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05 April 2024, 19:32:26 UTC
Revision 84d06cdc06389ae7c462434cb7b1db0980f63860 authored by Junio C Hamano on 26 March 2021, 21:59:47 UTC, committed by Junio C Hamano on 26 March 2021, 21:59:47 UTC 
Sync with v2.31.1
2 parent s 26c4f98 + 48bf2fa
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Tip revision: 84d06cdc06389ae7c462434cb7b1db0980f63860 authored by Junio C Hamano on 26 March 2021, 21:59:47 UTC
Sync with v2.31.1
Tip revision: 84d06cd
diffcore-rotate.c 
/*
 * Copyright (C) 2021, Google LLC.
 * Based on diffcore-order.c, which is Copyright (C) 2005, Junio C Hamano
 */
#include "cache.h"
#include "diff.h"
#include "diffcore.h"

void diffcore_rotate(struct diff_options *opt)
{
	struct diff_queue_struct *q = &diff_queued_diff;
	struct diff_queue_struct outq;
	int rotate_to, i;

	if (!q->nr)
		return;

	for (i = 0; i < q->nr; i++) {
		int cmp = strcmp(opt->rotate_to, q->queue[i]->two->path);
		if (!cmp)
			break; /* exact match */
		if (!opt->rotate_to_strict && cmp < 0)
			break; /* q->queue[i] is now past the target pathname */
	}

	if (q->nr <= i) {
		/* we did not find the specified path */
		if (opt->rotate_to_strict)
			die(_("No such path '%s' in the diff"), opt->rotate_to);
		return;
	}

	DIFF_QUEUE_CLEAR(&outq);
	rotate_to = i;

	for (i = rotate_to; i < q->nr; i++)
		diff_q(&outq, q->queue[i]);
	for (i = 0; i < rotate_to; i++) {
		if (opt->skip_instead_of_rotate)
			diff_free_filepair(q->queue[i]);
		else
			diff_q(&outq, q->queue[i]);
	}
	free(q->queue);
	*q = outq;
}
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