| 145,9 → 145,12 |
|---|
| } |
| |
| |
| /* converts a path to its canonic representation */ |
| void file_truename(const char *src, char *dst) { |
| /* converts a path to its canonic representation, returns 0 on success |
| * or DOS err on failure (invalid drive) */ |
| unsigned short file_truename(const char *src, char *dst) { |
| unsigned short res = 0; |
| _asm { |
| push es |
| mov ah, 0x60 /* query truename, DS:SI=src, ES:DI=dst */ |
| push ds |
| pop es |
| 154,7 → 157,12 |
|---|
| mov si, src |
| mov di, dst |
| int 0x21 |
| jnc DONE |
| mov [res], ax |
| DONE: |
| pop es |
| } |
| return(res); |
| } |
| |
| |
| 208,3 → 216,32 |
|---|
| int 0x21 |
| } |
| } |
| |
| |
| /* validate a drive (A=0, B=1, etc). returns 1 if valid, 0 otherwise */ |
| int isdrivevalid(unsigned char drv) { |
| _asm { |
| mov ah, 0x19 /* query default (current) disk */ |
| int 0x21 /* drive in AL (0=A, 1=B, etc) */ |
| mov ch, al /* save current drive to ch */ |
| /* try setting up the drive as current */ |
| mov ah, 0x0E /* select default drive */ |
| mov dl, [drv] /* 0=A, 1=B, etc */ |
| int 0x21 |
| /* this call does not set CF on error, I must check cur drive to look for success */ |
| mov ah, 0x19 /* query default (current) disk */ |
| int 0x21 /* drive in AL (0=A, 1=B, etc) */ |
| mov [drv], 1 /* preset result as success */ |
| cmp al, dl /* is eq? */ |
| je DONE |
| mov [drv], 0 /* fail */ |
| jmp FAILED |
| DONE: |
| /* set current drive back to what it was initially */ |
| mov ah, 0x0E |
| mov dl, ch |
| int 0x21 |
| FAILED: |
| } |
| return(drv); |
| } |