/**
* Writes a given LuciStringObj to a LuciFileObj.
*
* @param args list of args
* @param c number of args
* @returns LuciNilObj
*/
LuciObject *luci_fwrite(LuciObject **args, unsigned int c)
{
if (c < 2) {
LUCI_DIE("%s", "Missing parameter to write()\n");
}
/* grab the FILE parameter */
LuciObject *fobj = args[0];
if (!fobj || (!ISTYPE(fobj, obj_file_t))) {
LUCI_DIE("%s", "Not a file object\n");
}
/* grab string parameter */
LuciObject *text_obj = args[1];
if (!text_obj || (!ISTYPE(text_obj, obj_string_t)) ) {
LUCI_DIE("%s", "Not a string\n");
}
char *text = AS_STRING(text_obj)->s;
if (AS_FILE(fobj)->mode == f_read_m) {
LUCI_DIE("%s", "Can't write to It is opened for reading.\n");
}
fwrite(text, sizeof(char), strlen(text), AS_FILE(fobj)->ptr);
return LuciNilObj;
}
Folder* folder_open(FileSystem *fs, Inode *inode) {
Folder *folder = NULL;
char *buffer = NULL;
int offset = 0;
int i = 0;
folder = (Folder *) malloc(sizeof(Folder));
file_init(AS_FILE(folder), fs, inode);
buffer = (char *) malloc(inode->filesize);
file_get_contents(AS_FILE(folder), buffer);
#ifdef DEBUG
fprintf(stderr, "folder_open buffer=");
for (i = 0; i < inode->filesize; ++i) fprintf(stderr, " %x", buffer[i]);
fprintf(stderr, "\n");
#endif
folder->nitem = util_readint(buffer, 0);
#ifdef DEBUG
fprintf(stderr, "folder_open, folder->nitem=%d\n", folder->nitem);
#endif
folder->items = (FolderItem *) malloc(sizeof(FolderItem) * folder->nitem);
offset = 4;
for (i = 0; i < folder->nitem; ++i) {
int cname_len = 0;
cname_len = util_readint(buffer, offset);
offset += 4;
memcpy(folder->items[i].cname, buffer + offset, cname_len);
folder->items[i].cname[cname_len] = 0; // make it a string
offset += cname_len;
folder->items[i].page_num = util_readint(buffer, offset);
offset += 4;
}
free(buffer);
return folder;
}
/**
* Copies a LuciFileObj
*
* Marks the copy's 'iscopy' flag to ensure garbage collection
* never closes a FILE* that is supposed to be open
*
* @param o LuciFileObj to copy
* @returns copy of LuciFileObj
*/
LuciObject *LuciFile_copy(LuciObject *o)
{
LuciFileObj *f = AS_FILE(o);
LuciObject *copy = LuciFile_new(f->ptr, f->size, f->mode);
AS_FILE(copy)->iscopy = true; /* prevent garbage collector from closing this file */
return copy;
}
/**
* Reads the contents of a file into a LuciStringObj.
*
* @param args list of args
* @param c number of args
* @returns contents of the file from the first arg.
*/
LuciObject *luci_fread(LuciObject **args, unsigned int c)
{
if (c < 1) {
LUCI_DIE("%s", "Missing parameter to read()\n");
}
LuciObject *fobj = args[0];
if (!ISTYPE(fobj, obj_file_t)) {
LUCI_DIE("%s", "Not a file object\n");
}
if (AS_FILE(fobj)->mode != f_read_m) {
LUCI_DIE("%s", "Can't open It is opened for writing.\n");
}
/* seek to file start, we're gonna read the whole thing */
/* fseek(fobj->ptr, 0, SEEK_SET); */
long len = AS_FILE(fobj)->size;
char *read = alloc(len + 1);
fread(read, sizeof(char), len, AS_FILE(fobj)->ptr);
read[len] = '\0';
/* fseek(fobj->ptr, 0, SEEK_SET); */
LuciObject *ret = LuciString_new(read);
return ret;
}
/**
* Asserts that a given LuciObject is equivalent to a boolean True
*
* Currently uses C @code assert @endcode , which will exit a program
* mid-execution if the assertion fails.
*
* @param args list of args
* @param c number of args
* @returns LuciNilObj
*/
LuciObject *luci_assert(LuciObject **args, unsigned int c)
{
if (c < 1) {
LUCI_DIE("%s", "Missing condition parameter to assert()\n");
}
LuciObject *item = args[0];
if (ISTYPE(item, obj_int_t) && !AS_INT(item)->i) {
LUCI_DIE("%s\n", "Assertion failed");
} else if (ISTYPE(item, obj_float_t) && !((long)AS_FLOAT(item)->f)) {
LUCI_DIE("%s\n", "Float assertion failed");
} else if (ISTYPE(item, obj_string_t)) {
if (strcmp("", AS_STRING(item)->s) == 0) {
LUCI_DIE("%s\n", "String assertion failed");
}
} else if (ISTYPE(item, obj_list_t) && (AS_LIST(item)->count == 0)) {
LUCI_DIE("%s\n", "List assertion failed");
} else if (ISTYPE(item, obj_map_t) && (AS_MAP(item)->count == 0)) {
LUCI_DIE("%s\n", "Map assertion failed");
} else if (ISTYPE(item, obj_file_t) && (AS_FILE(item)->ptr)) {
LUCI_DIE("%s\n", "File assertion failed");
}
return LuciNilObj;
}
/**
* Finalizes a LuciFileObj
*
* Closes it's internal C FILE* only if it is not a copy of
* the original LuciFileObj
*
* @param in LuciFileObj
*/
void LuciFile_finalize(LuciObject *in)
{
LuciFileObj *f = AS_FILE(in);
if (!f->iscopy) {
fclose(f->ptr);
}
}
/**
* Returns a boolean representation of a LuciFileObj
*
* true if the file pointer is not NULL
*
* @returns LuciIntObj
*/
LuciObject* LuciFile_asbool(LuciObject *o)
{
LuciObject *res = LuciNilObj;
if (AS_FILE(o)->ptr) {
res = LuciInt_new(true);
} else {
res = LuciInt_new(false);
}
return res;
}
/**
* Closes an open LuciFileObj.
*
* @param args list of args
* @param c number of args
* @returns LuciNilObj
*/
LuciObject *luci_fclose(LuciObject **args, unsigned int c)
{
if (c < 1) {
LUCI_DIE("%s", "Missing parameter to close()\n");
}
LuciObject *fobj = args[0];
if (!ISTYPE(fobj, obj_file_t)) {
LUCI_DIE("%s", "Not a file object\n");
}
if (AS_FILE(fobj)->ptr) {
close_file(AS_FILE(fobj)->ptr);
}
/* else, probably already closed (it's NULL) */
LUCI_DEBUG("%s\n", "Closed file object.");
return LuciNilObj;
}
/**
* Reads a line of input from stdin
*
* @param args first arg is either NULL or a LuciFileObj
* @param c if 0, read from stdin. if > 0, read from file.
* @returns LuciStringObj containing what was read
*/
LuciObject *luci_readline(LuciObject **args, unsigned int c)
{
size_t lenmax = 64, len = 0;
int ch;
FILE *read_from = NULL;
char *input;
if (c < 1) {
LUCI_DEBUG("%s\n", "readline from stdin");
read_from = stdin;
}
else {
LuciObject *item = args[0];
if (item && (ISTYPE(item, obj_file_t))) {
LUCI_DEBUG("%s\n", "readline from file");
read_from = AS_FILE(item)->ptr;
}
else {
LUCI_DIE("args[0]: %p, type: %s\n", args[0], item->type->type_name);
LUCI_DIE("%s", "Can't readline from non-file object\n");
}
}
input = alloc(lenmax * sizeof(char));
if (input == NULL) {
LUCI_DIE("%s", "Failed to allocate buffer for reading stdin\n");
}
do {
ch = fgetc(read_from);
if (len >= lenmax) {
lenmax *= 2;
if ((input = realloc(input, lenmax * sizeof(char))) == NULL) {
LUCI_DIE("%s", "Failed to allocate buffer for reading\n");
}
}
input[len++] = (char)ch;
} while (ch != EOF && ch != '\n');
if (ch == EOF) {
LUCI_DEBUG("%s\n", "readline at EOF, returning nil");
return LuciNilObj;
}
/* overwrite the newline or EOF char with a NUL terminator */
input[--len] = '\0';
LuciObject *ret = LuciString_new(input);
LUCI_DEBUG("Read line %s\n", AS_STRING(ret)->s);
return ret;
}
/**
* Prints a representation of a LuciFileObj to stdout
*
* @param in LuciFileObj to print
*/
void LuciFile_print(LuciObject *in)
{
switch (AS_FILE(in)->mode) {
case f_read_m:
printf("<file 'r'>");
break;
case f_write_m:
printf("<file 'w'>");
break;
case f_append_m:
printf("<file 'a'>");
break;
default:
break;
}
}
void folder_close(Folder **folder) {
if (folder && *folder) {
int len = 0;
int i = 0;
char *buffer = NULL;
int offset = 0;
len = 4;
for (i = 0; i < (*folder)->nitem; ++i) {
len += 4;
len += strlen((*folder)->items[i].cname);
len += 4;
}
buffer = (char *) malloc(len);
util_writeint(buffer, 0, (*folder)->nitem);
#ifdef DEBUG
fprintf(stderr, "folder_close, (*folder)->nitem=%d\n", (*folder)->nitem);
#endif
offset = 4;
for (i = 0; i < (*folder)->nitem; ++i) {
int cname_len = 0;
cname_len = (int) strlen((*folder)->items[i].cname);
util_writeint(buffer, offset, cname_len);
offset += 4;
memcpy(buffer + offset, (*folder)->items[i].cname, cname_len);
offset += cname_len;
util_writeint(buffer, offset, (*folder)->items[i].page_num);
offset += 4;
}
#ifdef DEBUG
fprintf(stderr, "offset=%d, len=%d\n", offset, len);
fprintf(stderr, "folder_close buffer=");
for (i = 0; i < len; ++i) fprintf(stderr, " %x", buffer[i]);
fprintf(stderr, "\n");
#endif
file_put_contents(AS_FILE(*folder), buffer, len);
free(buffer);
free((*folder)->items);
free(*folder);
*folder = NULL;
}
}
int fs_mkdir(FileSystem *fs, const char *d) {
int p = 0;
Inode *inode = NULL;
Folder *fd = NULL;
char ppath[4096] = "";
char cname[4096] = "";
Folder *pfd = NULL;
int parent_page_num = 0;
p = freelist_allocate(fs->freelist);
if (p <= 1) return ERROR;
inode = inode_new(p);
if (!inode) return ERROR;
inode->type = INODE_FOLDER;
inode->filesize = 0;
inode->lastmod = time(NULL);
inode->firstpage = 0;
fs_save_inode(fs, inode);
inode_free(&inode);
fs_split_path(d, ppath, cname);
#ifdef DEBUG
fprintf(stderr, "fs_mkdir, d=`%s`, ppath=`%s`, cname=`%s`\n", d, ppath, cname);
#endif
pfd = folder_open(fs, folder_lookup(fs, fs->cur, ppath));
parent_page_num = AS_FILE(pfd)->inode->page_num;
folder_add_child(pfd, cname, p);
folder_close(&pfd);
fd = folder_open(fs, fs_load_inode(fs, p));
fs_split_path(d, ppath, cname);
folder_add_child(fd, "", ROOT_PAGE_NUM());
folder_add_child(fd, ".", p);
folder_add_child(fd, "..", parent_page_num);
folder_close(&fd);
return OK;
}
/**
* Produces a LuciStringObj representation of a LuciFileObj
*
* @param o LuciFileObj to represent
* @returns LuciStringObj representation of o
*/
LuciObject *LuciFile_repr(LuciObject *o)
{
char *s = alloc(32);
snprintf(s, 32, "file @ %p", AS_FILE(o)->ptr);
return LuciString_new(s);
}
/**
* Returns the size of a LuciFileObj in bytes
*
* @param o LuciFileObj
* @returns LuciIntObj size of file in bytes
*/
LuciObject* LuciFile_len(LuciObject *o)
{
return LuciInt_new(AS_FILE(o)->size);
}
