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some memory check before accessing

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This commit is contained in:
Anshul Maheshwari 2014-07-11 13:13:48 -07:00
parent cc0a786004
commit a5ef2d1574
1 changed files with 23 additions and 5 deletions
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28
src/608.c
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@ -487,9 +487,16 @@ int write_cc_buffer(struct s_context_cc608 *context)
{
sub =
context->sub = malloc(sizeof(struct cc_subtitle));
memset(context->sub, 0, sizeof(struct cc_subtitle));
}
else
sub = context->sub;
if (!sub)
{
mprint("No Memory Left");
return 0;
}
if (ccx_options.screens_to_process!=-1 &&
context->screenfuls_counter >= ccx_options.screens_to_process)
{
@ -512,11 +519,16 @@ int write_cc_buffer(struct s_context_cc608 *context)
if (!data->empty)
{
sub->data = (struct eia608_screen *) realloc(sub->data,sub->size + sizeof(*data));
sub->data = (struct eia608_screen *) realloc(sub->data,sub->size + sizeof(*data));
if (!sub->data)
{
mprint("No Memory left");
return 0;
}
memcpy((struct eia608_screen *)sub->data + (sub->size/sizeof(*data)), data, sizeof(*data));
sub->size += sizeof(*data);
wrote_something = 1;
memcpy(((struct eia608_screen *)sub->data) + (sub->size/sizeof(*data)), data, sizeof(*data));
sub->size += sizeof(*data);
wrote_something = 1;
if(start_time < end_time)
{
int i = 0;
@ -539,7 +551,7 @@ int write_cc_buffer(struct s_context_cc608 *context)
}
for(data = sub->data; sub->size ; sub->size -= sizeof(struct eia608_screen))
{
if(!data->start_time)
if(!data || !data->start_time)
break;
new_sentence=1;
switch (ccx_options.write_format)
@ -574,7 +586,13 @@ int write_cc_buffer(struct s_context_cc608 *context)
if (ccx_options.gui_mode_reports)
write_cc_buffer_to_gui(data, context);
data = (struct eia608_screen*)sub->data + 1;
if (sub->data && !sub->size)
{
free(sub->data);
sub->data = NULL;
}
}
return wrote_something;
}