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quakeforge/libs/ruamoko/rua_qfile.c

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/*
bi_file.c
CSQC file builtins
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/dstring.h"
#include "QF/progs.h"
#include "QF/quakeio.h"
#include "rua_internal.h"
typedef struct qfile_s {
struct qfile_s *next;
struct qfile_s **prev;
QFile *file;
} qfile_t;
typedef struct {
PR_RESMAP (qfile_t) handle_map;
qfile_t *handles;
} qfile_resources_t;
static qfile_t *
handle_new (qfile_resources_t *res)
{
return PR_RESNEW (res->handle_map);
}
static void
handle_free (qfile_resources_t *res, qfile_t *handle)
{
PR_RESFREE (res->handle_map, handle);
}
static void
handle_reset (qfile_resources_t *res)
{
PR_RESRESET (res->handle_map);
}
static inline qfile_t *
handle_get (qfile_resources_t *res, int index)
{
return PR_RESGET(res->handle_map, index);
}
static inline int __attribute__((pure))
handle_index (qfile_resources_t *res, qfile_t *handle)
{
return PR_RESINDEX(res->handle_map, handle);
}
static void
bi_qfile_clear (progs_t *pr, void *data)
{
qfile_resources_t *res = (qfile_resources_t *) data;
qfile_t *handle;
for (handle = res->handles; handle; handle = handle->next)
Qclose (handle->file);
res->handles = 0;
handle_reset (res);
}
static int
alloc_handle (qfile_resources_t *res, QFile *file)
{
qfile_t *handle = handle_new (res);
if (!handle)
return 0;
handle->next = res->handles;
handle->prev = &res->handles;
if (res->handles)
res->handles->prev = &handle->next;
res->handles = handle;
handle->file = file;
return handle_index (res, handle);
}
int
QFile_AllocHandle (progs_t *pr, QFile *file)
{
qfile_resources_t *res = PR_Resources_Find (pr, "QFile");
return alloc_handle (res, file);
}
static void
secured (progs_t *pr)
{
PR_RunError (pr, "Secured function called");
}
static void
bi_Qrename (progs_t *pr)
{
const char *old = P_GSTRING (pr, 0);
const char *new = P_GSTRING (pr, 1);
R_INT (pr) = Qrename (old, new);
}
static void
bi_Qremove (progs_t *pr)
{
const char *path = P_GSTRING (pr, 0);
R_INT (pr) = Qremove (path);
}
static void
bi_Qopen (progs_t *pr)
{
qfile_resources_t *res = PR_Resources_Find (pr, "QFile");
const char *path = P_GSTRING (pr, 0);
const char *mode = P_GSTRING (pr, 1);
QFile *file;
R_INT (pr) = 0;
if (!(file = Qopen (path, mode)))
return;
if (!(R_INT (pr) = alloc_handle (res, file)))
Qclose (file);
}
static qfile_t *
get_handle (progs_t *pr, const char *name, int handle)
{
qfile_resources_t *res = PR_Resources_Find (pr, "QFile");
qfile_t *h = handle_get (res, handle);
if (!h)
PR_RunError (pr, "invalid file handle passed to %s", name + 3);
return h;
}
QFile *
QFile_GetFile (progs_t *pr, int handle)
{
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
return h->file;
}
static void
bi_Qclose (progs_t *pr)
{
qfile_resources_t *res = PR_Resources_Find (pr, "QFile");
int handle = P_INT (pr, 0);
qfile_t *h = handle_get (res, handle);
if (!h)
PR_RunError (pr, "invalid file handle passed to Qclose");
Qclose (h->file);
*h->prev = h->next;
if (h->next)
h->next->prev = h->prev;
handle_free (res, h);
}
static void
bi_Qgetline (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
const char *s;
s = Qgetline (h->file);
if (s)
RETURN_STRING (pr, s);
else
R_STRING (pr) = 0;
}
static void
bi_Qreadstring (progs_t *pr)
{
int handle = P_INT (pr, 0);
int len = P_INT (pr, 1);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
string_t str = PR_NewMutableString (pr);
dstring_t *dstr = PR_GetMutableString (pr, str);
dstr->size = len + 1;
dstring_adjust (dstr);
len = Qread (h->file, dstr->str, len);
dstr->size = len + 1;
dstr->str[len] = 0;
R_STRING (pr) = str;
}
static void
check_buffer (progs_t *pr, pr_type_t *buf, int count, const char *name)
{
int len;
len = (count + sizeof (pr_type_t) - 1) / sizeof (pr_type_t);
if (buf < pr->pr_globals || buf + len > pr->pr_globals + pr->globals_size)
PR_RunError (pr, "%s: bad buffer", name);
}
static void
bi_Qread (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
pr_type_t *buf = P_GPOINTER (pr, 1);
int count = P_INT (pr, 2);
check_buffer (pr, buf, count, "Qread");
R_INT (pr) = Qread (h->file, buf, count);
}
static void
bi_Qwrite (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
pr_type_t *buf = P_GPOINTER (pr, 1);
int count = P_INT (pr, 2);
check_buffer (pr, buf, count, "Qwrite");
R_INT (pr) = Qwrite (h->file, buf, count);
}
static void
bi_Qputs (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
const char *str = P_GSTRING (pr, 1);
R_INT (pr) = Qputs (h->file, str);
}
#if 0
static void
bi_Qgets (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
pr_type_t *buf = P_GPOINTER (pr, 1);
int count = P_INT (pr, 2);
check_buffer (pr, buf, count, "Qgets");
RETURN_POINTER (pr, Qgets (h->file, (char *) buf, count));
}
#endif
static void
bi_Qgetc (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
R_INT (pr) = Qgetc (h->file);
}
static void
bi_Qputc (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
int c = P_INT (pr, 1);
R_INT (pr) = Qputc (h->file, c);
}
static void
bi_Qseek (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
int offset = P_INT (pr, 1);
int whence = P_INT (pr, 2);
R_INT (pr) = Qseek (h->file, offset, whence);
}
static void
bi_Qtell (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
R_INT (pr) = Qtell (h->file);
}
static void
bi_Qflush (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
R_INT (pr) = Qflush (h->file);
}
static void
bi_Qeof (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
R_INT (pr) = Qeof (h->file);
}
static void
bi_Qfilesize (progs_t *pr)
{
int handle = P_INT (pr, 0);
qfile_t *h = get_handle (pr, __FUNCTION__, handle);
R_INT (pr) = Qfilesize (h->file);
}
static builtin_t secure_builtins[] = {
{"Qrename", secured, -1},
{"Qremove", secured, -1},
{"Qopen", secured, -1},
{0}
};
static builtin_t insecure_builtins[] = {
{"Qrename", bi_Qrename, -1},
{"Qremove", bi_Qremove, -1},
{"Qopen", bi_Qopen, -1},
{0}
};
static builtin_t builtins[] = {
{"Qclose", bi_Qclose, -1},
{"Qgetline", bi_Qgetline, -1},
{"Qreadstring", bi_Qreadstring, -1},
{"Qread", bi_Qread, -1},
{"Qwrite", bi_Qwrite, -1},
{"Qputs", bi_Qputs, -1},
// {"Qgets", bi_Qgets, -1},
{"Qgetc", bi_Qgetc, -1},
{"Qputc", bi_Qputc, -1},
{"Qseek", bi_Qseek, -1},
{"Qtell", bi_Qtell, -1},
{"Qflush", bi_Qflush, -1},
{"Qeof", bi_Qeof, -1},
{"Qfilesize", bi_Qfilesize, -1},
{0}
};
void
RUA_QFile_Init (progs_t *pr, int secure)
{
qfile_resources_t *res = calloc (sizeof (qfile_resources_t), 1);
PR_Resources_Register (pr, "QFile", res, bi_qfile_clear);
if (secure) {
PR_RegisterBuiltins (pr, secure_builtins);
} else {
PR_RegisterBuiltins (pr, insecure_builtins);
}
PR_RegisterBuiltins (pr, builtins);
}
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