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https://github.com/SEPPDROID/Digital-Research-Source-Code.git
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92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/***********************************************************************
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*
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* g e t p a s s F u n c t i o n
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* -------------------------------
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* Copyright 1982 by Digital Research Inc. All rights reserved.
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*
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* "getpass" writes a prompt to the console (NOT stdout) and accepts
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* a string of 1-8 chars from the console (NOT stdin) without
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* echoing the input to the terminal. Only limited CP/M line edit
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* commands are available (CTL H, DEL, CTL X) on input.
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*
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* Calling sequence:
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* pret = getpass(prompt)
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* Where:
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* pret -> ptr to 1-8 chars of null terminated password
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* prompt -> null teminated console out msg.
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*
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* Modified:
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* Oct 83 whf - handle OS Independent Raw Input
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*
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**************************************************************************/
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#include "portab.h"
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#include "osif.h"
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BYTE * getpass(prompt) /* CLEAR FUNCTION ***********/
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BYTE *prompt;
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{
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MLOCAL BYTE ibuf[9];
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_conout(prompt,strlen(prompt),CONOUT); /* same fn write uses */
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_noecho(ibuf,9);
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return(ibuf);
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}
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#define CMASK 0x7F
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#define DEL 0x7F
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#define CTRLX 0x18
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#define CTRLC 0x03
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MLOCAL _noecho(bf,ln)
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REG BYTE *bf;
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WORD ln;
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{
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REG WORD cur;
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WORD ch;
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cur = 0;
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FOREVER {
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switch( ch = CMASK & _ttyinraw()) {
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case '\b':
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case DEL:
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if( cur>0 ) {
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cur--;
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bf--;
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}
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break;
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case CTRLX:
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bf -= cur;
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cur = 0;
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break;
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case '\r':
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case '\n':
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*bf = NULL;
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return;
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case CTRLC:
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exit(1);
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default:
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*bf++ = ch;
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cur++;
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if( cur+1 >= ln ) {
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*bf = NULL;
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return;
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}
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}
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}
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}
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/****************************************************************************/
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MLOCAL _conout(buffer,count,os_func) /***************************/
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REG BYTE *buffer; /* -> 1st char output */
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REG WORD count; /* = # bytes to xfer */
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REG WORD os_func; /* OS function to use */
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{ /***************************/
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WORD xcount; /* save area for count */
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/* */
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while(count-- > 0) /* Until all written */
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__OSIF(os_func,*buffer++); /* Output next character */
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} /***************************/
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