Commit | Line | Data |
---|---|---|
d9898ee8 | 1 | /* |
b0322a85 | 2 | ** Copyright 2001-2011 Double Precision, Inc. |
d9898ee8 | 3 | ** See COPYING for distribution information. |
4 | */ | |
5 | ||
b0322a85 | 6 | #include "config.h" |
d9898ee8 | 7 | #include <stdio.h> |
8 | #include <ctype.h> | |
9 | #include <stdlib.h> | |
10 | #include <string.h> | |
11 | #include "rfc822hdr.h" | |
12 | ||
d9898ee8 | 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 | } | |
8d138742 | 130 | |
b0322a85 CE |
131 | /* This is, basically, a case-insensitive US-ASCII comparison function */ |
132 | ||
133 | #define lc(x) ((x) >= 'A' && (x) <= 'Z' ? (x) + ('a'-'A'):(x)) | |
134 | ||
135 | int rfc822hdr_namecmp(const char *a, const char *b) | |
136 | { | |
137 | int rc; | |
138 | ||
139 | while ((rc=(int)(unsigned char)lc(*a) - (int)(unsigned char)lc(*b))==0) | |
140 | { | |
141 | if (!*a) | |
142 | return 0; | |
143 | ++a; | |
144 | ++b; | |
145 | } | |
146 | ||
147 | return rc; | |
148 | } | |
149 | ||
8d138742 CE |
150 | int rfc822hdr_is_addr(const char *hdr) |
151 | { | |
b0322a85 CE |
152 | return rfc822hdr_namecmp(hdr, "from") == 0 || |
153 | rfc822hdr_namecmp(hdr, "to") == 0 || | |
154 | rfc822hdr_namecmp(hdr, "cc") == 0 || | |
155 | rfc822hdr_namecmp(hdr, "bcc") == 0 || | |
156 | rfc822hdr_namecmp(hdr, "resent-from") == 0 || | |
157 | rfc822hdr_namecmp(hdr, "resent-to") == 0 || | |
158 | rfc822hdr_namecmp(hdr, "resent-cc") == 0 || | |
159 | rfc822hdr_namecmp(hdr, "resent-bcc") == 0; | |
8d138742 | 160 | } |