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cc65/libsrc/tgi/tgi_geterrormsg.s
uz 975a06c2ee Rewrote tgi_load_driver in assembler and fixed a possible memory leak when
doing so. Changed the behaviour in case a driver is already loaded: Since the
library cannot know if this driver was linked statically or loaded
dynamically, an already installed driver is considered an error. It must be
removed before calling tgi_load_driver.


git-svn-id: svn://svn.cc65.org/cc65/trunk@5790 b7a2c559-68d2-44c3-8de9-860c34a00d81
2012-07-22 11:07:46 +00:00

60 lines
1.6 KiB
ArmAsm

;
; Ullrich von Bassewitz, 2004-06-15
;
; const char* __fastcall__ tgi_geterrormsg (unsigned char code);
; /* Get an error message describing the error in code. */
;
.include "tgi-kernel.inc"
.include "tgi-error.inc"
.proc _tgi_geterrormsg
cmp #TGI_ERR_COUNT
bcc L1
lda #TGI_ERR_COUNT ; "Unknown error"
L1: tay
ldx #>msgtab
lda #<msgtab
clc
adc offs,y
bcc L2
inx
L2: rts
.endproc
;----------------------------------------------------------------------------
; Error messages. The messages are currently limited to 256 bytes total.
.rodata
offs: .byte <(msg0-msgtab)
.byte <(msg1-msgtab)
.byte <(msg2-msgtab)
.byte <(msg3-msgtab)
.byte <(msg4-msgtab)
.byte <(msg5-msgtab)
.byte <(msg6-msgtab)
.byte <(msg7-msgtab)
.byte <(msg8-msgtab)
.byte <(msg9-msgtab)
.byte <(msg10-msgtab)
msgtab:
msg0: .asciiz "No error"
msg1: .asciiz "No driver available"
msg2: .asciiz "Cannot load driver"
msg3: .asciiz "Invalid driver"
msg4: .asciiz "Mode not supported by driver"
msg5: .asciiz "Invalid function argument"
msg6: .asciiz "Function not supported"
msg7: .asciiz "Invalid font file"
msg8: .asciiz "Out of resources"
msg9: .asciiz "Unknown error"
msg10: .asciiz "A driver is already installed"
.assert (*-msgtab) < 256, error, "Message table too large"