150 lines
3.3 KiB
C
150 lines
3.3 KiB
C
#include "mupdf/fitz.h"
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/*
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Opens an archive entry as a stream.
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name: Entry name to look for, this must be an exact match to
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the entry name in the archive.
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*/
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fz_stream *
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fz_open_archive_entry(fz_context *ctx, fz_archive *arch, const char *name)
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{
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if (!arch->open_entry)
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fz_throw(ctx, FZ_ERROR_GENERIC, "cannot open archive entry");
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return arch->open_entry(ctx, arch, name);
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}
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/*
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Reads all bytes in an archive entry
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into a buffer.
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name: Entry name to look for, this must be an exact match to
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the entry name in the archive.
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*/
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fz_buffer *
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fz_read_archive_entry(fz_context *ctx, fz_archive *arch, const char *name)
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{
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if (!arch->read_entry)
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fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read archive entry");
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return arch->read_entry(ctx, arch, name);
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}
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/*
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Check if entry by given name exists.
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If named entry does not exist 0 will be returned, if it does
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exist 1 is returned.
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name: Entry name to look for, this must be an exact match to
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the entry name in the archive.
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*/
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int
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fz_has_archive_entry(fz_context *ctx, fz_archive *arch, const char *name)
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{
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if (!arch->has_entry)
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fz_throw(ctx, FZ_ERROR_GENERIC, "cannot check if archive has entry");
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return arch->has_entry(ctx, arch, name);
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}
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/*
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Get listed name of entry position idx.
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idx: Must be a value >= 0 < return value from
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fz_count_archive_entries. If not in range NULL will be
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returned.
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*/
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const char *
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fz_list_archive_entry(fz_context *ctx, fz_archive *arch, int idx)
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{
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if (!arch->list_entry)
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fz_throw(ctx, FZ_ERROR_GENERIC, "cannot list archive entries");
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return arch->list_entry(ctx, arch, idx);
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}
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/*
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Number of entries in archive.
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Will always return a value >= 0.
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*/
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int
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fz_count_archive_entries(fz_context *ctx, fz_archive *arch)
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{
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if (!arch->count_entries)
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fz_throw(ctx, FZ_ERROR_GENERIC, "cannot count archive entries");
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return arch->count_entries(ctx, arch);
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}
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const char *
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fz_archive_format(fz_context *ctx, fz_archive *arch)
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{
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return arch->format;
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}
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fz_archive *
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fz_new_archive_of_size(fz_context *ctx, fz_stream *file, int size)
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{
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fz_archive *arch;
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arch = Memento_label(fz_calloc(ctx, 1, size), "fz_archive");
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arch->file = fz_keep_stream(ctx, file);
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return arch;
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}
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/*
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Open zip or tar archive stream.
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Open an archive using a seekable stream object rather than
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opening a file or directory on disk.
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*/
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fz_archive *
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fz_open_archive_with_stream(fz_context *ctx, fz_stream *file)
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{
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fz_archive *arch = NULL;
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if (fz_is_zip_archive(ctx, file))
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arch = fz_open_zip_archive_with_stream(ctx, file);
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else if (fz_is_tar_archive(ctx, file))
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arch = fz_open_tar_archive_with_stream(ctx, file);
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else
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fz_throw(ctx, FZ_ERROR_GENERIC, "cannot recognize archive");
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return arch;
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}
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/*
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Open a zip or tar archive
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Open a file and identify its archive type based on the archive
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signature contained inside.
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filename: a path to a file as it would be given to open(2).
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*/
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fz_archive *
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fz_open_archive(fz_context *ctx, const char *filename)
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{
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fz_stream *file;
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fz_archive *arch = NULL;
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file = fz_open_file(ctx, filename);
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fz_try(ctx)
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arch = fz_open_archive_with_stream(ctx, file);
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fz_always(ctx)
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fz_drop_stream(ctx, file);
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fz_catch(ctx)
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fz_rethrow(ctx);
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return arch;
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}
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void
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fz_drop_archive(fz_context *ctx, fz_archive *arch)
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{
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if (!arch)
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return;
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if (arch->drop_archive)
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arch->drop_archive(ctx, arch);
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fz_drop_stream(ctx, arch->file);
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fz_free(ctx, arch);
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}
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