/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: 2026-04-13 07:02

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	5.53k	static void zip_source_file_stat_init(zip_source_file_stat_t *st) {
45	5.53k	st->size = 0;
46	5.53k	st->mtime = time(NULL);
47	5.53k	st->exists = false;
48	5.53k	st->regular_file = false;
49	5.53k	}
50
51	5.53k	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	5.53k	zip_source_file_context_t *ctx;
53	5.53k	zip_source_t *zs;
54	5.53k	zip_source_file_stat_t sb;
55	5.53k	zip_uint64_t length;
56
57	5.53k	if (ops == NULL) {
58	0	zip_error_set(error, ZIP_ER_INVAL, 0);
59	0	return NULL;
60	0	}
61
62	5.53k	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	5.53k	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	5.53k	if (fname != NULL) {
73	5.53k	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	5.53k	}
78	0	else if (file == NULL) {
79	0	zip_error_set(error, ZIP_ER_INVAL, 0);
80	0	return NULL;
81	0	}
82
83	5.53k	if (len < 0) {
84	5.53k	if (len == -1) {
85	5.53k	len = ZIP_LENGTH_TO_END;
86	5.53k	}
87		// TODO: return ZIP_ER_INVAL if len != ZIP_LENGTH_UNCHECKED?
88	5.53k	length = 0;
89	5.53k	}
90	0	else {
91	0	length = (zip_uint64_t)len;
92	0	}
93
94	5.53k	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	5.53k	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	5.53k	ctx->ops = ops;
105	5.53k	ctx->ops_userdata = ops_userdata;
106	5.53k	ctx->fname = NULL;
107	5.53k	if (fname) {
108	5.53k	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	5.53k	}
114	5.53k	ctx->f = file;
115	5.53k	ctx->start = start;
116	5.53k	ctx->len = length;
117	5.53k	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	5.53k	else {
123	5.53k	zip_stat_init(&ctx->st);
124	5.53k	}
125
126	5.53k	if (ctx->len > 0) {
127	0	ctx->st.size = ctx->len;
128	0	ctx->st.valid \|= ZIP_STAT_SIZE;
129	0	}
130
131	5.53k	zip_error_init(&ctx->stat_error);
132
133	5.53k	ctx->tmpname = NULL;
134	5.53k	ctx->fout = NULL;
135
136	5.53k	zip_error_init(&ctx->error);
137	5.53k	zip_file_attributes_init(&ctx->attributes);
138
139	5.53k	ctx->supports = ZIP_SOURCE_SUPPORTS_READABLE \| zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, ZIP_SOURCE_SUPPORTS_REOPEN, -1);
140
141	5.53k	zip_source_file_stat_init(&sb);
142	5.53k	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	5.53k	if (!sb.exists) {
150	1.03k	if (ctx->fname && ctx->start == 0 && ctx->len == 0 && ops->write != NULL) {
151	1.03k	ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
152		/* zip_open_from_source checks for this to detect non-existing files */
153	1.03k	zip_error_set(&ctx->stat_error, ZIP_ER_READ, ENOENT);
154	1.03k	}
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	1.03k	}
162	4.50k	else {
163	4.50k	if ((ctx->st.valid & ZIP_STAT_MTIME) == 0) {
164	4.50k	ctx->st.mtime = sb.mtime;
165	4.50k	ctx->st.valid \|= ZIP_STAT_MTIME;
166	4.50k	}
167	4.50k	if (sb.regular_file) {
168	4.50k	ctx->supports = ZIP_SOURCE_SUPPORTS_SEEKABLE;
169
170	4.50k	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	4.50k	if (ctx->len == 0) {
178	4.50k	if (len != ZIP_LENGTH_UNCHECKED) {
179	4.50k	ctx->len = sb.size - ctx->start;
180	4.50k	ctx->st.size = ctx->len;
181	4.50k	ctx->st.valid \|= ZIP_STAT_SIZE;
182	4.50k	}
183
184		/* when using a partial file, don't allow writing */
185	4.50k	if (ctx->fname && start == 0 && ops->write != NULL) {
186	4.50k	ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
187	4.50k	}
188	4.50k	}
189	4.50k	}
190
191	4.50k	ctx->supports \|= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_GET_FILE_ATTRIBUTES);
192	4.50k	}
193
194	5.53k	ctx->supports \|= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_ACCEPT_EMPTY);
195	5.53k	if (ops->create_temp_output_cloning != NULL) {
196	5.53k	if (ctx->supports & ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_BEGIN_WRITE)) {
197	5.53k	ctx->supports \|= ZIP_SOURCE_MAKE_COMMAND_BITMASK(ZIP_SOURCE_BEGIN_WRITE_CLONING);
198	5.53k	}
199	5.53k	}
200
201	5.53k	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	5.53k	return zs;
208	5.53k	}
209
210
211	341k	static zip_int64_t read_file(void state, void data, zip_uint64_t len, zip_source_cmd_t cmd) {
212	341k	zip_source_file_context_t *ctx;
213	341k	char *buf;
214
215	341k	ctx = (zip_source_file_context_t *)state;
216	341k	buf = (char *)data;
217
218	341k	switch (cmd) {
219	0	case ZIP_SOURCE_ACCEPT_EMPTY:
220	0	return 0;
221
222	1.03k	case ZIP_SOURCE_BEGIN_WRITE:
223		/* write support should not be set if fname is NULL */
224	1.03k	if (ctx->fname == NULL) {
225	0	zip_error_set(&ctx->error, ZIP_ER_INTERNAL, 0);
226	0	return -1;
227	0	}
228	1.03k	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	4.50k	case ZIP_SOURCE_CLOSE:
239	4.50k	if (ctx->fname) {
240	4.50k	ctx->ops->close(ctx);
241	4.50k	ctx->f = NULL;
242	4.50k	}
243	4.50k	return 0;
244
245	1.03k	case ZIP_SOURCE_COMMIT_WRITE: {
246	1.03k	zip_int64_t ret = ctx->ops->commit_write(ctx);
247	1.03k	ctx->fout = NULL;
248	1.03k	if (ret == 0) {
249	1.03k	free(ctx->tmpname);
250	1.03k	ctx->tmpname = NULL;
251	1.03k	}
252	1.03k	return ret;
253	0	}
254
255	4.83k	case ZIP_SOURCE_ERROR:
256	4.83k	return zip_error_to_data(&ctx->error, data, len);
257
258	5.53k	case ZIP_SOURCE_FREE:
259	5.53k	free(ctx->fname);
260	5.53k	free(ctx->tmpname);
261	5.53k	if (ctx->f) {
262	0	ctx->ops->close(ctx);
263	0	}
264	5.53k	free(ctx);
265	5.53k	return 0;
266
267	16.2k	case ZIP_SOURCE_GET_FILE_ATTRIBUTES:
268	16.2k	if (len < sizeof(ctx->attributes)) {
269	0	zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
270	0	return -1;
271	0	}
272	16.2k	(void)memcpy_s(data, sizeof(ctx->attributes), &ctx->attributes, sizeof(ctx->attributes));
273	16.2k	return sizeof(ctx->attributes);
274
275	4.50k	case ZIP_SOURCE_OPEN:
276	4.50k	if (ctx->fname) {
277	4.50k	if (ctx->ops->open(ctx) == false) {
278	0	return -1;
279	0	}
280	4.50k	}
281
282	4.50k	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	4.50k	ctx->offset = 0;
289	4.50k	return 0;
290
291	148k	case ZIP_SOURCE_READ: {
292	148k	zip_int64_t i;
293	148k	zip_uint64_t n;
294
295	148k	if (ctx->len > 0) {
296	148k	n = ZIP_MIN(ctx->len - ctx->offset, len);
297	148k	}
298	0	else {
299	0	n = len;
300	0	}
301
302	148k	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	148k	ctx->offset += (zip_uint64_t)i;
307
308	148k	return i;
309	148k	}
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	72.1k	case ZIP_SOURCE_SEEK: {
322	72.1k	zip_int64_t new_offset = zip_source_seek_compute_offset(ctx->offset, ctx->len, data, len, &ctx->error);
323
324	72.1k	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	68.3k	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	68.3k	ctx->offset = (zip_uint64_t)new_offset;
335
336	68.3k	if (ctx->ops->seek(ctx, ctx->f, (zip_int64_t)(ctx->offset + ctx->start), SEEK_SET) == false) {
337	0	return -1;
338	0	}
339	68.3k	return 0;
340	68.3k	}
341
342	2.06k	case ZIP_SOURCE_SEEK_WRITE: {
343	2.06k	zip_source_args_seek_t *args;
344
345	2.06k	args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
346	2.06k	if (args == NULL) {
347	0	return -1;
348	0	}
349
350	2.06k	if (ctx->ops->seek(ctx, ctx->fout, args->offset, args->whence) == false) {
351	0	return -1;
352	0	}
353	2.06k	return 0;
354	2.06k	}
355
356	30.8k	case ZIP_SOURCE_STAT: {
357	30.8k	if (len < sizeof(ctx->st)) {
358	0	return -1;
359	0	}
360
361	30.8k	if (zip_error_code_zip(&ctx->stat_error) != 0) {
362	1.03k	zip_error_set(&ctx->error, zip_error_code_zip(&ctx->stat_error), zip_error_code_system(&ctx->stat_error));
363	1.03k	return -1;
364	1.03k	}
365
366	29.7k	(void)memcpy_s(data, sizeof(ctx->st), &ctx->st, sizeof(ctx->st));
367	29.7k	return sizeof(ctx->st);
368	30.8k	}
369
370	5.53k	case ZIP_SOURCE_SUPPORTS:
371	5.53k	return ctx->supports;
372
373	4.60k	case ZIP_SOURCE_TELL:
374	4.60k	return (zip_int64_t)ctx->offset;
375
376	8.24k	case ZIP_SOURCE_TELL_WRITE:
377	8.24k	return ctx->ops->tell(ctx, ctx->fout);
378
379	32.0k	case ZIP_SOURCE_WRITE:
380	32.0k	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	341k	}
386	341k	}