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125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
/* Copyright (c) 1992, 1995 John E. Davis
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* All rights reserved.
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Perl Artistic License.
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*/
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#include "config.h"
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#include <stdio.h>
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#include "slang.h"
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#include "_slang.h"
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unsigned int SLang_Input_Buffer_Len = 0;
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unsigned char SLang_Input_Buffer [MAX_INPUT_BUFFER_LEN];
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int SLang_Abort_Char = 7;
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int SLang_Ignore_User_Abort = 0;
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/* This has the effect of mapping all characters in the range 128-169 to
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* ESC [ something
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*/
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#ifndef __GO32__
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# if defined(__unix__) || defined(vms)
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# define DEC_8BIT_HACK 64
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# endif
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#endif
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#ifdef OS2_NT /* see the replacement in src/slint.c */
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unsigned int SLang_getkey (void)
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{
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unsigned int imax;
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unsigned int ch;
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if (SLang_Input_Buffer_Len)
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{
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ch = (unsigned int) *SLang_Input_Buffer;
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SLang_Input_Buffer_Len--;
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imax = SLang_Input_Buffer_Len;
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SLMEMCPY ((char *) SLang_Input_Buffer,
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(char *) (SLang_Input_Buffer + 1), imax);
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}
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else if (0xFFFF == (ch = SLsys_getkey ())) return ch;
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#ifdef DEC_8BIT_HACK
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if (ch & 0x80)
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{
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unsigned char i;
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i = (unsigned char) (ch & 0x7F);
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if (i < ' ')
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{
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i += DEC_8BIT_HACK;
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SLang_ungetkey (i);
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ch = 27;
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}
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}
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#endif
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return(ch);
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}
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#endif /* OS2_NT */
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void SLang_ungetkey_string (unsigned char *s, unsigned int n)
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{
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register unsigned char *bmax, *b, *b1;
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if (SLang_Input_Buffer_Len + n + 3 > MAX_INPUT_BUFFER_LEN) return;
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b = SLang_Input_Buffer;
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bmax = (b - 1) + SLang_Input_Buffer_Len;
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b1 = bmax + n;
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while (bmax >= b) *b1-- = *bmax--;
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bmax = b + n;
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while (b < bmax) *b++ = *s++;
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SLang_Input_Buffer_Len += n;
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}
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void SLang_buffer_keystring (unsigned char *s, unsigned int n)
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{
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if (n + SLang_Input_Buffer_Len + 3 > MAX_INPUT_BUFFER_LEN) return;
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SLMEMCPY ((char *) SLang_Input_Buffer + SLang_Input_Buffer_Len,
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(char *) s, n);
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SLang_Input_Buffer_Len += n;
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}
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void SLang_ungetkey (unsigned char ch)
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{
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SLang_ungetkey_string(&ch, 1);
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}
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#ifdef OS2_NT /* see the replacement in src/slint.c */
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int SLang_input_pending (int tsecs)
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{
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int n;
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unsigned char c;
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if (SLang_Input_Buffer_Len) return (int) SLang_Input_Buffer_Len;
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n = SLsys_input_pending (tsecs);
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if (n <= 0) return 0;
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c = (unsigned char) SLang_getkey ();
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SLang_ungetkey_string (&c, 1);
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return n;
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}
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#endif /* OS2_NT */
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void SLang_flush_input (void)
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{
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int quit = SLKeyBoard_Quit;
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SLang_Input_Buffer_Len = 0;
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SLKeyBoard_Quit = 0;
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while (SLsys_input_pending (0) > 0)
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{
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(void) SLsys_getkey ();
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/* Set this to 0 because SLsys_getkey may stuff keyboard buffer if
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* key sends key sequence (OS/2, DOS, maybe VMS).
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*/
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SLang_Input_Buffer_Len = 0;
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}
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SLKeyBoard_Quit = quit;
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}
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