1 files changed, 90 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_source_file.h b/src/Common/libzip/zip_source_file.h
new file mode 100644
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+++ b/src/Common/libzip/zip_source_file.h
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+/*
+  zip_source_file.h -- header for common file operations
+  Copyright (C) 2020-2022 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.
+*/
+
+struct zip_source_file_stat {
+    zip_uint64_t size; /* must be valid for regular files */
+    time_t mtime;      /* must always be valid, is initialized to current time */
+    bool exists;       /* must always be valid */
+    bool regular_file; /* must always be valid */
+};
+
+typedef struct zip_source_file_context zip_source_file_context_t;
+typedef struct zip_source_file_operations zip_source_file_operations_t;
+typedef struct zip_source_file_stat zip_source_file_stat_t;
+
+struct zip_source_file_context {
+    zip_error_t error; /* last error information */
+    zip_int64_t supports;
+
+    /* reading */
+    char *fname;                      /* name of file to read from */
+    void *f;                          /* file to read from */
+    zip_stat_t st;                    /* stat information passed in */
+    zip_file_attributes_t attributes; /* additional file attributes */
+    zip_error_t stat_error;           /* error returned for stat */
+    zip_uint64_t start;               /* start offset of data to read */
+    zip_uint64_t len;                 /* length of the file, 0 for up to EOF */
+    zip_uint64_t offset;              /* current offset relative to start (0 is beginning of part we read) */
+
+    /* writing */
+    char *tmpname;
+    void *fout;
+
+    zip_source_file_operations_t *ops;
+    void *ops_userdata;
+};
+
+
+/* The following methods must be implemented to support each feature:
+   - close, read, seek, and stat must always be implemented.
+   - To support specifying the file by name, open, and strdup must be implemented.
+   - For write support, the file must be specified by name and close, commit_write, create_temp_output, remove, rollback_write, and tell must be implemented.
+   - create_temp_output_cloning is always optional. */
+
+struct zip_source_file_operations {
+    void (*close)(zip_source_file_context_t *ctx);
+    zip_int64_t (*commit_write)(zip_source_file_context_t *ctx);
+    zip_int64_t (*create_temp_output)(zip_source_file_context_t *ctx);
+    zip_int64_t (*create_temp_output_cloning)(zip_source_file_context_t *ctx, zip_uint64_t len);
+    bool (*open)(zip_source_file_context_t *ctx);
+    zip_int64_t (*read)(zip_source_file_context_t *ctx, void *buf, zip_uint64_t len);
+    zip_int64_t (*remove)(zip_source_file_context_t *ctx);
+    void (*rollback_write)(zip_source_file_context_t *ctx);
+    bool (*seek)(zip_source_file_context_t *ctx, void *f, zip_int64_t offset, int whence);
+    bool (*stat)(zip_source_file_context_t *ctx, zip_source_file_stat_t *st);
+    char *(*string_duplicate)(zip_source_file_context_t *ctx, const char *);
+    zip_int64_t (*tell)(zip_source_file_context_t *ctx, void *f);
+    zip_int64_t (*write)(zip_source_file_context_t *ctx, const void *data, zip_uint64_t len);
+};
+
+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);