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color-words: refactor word splitting and use ALLOC_GROW()

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Word splitting is now performed by the function diff_words_fill(),
avoiding having the same code twice.

In the same spirit, avoid duplicating the code of ALLOC_GROW().

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2009-01-17 17:29:43 +01:00 committed by Junio C Hamano
parent 07b57e90f7
commit 23c1575f74
1 changed files with 19 additions and 21 deletions
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40
diff.c
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@ -326,10 +326,7 @@ struct diff_words_buffer {
static void diff_words_append(char *line, unsigned long len,
struct diff_words_buffer *buffer)
{
if (buffer->text.size + len > buffer->alloc) {
buffer->alloc = (buffer->text.size + len) * 3 / 2;
buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc);
}
ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc);
line++;
len--;
memcpy(buffer->text.ptr + buffer->text.size, line, len);
@ -398,6 +395,22 @@ static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len)
}
}
/*
* This function splits the words in buffer->text, and stores the list with
* newline separator into out.
*/
static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out)
{
int i;
out->size = buffer->text.size;
out->ptr = xmalloc(out->size);
memcpy(out->ptr, buffer->text.ptr, out->size);
for (i = 0; i < out->size; i++)
if (isspace(out->ptr[i]))
out->ptr[i] = '\n';
buffer->current = 0;
}
/* this executes the word diff on the accumulated buffers */
static void diff_words_show(struct diff_words_data *diff_words)
{
@ -405,26 +418,11 @@ static void diff_words_show(struct diff_words_data *diff_words)
xdemitconf_t xecfg;
xdemitcb_t ecb;
mmfile_t minus, plus;
int i;
memset(&xpp, 0, sizeof(xpp));
memset(&xecfg, 0, sizeof(xecfg));
minus.size = diff_words->minus.text.size;
minus.ptr = xmalloc(minus.size);
memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size);
for (i = 0; i < minus.size; i++)
if (isspace(minus.ptr[i]))
minus.ptr[i] = '\n';
diff_words->minus.current = 0;
plus.size = diff_words->plus.text.size;
plus.ptr = xmalloc(plus.size);
memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size);
for (i = 0; i < plus.size; i++)
if (isspace(plus.ptr[i]))
plus.ptr[i] = '\n';
diff_words->plus.current = 0;
diff_words_fill(&diff_words->minus, &minus);
diff_words_fill(&diff_words->plus, &plus);
xpp.flags = XDF_NEED_MINIMAL;
xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc;
xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words,