Commit | Line | Data |
---|---|---|
f8beb284 MW |
1 | /* $Id: encodeQ.c,v 1.2 1998/02/28 19:03:02 lindberg Exp $*/ |
2 | /* $Name: ezmlm-idx-040 $*/ | |
3 | ||
4 | #include "errtxt.h" | |
5 | #include "mime.h" | |
6 | #include "stralloc.h" | |
7 | #include "strerr.h" | |
8 | ||
9 | static void die_nomem(fatal) | |
10 | char *fatal; | |
11 | { | |
12 | strerr_die2x(111,fatal,ERR_NOMEM); | |
13 | } | |
14 | ||
15 | static char *hexchar = "0123456789ABCDEF"; | |
16 | ||
17 | void encodeQ(indata,n,outdata,fatal) | |
18 | char *indata; | |
19 | unsigned int n; | |
20 | stralloc *outdata; | |
21 | char *fatal; | |
22 | ||
23 | /* converts any character with the high order bit set to */ | |
24 | /* quoted printable. In: n chars of indata, out: stralloc outdata*/ | |
25 | ||
26 | { | |
27 | register char *cpout; | |
28 | register char ch; | |
29 | unsigned int i; | |
30 | char *cpin; | |
31 | ||
32 | cpin = indata; | |
33 | i = 0; | |
34 | /* max 3 outchars per inchar & 2 char newline per 72 chars */ | |
35 | if (!stralloc_copys(outdata,"")) die_nomem(fatal); | |
36 | if (!stralloc_ready(outdata,n * 3 + n/36)) die_nomem(fatal); /* worst case */ | |
37 | cpout = outdata->s; | |
38 | while (n--) { | |
39 | ch = *cpin++; | |
40 | if (ch != ' ' && ch != '\n' && ch != '\t' && | |
41 | (ch > 126 || ch < 33 || ch == 61)) { | |
42 | *(cpout++) = '='; | |
43 | *(cpout++) = hexchar[(ch >> 4) & 0xf]; | |
44 | *(cpout++) = hexchar[ch & 0xf]; | |
45 | i += 3; | |
46 | } else { | |
47 | if (ch == '\n') | |
48 | i = 0; | |
49 | *(cpout++) = ch; | |
50 | } | |
51 | if (i >= 72) { | |
52 | *(cpout++) = '='; | |
53 | *(cpout++) = '\n'; | |
54 | i = 0; | |
55 | } | |
56 | } | |
57 | outdata->len = (unsigned int) (cpout - outdata->s); | |
58 | } |