ccc/file.c

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C
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#include <string.h>
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#include <stdlib.h>
#include "util.h"
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/* files in a link list data structure */
typedef struct file {
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char *name;
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char *stats;
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/* 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;
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while (current != NULL) {
count++;
current = current->next;
}
return count;
}
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long add_file(char *filename, char *stats)
{
file *current = files;
file *new_file = memalloc(sizeof(file));
char *buf = strdup(filename);
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char *buf2 = strdup(stats);
if (buf == NULL || buf2 == NULL) {
perror("ccc");
}
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new_file->name = buf;
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new_file->stats = buf2;
new_file->next = NULL;
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if (current == NULL) {
files = new_file;
return 0;
}
long index = 1;
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while (current->next != NULL) {
current = current->next;
index++;
}
current->next = new_file;
return index;
}
file *get_file(long index)
{
file *current = files;
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if (index == 0) {
return current;
}
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if (index > files_len()) {
return NULL;
}
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for (long i = 0; i < index; i++) {
current = current->next;
}
return current;
}
char *get_filename(long index)
{
file *file = get_file(index);
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if (file != NULL) {
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char *name = strdup(file->name);
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if (!name) {
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perror("ccc");
}
return name;
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} else {
return NULL;
}
}
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char *get_line(long index)
{
file *file = get_file(index);
if (file != NULL) {
char *name = strdup(file->name);
char *stats = strdup(file->stats);
if (name == NULL || stats == NULL) {
perror("ccc");
}
size_t length = strlen(name) + strlen(stats) + 2; /* one for space and one for nul */
char *line = memalloc(length * sizeof(char));
snprintf(line, length, "%s %s", stats, name);
return line;
} else {
return NULL;
}
}