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48 lines
1.4 KiB
ArmAsm
48 lines
1.4 KiB
ArmAsm
;
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; Ullrich von Bassewitz, 2003-08-12
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;
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; Helper functions for several high level file functions.
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;
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.include "errno.inc"
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.code
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; ----------------------------------------------------------------------------
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; int __fastcall__ _directerrno (unsigned char code);
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; /* Set errno to a specific error code, clear _oserror and return -1. Used
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; ** by the library.
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; */
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__directerrno:
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jsr __seterrno ; Set errno, returns with A = 0
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sta __oserror ; Clear __oserror
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beq fail ; Branch always
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; ----------------------------------------------------------------------------
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; int __fastcall__ _mappederrno (unsigned char code);
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; /* Set _oserror to the given platform specific error code. If it is a real
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; ** error code (not zero) set errno to the corresponding system error code
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; ** and return -1. Otherwise return zero.
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; ** Used by the library.
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; */
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__mappederrno:
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sta __oserror ; Store the error code
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tax ; Did we have an error?
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beq ok ; Branch if no
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jsr __osmaperrno ; Map os error into errno code
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jsr __seterrno ; Save in errno
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fail: lda #$FF ; Return -1
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tax
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ok: rts
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; ----------------------------------------------------------------------------
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.bss
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__errno:
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.word 0
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