Clarified the dscp-tos documentation a bit.
[doldaconnect.git] / config / util / baseconv.c
CommitLineData
dc32e1a7 1#include <stdlib.h>
2#include <stdio.h>
3#include <string.h>
4#include <unistd.h>
5
6#include "utils.h"
7
8int main(int argc, char **argv)
9{
10 char buf[25];
11 int ret, linelen;
12 char *decbuf, *encbuf;
13 size_t data, buflen;
14 char *(*decfn)(char *, size_t *);
15 char *(*encfn)(char *, size_t);
16
2db027fa 17 if(argc < 3) {
18 fprintf(stderr, "usage: baseconv [4568] [4568]\n");
19 fprintf(stderr, "\tenter data on stdin\n");
20 exit(1);
21 }
dc32e1a7 22 data = 0;
23 if(!strcmp(argv[1], "4")) {
24 decfn = hexdecode;
25 } else if(!strcmp(argv[1], "5")) {
26 decfn = base32decode;
27 } else if(!strcmp(argv[1], "6")) {
28 decfn = base64decode;
29 } else if(!strcmp(argv[1], "8")) {
30 decfn = NULL;
31 } else {
32 fprintf(stderr, "unknown decoding: %s\n", argv[1]);
33 exit(1);
34 }
35 if(!strcmp(argv[2], "4")) {
36 encfn = hexencode;
37 } else if(!strcmp(argv[2], "5")) {
38 encfn = base32encode;
39 } else if(!strcmp(argv[2], "6")) {
40 encfn = base64encode;
41 } else if(!strcmp(argv[2], "8")) {
42 encfn = NULL;
43 } else {
44 fprintf(stderr, "unknown encoding: %s\n", argv[1]);
45 exit(1);
46 }
47 linelen = 0;
48 while((ret = read(0, buf + data, 24 - data)) >= 0) {
49 if(((data += ret) == 24) || (ret == 0)) {
50 if(decfn == NULL) {
51 decbuf = memcpy(smalloc(data), buf, data);
52 buflen = data;
53 } else {
54 buf[data] = 0;
55 if((decbuf = decfn(buf, &buflen)) == NULL) {
56 fprintf(stderr, "invalid input\n");
57 exit(1);
58 }
59 }
60 if(encfn == NULL) {
61 encbuf = memcpy(smalloc(buflen), decbuf, buflen);
62 fwrite(encbuf, 1, buflen, stdout);
63 } else {
64 encbuf = encfn(decbuf, buflen);
65 buflen = strlen(encbuf);
66 if(linelen + buflen > 60) {
67 fwrite(encbuf, 1, 60 - linelen, stdout);
68 fwrite("\n", 1, 1, stdout);
d6af9cf3 69 memmove(encbuf, encbuf + 60 - linelen, buflen -= 60 - linelen);
dc32e1a7 70 }
71 fwrite(encbuf, 1, buflen, stdout);
72 linelen += buflen;
73 }
74 fflush(stdout);
75 free(encbuf);
76 free(decbuf);
77 data = 0;
78 }
79 if(ret == 0)
80 break;
81 }
82 if(ret < 0) {
83 perror("read");
84 exit(1);
85 }
86 return(0);
87}