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bar: use calloc() instead of malloc()

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In cases where it makes sense, use calloc() instead of malloc():

* When allocating large objects with many members, many for which
  NULL/0 is a good default value.
* Arrays etc where we explicitly initialize to NULL anyway.
This commit is contained in:
Daniel Eklöf 2019-02-09 10:55:42 +01:00
parent ad3a33cf3d
commit 83591b9269
1 changed files with 8 additions and 15 deletions
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23
bar/bar.c
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@ -367,7 +367,7 @@ destroy(struct bar *bar)
struct bar *
bar_new(const struct bar_config *config)
{
struct private *priv = malloc(sizeof(*priv));
struct private *priv = calloc(1, sizeof(*priv));
priv->monitor = config->monitor != NULL ? strdup(config->monitor) : NULL;
priv->location = config->location;
priv->height = config->height;
@ -379,15 +379,14 @@ bar_new(const struct bar_config *config)
priv->border.width = config->border.width;
priv->border.color = config->border.color;
priv->left.mods = malloc(config->left.count * sizeof(priv->left.mods[0]));
priv->left.exps = malloc(config->left.count * sizeof(priv->left.exps[0]));
priv->left.exps = calloc(config->left.count, sizeof(priv->left.exps[0]));
priv->center.mods = malloc(config->center.count * sizeof(priv->center.mods[0]));
priv->center.exps = malloc(config->center.count * sizeof(priv->center.exps[0]));
priv->center.exps = calloc(config->center.count, sizeof(priv->center.exps[0]));
priv->right.mods = malloc(config->right.count * sizeof(priv->right.mods[0]));
priv->right.exps = malloc(config->right.count * sizeof(priv->right.exps[0]));
priv->right.exps = calloc(config->right.count, sizeof(priv->right.exps[0]));
priv->left.count = config->left.count;
priv->center.count = config->center.count;
priv->right.count = config->right.count;
priv->cursor_name = NULL;
#if defined(ENABLE_X11) && !defined(ENABLE_WAYLAND)
priv->backend.data = bar_backend_xcb_new();
@ -407,20 +406,14 @@ bar_new(const struct bar_config *config)
#endif
#endif
for (size_t i = 0; i < priv->left.count; i++) {
for (size_t i = 0; i < priv->left.count; i++)
priv->left.mods[i] = config->left.mods[i];
priv->left.exps[i] = NULL;
}
for (size_t i = 0; i < priv->center.count; i++) {
for (size_t i = 0; i < priv->center.count; i++)
priv->center.mods[i] = config->center.mods[i];
priv->center.exps[i] = NULL;
}
for (size_t i = 0; i < priv->right.count; i++) {
for (size_t i = 0; i < priv->right.count; i++)
priv->right.mods[i] = config->right.mods[i];
priv->right.exps[i] = NULL;
}
struct bar *bar = malloc(sizeof(*bar));
struct bar *bar = calloc(1, sizeof(*bar));
bar->private = priv;
bar->run = &run;
bar->destroy = &destroy;