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d9ea73e056
This refactors the line-by-line callback mechanism used in combine-diff so that other programs can reuse it more easily. Signed-off-by: Junio C Hamano <junkio@cox.net>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#include "cache.h"
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#include "xdiff-interface.h"
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static void consume_one(void *priv_, char *s, unsigned long size)
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{
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struct xdiff_emit_state *priv = priv_;
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char *ep;
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while (size) {
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unsigned long this_size;
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ep = memchr(s, '\n', size);
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this_size = (ep == NULL) ? size : (ep - s + 1);
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priv->consume(priv, s, this_size);
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size -= this_size;
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s += this_size;
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}
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}
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int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf)
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{
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struct xdiff_emit_state *priv = priv_;
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int i;
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for (i = 0; i < nbuf; i++) {
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if (mb[i].ptr[mb[i].size-1] != '\n') {
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/* Incomplete line */
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priv->remainder = realloc(priv->remainder,
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priv->remainder_size +
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mb[i].size);
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memcpy(priv->remainder + priv->remainder_size,
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mb[i].ptr, mb[i].size);
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priv->remainder_size += mb[i].size;
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continue;
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}
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/* we have a complete line */
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if (!priv->remainder) {
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consume_one(priv, mb[i].ptr, mb[i].size);
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continue;
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}
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priv->remainder = realloc(priv->remainder,
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priv->remainder_size +
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mb[i].size);
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memcpy(priv->remainder + priv->remainder_size,
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mb[i].ptr, mb[i].size);
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consume_one(priv, priv->remainder,
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priv->remainder_size + mb[i].size);
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free(priv->remainder);
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priv->remainder = NULL;
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priv->remainder_size = 0;
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}
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if (priv->remainder) {
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consume_one(priv, priv->remainder, priv->remainder_size);
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free(priv->remainder);
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priv->remainder = NULL;
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priv->remainder_size = 0;
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}
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return 0;
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}
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