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#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "mpq-fs.h"
#define MAX_FNAME 2048
typedef struct directory_list_t {
struct directory_list_t * child;
char * name;
struct mpq_archive_t * mpq_a;
int entry;
struct directory_list_t * next;
} directory_list;
static directory_list root_dir = {
NULL, "", NULL, -1, NULL
};
static directory_list * root = &root_dir;
static char * strtoupper(char * _str) {
char * str = _str;
while (*str) {
*str = toupper(*str);
str++;
}
return _str;
}
/*
* The 'new' keyword is abusive: the function returns an existing entry if it matches, allowing overrites.
*/
static directory_list * new_directory_list(directory_list * parent, struct mpq_archive_t * mpq_a, const char * name) {
directory_list * r;
for (r = parent->child; r; r = r->next) {
if (!strcasecmp(r->name, name))
break;
}
if (!r) {
r = (directory_list *) malloc(sizeof(directory_list));
r->child = NULL;
r->next = parent->child;
parent->child = r;
r->name = strtoupper(strdup(name));
}
r->mpq_a = mpq_a;
r->entry = -1;
return r;
}
/*
* Recursively adds a new entry into our directory structure.
*/
static directory_list * add_file_r(directory_list * parent, struct mpq_archive_t * mpq_a, char * fname, int entry) {
char * bs;
directory_list * r;
int tail = 0;
bs = strchr(fname, '\\');
if (bs) {
*bs = 0;
} else {
tail = 1;
}
if (!(r = new_directory_list(parent, mpq_a, fname)))
return NULL;
if (tail) {
r->entry = entry;
return r;
}
return add_file_r(r, mpq_a, bs + 1, entry);
}
static directory_list * add_file(struct mpq_archive_t * mpq_a, char * fname) {
int entry;
if ((entry = mpqlib_find_hash_entry_by_name(mpq_a, fname, 0, 0)) < 0)
return NULL;
return add_file_r(root, mpq_a, fname, entry);
}
/*
* Adds an opened archive file into the system, and try to automagically import the list file.
*/
void mpqlib_fs_add_archive(struct mpq_archive_t * mpq_a) {
struct mpq_file_t * listfile;
char * buffer;
int s;
if (!(listfile = mpqlib_open_filename(mpq_a, "(listfile)")))
return;
s = mpqlib_seek(listfile, 0, MPQLIB_SEEK_END);
mpqlib_seek(listfile, 0, MPQLIB_SEEK_SET);
if (!(buffer = (char *) malloc(s + 1))) {
mpqlib_close(listfile);
return;
}
buffer[s] = 0;
mpqlib_read(listfile, buffer, s);
mpqlib_fs_attach_listfile(mpq_a, buffer);
free(buffer);
mpqlib_close(listfile);
}
/*
* Generalistic function to add an archive to the directory structure using a custom listfile.
*/
void mpqlib_fs_attach_listfile(struct mpq_archive_t * mpq_a, const char * listfile) {
char fname[MAX_FNAME];
const char * p;
char * fnp;
for (p = listfile, fnp = fname; *p; p++) {
switch (*p) {
/* Each entry in the listfile may be separated by CR, LF, and/or ';'. */
case '\r':
case '\n':
case ';':
*fnp = 0;
if (fnp != fname)
add_file(mpq_a, fname);
fnp = fname;
break;
default:
*(fnp++) = *p;
break;
}
}
}
/*
* Recursively find a file.
*/
static directory_list * find_file_r(directory_list * parent, char * fname) {
char * bs;
directory_list * r;
int tail = 0;
bs = strchr(fname, '\\');
if (bs) {
*bs = 0;
} else {
tail = 1;
}
for (r = parent->child; r; r = r->next) {
if (!strcmp(fname, r->name)) {
if (tail) {
return r;
} else {
return find_file_r(r, bs + 1);
}
}
}
return NULL;
}
static directory_list * find_file(char * fname) {
return find_file_r(root, fname);
}
struct mpq_file_t * mpqlib_fs_open(const char * _fname) {
char * fname = strtoupper(strdup(_fname));
directory_list * entry;
entry = find_file(fname);
free(fname);
if (entry) {
return mpqlib_open_file(entry->mpq_a, entry->entry);
}
return NULL;
}
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