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thodg/got/lib/got_lib_inflate.h

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  • Author : Stefan Sperling
    Date : 2020-03-24 15:15:51
    Hash : 6ad68bce
    Message : make got-index-pack compute and verify the pack file's SHA1 checksum

  • lib/got_lib_inflate.h
  • /*
     * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
     *
     * Permission to use, copy, modify, and distribute this software for any
     * purpose with or without fee is hereby granted, provided that the above
     * copyright notice and this permission notice appear in all copies.
     *
     * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     */
    
    struct got_inflate_checksum {
    	/* If not NULL, mix input bytes into this CRC checksum. */
    	uint32_t *input_crc;
    
    	/* If not NULL, mix input bytes into this SHA1 context. */
    	SHA1_CTX *input_sha1;
    };
    
    struct got_inflate_buf {
    	z_stream z;
    	char *inbuf;
    	size_t inlen;
    	char *outbuf;
    	size_t outlen;
    	int flags;
    #define GOT_INFLATE_F_HAVE_MORE		0x01
    #define GOT_INFLATE_F_OWN_OUTBUF	0x02
    	struct got_inflate_checksum *csum;
    };
    
    #define GOT_INFLATE_BUFSIZE		32768
    
    const struct got_error *got_inflate_init(struct got_inflate_buf *, uint8_t *,
        size_t, struct got_inflate_checksum *);
    const struct got_error *got_inflate_read(struct got_inflate_buf *, FILE *,
        size_t *, size_t *);
    const struct got_error *got_inflate_read_fd(struct got_inflate_buf *, int,
        size_t *, size_t *);
    const struct got_error *got_inflate_read_mmap(struct got_inflate_buf *,
        uint8_t *, size_t, size_t, size_t *, size_t *);
    void got_inflate_end(struct got_inflate_buf *);
    const struct got_error *got_inflate_to_mem(uint8_t **, size_t *, size_t *,
        FILE *);
    const struct got_error *got_inflate_to_mem_fd(uint8_t **, size_t *, size_t *,
        struct got_inflate_checksum *, size_t, int);
    const struct got_error *got_inflate_to_mem_mmap(uint8_t **, size_t *, size_t *,
        struct got_inflate_checksum *, uint8_t *, size_t, size_t);
    const struct got_error *got_inflate_to_file(size_t *, FILE *, FILE *);
    const struct got_error *got_inflate_to_file_fd(size_t *, size_t *,
        struct got_inflate_checksum *, int, FILE *);
    const struct got_error *got_inflate_to_fd(size_t *, FILE *, int);
    const struct got_error *got_inflate_to_file_mmap(size_t *, size_t *,
        struct got_inflate_checksum *, uint8_t *, size_t, size_t, FILE *);