/*
 * FileList ADT - a dynamic list of C filenames
 */
struct FileList_
{
    char **files;
    int size;
    int capacity;
};
typedef struct FileList_ *FileList;

static FileList
FileList_new(int capacity)
{
    FileList fl = NEW_(FileList);
    fl->capacity = capacity;
    fl->files = (char **) JLI_MemAlloc(capacity * sizeof(fl->files[0]));
    fl->size = 0;
    return fl;
}

#ifdef DEBUG_WILDCARD
static void
FileList_print(FileList fl)
{
    int i;
    putchar('[');
    for (i = 0; i < fl->size; i++) {
	if (i > 0) printf(", ");
	printf("\"%s\"",fl->files[i]);
    }
    putchar(']');
}
#endif

static void
FileList_free(FileList fl)
{
    if (fl) {
	if (fl->files) {
	    int i;
	    for (i = 0; i < fl->size; i++)
		JLI_MemFree(fl->files[i]);
	    JLI_MemFree(fl->files);
	}
	JLI_MemFree(fl);
    }
}

static void
FileList_ensureCapacity(FileList fl, int capacity)
{
    if (fl->capacity < capacity) {
	while (fl->capacity < capacity)
	    fl->capacity *= 2;
	fl->files = JLI_MemRealloc(fl->files,
			       fl->capacity * sizeof(fl->files[0]));
    }
}

static void
FileList_add(FileList fl, char *file)
{
    FileList_ensureCapacity(fl, fl->size+1);
    fl->files[fl->size++] = file;
}

static void
FileList_addSubstring(FileList fl, const char *beg, int len)
{
    char *filename = (char *) JLI_MemAlloc(len+1);
    memcpy(filename, beg, len);
    filename[len] = '\0';
    FileList_ensureCapacity(fl, fl->size+1);
    fl->files[fl->size++] = filename;
}

static char *
FileList_join(FileList fl, char sep)
{
    int i;
    int size;
    char *path;
    char *p;
    for (i = 0, size = 1; i < fl->size; i++)
	size += strlen(fl->files[i]) + 1;

    path = JLI_MemAlloc(size);

    for (i = 0, p = path; i < fl->size; i++) {
	int len = strlen(fl->files[i]);
	if (i > 0) *p++ = sep;
	memcpy(p, fl->files[i], len);
	p += len;
    }
    *p = '\0';

    return path;
}