mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Sapphire/s/sapphRes

   1 ;
   2 ; sapphRes.s
   3 ;
   4 ; Sapphire shared resources (MDW)
   5 ;
   6 ; © 1995-1998 Straylight
   7 ;
   8
   9 ;----- Licensing note -------------------------------------------------------
  10 ;
  11 ; This file is part of Straylight's Sapphire library.
  12 ;
  13 ; Sapphire 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 ; Sapphire 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 Sapphire.  If not, write to the Free Software Foundation,
  25 ; 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26
  27 ;----- Standard header ------------------------------------------------------
  28
  29                 GET     libs:header
  30                 GET     libs:swis
  31
  32                 GET     libs:stream
  33
  34 ;----- External dependencies ------------------------------------------------
  35
  36                 IMPORT  |Image$$RO$$Base|
  37
  38                 IMPORT  rsc_sprites
  39                 IMPORT  rsc_msgBase
  40                 IMPORT  rsc_msgLimit
  41                 IMPORT  rsc_tplBase
  42                 IMPORT  rsc_tplLimit
  43
  44 ;----- Main code ------------------------------------------------------------
  45
  46                 AREA    |Main$$Code|,CODE,READONLY
  47
  48 ; --- sapphRes_find ---
  49 ;
  50 ; On entry:     R0 == resource type code
  51 ;               R1 == pointer to resource name (only required for
  52 ;                       srType_template)
  53 ;
  54 ; On exit:      CS if found, and
  55 ;                 R0 == address of resource
  56 ;                 R1 == limit (for messages)
  57 ;               else CC and
  58 ;                 Registers preserved
  59 ;
  60 ; Use:          Looks up the address of a resource in the shared resource
  61 ;               DLL.
  62
  63                 EXPORT  sapphRes_find
  64 sapphRes_find   ROUT
  65
  66                 CMP     R0,#srType_max          ;Is the type in range?
  67                 ADDCC   PC,PC,R0,LSL #2         ;Yes -- dispatch it then
  68                 BICS    PC,R14,#C_flag          ;Otherwise couldn't find it
  69
  70                 B       sr__findSprite          ;Find a sprite resource
  71                 B       sr__findMessages        ;Find a messages resource
  72                 B       sr__findTemplate        ;Find a template resource
  73
  74                 LTORG
  75
  76 ; --- sr__findSprite ---
  77 ;
  78 ; On entry:     --
  79 ;
  80 ; On exit:      R0 == address of a sprite area
  81 ;
  82 ; Use:          Locates the sprite resource within the DLL.
  83
  84 sr__findSprite  ROUT
  85
  86                 LDR     R0,=rsc_sprites         ;Find the sprite area
  87                 ORRS    PC,R14,#C_flag          ;And return to caller
  88
  89                 LTORG
  90
  91 ; --- sr__findMessages ---
  92 ;
  93 ; On entry:     --
  94 ;
  95 ; On exit:      R0 == address of messages base
  96 ;               R1 == address of messages limit
  97 ;
  98 ; Use:          Locates the messages resource within the DLL.
  99
 100 sr__findMessages ROUT
 101
 102                 ADR     R0,sr__msgs             ;Point to messages base/limit
 103                 LDMIA   R0,{R0,R1}              ;Load them out
 104                 ORRS    PC,R14,#C_flag          ;And return to caller
 105
 106 sr__msgs        DCD     rsc_msgBase
 107                 DCD     rsc_msgLimit
 108
 109                 LTORG
 110
 111 ; --- sr__findTemplate ---
 112 ;
 113 ; On entry:     R1 == pointer to template name
 114 ;
 115 ; On exit:      CS and R0 == pointer to embedded template block, or CC
 116 ;
 117 ; Use:          Locates a named window defintion.
 118
 119 sr__findTemplate ROUT
 120
 121                 STMFD   R13!,{R2-R6,R14}        ;Save some registers
 122                 ADR     R14,sr__tpls            ;Point to base and limit
 123                 LDMIA   R14,{R2,R3}             ;Load them out
 124
 125                 ; --- Search the template table ---
 126
 127 10              CMP     R2,R3                   ;Have we finished yet?
 128                 BCS     %90sr__findTemplate     ;Yes -- then we failed
 129
 130                 ; --- Check for a name match ---
 131
 132                 MOV     R4,R1
 133 00              LDRB    R5,[R4],#1              ;Load first char of name
 134                 SUB     R14,R5,#'A'             ;Convert to a letter index
 135                 CMP     R14,#26                 ;Is it in range?
 136                 ORRCC   R5,R5,#&20              ;Yes -- convert to lowercase
 137                 CMP     R5,#&20                 ;Is the byte a control char?
 138                 MOVCC   R5,#0                   ;Yes -- say it's zero
 139
 140                 LDRB    R6,[R2],#1              ;Load first char of name
 141                 SUB     R14,R6,#'A'             ;Convert to a letter index
 142                 CMP     R14,#26                 ;Is it in range?
 143                 ORRCC   R6,R6,#&20              ;Yes -- convert to lowercase
 144                 CMP     R6,#&20                 ;Is the byte a control char?
 145                 MOVCC   R6,#0                   ;Yes -- say it's zero
 146
 147                 ; --- Compare the characters
 148
 149                 CMP     R5,R6                   ;Do the chars match?
 150                 BNE     %50sr__findTemplate     ;No -- move on to next one
 151                 CMP     R5,#0                   ;Is it the end?
 152                 BNE     %b00                    ;No -- keep looking
 153
 154                 ; --- Found a match ---
 155
 156                 ADD     R2,R2,#3                ;Word align the output
 157                 BIC     R2,R2,#3                ;To make sure
 158                 LDR     R0,[R2,#0]              ;Load the template base
 159                 LDMFD   R13!,{R2-R6,R14}        ;Restore registers
 160                 ORRS    PC,R14,#C_flag          ;And return success
 161
 162                 ; --- Failed -- move on to next entry ---
 163
 164 50              CMP     R6,#&20                 ;Reached the end yet?
 165                 LDRCSB  R6,[R2],#1              ;No -- load next byte
 166                 BCS     %b50                    ;And keep on looping
 167                 ADD     R2,R2,#4+3              ;Word align the output
 168                 BIC     R2,R2,#3                ;To make sure
 169                 B       %10sr__findTemplate     ;And rejoin the main loop
 170
 171                 ; --- Failed entirely ---
 172
 173 90              LDMFD   R13!,{R2-R6,R14}        ;Restore registers
 174                 BICS    PC,R14,#C_flag          ;And return to caller
 175
 176 sr__tpls        DCD     rsc_tplBase
 177                 DCD     rsc_tplLimit
 178
 179                 LTORG
 180
 181 ;----- Resource types -------------------------------------------------------
 182
 183                 ^       0
 184 srType_sprites  #       1                       ;Sprite resource, returned as
 185                                                 ;address of sprite area
 186
 187 srType_messages #       1                       ;Messages resource, returned
 188                                                 ;as address of base and limit
 189                                                 ;pair
 190
 191 srType_template #       1                       ;Template (window) resource,
 192                                                 ;returned as address of
 193                                                 ;embedded template def.
 194
 195 srType_max      #       0
 196
 197 ;----- That's all, folks ----------------------------------------------------
 198
 199                 END