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fix a severe bug in vector extension logic

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Lephenixnoir 2021-05-13 14:07:12 +02:00
parent 87d6d4eea4
commit cd4e3969bd
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GPG key ID: 1BBA026E13FC0495
3 changed files with 7 additions and 5 deletions
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1
src/jlabel.c
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@ -28,6 +28,7 @@ jlabel *jlabel_create(char const *text, void *parent)
l->color = C_BLACK; l->color = C_BLACK;
l->font = NULL; l->font = NULL;
l->wrap_mode = J_WRAP_NONE;
l->text = text; l->text = text;
l->owns_text = false; l->owns_text = false;

9
src/vec.c
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@ -24,21 +24,22 @@ bool vec_add(vec_t *v, size_t n)
/* Allocate either size/2 new elements or 4 elements */ /* Allocate either size/2 new elements or 4 elements */
size_t ext = max(v->size / 2, 4); size_t ext = max(v->size / 2, 4);
/* Make sure that no more than 255 free elements will remain */ /* Make sure that no more than 255 free elements will remain */
if(v->size + v->free + ext > n + 255) if(v->free + ext > n + 255)
ext = (n + 255) - (v->size + v->free); ext = (n + 255) - v->free;
size_t newsize = v->size + v->free + ext; size_t newsize = v->size + v->free + ext;
void *newdata = realloc(v->data, newsize * v->elsize); void *newdata = realloc(v->data, newsize * v->elsize);
if(!newdata) return false; if(!newdata) return false;
v->data = newdata; v->data = newdata;
v->free = newsize - n; v->free = newsize - v->size - n;
v->size += n;
} }
else { else {
v->free -= n; v->free -= n;
v->size += n;
} }
v->size += n;
return true; return true;
} }