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xdiff: introduce xdl_calloc 

In preparation for introducing XDL_CALLOC_ARRAY() use calloc() to
obtain zeroed out memory rather than malloc() followed by memset(). To
try and keep the lines a reasonable length this commit also stops
casting the pointer returned by calloc() as this is unnecessary.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Phillip Wood 2022-07-08 16:25:17 +00:00 committed by Junio C Hamano
parent abf04bdaa8
commit 18aae7e21e
4 changed files with 15 additions and 24 deletions
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1
xdiff/xdiff.h
View File

@ -120,6 +120,7 @@ typedef struct s_bdiffparam {
#define xdl_malloc(x) xmalloc(x)
#define xdl_calloc(n, sz) xcalloc(n, sz)
#define xdl_free(ptr) free(ptr)
#define xdl_realloc(ptr,x) xrealloc(ptr,x)

22
xdiff/xhistogram.c
View File

@ -251,7 +251,7 @@ static int find_lcs(xpparam_t const *xpp, xdfenv_t *env,
int line1, int count1, int line2, int count2)
{
int b_ptr;
int sz, ret = -1;
int ret = -1;
struct histindex index;
memset(&index, 0, sizeof(index));
@ -265,23 +265,19 @@ static int find_lcs(xpparam_t const *xpp, xdfenv_t *env,
index.rcha.head = NULL;
index.table_bits = xdl_hashbits(count1);
sz = index.records_size = 1 << index.table_bits;
sz *= sizeof(struct record *);
if (!(index.records = (struct record **) xdl_malloc(sz)))
index.records_size = 1 << index.table_bits;
if (!(index.records = xdl_calloc(index.records_size,
sizeof(*index.records))))
goto cleanup;
memset(index.records, 0, sz);
sz = index.line_map_size = count1;
sz *= sizeof(struct record *);
if (!(index.line_map = (struct record **) xdl_malloc(sz)))
index.line_map_size = count1;
if (!(index.line_map = xdl_calloc(index.line_map_size,
sizeof(*index.line_map))))
goto cleanup;
memset(index.line_map, 0, sz);
sz = index.line_map_size;
sz *= sizeof(unsigned int);
if (!(index.next_ptrs = (unsigned int *) xdl_malloc(sz)))
if (!(index.next_ptrs = xdl_calloc(index.line_map_size,
sizeof(*index.next_ptrs))))
goto cleanup;
memset(index.next_ptrs, 0, sz);
/* lines / 4 + 1 comes from xprepare.c:xdl_prepare_ctx() */
if (xdl_cha_init(&index.rcha, sizeof(struct record), count1 / 4 + 1) < 0)

4
xdiff/xpatience.c
View File

@ -151,11 +151,9 @@ static int fill_hashmap(mmfile_t *file1, mmfile_t *file2,
/* We know exactly how large we want the hash map */
result->alloc = count1 * 2;
result->entries = (struct entry *)
xdl_malloc(result->alloc * sizeof(struct entry));
result->entries = xdl_calloc(result->alloc, sizeof(*result->entries));
if (!result->entries)
return -1;
memset(result->entries, 0, result->alloc * sizeof(struct entry));
/* First, fill with entries from the first file */
while (count1--)

12
xdiff/xprepare.c
View File

@ -78,12 +78,11 @@ static int xdl_init_classifier(xdlclassifier_t *cf, long size, long flags) {
return -1;
}
if (!(cf->rchash = (xdlclass_t **) xdl_malloc(cf->hsize * sizeof(xdlclass_t *)))) {
if (!(cf->rchash = xdl_calloc(cf->hsize, sizeof(*cf->rchash)))) {
xdl_cha_free(&cf->ncha);
return -1;
}
memset(cf->rchash, 0, cf->hsize * sizeof(xdlclass_t *));
cf->alloc = size;
if (!XDL_ALLOC_ARRAY(cf->rcrecs, cf->alloc)) {
@ -183,9 +182,8 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
hbits = xdl_hashbits((unsigned int) narec);
hsize = 1 << hbits;
if (!(rhash = (xrecord_t **) xdl_malloc(hsize * sizeof(xrecord_t *))))
if (!(rhash = xdl_calloc(hsize, sizeof(*rhash))))
goto abort;
memset(rhash, 0, hsize * sizeof(xrecord_t *));
nrec = 0;
if ((cur = blk = xdl_mmfile_first(mf, &bsize))) {
@ -209,9 +207,8 @@ static int xdl_prepare_ctx(unsigned int pass, mmfile_t *mf, long narec, xpparam_
}
}
if (!(rchg = (char *) xdl_malloc((nrec + 2) * sizeof(char))))
if (!(rchg = xdl_calloc((nrec + 2), sizeof(*rchg))))
goto abort;
memset(rchg, 0, (nrec + 2) * sizeof(char));
if ((XDF_DIFF_ALG(xpp->flags) != XDF_PATIENCE_DIFF) &&
(XDF_DIFF_ALG(xpp->flags) != XDF_HISTOGRAM_DIFF)) {
@ -383,11 +380,10 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd
xdlclass_t *rcrec;
char *dis, *dis1, *dis2;
if (!(dis = (char *) xdl_malloc(xdf1->nrec + xdf2->nrec + 2))) {
if (!(dis = xdl_calloc(xdf1->nrec + xdf2->nrec + 2, sizeof(*dis)))) {
return -1;
}
memset(dis, 0, xdf1->nrec + xdf2->nrec + 2);
dis1 = dis;
dis2 = dis1 + xdf1->nrec + 1;