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refactor(diff.c): allocate hunks directly in ga_array

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This commit is contained in:
Lewis Russell
2022-10-23 12:38:19 +01:00
parent a6e404b7d5
commit 267494151b
1 changed files with 28 additions and 37 deletions
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65
src/nvim/diff.c
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@@ -26,6 +26,7 @@
#include "nvim/ex_docmd.h"
#include "nvim/fileio.h"
#include "nvim/fold.h"
#include "nvim/garray.h"
#include "nvim/mark.h"
#include "nvim/mbyte.h"
#include "nvim/memline.h"
@@ -710,7 +711,7 @@ static void clear_diffin(diffin_T *din)
static void clear_diffout(diffout_T *dout)
{
if (dout->dout_fname == NULL) {
ga_clear_strings(&dout->dout_ga);
ga_clear(&dout->dout_ga);
} else {
os_remove(dout->dout_fname);
}
@@ -820,7 +821,7 @@ static int diff_write(buf_T *buf, diffin_T *din)
static void diff_try_update(diffio_T *dio, int idx_orig, exarg_T *eap)
{
if (dio->dio_internal) {
ga_init(&dio->dio_diff.dout_ga, sizeof(char *), 1000);
ga_init(&dio->dio_diff.dout_ga, sizeof(diffhunk_T), 100);
} else {
// We need three temp file names.
dio->dio_orig.din_fname = vim_tempname();
@@ -1552,18 +1553,14 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
}
}
diffhunk_T *hunk = NULL;
if (!dio->dio_internal) {
hunk = xmalloc(sizeof(*hunk));
}
diffhunk_T hunk;
for (;;) {
if (dio->dio_internal) {
if (line_idx >= dout->dout_ga.ga_len) {
break; // did last line
}
hunk = ((diffhunk_T **)dout->dout_ga.ga_data)[line_idx++];
hunk = ((diffhunk_T *)dout->dout_ga.ga_data)[line_idx++];
} else {
char *line;
char linebuf[LBUFLEN]; // only need to hold the diff line
@@ -1611,7 +1608,7 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
if (!isdigit(*line)) {
continue; // not the start of a diff block
}
if (parse_diff_ed(line, hunk) == FAIL) {
if (parse_diff_ed(line, &hunk) == FAIL) {
continue;
}
} else {
@@ -1619,7 +1616,7 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
if (STRNCMP(line, "@@ ", 3) != 0) {
continue; // not the start of a diff block
}
if (parse_diff_unified(line, hunk) == FAIL) {
if (parse_diff_unified(line, &hunk) == FAIL) {
continue;
}
}
@@ -1628,7 +1625,7 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
// Go over blocks before the change, for which orig and new are equal.
// Copy blocks from orig to new.
while (dp != NULL
&& hunk->lnum_orig > dp->df_lnum[idx_orig] + dp->df_count[idx_orig]) {
&& hunk.lnum_orig > dp->df_lnum[idx_orig] + dp->df_count[idx_orig]) {
if (notset) {
diff_copy_entry(dprev, dp, idx_orig, idx_new);
}
@@ -1638,20 +1635,20 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
}
if ((dp != NULL)
&& (hunk->lnum_orig <= dp->df_lnum[idx_orig] + dp->df_count[idx_orig])
&& (hunk->lnum_orig + hunk->count_orig >= dp->df_lnum[idx_orig])) {
&& (hunk.lnum_orig <= dp->df_lnum[idx_orig] + dp->df_count[idx_orig])
&& (hunk.lnum_orig + hunk.count_orig >= dp->df_lnum[idx_orig])) {
// New block overlaps with existing block(s).
// First find last block that overlaps.
diff_T *dpl;
for (dpl = dp; dpl->df_next != NULL; dpl = dpl->df_next) {
if (hunk->lnum_orig + hunk->count_orig < dpl->df_next->df_lnum[idx_orig]) {
if (hunk.lnum_orig + hunk.count_orig < dpl->df_next->df_lnum[idx_orig]) {
break;
}
}
// If the newly found block starts before the old one, set the
// start back a number of lines.
linenr_T off = dp->df_lnum[idx_orig] - hunk->lnum_orig;
linenr_T off = dp->df_lnum[idx_orig] - hunk.lnum_orig;
if (off > 0) {
for (int i = idx_orig; i < idx_new; i++) {
@@ -1659,15 +1656,15 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
dp->df_lnum[i] -= off;
}
}
dp->df_lnum[idx_new] = hunk->lnum_new;
dp->df_count[idx_new] = (linenr_T)hunk->count_new;
dp->df_lnum[idx_new] = hunk.lnum_new;
dp->df_count[idx_new] = (linenr_T)hunk.count_new;
} else if (notset) {
// new block inside existing one, adjust new block
dp->df_lnum[idx_new] = hunk->lnum_new + off;
dp->df_count[idx_new] = (linenr_T)hunk->count_new - off;
dp->df_lnum[idx_new] = hunk.lnum_new + off;
dp->df_count[idx_new] = (linenr_T)hunk.count_new - off;
} else {
// second overlap of new block with existing block
dp->df_count[idx_new] += (linenr_T)hunk->count_new - (linenr_T)hunk->count_orig
dp->df_count[idx_new] += (linenr_T)hunk.count_new - (linenr_T)hunk.count_orig
+ dpl->df_lnum[idx_orig] +
dpl->df_count[idx_orig]
- (dp->df_lnum[idx_orig] +
@@ -1676,7 +1673,7 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
// Adjust the size of the block to include all the lines to the
// end of the existing block or the new diff, whatever ends last.
off = (hunk->lnum_orig + (linenr_T)hunk->count_orig)
off = (hunk.lnum_orig + (linenr_T)hunk.count_orig)
- (dpl->df_lnum[idx_orig] + dpl->df_count[idx_orig]);
if (off < 0) {
@@ -1708,10 +1705,10 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
// Allocate a new diffblock.
dp = diff_alloc_new(curtab, dprev, dp);
dp->df_lnum[idx_orig] = hunk->lnum_orig;
dp->df_count[idx_orig] = (linenr_T)hunk->count_orig;
dp->df_lnum[idx_new] = hunk->lnum_new;
dp->df_count[idx_new] = (linenr_T)hunk->count_new;
dp->df_lnum[idx_orig] = hunk.lnum_orig;
dp->df_count[idx_orig] = (linenr_T)hunk.count_orig;
dp->df_lnum[idx_new] = hunk.lnum_new;
dp->df_count[idx_new] = (linenr_T)hunk.count_new;
// Set values for other buffers, these must be equal to the
// original buffer, otherwise there would have been a change
@@ -1735,10 +1732,6 @@ static void diff_read(int idx_orig, int idx_new, diffio_T *dio)
notset = true;
}
if (!dio->dio_internal) {
xfree(hunk);
}
if (fd != NULL) {
fclose(fd);
}
@@ -3155,13 +3148,11 @@ static int parse_diff_unified(char *line, diffhunk_T *hunk)
static int xdiff_out(long start_a, long count_a, long start_b, long count_b, void *priv)
{
diffout_T *dout = (diffout_T *)priv;
diffhunk_T *p = xmalloc(sizeof(*p));
ga_grow(&dout->dout_ga, 1);
p->lnum_orig = (linenr_T)start_a + 1;
p->count_orig = count_a;
p->lnum_new = (linenr_T)start_b + 1;
p->count_new = count_b;
((diffhunk_T **)dout->dout_ga.ga_data)[dout->dout_ga.ga_len++] = p;
GA_APPEND(diffhunk_T, &(dout->dout_ga), ((diffhunk_T){
.lnum_orig = (linenr_T)start_a + 1,
.count_orig = count_a,
.lnum_new = (linenr_T)start_b + 1,
.count_new = count_b,
}));
return 0;
}