ccc/file.c

89 lines
1.4 KiB
C

#include <string.h>
#include "util.h"
// files in a link list data structure
typedef struct file {
char *name;
// put some more useful stat here
struct file *next;
} file;
file *files = NULL;
/*
* get length of files linked list
*/
long files_len()
{
file *current = files;
int count = 0;
while (current != NULL)
{
count++;
current = current->next;
}
return count;
}
long add_file(char *filename)
{
file *current = files;
file *new_file = memalloc(sizeof(file));
char *buf = strdup(filename);
if (!buf)
{
perror("ccc");
}
new_file->name = buf;
new_file->next = NULL;
if (current == NULL)
{
files = new_file;
return 0;
}
long index = 1;
while (current->next != NULL)
{
current = current->next;
index++;
}
current->next = new_file;
return index;
}
file *get_file(long index)
{
file *current = files;
if (index == 0)
{
return current;
}
if (index > files_len())
{
return NULL;
}
for (long i = 0; i < index; i++)
{
current = current->next;
}
return current;
}
char *get_filename(long index)
{
file *file = get_file(index);
if (file != NULL)
{
char *name = strdup(file->name);
if (!name)
{
perror("ccc");
}
return name;
}
else
{
return NULL;
}
}