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ll_merge() takes its options in a flag word, which has a few advantages: - options flags can be cheaply passed around in registers, while an option struct passed by pointer cannot; - callers can easily pass 0 without trouble for no options, while an option struct passed by value would not allow that. The downside is that code to populate and access the flag word can be somewhat opaque. Mitigate that with a few macros. Cc: Avery Pennarun <apenwarr@gmail.com> Cc: Bert Wesarg <bert.wesarg@googlemail.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
32 lines
698 B
C
32 lines
698 B
C
/*
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* Low level 3-way in-core file merge.
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*/
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#ifndef LL_MERGE_H
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#define LL_MERGE_H
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#define LL_OPT_VIRTUAL_ANCESTOR (1 << 0)
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#define LL_OPT_FAVOR_MASK ((1 << 1) | (1 << 2))
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#define LL_OPT_FAVOR_SHIFT 1
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static inline int ll_opt_favor(int flag)
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{
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return (flag & LL_OPT_FAVOR_MASK) >> LL_OPT_FAVOR_SHIFT;
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}
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static inline int create_ll_flag(int favor)
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{
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return ((favor << LL_OPT_FAVOR_SHIFT) & LL_OPT_FAVOR_MASK);
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}
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int ll_merge(mmbuffer_t *result_buf,
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const char *path,
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mmfile_t *ancestor, const char *ancestor_label,
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mmfile_t *ours, const char *our_label,
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mmfile_t *theirs, const char *their_label,
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int flag);
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int ll_merge_marker_size(const char *path);
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#endif
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