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<P><table class="ttop"><th class="tpre"><a href="33_Listing_of_make_mem.cc.html">Previous Lesson</a></th><th class="ttop"><a href="toc.html">Table of Content</a></th><th class="ttop"></th></table>
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<H1><A NAME="section_1">34 LISTING OF end_conv.cc</A></H1>
<pre class="vhdl">
1 #include "assert.h"
2 #include "ctype.h"
3 #include "stdio.h"
4 #include "string.h"
5
6 //-----------------------------------------------------------------------------
7 int
8 main(int argc, const char * argv)
9 {
10 char buffer[2000];
11 int pc, val, val2;
12
13 for (;;)
14 {
15 char * s = fgets(buffer, sizeof(buffer) - 2, stdin);
16 if (s == 0) return 0;
17
18 // map lines ' xx:' and 'xxxxxxxx; to 2* the hex value.
19 //
20 if (
21 (isxdigit(s[0]) || s[0] == ' ') &&
22 (isxdigit(s[1]) || s[1] == ' ') &&
23 (isxdigit(s[2]) || s[2] == ' ') &&
24 isxdigit(s[3]) && s[4] == ':') // ' xx:'
25 {
26 assert(1 == sscanf(s, " %x:", &pc));
27 if (pc & 1) printf("%4X+:", pc/2);
28 else printf("%4X:", pc/2);
29 s += 5;
30 }
31 else if (isxdigit(s[0]) && isxdigit(s[1]) && isxdigit(s[2]) &&
32 isxdigit(s[3]) && isxdigit(s[4]) && isxdigit(s[5]) &&
33 isxdigit(s[6]) && isxdigit(s[7])) // 'xxxxxxxx'
34 {
35 assert(1 == sscanf(s, "%x", &pc));
36 if (pc & 1) printf("%8.8X+:", pc/2);
37 else printf("%8.8X:", pc/2);
38 s += 8;
39 }
40 else // other: copy verbatim
41 {
42 printf("%s", s);
43 continue;
44 }
45
46 while (isblank(*s)) printf("%c", *s++);
47
48 // endian swap.
49 //
50 while (isxdigit(s[0]) &&
51 isxdigit(s[1]) &&
52 s[2] == ' ' &&
53 isxdigit(s[3]) &&
54 isxdigit(s[4]) &&
55 s[5] == ' ')
56 {
57 assert(2 == sscanf(s, "%x %x ", &val, &val2));
58 printf("%2.2X%2.2X ", val2, val);
59 s += 6;
60 }
61
62 char * s1 = strstr(s, ".+");
63 char * s2 = strstr(s, ".-");
64 if (s1)
65 {
66 assert(1 == sscanf(s1 + 2, "%d", &val));
67 assert((val & 1) == 0);
68 sprintf(s1, " 0x%X", (pc + val)/2 + 1);
69 printf(s);
70 s = s1 + strlen(s1) + 1;
71 }
72 else if (s2)
73 {
74 assert(1 == sscanf(s2 + 2, "%d", &val));
75 assert((val & 1) == 0);
76 sprintf(s2, " 0x%X", (pc - val)/2 + 1);
77 printf(s);
78 s = s2 + strlen(s2) + 1;
79 }
80
81 printf("%s", s);
82 }
83 }
84 //-----------------------------------------------------------------------------
<pre class="filename">
tools/end_conv.cc
</pre></pre>
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