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[cairo-spline] Clean-up realloc algorithm for clarity

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This commit is contained in:
Behdad Esfahbod 2007-03-08 22:17:30 -05:00
parent cee687a33f
commit 1e64ecf075
1 changed files with 7 additions and 10 deletions
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17
src/cairo-spline.c
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@ -37,7 +37,7 @@
#include "cairoint.h"
static cairo_status_t
_cairo_spline_grow_by (cairo_spline_t *spline, int additional);
_cairo_spline_grow (cairo_spline_t *spline);
static cairo_status_t
_cairo_spline_add_point (cairo_spline_t *spline, cairo_point_t *point);
@ -97,24 +97,22 @@ _cairo_spline_fini (cairo_spline_t *spline)
}
static cairo_status_t
_cairo_spline_grow_by (cairo_spline_t *spline, int additional)
_cairo_spline_grow (cairo_spline_t *spline)
{
cairo_point_t *new_points;
int old_size = spline->points_size;
int new_size = spline->num_points + additional;
int new_size = old_size ? 2 * old_size : 32;
if (new_size <= spline->points_size)
return CAIRO_STATUS_SUCCESS;
assert (spline->num_points <= spline->points_size);
spline->points_size = new_size;
new_points = realloc (spline->points, spline->points_size * sizeof (cairo_point_t));
new_points = realloc (spline->points, new_size * sizeof (cairo_point_t));
if (new_points == NULL) {
spline->points_size = old_size;
return CAIRO_STATUS_NO_MEMORY;
}
spline->points = new_points;
spline->points_size = new_size;
return CAIRO_STATUS_SUCCESS;
}
@ -132,8 +130,7 @@ _cairo_spline_add_point (cairo_spline_t *spline, cairo_point_t *point)
}
if (spline->num_points >= spline->points_size) {
int additional = spline->points_size ? spline->points_size : 32;
status = _cairo_spline_grow_by (spline, additional);
status = _cairo_spline_grow (spline);
if (status)
return status;
}