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comparison lcdemu/process.c @ 0:e7f1035f10d4

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lcdemu: initial import from freecalypso-tools
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Mar 2018 18:16:45 +0000
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-1:000000000000 0:e7f1035f10d4
1 /*
2 * Processing of LCD output (input to us)
3 */
4
5 #include <stdio.h>
6 #include <stdint.h>
7 #include <stdlib.h>
8 #include <ctype.h>
9 #include <string.h>
10 #include <strings.h>
11 #include <X11/Xlib.h>
12 #include <X11/Xresource.h>
13 #include <X11/Xutil.h>
14 #include "globals.h"
15
16 #define MAX_WIDTH 176
17
18 static unsigned
19 hexdecode(str)
20 char *str;
21 {
22 unsigned accum = 0;
23 int i, c, n;
24
25 for (i = 0; i < 4; i++) {
26 c = str[i];
27 if (isdigit(c))
28 n = c - '0';
29 else if (isupper(c))
30 n = c - 'A' + 10;
31 else
32 n = c - 'a' + 10;
33 accum <<= 4;
34 accum |= n;
35 }
36 return(accum);
37 }
38
39 process_input_line(line)
40 char *line;
41 {
42 int blitrow, blitcol, npix;
43 uint16_t pix16[MAX_WIDTH];
44 char *cp;
45 XImage *xi;
46
47 for (cp = line; isspace(*cp); cp++)
48 ;
49 if (!isdigit(*cp)) {
50 inv: fprintf(stderr, "fc-lcdemu: invalid input line\n");
51 exit(1);
52 }
53 blitrow = atoi(cp);
54 while (isdigit(*cp))
55 cp++;
56 if (!isspace(*cp))
57 goto inv;
58 while (isspace(*cp))
59 cp++;
60 if (!isdigit(*cp))
61 goto inv;
62 blitcol = atoi(cp);
63 while (isdigit(*cp))
64 cp++;
65 if (!isspace(*cp))
66 goto inv;
67 while (isspace(*cp))
68 cp++;
69 if (!isxdigit(*cp))
70 goto inv;
71 for (npix = 0; *cp; ) {
72 if (!isxdigit(cp[0]) || !isxdigit(cp[1]) ||
73 !isxdigit(cp[2]) || !isxdigit(cp[3]))
74 goto inv;
75 if (npix >= MAX_WIDTH) {
76 fprintf(stderr,
77 "fc-lcdemu error: input line exceeds MAX_WIDTH of %d pixels\n",
78 MAX_WIDTH);
79 exit(1);
80 }
81 pix16[npix++] = hexdecode(cp);
82 cp += 4;
83 }
84 xi = convert_function(pix16, npix);
85 XPutImage(mydisplay, mainwindow, mainwingc, xi, 0, 0, blitcol, blitrow,
86 npix, 1);
87 XDestroyImage(xi);
88 }
89
90 input_on_stdin(inbuf, incount)
91 char *inbuf;
92 {
93 char *input_end = inbuf + incount;
94 static char linebuf[1024];
95 static int linesz;
96 char *cp;
97
98 for (cp = inbuf; cp < input_end; cp++) {
99 if (*cp == '\n') {
100 linebuf[linesz] = '\0';
101 process_input_line(linebuf);
102 linesz = 0;
103 continue;
104 }
105 if (linesz < sizeof(linebuf) - 1)
106 linebuf[linesz++] = *cp;
107 }
108 }