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Annotation of uae/keybuf.c, revision 1.1

1.1     ! root        1:  /* 
        !             2:   * UAE - The Un*x Amiga Emulator
        !             3:   * 
        !             4:   * Keyboard buffer. Not really needed for X, but for SVGAlib and possibly
        !             5:   * Mac and DOS ports.
        !             6:   * 
        !             7:   * (c) 1995 Bernd Schmidt
        !             8:   */
        !             9: 
        !            10: #include <stdio.h>
        !            11: #include <assert.h>
        !            12: 
        !            13: #include "config.h"
        !            14: #include "amiga.h"
        !            15: #include "options.h"
        !            16: #include "keybuf.h"
        !            17: 
        !            18: static int kpb_first, kpb_last;
        !            19: 
        !            20: static int keybuf[256];
        !            21: 
        !            22: bool keys_available (void)
        !            23: {
        !            24:     return kpb_first != kpb_last;
        !            25: }
        !            26: 
        !            27: int get_next_key (void)
        !            28: {
        !            29:     int key;
        !            30:     
        !            31:     assert (kpb_first != kpb_last);
        !            32:     
        !            33:     key = keybuf[kpb_last];
        !            34:     if (++kpb_last == 256) 
        !            35:        kpb_last = 0;
        !            36:     return key;    
        !            37: }
        !            38: 
        !            39: void record_key (int kc)
        !            40: {
        !            41:     int kpb_next = kpb_first + 1;
        !            42: 
        !            43:     if (kpb_next == 256)
        !            44:        kpb_next = 0;
        !            45:     if (kpb_next == kpb_last) {
        !            46:        fprintf(stderr, "Keyboard buffer overrun. Congratulations.\n");
        !            47:        return;
        !            48:     }
        !            49:     keybuf[kpb_first] = kc;
        !            50:     kpb_first = kpb_next;
        !            51: }
        !            52: 
        !            53: void keybuf_init (void)
        !            54: {
        !            55:     kpb_first = kpb_last = 0;
        !            56: }

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