mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Steel/h/os

   1 /*
   2  * os.h
   3  *
   4  * OS kernel and generic SWI interface
   5  *
   6  * © 1994-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Steel library.
  12  *
  13  * Steel is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Steel is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with Steel.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #ifndef __os_h
  29 #define __os_h
  30
  31 #ifndef __kernel_h
  32   #include "kernel.h"
  33 #endif
  34
  35 /*----- Notes -------------------------------------------------------------*
  36  *
  37  * --- Deviency from the RISC_OSLib version ---
  38  *
  39  * All the generic SWI interfaces are implemented in this module, rather
  40  * than being passed on via the run-time kernel.
  41  *
  42  * os_error is declared here to be synonymous with _kernel_oserror, to avoid
  43  * messy casts between the two (otherwise identical) error structures.
  44  *
  45  * All the specific SWI interfaces (e.g. os_find etc.) are implemented by
  46  * direct calls to the SWI in question, rather than by being passed on
  47  * through os_swix and then on to _kernel_swi.  This is also true of the
  48  * other SWI interfaces found in wimp, bbc etc.
  49  *
  50  * --- Additions ---
  51  *
  52  * The collection of register-counted generic SWI veneers (i.e. os_swi0,
  53  * os_swi4r etc.) have been filled in with versions for 5 registers.  The
  54  * non-returning ones (os_swi0-os_swi6) are implemented using only two
  55  * separate routines.  The returning calls are implemented separately, but
  56  * each one uses a single main SWI veneer.
  57  *
  58  * Also, two more SWI interfaces have been added: os_swiv and os_swivr, each
  59  * of which takes a variable number of arguments (the input registers in
  60  * order).  os_swivr will write the output registers into a register block.
  61  */
  62
  63 /*----- Miscellaneous types -----------------------------------------------*/
  64
  65 #ifndef BOOL
  66   #define BOOL int
  67   #define TRUE 1
  68   #define FALSE 0
  69 #endif
  70
  71 /*----- Generic SWI veneers -----------------------------------------------*/
  72
  73 /* --- SWI handling types --- *
  74  *
  75  * We map directly to the kernel types, because they're identical and it
  76  * prevents messy typecasting.
  77  */
  78
  79 typedef _kernel_oserror os_error;
  80 typedef _kernel_swi_regs os_regset;
  81
  82 /* --- The basic SWI veneers --- */
  83
  84 void os_swi(int swi,os_regset *r);
  85 os_error *os_swix(int swi,os_regset *r);
  86
  87 /* --- Counted, nonreturning SWI veneers --- */
  88
  89 os_error *os_swi0(int swi);
  90
  91 os_error *os_swi1(int swi,int r0);
  92
  93 os_error *os_swi2(int swi,int r0,
  94                           int r1);
  95
  96 os_error *os_swi3(int swi,int r0,
  97                           int r1,
  98                           int r2);
  99
 100 os_error *os_swi4(int swi,int r0,
 101                           int r1,
 102                           int r2,
 103                           int r3);
 104
 105 os_error *os_swi5(int swi,int r0,
 106                           int r1,
 107                           int r2,
 108                           int r3,
 109                           int r4);
 110
 111 os_error *os_swi6(int swi,int r0,
 112                           int r1,
 113                           int r2,
 114                           int r3,
 115                           int r4,
 116                           int r5);
 117
 118 /* --- Counted, returning SWI veneers --- */
 119
 120 os_error *os_swi1r(int swi,int r0,
 121                            int *r0_out);
 122
 123 os_error *os_swi2r(int swi,int r0,
 124                            int r1,
 125                            int *r0_out,
 126                            int *r1_out);
 127
 128 os_error *os_swi3r(int swi,int r0,
 129                            int r1,
 130                            int r2,
 131                            int *r0_out,
 132                            int *r1_out,
 133                            int *r2_out);
 134
 135 os_error *os_swi4r(int swi,int r0,
 136                            int r1,
 137                            int r2,
 138                            int r3,
 139                            int *r0_out,
 140                            int *r1_out,
 141                            int *r2_out,
 142                            int *r3_out);
 143
 144 os_error *os_swi5r(int swi,int r0,
 145                            int r1,
 146                            int r2,
 147                            int r3,
 148                            int r4,
 149                            int *r0_out,
 150                            int *r1_out,
 151                            int *r2_out,
 152                            int *r3_out,
 153                            int *r4_out);
 154
 155 os_error *os_swi6r(int swi,int r0,
 156                            int r1,
 157                            int r2,
 158                            int r3,
 159                            int r4,
 160                            int r5,
 161                            int *r0_out,
 162                            int *r1_out,
 163                            int *r2_out,
 164                            int *r3_out,
 165                            int *r4_out,
 166                            int *r5_out);
 167
 168 /* --- Variable argument SWI veneers --- */
 169
 170 os_error *os_swiv(int swi,...);
 171 os_error *os_swivr(int swi,os_regset *r_out,...);
 172
 173 /*----- Specific SWI veneers ----------------------------------------------*/
 174
 175 /* --- Structure types --- *
 176  *
 177  * These have dummy blocks on the end for compatibility with RISC_OSLib
 178  * tried to treat them as os_regsets.
 179  */
 180
 181 typedef struct
 182 {
 183   int action;                           /* Which action to perform         */
 184   char *name;                           /* Name of the file to do it to    */
 185   int loadaddr;                         /* May also be a filetype          */
 186   int execaddr;                         /* File execution address          */
 187   int start;                            /* May also be object length       */
 188   int end;                              /* May also be object attributes   */
 189   int dummy[4];
 190 }
 191 os_filestr;
 192
 193 typedef struct
 194 {
 195   int action;                           /* Which action to perform         */
 196   int file_handle;                      /* May point to directory name     */
 197   void *data_addr;                      /* Point to input or output buffer */
 198   int number;                           /* Bytes to get or put, or number  */
 199                                         /*   of filenames to read          */
 200   int seq_point;                        /* Item number to read in dir or 0 */
 201   int buf_len;                          /* Buffer length for reading names */
 202   char *wild_fld;                       /* Pointer to wildcard leafname    */
 203   int dummy[3];
 204 }
 205 os_gbpbstr;
 206
 207 /* --- SWI veneers --- */
 208
 209 os_error *os_byte(int action,int *x,int *y);
 210 os_error *os_word(int action,int *pblock);
 211 os_error *os_file(os_filestr *f);
 212 os_error *os_gbpb(os_gbpbstr *g);
 213 os_error *os_args(os_regset *r);
 214 os_error *os_find(os_regset *r);
 215 os_error *os_cli(const char *command);
 216
 217 /* --- Reading system variables --- *
 218  *
 219  * We recommend using the standard getenv function for this.  The veneer
 220  * returns the string null-terminated, which may mess things up.
 221  */
 222
 223 os_error *os_read_var_val(char *name,char *buffer,int bufferSize);
 224
 225 #endif