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83361f5cde
Walking forward through history (i.e., topologically earliest commits first), we filter the parent list of every commit as follows. Consider a parent P: - If P touches any of the interesting line ranges, we keep it. - If P is a merge and it takes all the interesting line ranges from one of its parents, P is rewritten to this parent, else we keep P. - Otherwise, P is rewritten to its (only) parent P^. Signed-off-by: Bo Yang <struggleyb.nku@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
#ifndef LINE_H
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#define LINE_H
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#include "diffcore.h"
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struct rev_info;
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struct commit;
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struct diff_line_range;
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struct diff_options;
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typedef const char *(*nth_line_fn_t)(void *data, long lno);
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struct print_range {
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int start, end; /* Line range of post-image */
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int pstart, pend; /* Line range of pre-image */
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int line_added : 1; /* whether this range is added */
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};
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struct print_pair {
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int alloc, nr;
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struct print_range *ranges;
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};
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#define PRINT_RANGE_INIT(r) \
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do { \
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(r)->start = (r)->end = 0; \
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(r)->pstart = (r)->pend = 0; \
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(r)->line_added = 0; \
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} while (0)
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#define PRINT_PAIR_INIT(p) \
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do { \
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(p)->alloc = (p)->nr = 0; \
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(p)->ranges = NULL; \
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} while (0)
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#define PRINT_PAIR_GROW(p) \
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do { \
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(p)->nr++; \
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ALLOC_GROW((p)->ranges, (p)->nr, (p)->alloc); \
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} while (0)
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#define PRINT_PAIR_CLEAR(p) \
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do { \
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(p)->alloc = (p)->nr = 0; \
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if ((p)->ranges) \
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free((p)->ranges); \
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(p)->ranges = NULL; \
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} while (0)
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struct line_range {
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const char *arg; /* The argument to specify this line range */
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long start, end; /* The interesting line range of current commit */
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long pstart, pend; /* The corresponding range of parent commit */
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struct print_pair pair;
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/* The changed lines inside this range */
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unsigned int diff:1;
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};
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struct diff_line_range {
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struct diff_filespec *prev;
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struct diff_filespec *spec;
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char status;
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int alloc;
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int nr;
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struct line_range *ranges;
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unsigned int touch:1,
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diff:1;
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struct diff_line_range *next;
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};
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#define RANGE_INIT(r) \
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do { \
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(r)->arg = NULL; \
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(r)->start = (r)->end = 0; \
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(r)->pstart = (r)->pend = 0; \
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PRINT_PAIR_INIT(&((r)->pair)); \
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(r)->diff = 0; \
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} while (0)
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#define RANGE_CLEAR(r) \
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do { \
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(r)->arg = NULL; \
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(r)->start = (r)->end = 0; \
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(r)->pstart = (r)->pend = 0; \
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PRINT_PAIR_CLEAR(&r->pair); \
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(r)->diff = 0; \
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} while (0)
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#define DIFF_LINE_RANGE_INIT(r) \
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do { \
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(r)->prev = (r)->spec = NULL; \
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(r)->status = '\0'; \
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(r)->alloc = (r)->nr = 0; \
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(r)->ranges = NULL; \
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(r)->next = NULL; \
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(r)->touch = 0; \
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(r)->diff = 0; \
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} while (0)
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#define DIFF_LINE_RANGE_GROW(r) \
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do { \
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(r)->nr++; \
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ALLOC_GROW((r)->ranges, (r)->nr, (r)->alloc); \
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RANGE_INIT(((r)->ranges + (r)->nr - 1)); \
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} while (0)
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#define DIFF_LINE_RANGE_CLEAR(r) \
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diff_line_range_clear((r));
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extern struct line_range *diff_line_range_insert(struct diff_line_range *r,
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const char *arg, int start, int end);
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extern void diff_line_range_append(struct diff_line_range *r, const char *arg);
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extern void diff_line_range_clear(struct diff_line_range *r);
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extern struct diff_line_range *diff_line_range_merge(
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struct diff_line_range *out,
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struct diff_line_range *other);
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extern struct diff_line_range *diff_line_range_clone(struct diff_line_range *r);
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extern struct diff_line_range *diff_line_range_clone_deeply(struct diff_line_range *r);
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extern void setup_line(struct rev_info *rev, struct diff_line_range *r);
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extern void add_line_range(struct rev_info *revs, struct commit *commit,
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struct diff_line_range *r);
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extern struct diff_line_range *lookup_line_range(struct rev_info *revs,
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struct commit *commit);
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const char *parse_loc(const char *spec, nth_line_fn_t nth_line,
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void *data, long lines, long begin, long *ret);
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extern int cmd_line_log_walk(struct rev_info *rev);
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extern void limit_list_line(struct rev_info *rev);
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#endif
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