1 /*****************************************************************************/
5 /* Loader module for TGI drivers */
9 /* (C) 2002 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
40 #include <tgi/tgi-kernel.h>
44 static unsigned char ReadInputBlock (struct mod_ctrl* C, void* Buf, unsigned Size)
46 return (fread (Buf, 1, Size, C->callerdata) != Size);
51 void __fastcall__ tgi_load (unsigned char mode)
52 /* Install the matching driver for the given mode. Will just load the driver
53 * and check if loading was successul. Will not switch to gaphics mode.
56 const char* name = tgi_map_mode (mode);
58 /* No driver for this mode */
59 tgi_error = TGI_ERR_NO_DRIVER;
62 tgi_load_driver (name);
68 void __fastcall__ tgi_load_driver (const char* name)
69 /* Install the given driver. This function is identical to tgi_load with the
70 * only difference that the name of the driver is specified explicitly. You
71 * should NOT use this function in most cases, use tgi_load() instead.
74 static const unsigned char marker[4] = { 0x74, 0x67, 0x69, 0x00 };
76 static struct mod_ctrl ctrl = {
77 ReadInputBlock /* read_block */
81 /* Check if we do already have a driver loaded. If so, remove it. */
86 /* Now open the file */
87 ctrl.callerdata = fopen (name, "r");
88 if (ctrl.callerdata == 0) {
89 tgi_error = TGI_ERR_CANNOT_LOAD;
94 Res = mod_load (&ctrl);
96 /* Close the input file */
97 fclose (ctrl.callerdata);
99 /* Check the return code */
100 if (Res == MLOAD_OK) {
102 /* Get a pointer to the loaded driver */
103 tgi_drv = (tgi_drv_header*) ctrl.module;
105 /* Check the header */
106 if (memcmp (tgi_drv, marker, sizeof (marker)) != 0) {
110 tgi_error = TGI_ERR_INV_DRIVER;
112 /* Driver is ok do setup */
118 /* Error loading the driver */
119 tgi_error = TGI_ERR_CANNOT_LOAD;