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e3f1da982e
Continue where ae021d87 (use skip_prefix to avoid magic numbers) left off
and use skip_prefix() in more places for determining the lengths of prefix
strings to avoid using dependent constants and other indirect methods.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
42 lines
980 B
C
42 lines
980 B
C
/*
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* Copyright (c) 2005, 2006 Rene Scharfe
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*/
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#include "cache.h"
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#include "commit.h"
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#include "tar.h"
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#include "builtin.h"
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#include "quote.h"
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static const char builtin_get_tar_commit_id_usage[] =
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"git get-tar-commit-id < <tarfile>";
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/* ustar header + extended global header content */
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#define RECORDSIZE (512)
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#define HEADERSIZE (2 * RECORDSIZE)
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int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
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{
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char buffer[HEADERSIZE];
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struct ustar_header *header = (struct ustar_header *)buffer;
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char *content = buffer + RECORDSIZE;
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const char *comment;
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ssize_t n;
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if (argc != 1)
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usage(builtin_get_tar_commit_id_usage);
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n = read_in_full(0, buffer, HEADERSIZE);
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if (n < HEADERSIZE)
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die("git get-tar-commit-id: read error");
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if (header->typeflag[0] != 'g')
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return 1;
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if (!skip_prefix(content, "52 comment=", &comment))
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return 1;
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n = write_in_full(1, comment, 41);
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if (n < 41)
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die_errno("git get-tar-commit-id: write error");
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return 0;
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}
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