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73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: lib/sdk/crt/conio/cgets.c
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* PURPOSE: C Runtime
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* PROGRAMMER: Eric Kohl (Imported from DJGPP)
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*/
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#include <precomp.h>
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/*
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* @implemented
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*/
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char *_cgets(char *string)
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{
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unsigned len = 0;
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unsigned int maxlen_wanted;
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char *sp;
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int c;
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/*
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* Be smart and check for NULL pointer.
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* Don't know wether TURBOC does this.
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*/
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if (!string)
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return(NULL);
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maxlen_wanted = (unsigned int)((unsigned char)string[0]);
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sp = &(string[2]);
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/*
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* Should the string be shorter maxlen_wanted including or excluding
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* the trailing '\0' ? We don't take any risk.
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*/
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while(len < maxlen_wanted-1)
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{
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c=_getch();
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/*
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* shold we check for backspace here?
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* TURBOC does (just checked) but doesn't in cscanf (thats harder
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* or even impossible). We do the same.
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*/
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if (c == '\b')
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{
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if (len > 0)
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{
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_cputs("\b \b"); /* go back, clear char on screen with space
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and go back again */
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len--;
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sp[len] = '\0'; /* clear the character in the string */
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}
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}
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else if (c == '\r')
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{
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sp[len] = '\0';
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break;
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}
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else if (c == 0)
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{
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/* special character ends input */
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sp[len] = '\0';
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_ungetch(c); /* keep the char for later processing */
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break;
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}
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else
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{
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sp[len] = _putch(c);
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len++;
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}
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}
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sp[maxlen_wanted-1] = '\0';
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string[1] = (char)((unsigned char)len);
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return(sp);
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}
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