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cc65/libsrc/tgi/tgi_load.c
cuz a1d914d52d Restructured former fcntl.h, added new include files unistd.h and sys/types.h.
git-svn-id: svn://svn.cc65.org/cc65/trunk@2214 b7a2c559-68d2-44c3-8de9-860c34a00d81
2003-06-12 18:08:23 +00:00

101 lines
4.1 KiB
C

/*****************************************************************************/
/* */
/* tgi_load.c */
/* */
/* Loader module for TGI drivers */
/* */
/* */
/* */
/* (C) 2002-2003 Ullrich von Bassewitz */
/* Römerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <modload.h>
#include <tgi.h>
#include <tgi/tgi-kernel.h>
void __fastcall__ tgi_load (unsigned char mode)
/* Install the matching driver for the given mode. Will just load the driver
* and check if loading was successul. Will not switch to gaphics mode.
*/
{
const char* name = tgi_map_mode (mode);
if (name == 0) {
/* No driver for this mode */
tgi_error = TGI_ERR_NO_DRIVER;
} else {
/* Load the driver */
tgi_load_driver (name);
}
}
void __fastcall__ tgi_load_driver (const char* name)
/* Install the given driver. This function is identical to tgi_load with the
* only difference that the name of the driver is specified explicitly. You
* should NOT use this function in most cases, use tgi_load() instead.
*/
{
static struct mod_ctrl ctrl = {
read /* Read from disk */
};
unsigned Res;
/* Check if we do already have a driver loaded. If so, remove it. */
if (tgi_drv != 0) {
tgi_unload ();
}
/* Now open the file */
ctrl.callerdata = open (name, O_RDONLY);
if (ctrl.callerdata >= 0) {
/* Load the module */
Res = mod_load (&ctrl);
/* Close the input file */
close (ctrl.callerdata);
/* Check the return code */
if (Res == MLOAD_OK) {
/* Check the driver signature, install the driver */
tgi_install (ctrl.module);
return;
}
}
/* Error loading the driver */
tgi_error = TGI_ERR_CANNOT_LOAD;
}