d9898ee8 |
1 | /* |
2 | ** Copyright 2001 Double Precision, Inc. |
3 | ** See COPYING for distribution information. |
4 | */ |
5 | |
6 | #include <stdio.h> |
7 | #include <ctype.h> |
8 | #include <stdlib.h> |
9 | #include <string.h> |
10 | #include "rfc822hdr.h" |
11 | |
12 | static const char rcsid[]="$Id: rfc822hdr.c,v 1.1 2001/08/12 15:42:02 mrsam Exp $"; |
13 | |
14 | /* |
15 | ** Read the next mail header. |
16 | */ |
17 | |
18 | int rfc822hdr_read(struct rfc822hdr *h, FILE *f, off_t *pos, off_t epos) |
19 | { |
20 | size_t n=0; |
21 | int c; |
22 | |
23 | for (;;) |
24 | { |
25 | if ( n >= h->hdrsize) |
26 | { |
27 | size_t hn=h->hdrsize + 1024; |
28 | char *p= h->header ? realloc(h->header, hn): |
29 | malloc(hn); |
30 | |
31 | if (!p) |
32 | return (-1); |
33 | |
34 | h->header=p; |
35 | h->hdrsize=hn; |
36 | } |
37 | |
38 | if (pos && *pos >= epos) |
39 | { |
40 | h->header[n]=0; |
41 | break; |
42 | } |
43 | |
44 | c=getc(f); |
45 | if (c == EOF) |
46 | { |
47 | if (pos) |
48 | *pos=epos; |
49 | h->header[n]=0; |
50 | break; |
51 | } |
52 | if (pos) |
53 | ++*pos; |
54 | |
55 | h->header[n]=c; |
56 | if (c == '\n') |
57 | { |
58 | if (n == 0) |
59 | { |
60 | if (pos) |
61 | *pos=epos; |
62 | h->header[n]=0; |
63 | break; |
64 | } |
65 | |
66 | c=getc(f); |
67 | if (c != EOF) |
68 | ungetc(c, f); |
69 | if (c == '\n' || c == '\r' || |
70 | !isspace((int)(unsigned char)c)) |
71 | { |
72 | h->header[n]=0; |
73 | break; |
74 | } |
75 | } |
76 | n++; |
77 | if (h->maxsize && n + 2 > h->maxsize) |
78 | --n; |
79 | } |
80 | |
81 | if (n == 0) |
82 | { |
83 | if (pos) |
84 | *pos=epos; |
85 | h->value=h->header; |
86 | return (1); |
87 | } |
88 | |
89 | for (h->value=h->header; *h->value; ++h->value) |
90 | { |
91 | if (*h->value == ':') |
92 | { |
93 | *h->value++=0; |
94 | while (*h->value && |
95 | isspace((int)(unsigned char)*h->value)) |
96 | ++h->value; |
97 | break; |
98 | } |
99 | } |
100 | return (0); |
101 | } |
102 | |
103 | void rfc822hdr_fixname(struct rfc822hdr *h) |
104 | { |
105 | char *p; |
106 | |
107 | for (p=h->header; *p; p++) |
108 | { |
109 | *p=tolower((int)(unsigned char)*p); |
110 | } |
111 | } |
112 | |
113 | void rfc822hdr_collapse(struct rfc822hdr *h) |
114 | { |
115 | char *p, *q; |
116 | |
117 | for (p=q=h->value; *p; ) |
118 | { |
119 | if (*p == '\n') |
120 | { |
121 | while (*p && isspace((int)(unsigned char)*p)) |
122 | ++p; |
123 | *q++=' '; |
124 | continue; |
125 | } |
126 | *q++ = *p++; |
127 | } |
128 | *q=0; |
129 | } |