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grid: reflow: qsort_r() is not portable

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Replace with qsort() + global variable. Not thread safe!
This commit is contained in:
Daniel Eklöf 2021-05-15 13:37:46 +02:00
parent aa1f589e3f
commit 8d1b724056
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GPG key ID: 5BBD4992C116573F
1 changed files with 15 additions and 11 deletions
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26
grid.c
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@ -385,25 +385,27 @@ _line_wrap(struct grid *old_grid, struct row **new_grid, struct row *row,
return new_row;
}
struct tp_cmp_ctx {
static struct {
int scrollback_start;
int rows;
};
} tp_cmp_ctx;
static int
tp_cmp(const void *_a, const void *_b, void *_arg)
tp_cmp(const void *_a, const void *_b)
{
const struct coord *a = *(const struct coord **)_a;
const struct coord *b = *(const struct coord **)_b;
const struct tp_cmp_ctx *ctx = _arg;
int a_row = (a->row - ctx->scrollback_start + ctx->rows) & (ctx->rows - 1);
int b_row = (b->row - ctx->scrollback_start + ctx->rows) & (ctx->rows - 1);
int scrollback_start = tp_cmp_ctx.scrollback_start;
int num_rows = tp_cmp_ctx.rows;
int a_row = (a->row - scrollback_start + num_rows) & (num_rows - 1);
int b_row = (b->row - scrollback_start + num_rows) & (num_rows - 1);
xassert(a_row >= 0);
xassert(a_row < ctx->rows || ctx->rows == 0);
xassert(a_row < num_rows || num_rows == 0);
xassert(b_row >= 0);
xassert(b_row < ctx->rows || ctx->rows == 0);
xassert(b_row < num_rows || num_rows == 0);
if (a_row < b_row)
return -1;
@ -486,9 +488,11 @@ grid_resize_and_reflow(
if (!view_follows)
tracking_points[tracking_points_count + 2] = &viewport;
qsort_r(
tracking_points, tp_count - 1, sizeof(tracking_points[0]), &tp_cmp,
&(struct tp_cmp_ctx){.scrollback_start = offset, .rows = old_rows});
/* Not thread safe! */
tp_cmp_ctx.scrollback_start = offset;
tp_cmp_ctx.rows = old_rows;
qsort(
tracking_points, tp_count - 1, sizeof(tracking_points[0]), &tp_cmp);
/* NULL terminate */
struct coord terminator = {-1, -1};