP_SOURCE_SUPPORTS_SEEKABLE;

            if (ctx->start + ctx->len > sb.size) {
                zip_error_set(error, ZIP_ER_INVAL, 0);
                free(ctx->fname);
                free(ctx);
                return NULL;
            }

            if (ctx->len == 0) {
                if (len != ZIP_LENGTH_UNCHECKED) {
                    ctx->len = sb.size - ctx->start;
                    ctx->st.size = ctx->len;
                    ctx->st.valid |= ZIP_STAT_SIZE;
                }

                /* when using a partial file, don't allow writing */
                if (ctx->fname && start == 0 && ops->write != NULL) {
                    ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
                }
            }
        }

        ctx->supports |= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_GET_FILE_ATTRIBUTES);
    }

    ctx->supports |= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_ACCEPT_EMPTY);
    if (ops->create_temp_output_cloning != NULL) {
        if (ctx->supports & ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_BEGIN_WRITE)) {
            ctx->supports |= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_BEGIN_WRITE_CLONING);
        }
    }

    if ((zs = zip_source_function_create(read_file, ctx, error)) == NULL) {
        free(ctx->fname);
        free(ctx);
        return NULL;
    }

    return zs;
}


static zip_int64_t read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd) {
    zip_source_file_context_t *ctx;
    char *buf;

    ctx = (zip_source_file_context_t *)state;
    buf = (char *)data;

    switch (cmd) {
    case ZIP_SOURCE_ACCEPT_EMPTY:
        return 0;

    case ZIP_SOURCE_BEGIN_WRITE:
        /* write support should not be set if fname is NULL */
        if (ctx->fname == NULL) {
            zip_error_set(&ctx->error, ZIP_ER_INTERNAL, 0);
            return -1;
        }
        return ctx->ops->create_temp_output(ctx);

    case ZIP_SOURCE_BEGIN_WRITE_CLONING:
        /* write support should not be set if fname is NULL */
        if (ctx->fname == NULL) {
            zip_error_set(&ctx->error, ZIP_ER_INTERNAL, 0);
            return -1;
        }
        return ctx->ops->create_temp_output_cloning(ctx, len);

    case ZIP_SOURCE_CLOSE:
        if (ctx->fname) {
            ctx->ops->close(ctx);
            ctx->f = NULL;
        }
        return 0;

    case ZIP_SOURCE_COMMIT_WRITE: {
        zip_int64_t ret = ctx->ops->commit_write(ctx);
        ctx->fout = NULL;
        if (ret == 0) {
            free(ctx->tmpname);
            ctx->tmpname = NULL;
        }
        return ret;
    }

    case ZIP_SOURCE_ERROR:
        return zip_error_to_data(&ctx->error, data, len);

    case ZIP_SOURCE_FREE:
        free(ctx->fname);
        free(ctx->tmpname);
        if (ctx->f) {
            ctx->ops->close(ctx);
        }
        free(ctx);
        return 0;

    case ZIP_SOURCE_GET_FILE_ATTRIBUTES:
        if (len < sizeof(ctx->attributes)) {
            zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
            return -1;
        }
        (void)memcpy_s(data, sizeof(ctx->attributes), &ctx->attributes, sizeof(ctx->attributes));
        return sizeof(ctx->attributes);

    case ZIP_SOURCE_OPEN:
        if (ctx->fname) {
            if (ctx->ops->open(ctx) == false) {
                return -1;
            }
        }

        if (ctx->start > 0) { /* TODO: rewind on re-open */
            if (ctx->ops->seek(ctx, ctx->f, (zip_int64_t)ctx->start, SEEK_SET) == false) {
                /* TODO: skip by reading */
                return -1;
            }
        }
        ctx->offset = 0;
        return 0;

    case ZIP_SOURCE_READ: {
        zip_int64_t i;
        zip_uint64_t n;

        if (ctx->len > 0) {
            n = ZIP_MIN(ctx->len - ctx->offset, len);
        }
        else {
            n = len;
        }

        if ((i = ctx->ops->read(ctx, buf, n)) < 0) {
            zip_error_set(&ctx->error, ZIP_ER_READ, errno);
            return -1;
        }
        ctx->offset += (zip_uint64_t)i;

        return i;
    }

    case ZIP_SOURCE_REMOVE:
        return ctx->ops->remove(ctx);

    case ZIP_SOURCE_ROLLBACK_WRITE:
        ctx->ops->rollback_write(ctx);
        ctx->fout = NULL;
        free(ctx->tmpname);
        ctx->tmpname = NULL;
        return 0;

    case ZIP_SOURCE_SEEK: {
        zip_int64_t new_offset = zip_source_seek_compute_offset(ctx->offset, ctx->len, data, len, &ctx->error);

        if (new_offset < 0) {
            return -1;
        }

        /* The actual offset inside the file must be representable as zip_int64_t. */
        if (new_offset > ZIP_INT64_MAX - (zip_int64_t)ctx->start) {
            zip_error_set(&ctx->error, ZIP_ER_SEEK, EOVERFLOW);
            return -1;
        }

        ctx->offset = (zip_uint64_t)new_offset;

        if (ctx->ops->seek(ctx, ctx->f, (zip_int64_t)(ctx->offset + ctx->start), SEEK_SET) == false) {
            return -1;
        }
        return 0;
    }

    case ZIP_SOURCE_SEEK_WRITE: {
        zip_source_args_seek_t *args;

        args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
        if (args == NULL) {
            return -1;
        }

        if (ctx->ops->seek(ctx, ctx->fout, args->offset, args->whence) == false) {
            return -1;
        }
        return 0;
    }

    case ZIP_SOURCE_STAT: {
        if (len < sizeof(ctx->st)) {
            return -1;
        }

        if (zip_error_code_zip(&ctx->stat_error) != 0) {
            zip_error_set(&ctx->error, zip_error_code_zip(&ctx->stat_error), zip_error_code_system(&ctx->stat_error));
            return -1;
        }

        (void)memcpy_s(data, sizeof(ctx->st), &ctx->st, sizeof(ctx->st));
        return sizeof(ctx->st);
    }

    case ZIP_SOURCE_SUPPORTS:
        return ctx->supports;

    case ZIP_SOURCE_TELL:
        return (zip_int64_t)ctx->offset;

    case ZIP_SOURCE_TELL_WRITE:
        return ctx->ops->tell(ctx, ctx->fout);

    case ZIP_SOURCE_WRITE:
        return ctx->ops->write(ctx, data, len);

    default:
        zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
        return -1;
    }
}

Coverage Report

Created: 2026-06-02 06:56

Line	Count	Source
1		/*
2		zip_source_file_common.c -- create data source from file
3		Copyright (C) 1999-2025 Dieter Baron and Thomas Klausner
4
5		This file is part of libzip, a library to manipulate ZIP archives.
6		The authors can be contacted at <info@libzip.org>
7
8		Redistribution and use in source and binary forms, with or without
9		modification, are permitted provided that the following conditions
10		are met:
11		1. Redistributions of source code must retain the above copyright
12		notice, this list of conditions and the following disclaimer.
13		2. Redistributions in binary form must reproduce the above copyright
14		notice, this list of conditions and the following disclaimer in
15		the documentation and/or other materials provided with the
16		distribution.
17		3. The names of the authors may not be used to endorse or promote
18		products derived from this software without specific prior
19		written permission.
20
21		THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
22		OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23		WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24		ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
25		DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26		DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27		GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28		INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
29		IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30		OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
31		IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32		*/
33
34		#include "zipint.h"
35
36		#include <stdio.h>
37		#include <stdlib.h>
38		#include <string.h>
39
40		#include "zip_source_file.h"
41
42		static zip_int64_t read_file(void state, void data, zip_uint64_t len, zip_source_cmd_t cmd);
43
44	4.97k	static void zip_source_file_stat_init(zip_source_file_stat_t *st) {
45	4.97k	st->size = 0;
46	4.97k	st->mtime = time(NULL);
47	4.97k	st->exists = false;
48	4.97k	st->regular_file = false;
49	4.97k	}
50
51	4.97k	zip_source_t zip_source_file_common_new(const char fname, void file, zip_uint64_t start, zip_int64_t len, const zip_stat_t st, zip_source_file_operations_t ops, void ops_userdata, zip_error_t *error) {
52	4.97k	zip_source_file_context_t *ctx;
53	4.97k	zip_source_t *zs;
54	4.97k	zip_source_file_stat_t sb;
55	4.97k	zip_uint64_t length;
56
57	4.97k	if (ops == NULL) {
58	0	zip_error_set(error, ZIP_ER_INVAL, 0);
59	0	return NULL;
60	0	}
61
62	4.97k	if (ops->close == NULL \|\| ops->read == NULL \|\| ops->seek == NULL \|\| ops->stat == NULL) {
63	0	zip_error_set(error, ZIP_ER_INTERNAL, 0);
64	0	return NULL;
65	0	}
66
67	4.97k	if (ops->write != NULL && (ops->commit_write == NULL \|\| ops->create_temp_output == NULL \|\| ops->remove == NULL \|\| ops->rollback_write == NULL \|\| ops->tell == NULL)) {
68	0	zip_error_set(error, ZIP_ER_INTERNAL, 0);
69	0	return NULL;
70	0	}
71
72	4.97k	if (fname != NULL) {
73	4.97k	if (ops->open == NULL \|\| ops->string_duplicate == NULL) {
74	0	zip_error_set(error, ZIP_ER_INTERNAL, 0);
75	0	return NULL;
76	0	}
77	4.97k	}
78	0	else if (file == NULL) {
79	0	zip_error_set(error, ZIP_ER_INVAL, 0);
80	0	return NULL;
81	0	}
82
83	4.97k	if (len < 0) {
84	4.97k	if (len == -1) {
85	4.97k	len = ZIP_LENGTH_TO_END;
86	4.97k	}
87		// TODO: return ZIP_ER_INVAL if len != ZIP_LENGTH_UNCHECKED?
88	4.97k	length = 0;
89	4.97k	}
90	0	else {
91	0	length = (zip_uint64_t)len;
92	0	}
93
94	4.97k	if (start > ZIP_INT64_MAX \|\| start + length < start) {
95	0	zip_error_set(error, ZIP_ER_INVAL, 0);
96	0	return NULL;
97	0	}
98
99	4.97k	if ((ctx = (zip_source_file_context_t *)malloc(sizeof(zip_source_file_context_t))) == NULL) {
100	0	zip_error_set(error, ZIP_ER_MEMORY, 0);
101	0	return NULL;
102	0	}
103
104	4.97k	ctx->ops = ops;
105	4.97k	ctx->ops_userdata = ops_userdata;
106	4.97k	ctx->fname = NULL;
107	4.97k	if (fname) {
108	4.97k	if ((ctx->fname = ops->string_duplicate(ctx, fname)) == NULL) {
109	0	zip_error_set(error, ZIP_ER_MEMORY, 0);
110	0	free(ctx);
111	0	return NULL;
112	0	}
113	4.97k	}
114	4.97k	ctx->f = file;
115	4.97k	ctx->start = start;
116	4.97k	ctx->len = length;
117	4.97k	if (st) {
118	0	(void)memcpy_s(&ctx->st, sizeof(ctx->st), st, sizeof(*st));
119	0	ctx->st.name = NULL;
120	0	ctx->st.valid &= ~ZIP_STAT_NAME;
121	0	}
122	4.97k	else {
123	4.97k	zip_stat_init(&ctx->st);
124	4.97k	}
125
126	4.97k	if (ctx->len > 0) {
127	0	ctx->st.size = ctx->len;
128	0	ctx->st.valid \|= ZIP_STAT_SIZE;
129	0	}
130
131	4.97k	zip_error_init(&ctx->stat_error);
132
133	4.97k	ctx->tmpname = NULL;
134	4.97k	ctx->fout = NULL;
135
136	4.97k	zip_error_init(&ctx->error);
137	4.97k	zip_file_attributes_init(&ctx->attributes);
138
139	4.97k	ctx->supports = ZIP_SOURCE_SUPPORTS_READABLE \| zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, ZIP_SOURCE_SUPPORTS_REOPEN, -1);
140
141	4.97k	zip_source_file_stat_init(&sb);
142	4.97k	if (!ops->stat(ctx, &sb)) {
143	0	_zip_error_copy(error, &ctx->error);
144	0	free(ctx->fname);
145	0	free(ctx);
146	0	return NULL;
147	0	}
148
149	4.97k	if (!sb.exists) {
150	490	if (ctx->fname && ctx->start == 0 && ctx->len == 0 && ops->write != NULL) {
151	490	ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
152		/* zip_open_from_source checks for this to detect non-existing files */
153	490	zip_error_set(&ctx->stat_error, ZIP_ER_READ, ENOENT);
154	490	}
155	0	else {
156	0	zip_error_set(&ctx->stat_error, ZIP_ER_READ, ENOENT);
157	0	free(ctx->fname);
158	0	free(ctx);
159	0	return NULL;
160	0	}
161	490	}
162	4.48k	else {
163	4.48k	if ((ctx->st.valid & ZIP_STAT_MTIME) == 0) {
164	4.48k	ctx->st.mtime = sb.mtime;
165	4.48k	ctx->st.valid \|= ZIP_STAT_MTIME;
166	4.48k	}
167	4.48k	if (sb.regular_file) {
168	4.48k	ctx->supports = ZIP_SOURCE_SUPPORTS_SEEKABLE;
169
170	4.48k	if (ctx->start + ctx->len > sb.size) {
171	0	zip_error_set(error, ZIP_ER_INVAL, 0);
172	0	free(ctx->fname);
173	0	free(ctx);
174	0	return NULL;
175	0	}
176
177	4.48k	if (ctx->len == 0) {
178	4.48k	if (len != ZIP_LENGTH_UNCHECKED) {
179	4.48k	ctx->len = sb.size - ctx->start;
180	4.48k	ctx->st.size = ctx->len;
181	4.48k	ctx->st.valid \|= ZIP_STAT_SIZE;
182	4.48k	}
183
184		/* when using a partial file, don't allow writing */
185	4.48k	if (ctx->fname && start == 0 && ops->write != NULL) {
186	4.48k	ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
187	4.48k	}
188	4.48k	}
189	4.48k	}
190
191	4.48k	ctx->supports \|= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_GET_FILE_ATTRIBUTES);
192	4.48k	}
193
194	4.97k	ctx->supports \|= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_ACCEPT_EMPTY);
195	4.97k	if (ops->create_temp_output_cloning != NULL) {
196	4.97k	if (ctx->supports & ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_BEGIN_WRITE)) {
197	4.97k	ctx->supports \|= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_BEGIN_WRITE_CLONING);
198	4.97k	}
199	4.97k	}
200
201	4.97k	if ((zs = zip_source_function_create(read_file, ctx, error)) == NULL) {
202	0	free(ctx->fname);
203	0	free(ctx);
204	0	return NULL;
205	0	}
206
207	4.97k	return zs;
208	4.97k	}
209
210
211	290k	static zip_int64_t read_file(void state, void data, zip_uint64_t len, zip_source_cmd_t cmd) {
212	290k	zip_source_file_context_t *ctx;
213	290k	char *buf;
214
215	290k	ctx = (zip_source_file_context_t *)state;
216	290k	buf = (char *)data;
217
218	290k	switch (cmd) {
219	0	case ZIP_SOURCE_ACCEPT_EMPTY:
220	0	return 0;
221
222	490	case ZIP_SOURCE_BEGIN_WRITE:
223		/* write support should not be set if fname is NULL */
224	490	if (ctx->fname == NULL) {
225	0	zip_error_set(&ctx->error, ZIP_ER_INTERNAL, 0);
226	0	return -1;
227	0	}
228	490	return ctx->ops->create_temp_output(ctx);
229
230	0	case ZIP_SOURCE_BEGIN_WRITE_CLONING:
231		/* write support should not be set if fname is NULL */
232	0	if (ctx->fname == NULL) {
233	0	zip_error_set(&ctx->error, ZIP_ER_INTERNAL, 0);
234	0	return -1;
235	0	}
236	0	return ctx->ops->create_temp_output_cloning(ctx, len);
237
238	4.48k	case ZIP_SOURCE_CLOSE:
239	4.48k	if (ctx->fname) {
240	4.48k	ctx->ops->close(ctx);
241	4.48k	ctx->f = NULL;
242	4.48k	}
243	4.48k	return 0;
244
245	490	case ZIP_SOURCE_COMMIT_WRITE: {
246	490	zip_int64_t ret = ctx->ops->commit_write(ctx);
247	490	ctx->fout = NULL;
248	490	if (ret == 0) {
249	490	free(ctx->tmpname);
250	490	ctx->tmpname = NULL;
251	490	}
252	490	return ret;
253	0	}
254
255	4.29k	case ZIP_SOURCE_ERROR:
256	4.29k	return zip_error_to_data(&ctx->error, data, len);
257
258	4.97k	case ZIP_SOURCE_FREE:
259	4.97k	free(ctx->fname);
260	4.97k	free(ctx->tmpname);
261	4.97k	if (ctx->f) {
262	0	ctx->ops->close(ctx);
263	0	}
264	4.97k	free(ctx);
265	4.97k	return 0;
266
267	12.8k	case ZIP_SOURCE_GET_FILE_ATTRIBUTES:
268	12.8k	if (len < sizeof(ctx->attributes)) {
269	0	zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
270	0	return -1;
271	0	}
272	12.8k	(void)memcpy_s(data, sizeof(ctx->attributes), &ctx->attributes, sizeof(ctx->attributes));
273	12.8k	return sizeof(ctx->attributes);
274
275	4.48k	case ZIP_SOURCE_OPEN:
276	4.48k	if (ctx->fname) {
277	4.48k	if (ctx->ops->open(ctx) == false) {
278	0	return -1;
279	0	}
280	4.48k	}
281
282	4.48k	if (ctx->start > 0) { /* TODO: rewind on re-open */
283	0	if (ctx->ops->seek(ctx, ctx->f, (zip_int64_t)ctx->start, SEEK_SET) == false) {
284		/* TODO: skip by reading */
285	0	return -1;
286	0	}
287	0	}
288	4.48k	ctx->offset = 0;
289	4.48k	return 0;
290
291	139k	case ZIP_SOURCE_READ: {
292	139k	zip_int64_t i;
293	139k	zip_uint64_t n;
294
295	139k	if (ctx->len > 0) {
296	139k	n = ZIP_MIN(ctx->len - ctx->offset, len);
297	139k	}
298	0	else {
299	0	n = len;
300	0	}
301
302	139k	if ((i = ctx->ops->read(ctx, buf, n)) < 0) {
303	0	zip_error_set(&ctx->error, ZIP_ER_READ, errno);
304	0	return -1;
305	0	}
306	139k	ctx->offset += (zip_uint64_t)i;
307
308	139k	return i;
309	139k	}
310
311	0	case ZIP_SOURCE_REMOVE:
312	0	return ctx->ops->remove(ctx);
313
314	0	case ZIP_SOURCE_ROLLBACK_WRITE:
315	0	ctx->ops->rollback_write(ctx);
316	0	ctx->fout = NULL;
317	0	free(ctx->tmpname);
318	0	ctx->tmpname = NULL;
319	0	return 0;
320
321	63.1k	case ZIP_SOURCE_SEEK: {
322	63.1k	zip_int64_t new_offset = zip_source_seek_compute_offset(ctx->offset, ctx->len, data, len, &ctx->error);
323
324	63.1k	if (new_offset < 0) {
325	3.80k	return -1;
326	3.80k	}
327
328		/* The actual offset inside the file must be representable as zip_int64_t. */
329	59.3k	if (new_offset > ZIP_INT64_MAX - (zip_int64_t)ctx->start) {
330	0	zip_error_set(&ctx->error, ZIP_ER_SEEK, EOVERFLOW);
331	0	return -1;
332	0	}
333
334	59.3k	ctx->offset = (zip_uint64_t)new_offset;
335
336	59.3k	if (ctx->ops->seek(ctx, ctx->f, (zip_int64_t)(ctx->offset + ctx->start), SEEK_SET) == false) {
337	0	return -1;
338	0	}
339	59.3k	return 0;
340	59.3k	}
341
342	980	case ZIP_SOURCE_SEEK_WRITE: {
343	980	zip_source_args_seek_t *args;
344
345	980	args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
346	980	if (args == NULL) {
347	0	return -1;
348	0	}
349
350	980	if (ctx->ops->seek(ctx, ctx->fout, args->offset, args->whence) == false) {
351	0	return -1;
352	0	}
353	980	return 0;
354	980	}
355
356	26.4k	case ZIP_SOURCE_STAT: {
357	26.4k	if (len < sizeof(ctx->st)) {
358	0	return -1;
359	0	}
360
361	26.4k	if (zip_error_code_zip(&ctx->stat_error) != 0) {
362	490	zip_error_set(&ctx->error, zip_error_code_zip(&ctx->stat_error), zip_error_code_system(&ctx->stat_error));
363	490	return -1;
364	490	}
365
366	25.9k	(void)memcpy_s(data, sizeof(ctx->st), &ctx->st, sizeof(ctx->st));
367	25.9k	return sizeof(ctx->st);
368	26.4k	}
369
370	4.97k	case ZIP_SOURCE_SUPPORTS:
371	4.97k	return ctx->supports;
372
373	4.57k	case ZIP_SOURCE_TELL:
374	4.57k	return (zip_int64_t)ctx->offset;
375
376	3.92k	case ZIP_SOURCE_TELL_WRITE:
377	3.92k	return ctx->ops->tell(ctx, ctx->fout);
378
379	14.6k	case ZIP_SOURCE_WRITE:
380	14.6k	return ctx->ops->write(ctx, data, len);
381
382	0	default:
383	0	zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
384	0	return -1;
385	290k	}
386	290k	}