| /svarcom/trunk/cmd/chcp.c |
|---|
| 3,7 → 3,7 |
| */ |
| static int cmd_chcp(struct cmd_funcparam *p) { |
| short nnn = 0; |
| unsigned short nnn = 0; |
| unsigned short errcode = 0; |
| if (cmd_ishlp(p)) { |
| 25,8 → 25,7 |
| /* one param? must be numeric in range 1+ */ |
| if (p->argc == 1) { |
| nnn = atoi(p->argv[0]); |
| if (nnn < 1) { |
| if (atouns(&nnn, p->argv[0]) != 0) { |
| outputnl("Invalid code page number"); |
| return(-1); |
| } |
| /svarcom/trunk/command.c |
|---|
| 57,7 → 57,7 |
| struct config { |
| int locate; |
| int install; |
| int envsiz; |
| unsigned short envsiz; |
| } cfg; |
| 70,8 → 70,9 |
| cfg->locate = 1; |
| } |
| if (strstartswith(argv[i], "/e:") == 0) { |
| cfg->envsiz = atoi(argv[i]+3); |
| if (cfg->envsiz < 64) cfg->envsiz = 0; |
| if ((atouns(&(cfg->envsiz), argv[i] + 3) != 0) || (cfg->envsiz < 64)) { |
| cfg->envsiz = 0; |
| } |
| } |
| } |
| } |
| /svarcom/trunk/helpers.c |
|---|
| 301,3 → 301,44 |
| dst[end] = 0; |
| } |
| } |
| /* converts an ASCIIZ string into an unsigned short. returns 0 on success. */ |
| int atouns(unsigned short *r, const char *s) { |
| int err = 0; |
| _asm { |
| mov si, s |
| xor ax, ax /* general purpose register */ |
| xor cx, cx /* contains the result */ |
| mov bx, 10 /* used as a multiplicative step */ |
| NEXTBYTE: |
| xchg cx, ax /* move result into cx temporarily */ |
| lodsb /* AL = DS:[SI++] */ |
| /* is AL 0? if so we're done */ |
| test al, al |
| jz DONE |
| /* validate that AL is in range '0'-'9' */ |
| sub al, '0' |
| jc FAIL /* neg result */ |
| cmp al, 9 |
| jg FAIL |
| /* restore result into AX (CX contains the new digit) */ |
| xchg cx, ax |
| /* multiply result by 10 and add cl */ |
| mul bx /* DX AX = AX * BX(10) */ |
| jc FAIL /* overflow */ |
| add ax, cx |
| /* if CF then overflow occured (overflow part lands in DX) */ |
| jnc NEXTBYTE |
| FAIL: |
| inc [err] |
| DONE: /* save result (CX) into indirect memory address r */ |
| mov bx, [r] |
| mov [bx], cx |
| } |
| return(err); |
| } |
| /svarcom/trunk/helpers.h |
|---|
| 78,4 → 78,7 |
| /* converts a FCB filename (FILENAMEEXT) into normal format (FILENAME.EXT) */ |
| void file_fcb2fname(char *dst, const char *src); |
| /* converts an ASCIIZ string into an unsigned short. returns 0 on success. */ |
| int atouns(unsigned short *r, const char *s); |
| #endif |