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a39cd89c7d6fbef0c8b3956e17483eb64d73a196
evolution/camel/camel-mime-utils.c
Dan Winship a39cd89c7d fix format specifier for time zone. Fix typo in month names array. 
* camel-mime-utils.c (header_format_date): fix format specifier
	for time zone. Fix typo in month names array.

svn path=/trunk/; revision=2640
2000-04-26 19:53:49 +00:00

2344 lines
50 KiB
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/*
* Copyright (C) 2000 Helix Code Inc.
*
* Authors: Michael Zucchi <notzed@helixcode.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unicode.h>
#include <glib.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include "camel-mime-utils.h"
#define d(x)
#define d2(x)
static char *base64_alphabet =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
static unsigned char tohex[16] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
static unsigned char camel_mime_special_table[256] = {
5, 5, 5, 5, 5, 5, 5, 5, 5,167, 7, 5, 5, 39, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
178,128,140,128,128,128,128,128,140,140,128,128,140,128,136,132,
128,128,128,128,128,128,128,128,128,128,204,140,140, 4,140,132,
140,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,
128,128,128,128,128,128,128,128,128,128,128,172,172,172,128,128,
128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,
128,128,128,128,128,128,128,128,128,128,128,128,128,128,128, 5,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
static unsigned char camel_mime_base64_rank[256] = {
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255, 62,255,255,255, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61,255,255,255, 0,255,255,
255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,255,255,255,255,255,
255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
};
/*
if any of these change, then the tables above should be regenerated
by compiling this with -DBUILD_TABLE, and running.
gcc -o buildtable `glib-config --cflags --libs` -DBUILD_TABLE camel-mime-utils.c
./buildtable
*/
enum {
IS_CTRL = 1<<0,
IS_LWSP = 1<<1,
IS_TSPECIAL = 1<<2,
IS_SPECIAL = 1<<3,
IS_SPACE = 1<<4,
IS_DSPECIAL = 1<<5,
IS_COLON = 1<<6, /* rather wasteful of space ... */
IS_QPSAFE = 1<<7
};
#define is_ctrl(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_CTRL) != 0)
#define is_lwsp(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_LWSP) != 0)
#define is_tspecial(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_TSPECIAL) != 0)
#define is_type(x, t) ((camel_mime_special_table[(unsigned char)(x)] & (t)) != 0)
#define is_ttoken(x) ((camel_mime_special_table[(unsigned char)(x)] & (IS_TSPECIAL|IS_LWSP|IS_CTRL)) == 0)
#define is_atom(x) ((camel_mime_special_table[(unsigned char)(x)] & (IS_SPECIAL|IS_SPACE|IS_CTRL)) == 0)
#define is_dtext(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_DSPECIAL) == 0)
#define is_fieldname(x) ((camel_mime_special_table[(unsigned char)(x)] & (IS_CTRL|IS_SPACE|IS_COLON)) == 0)
#define is_qpsafe(x) ((camel_mime_special_table[(unsigned char)(x)] & IS_QPSAFE) != 0)
/* only needs to be run to rebuild the tables above */
#ifdef BUILD_TABLE
#define CHARS_LWSP " \t\n\r"
#define CHARS_TSPECIAL "()<>@,;:\\\"/[]?="
#define CHARS_SPECIAL "()<>@,;:\\\".[]"
#define CHARS_CSPECIAL "()\\\r" /* not in comments */
#define CHARS_DSPECIAL "[]\\\r \t" /* not in domains */
static void
header_init_bits(unsigned char bit, unsigned char bitcopy, int remove, unsigned char *vals, int len)
{
int i;
if (!remove) {
for (i=0;i<len;i++) {
camel_mime_special_table[vals[i]] |= bit;
}
if (bitcopy) {
for (i=0;i<256;i++) {
if (camel_mime_special_table[i] & bitcopy)
camel_mime_special_table[i] |= bit;
}
}
} else {
for (i=0;i<256;i++)
camel_mime_special_table[i] |= bit;
for (i=0;i<len;i++) {
camel_mime_special_table[vals[i]] &= ~bit;
}
if (bitcopy) {
for (i=0;i<256;i++) {
if (camel_mime_special_table[i] & bitcopy)
camel_mime_special_table[i] &= ~bit;
}
}
}
}
static void
header_decode_init(void)
{
int i;
for (i=0;i<256;i++) camel_mime_special_table[i] = 0;
for (i=0;i<32;i++) camel_mime_special_table[i] |= IS_CTRL;
camel_mime_special_table[127] = IS_CTRL;
camel_mime_special_table[' '] = IS_SPACE;
camel_mime_special_table[':'] = IS_COLON;
header_init_bits(IS_LWSP, 0, 0, CHARS_LWSP, sizeof(CHARS_LWSP)-1);
header_init_bits(IS_TSPECIAL, IS_CTRL, 0, CHARS_TSPECIAL, sizeof(CHARS_TSPECIAL)-1);
header_init_bits(IS_SPECIAL, 0, 0, CHARS_SPECIAL, sizeof(CHARS_SPECIAL)-1);
header_init_bits(IS_DSPECIAL, 0, FALSE, CHARS_DSPECIAL, sizeof(CHARS_DSPECIAL)-1);
for (i=0;i<256;i++) if ((i>=33 && i<=60) || (i>=62 && i<=126) || i==32 || i==9) camel_mime_special_table[i] |= IS_QPSAFE;
}
void
base64_init(void)
{
int i;
memset(camel_mime_base64_rank, 0xff, sizeof(camel_mime_base64_rank));
for (i=0;i<64;i++) {
camel_mime_base64_rank[(unsigned int)base64_alphabet[i]] = i;
}
camel_mime_base64_rank['='] = 0;
}
int main(int argc, char **argv)
{
int i;
void run_test(void);
header_decode_init();
base64_init();
printf("static unsigned char camel_mime_special_table[256] = {\n\t");
for (i=0;i<256;i++) {
printf("%3d,", camel_mime_special_table[i]);
if ((i&15) == 15) {
printf("\n");
if (i!=255) {
printf("\t");
}
}
}
printf("};\n");
printf("static unsigned char camel_mime_base64_rank[256] = {\n\t");
for (i=0;i<256;i++) {
printf("%3d,", camel_mime_base64_rank[i]);
if ((i&15) == 15) {
printf("\n");
if (i!=255) {
printf("\t");
}
}
}
printf("};\n");
run_test();
return 0;
}
#endif
/* call this when finished encoding everything, to
flush off the last little bit */
int
base64_encode_close(unsigned char *in, int inlen, unsigned char *out, int *state, int *save)
{
int c1, c2;
unsigned char *outptr = out;
if (inlen>0)
outptr += base64_encode_step(in, inlen, outptr, state, save);
c1 = ((char *)save)[1];
c2 = ((char *)save)[2];
switch (((char *)save)[0]) {
case 2:
outptr[2] = base64_alphabet [ ( (c2 &0x0f) << 2 ) ];
goto skip;
case 1:
outptr[2] = '=';
skip:
outptr[0] = base64_alphabet [ c1 >> 2 ];
outptr[1] = base64_alphabet [ c2 >> 4 | ( (c1&0x3) << 4 )];
outptr[3] = '=';
outptr += 4;
break;
}
*outptr++ = '\n';
*save = 0;
*state = 0;
return outptr-out;
}
/*
performs an 'encode step', only encodes blocks of 3 characters to the
output at a time, saves left-over state in state and save (initialise to
0 on first invocation).
*/
int
base64_encode_step(unsigned char *in, int len, unsigned char *out, int *state, int *save)
{
register unsigned char *inptr, *outptr;
if (len<=0)
return 0;
inptr = in;
outptr = out;
d(printf("we have %d chars, and %d saved chars\n", len, ((char *)save)[0]));
if (len + ((char *)save)[0] > 2) {
unsigned char *inend = in+len-2;
register int c1, c2, c3;
register int already;
already = *state;
switch (((char *)save)[0]) {
case 1: c1 = ((char *)save)[1]; goto skip1;
case 2: c1 = ((char *)save)[1];
c2 = ((char *)save)[2]; goto skip2;
}
/* yes, we jump into the loop, no i'm not going to change it, its beautiful! */
while (inptr < inend) {
c1 = *inptr++;
skip1:
c2 = *inptr++;
skip2:
c3 = *inptr++;
*outptr++ = base64_alphabet [ c1 >> 2 ];
*outptr++ = base64_alphabet [ c2 >> 4 | ( (c1&0x3) << 4 ) ];
*outptr++ = base64_alphabet [ ( (c2 &0x0f) << 2 ) | (c3 >> 6) ];
*outptr++ = base64_alphabet [ c3 & 0x3f ];
/* this is a bit ugly ... */
if ((++already)>=19) {
*outptr++='\n';
already = 0;
}
}
((char *)save)[0] = 0;
len = 2-(inptr-inend);
*state = already;
}
d(printf("state = %d, len = %d\n",
(int)((char *)save)[0],
len));
if (len>0) {
register char *saveout;
/* points to the slot for the next char to save */
saveout = & (((char *)save)[1]) + ((char *)save)[0];
/* len can only be 0 1 or 2 */
switch(len) {
case 2: *saveout++ = *inptr++;
case 1: *saveout++ = *inptr++;
}
((char *)save)[0]+=len;
}
d(printf("mode = %d\nc1 = %c\nc2 = %c\n",
(int)((char *)save)[0],
(int)((char *)save)[1],
(int)((char *)save)[2]));
return outptr-out;
}
int
base64_decode_step(unsigned char *in, int len, unsigned char *out, int *state, unsigned int *save)
{
register unsigned char *inptr, *outptr;
unsigned char *inend, c;
register unsigned int v;
int i;
inend = in+len;
outptr = out;
/* convert 4 base64 bytes to 3 normal bytes */
v=*save;
i=*state;
inptr = in;
while (inptr<inend) {
c = camel_mime_base64_rank[*inptr++];
if (c != 0xff) {
v = (v<<6) | c;
i++;
if (i==4) {
*outptr++ = v>>16;
*outptr++ = v>>8;
*outptr++ = v;
i=0;
}
}
}
*save = v;
*state = i;
/* quick scan back for '=' on the end somewhere */
/* fortunately we can drop 1 output char for each trailing = (upto 2) */
i=2;
while (inptr>in && i) {
inptr--;
if (camel_mime_base64_rank[*inptr] != 0xff) {
if (*inptr == '=')
outptr--;
i--;
}
}
/* if i!= 0 then there is a truncation error! */
return outptr-out;
}
int
quoted_encode_close(unsigned char *in, int len, unsigned char *out, int *state, int *save)
{
register unsigned char *outptr = out;
if (len>0)
outptr += quoted_encode_step(in, len, outptr, state, save);
/* hmm, not sure if this should really be added here, we dont want
to add it to the content, afterall ...? */
*outptr++ = '\n';
*save = 0;
*state = 0;
return outptr-out;
}
/*
FIXME: does not handle trailing spaces/tabs before end of line
*/
int
quoted_encode_step(unsigned char *in, int len, unsigned char *out, int *state, int *save)
{
register unsigned char *inptr, *outptr, *inend;
unsigned char c;
register int sofar = *state;
inptr = in;
inend = in+len;
outptr = out;
while (inptr<inend) {
c = *inptr++;
if (is_qpsafe(c)) {
/* check for soft line-break */
if ((++sofar)>74) {
*outptr++='=';
*outptr++='\n';
sofar = 1;
}
*outptr++=c;
} else {
if ((++sofar)>72) {
*outptr++='=';
*outptr++='\n';
sofar = 3;
}
*outptr++ = '=';
*outptr++ = tohex[(c>>4) & 0xf];
*outptr++ = tohex[c & 0xf];
}
}
*state = sofar;
return outptr-out;
}
/*
FIXME: this does not strip trailing spaces from lines (as it should, rfc 2045, section 6.7)
Should it also canonicalise the end of line to CR LF??
Note: Trailing rubbish (at the end of input), like = or =x or =\r will be lost.
*/
int
quoted_decode_step(unsigned char *in, int len, unsigned char *out, int *savestate, int *saveme)
{
register unsigned char *inptr, *outptr;
unsigned char *inend, c;
int state, save;
inend = in+len;
outptr = out;
d(printf("quoted-printable, decoding text '%.*s'\n", len, in));
state = *savestate;
save = *saveme;
inptr = in;
while (inptr<inend) {
switch (state) {
case 0:
while (inptr<inend) {
c = *inptr++;
/* FIXME: use a specials table to avoid 3 comparisons for the common case */
if (c=='=') {
state = 1;
break;
}
#ifdef CANONICALISE_EOL
/*else if (c=='\r') {
state = 3;
} else if (c=='\n') {
*outptr++ = '\r';
*outptr++ = c;
} */
#endif
else {
*outptr++ = c;
}
}
break;
case 1:
c = *inptr++;
if (c=='\n') {
/* soft break ... unix end of line */
state = 0;
} else {
save = c;
state = 2;
}
break;
case 2:
c = *inptr++;
if (isxdigit(c) && isxdigit(save)) {
c = toupper(c);
save = toupper(save);
*outptr++ = (((save>='A'?save-'A'+10:save-'0')&0x0f) << 4)
| ((c>='A'?c-'A'+10:c-'0')&0x0f);
} else if (c=='\n' && save == '\r') {
/* soft break ... canonical end of line */
} else {
/* just output the data */
*outptr++ = '=';
*outptr++ = save;
*outptr++ = c;
}
state = 0;
break;
#ifdef CANONICALISE_EOL
case 3:
/* convert \r -> to \r\n, leaves \r\n alone */
c = *inptr++;
if (c=='\n') {
*outptr++ = '\r';
*outptr++ = c;
} else {
*outptr++ = '\r';
*outptr++ = '\n';
*outptr++ = c;
}
state = 0;
break;
#endif
}
}
*savestate = state;
*saveme = save;
return outptr-out;
}
/*
this is for the "Q" encoding of international words,
which is slightly different than plain quoted-printable
*/
static int
quoted_decode(const unsigned char *in, int len, unsigned char *out)
{
register const unsigned char *inptr;
register unsigned char *outptr;
unsigned const char *inend;
unsigned char c, c1;
int ret = 0;
inend = in+len;
outptr = out;
d(printf("decoding text '%.*s'\n", len, in));
inptr = in;
while (inptr<inend) {
c = *inptr++;
if (c=='=') {
/* silently ignore truncated data? */
if (inend-in>=2) {
c = toupper(*inptr++);
c1 = toupper(*inptr++);
*outptr++ = (((c>='A'?c-'A'+10:c-'0')&0x0f) << 4)
| ((c1>='A'?c1-'A'+10:c1-'0')&0x0f);
} else {
ret = -1;
break;
}
} else if (c=='_') {
*outptr++ = 0x20;
} else if (c==' ' || c==0x09) {
/* FIXME: this is an error! ignore for now ... */
ret = -1;
break;
} else {
*outptr++ = c;
}
}
if (ret==0) {
return outptr-out;
}
return -1;
}
/* rfc2047 version of quoted-printable */
static int
quoted_encode(const unsigned char *in, int len, unsigned char *out)
{
register const unsigned char *inptr, *inend;
unsigned char *outptr;
unsigned char c;
inptr = in;
inend = in+len;
outptr = out;
while (inptr<inend) {
c = *inptr++;
if (is_qpsafe(c) && !(c=='_' || c=='?')) {
if (c==' ')
c='_';
*outptr++=c;
} else {
*outptr++ = '=';
*outptr++ = tohex[(c>>4) & 0xf];
*outptr++ = tohex[c & 0xf];
}
}
printf("encoding '%.*s' = '%.*s'\n", len, in, outptr-out, out);
return outptr-out;
}
static void
header_decode_lwsp(const char **in)
{
const char *inptr = *in;
char c;
d2(printf("is ws: '%s'\n", *in));
while (is_lwsp(*inptr) || *inptr =='(') {
while (is_lwsp(*inptr)) {
d2(printf("(%c)", *inptr));
inptr++;
}
d2(printf("\n"));
/* check for comments */
if (*inptr == '(') {
int depth = 1;
inptr++;
while (depth && (c=*inptr)) {
if (c=='\\' && inptr[1]) {
inptr++;
} else if (c=='(') {
depth++;
} else if (c==')') {
depth--;
}
inptr++;
}
}
}
*in = inptr;
}
/* decode rfc 2047 encoded string segment */
static char *
rfc2047_decode_word(const char *in, int len)
{
const char *inptr = in+2;
const char *inend = in+len-2;
char *encname;
int tmplen;
int ret;
char *decword = NULL;
char *decoded = NULL;
char *outbase = NULL;
char *inbuf, *outbuf;
int inlen, outlen;
unicode_iconv_t ic;
d(printf("decoding '%.*s'\n", len, in));
/* just make sure we're not passed shit */
if (len<7
|| !(in[0]=='=' && in[1]=='?' && in[len-1]=='=' && in[len-2]=='?')) {
d(printf("invalid\n"));
return NULL;
}
inptr = memchr(inptr, '?', inend-inptr);
if (inptr!=NULL
&& inptr<inend+2
&& inptr[2]=='?') {
inptr++;
tmplen = inend-inptr-2;
decword = g_malloc(tmplen); /* this will always be more-than-enough room */
switch(toupper(inptr[0])) {
case 'Q':
inlen = quoted_decode(inptr+2, tmplen, decword);
break;
case 'B': {
int state=0;
unsigned int save=0;
inlen = base64_decode_step((char *)inptr+2, tmplen, decword, &state, &save);
/* if state != 0 then error? */
break;
}
}
if (inlen>0) {
/* yuck, all this snot is to setup iconv! */
tmplen = inptr-in-3;
encname = alloca(tmplen+1);
encname[tmplen]=0;
memcpy(encname, in+2, tmplen);
inbuf = decword;
outlen = inlen*6;
outbase = g_malloc(outlen);
outbuf = outbase;
ic = unicode_iconv_open("utf-8", encname);
ret = unicode_iconv(ic, (const char **)&inbuf, &inlen, &outbuf, &outlen);
unicode_iconv_close(ic);
if (ret>=0) {
*outbuf = 0;
decoded = outbase;
outbase = NULL;
}
}
}
free(outbase);
free(decword);
d(printf("decoded '%s'\n", decoded));
return decoded;
}
/* grrr, glib should have this ! */
static GString *
g_string_append_len(GString *st, const char *s, int l)
{
char *tmp;
tmp = alloca(l+1);
tmp[l]=0;
memcpy(tmp, s, l);
return g_string_append(st, tmp);
}
/* decodes a simple text, rfc822 */
static char *
header_decode_text(const char *in, int inlen)
{
GString *out;
const char *inptr = in;
const char *inend = in+inlen;
char *encstart, *encend;
char *decword;
out = g_string_new("");
while ( (encstart = strstr(inptr, "=?"))
&& (encend = strstr(encstart+2, "?=")) ) {
decword = rfc2047_decode_word(encstart, encend-encstart+2);
if (decword) {
g_string_append_len(out, inptr, encstart-inptr);
g_string_append_len(out, decword, strlen(decword));
free(decword);
} else {
g_string_append_len(out, inptr, encend-inptr+2);
}
inptr = encend+2;
}
g_string_append_len(out, inptr, inend-inptr);
encstart = out->str;
g_string_free(out, FALSE);
return encstart;
}
char *
header_decode_string(const char *in)
{
if (in == NULL)
return NULL;
return header_decode_text(in, strlen(in));
}
static char *encoding_map[] = {
"US-ASCII",
"ISO-8859-1",
"UTF-8"
};
/* FIXME: needs a way to cache iconv opens for different charsets? */
static
char *rfc2047_encode_word(const char *in, int len, char *type)
{
unicode_iconv_t ic;
char *buffer, *out, *ascii;
size_t inlen, outlen, enclen;
printf("Converting '%.*s' to %s\n", len, in, type);
/* convert utf8->encoding */
outlen = len*6;
buffer = alloca(outlen);
inlen = len;
out = buffer;
/* if we can't convert from utf-8, just encode as utf-8 */
if (!strcasecmp(type, "UTF-8")
|| (ic = unicode_iconv_open(type, "UTF-8")) == (unicode_iconv_t)-1) {
memcpy(buffer, in, len);
out = buffer+len;
type = "UTF-8";
} else {
if (unicode_iconv(ic, &in, &inlen, &out, &outlen) == -1) {
g_warning("Conversion problem: conversion truncated: %s", strerror(errno));
}
unicode_iconv_close(ic);
}
enclen = out-buffer;
/* now create qp version */
ascii = alloca(enclen*3 + strlen(type) + 8);
out = ascii;
/* should determine which encoding is smaller, and use that? */
out += sprintf(out, "=?%s?Q?", type);
out += quoted_encode(buffer, enclen, out);
sprintf(out, "?=");
printf("converted = %s\n", ascii);
return g_strdup(ascii);
}
/* TODO: Should this worry about quotes?? */
char *
header_encode_string(const unsigned char *in)
{
GString *out;
const unsigned char *inptr = in, *start;
int encoding;
char *outstr;
if (in == NULL)
return NULL;
/* do a quick us-ascii check (the common case?) */
while (*inptr) {
if (*inptr > 127)
break;
inptr++;
}
if (*inptr == 0)
return g_strdup(in);
/* This gets each word out of the input, and checks to see what charset
can be used to encode it. */
/* TODO: Work out when to merge subsequent words, or across word-parts */
/* FIXME: Make sure a converted word is less than the encoding size */
out = g_string_new("");
inptr = in;
encoding = 0;
start = inptr;
while (inptr && *inptr) {
unicode_char_t c;
const char *newinptr;
newinptr = unicode_get_utf8(inptr, &c);
if (newinptr == NULL) {
g_warning("Invalid UTF-8 sequence encountered (pos %d, char '%c'): %s", (inptr-in), inptr[0], in);
inptr++;
continue;
}
inptr = newinptr;
if (unicode_isspace(c)) {
if (encoding == 0) {
g_string_append_len(out, start, inptr-start);
} else {
char *text = rfc2047_encode_word(start, inptr-start-1, encoding_map[encoding]);
g_string_append(out, text);
g_string_append_c(out, c);
g_free(text);
}
start = inptr;
encoding = 0;
} else if (c>127 && c < 256) {
encoding = MAX(encoding, 1);
} else if (c >=256) {
encoding = MAX(encoding, 2);
}
}
if (inptr-start) {
if (encoding == 0) {
g_string_append_len(out, start, inptr-start);
} else {
char *text = rfc2047_encode_word(start, inptr-start, encoding_map[encoding]);
g_string_append(out, text);
g_free(text);
}
}
outstr = out->str;
g_string_free(out, FALSE);
return outstr;
}
/* these are all internal parser functions */
static char *
decode_token(const char **in)
{
const char *inptr = *in;
const char *start;
header_decode_lwsp(&inptr);
start = inptr;
while (is_ttoken(*inptr))
inptr++;
if (inptr>start) {
*in = inptr;
return g_strndup(start, inptr-start);
} else {
return NULL;
}
}
char *
header_token_decode(const char *in)
{
if (in == NULL)
return NULL;
return decode_token(&in);
}
/*
<"> * ( <any char except <"> \, cr / \ <any char> ) <">
*/
static char *
header_decode_quoted_string(const char **in)
{
const char *inptr = *in;
char *out = NULL, *outptr;
int outlen;
int c;
header_decode_lwsp(&inptr);
if (*inptr == '"') {
const char *intmp;
int skip = 0;
/* first, calc length */
inptr++;
intmp = inptr;
while ( (c = *intmp++) && c!= '"' ) {
if (c=='\\' && *intmp) {
intmp++;
skip++;
}
}
outlen = intmp-inptr-skip;
out = outptr = g_malloc(outlen+1);
while ( (c = *inptr++) && c!= '"' ) {
if (c=='\\' && *inptr) {
c = *inptr++;
}
*outptr++ = c;
}
*outptr = 0;
}
*in = inptr;
return out;
}
static char *
header_decode_atom(const char **in)
{
const char *inptr = *in, *start;
header_decode_lwsp(&inptr);
start = inptr;
while (is_atom(*inptr))
inptr++;
*in = inptr;
if (inptr > start)
return g_strndup(start, inptr-start);
else
return NULL;
}
static char *
header_decode_word(const char **in)
{
const char *inptr = *in;
header_decode_lwsp(&inptr);
if (*inptr == '"') {
*in = inptr;
return header_decode_quoted_string(in);
} else {
*in = inptr;
return header_decode_atom(in);
}
}
static char *
header_decode_value(const char **in)
{
const char *inptr = *in;
header_decode_lwsp(&inptr);
if (*inptr == '"') {
d(printf("decoding quoted string\n"));
return header_decode_quoted_string(in);
} else if (is_ttoken(*inptr)) {
d(printf("decoding token\n"));
/* this may not have the right specials for all params? */
return decode_token(in);
}
return NULL;
}
/* shoudl this return -1 for no int? */
static int
header_decode_int(const char **in)
{
const char *inptr = *in;
int c, v=0;
header_decode_lwsp(&inptr);
while ( (c=*inptr++ & 0xff)
&& isdigit(c) ) {
v = v*10+(c-'0');
}
*in = inptr-1;
return v;
}
static int
header_decode_param(const char **in, char **paramp, char **valuep)
{
const char *inptr = *in;
char *param, *value=NULL;
param = decode_token(&inptr);
header_decode_lwsp(&inptr);
if (*inptr == '=') {
inptr++;
value = header_decode_value(&inptr);
}
if (param && value) {
*paramp = param;
*valuep = value;
*in = inptr;
return 0;
} else {
g_free(param);
g_free(value);
return 1;
}
}
char *
header_param(struct _header_param *p, const char *name)
{
while (p && strcasecmp(p->name, name) != 0)
p = p->next;
if (p)
return p->value;
return NULL;
}
struct _header_param *
header_set_param(struct _header_param **l, const char *name, const char *value)
{
struct _header_param *p = (struct _header_param *)l, *pn;
while (p->next) {
pn = p->next;
if (!strcasecmp(pn->name, name)) {
g_free(pn->value);
if (value) {
pn->value = g_strdup(value);
return pn;
} else {
p->next = pn->next;
g_free(pn);
return NULL;
}
}
p = pn;
}
if (value == NULL)
return NULL;
pn = g_malloc(sizeof(*pn));
pn->next = 0;
pn->name = g_strdup(name);
pn->value = g_strdup(value);
p->next = pn;
return pn;
}
const char *
header_content_type_param(struct _header_content_type *t, const char *name)
{
if (t==NULL)
return NULL;
return header_param(t->params, name);
}
void header_content_type_set_param(struct _header_content_type *t, const char *name, const char *value)
{
header_set_param(&t->params, name, value);
}
/**
* header_content_type_is:
* @ct: A content type specifier, or #NULL.
* @type: A type to check against.
* @subtype: A subtype to check against, or "*" to match any subtype.
*
* Returns #TRUE if the content type @ct is of type @type/@subtype.
* The subtype of "*" will match any subtype. If @ct is #NULL, then
* it will match the type "text/plain".
*
* Return value: #TRUE or #FALSE depending on the matching of the type.
**/
int
header_content_type_is(struct _header_content_type *ct, const char *type, const char *subtype)
{
/* no type == text/plain or text/"*" */
if (ct==NULL) {
return (!strcasecmp(type, "text")
&& (!strcasecmp(subtype, "plain")
|| !strcasecmp(subtype, "*")));
}
return (ct->type != NULL
&& (!strcasecmp(ct->type, type)
&& ((ct->subtype != NULL
&& !strcasecmp(ct->subtype, subtype))
|| !strcasecmp("*", subtype))));
}
void
header_param_list_free(struct _header_param *p)
{
struct _header_param *n;
while (p) {
n = p->next;
g_free(p->name);
g_free(p->value);
g_free(p);
p = n;
}
}
struct _header_content_type *
header_content_type_new(const char *type, const char *subtype)
{
struct _header_content_type *t = g_malloc(sizeof(*t));
t->type = g_strdup(type);
t->subtype = g_strdup(subtype);
t->params = NULL;
t->refcount = 1;
return t;
}
void
header_content_type_ref(struct _header_content_type *ct)
{
if (ct)
ct->refcount++;
}
void
header_content_type_unref(struct _header_content_type *ct)
{
if (ct) {
if (ct->refcount <= 1) {
header_param_list_free(ct->params);
g_free(ct->type);
g_free(ct->subtype);
g_free(ct);
} else {
ct->refcount--;
}
}
}
/* for decoding email addresses, canonically */
static char *
header_decode_domain(const char **in)
{
const char *inptr = *in, *start;
int go = TRUE;
char *ret;
GString *domain = g_string_new("");
/* domain ref | domain literal */
header_decode_lwsp(&inptr);
while (go) {
if (*inptr == '[') { /* domain literal */
g_string_append(domain, "[ ");
inptr++;
header_decode_lwsp(&inptr);
start = inptr;
while (is_dtext(*inptr)) {
g_string_append_c(domain, *inptr);
inptr++;
}
if (*inptr == ']') {
g_string_append(domain, " ]");
inptr++;
} else {
g_warning("closing ']' not found in domain: %s", *in);
}
} else {
char *a = header_decode_atom(&inptr);
if (a) {
g_string_append(domain, a);
} else {
g_warning("missing atom from domain-ref");
break;
}
}
header_decode_lwsp(&inptr);
if (*inptr == '.') { /* next sub-domain? */
g_string_append_c(domain, '.');
inptr++;
header_decode_lwsp(&inptr);
} else
go = FALSE;
}
*in = inptr;
ret = domain->str;
g_string_free(domain, FALSE);
return ret;
}
static char *
header_decode_addrspec(const char **in)
{
const char *inptr = *in;
char *word;
GString *addr = g_string_new("");
header_decode_lwsp(&inptr);
/* addr-spec */
word = header_decode_word(&inptr);
if (word) {
g_string_append(addr, word);
header_decode_lwsp(&inptr);
while (*inptr == '.' && word) {
inptr++;
g_string_append_c(addr, '.');
word = header_decode_word(&inptr);
if (word) {
g_string_append(addr, word);
header_decode_lwsp(&inptr);
} else {
g_warning("Invalid address spec: %s", *in);
}
}
if (*inptr == '@') {
inptr++;
g_string_append_c(addr, '@');
word = header_decode_domain(&inptr);
if (word) {
g_string_append(addr, word);
} else {
g_warning("Invalid address, missing domain: %s", *in);
}
} else {
g_warning("Invalid addr-spec, missing @: %s", *in);
}
} else {
g_warning("invalid addr-spec, no local part");
}
/* FIXME: return null on error? */
*in = inptr;
word = addr->str;
g_string_free(addr, FALSE);
return word;
}
/*
address:
word *('.' word) @ domain |
*(word) '<' [ *('@' domain ) ':' ] word *( '.' word) @ domain |
1*word ':' [ word ... etc (mailbox, as above) ] ';'
*/
/* mailbox:
word *( '.' word ) '@' domain
*(word) '<' [ *('@' domain ) ':' ] word *( '.' word) @ domain
*/
static struct _header_address *
header_decode_mailbox(const char **in)
{
const char *inptr = *in;
char *pre;
int closeme = FALSE;
GString *addr;
GString *name = NULL;
struct _header_address *address = NULL;
addr = g_string_new("");
/* for each address */
pre = header_decode_word(&inptr);
header_decode_lwsp(&inptr);
if (!(*inptr == '.' || *inptr == '@' || *inptr==',' || *inptr=='\0')) { /* ',' and '\0' required incase it is a simple address, no @ domain part (buggy writer) */
name = g_string_new("");
while (pre) {
char *text;
text = header_decode_string(pre);
g_string_append(name, text);
g_free(pre);
/* rfc_decode(pre) */
pre = header_decode_word(&inptr);
if (pre)
g_string_append_c(name, ' ');
}
header_decode_lwsp(&inptr);
if (*inptr == '<') {
closeme = TRUE;
inptr++;
header_decode_lwsp(&inptr);
if (*inptr == '@') {
while (*inptr == '@') {
inptr++;
header_decode_domain(&inptr);
header_decode_lwsp(&inptr);
if (*inptr == ',') {
inptr++;
header_decode_lwsp(&inptr);
}
}
if (*inptr == ':') {
inptr++;
} else {
g_warning("broken route-address, missing ':': %s", *in);
}
}
pre = header_decode_word(&inptr);
header_decode_lwsp(&inptr);
} else {
g_warning("broken address? %s", *in);
}
}
if (pre) {
g_string_append(addr, pre);
} else {
g_warning("No local-part for email address: %s", *in);
}
/* should be at word '.' localpart */
while (*inptr == '.' && pre) {
inptr++;
g_free(pre);
pre = header_decode_word(&inptr);
g_string_append_c(addr, '.');
g_string_append(addr, pre);
header_decode_lwsp(&inptr);
}
g_free(pre);
/* now at '@' domain part */
if (*inptr == '@') {
char *dom;
inptr++;
g_string_append_c(addr, '@');
dom = header_decode_domain(&inptr);
g_string_append(addr, dom);
} else {
g_warning("invalid address, no '@' domain part at %c: %s", *inptr, *in);
}
if (closeme) {
header_decode_lwsp(&inptr);
if (*inptr == '>') {
inptr++;
} else {
g_warning("invalid route address, no closing '>': %s", *in);
}
} else if (name == NULL) { /* check for comment after address */
char *text, *tmp;
const char *comment = inptr;
header_decode_lwsp(&inptr);
if (inptr-comment > 3) { /* just guess ... */
tmp = g_strndup(comment, inptr-comment);
text = header_decode_string(tmp);
name = g_string_new(text);
g_free(tmp);
g_free(text);
}
}
*in = inptr;
if (addr->len > 0) {
address = header_address_new_name(name?name->str:"", addr->str);
}
g_string_free(addr, TRUE);
if (name)
g_string_free(name, TRUE);
d(printf("got mailbox: %s\n", addr->str));
return address;
}
static struct _header_address *
header_decode_address(const char **in)
{
const char *inptr = *in;
char *pre;
GString *group = g_string_new("");
struct _header_address *addr = NULL, *member;
/* pre-scan, trying to work out format, discard results */
header_decode_lwsp(&inptr);
while ( (pre = header_decode_word(&inptr)) ) {
g_string_append(group, pre);
g_string_append(group, " ");
g_free(pre);
}
header_decode_lwsp(&inptr);
if (*inptr == ':') {
d(printf("group detected: %s\n", group->str));
addr = header_address_new_group(group->str);
/* that was a group spec, scan mailbox's */
inptr++;
/* FIXME: check rfc 2047 encodings of words, here or above in the loop */
header_decode_lwsp(&inptr);
if (*inptr != ';') {
int go = TRUE;
do {
member = header_decode_mailbox(&inptr);
if (member)
header_address_add_member(addr, member);
header_decode_lwsp(&inptr);
if (*inptr == ',')
inptr++;
else
go = FALSE;
} while (go);
if (*inptr == ';') {
inptr++;
} else {
g_warning("Invalid group spec, missing closing ';': %s", *in);
}
} else {
inptr++;
}
*in = inptr;
} else {
addr = header_decode_mailbox(in);
}
g_string_free(group, TRUE);
return addr;
}
char *
header_msgid_decode(const char *in)
{
const char *inptr = in;
char *msgid = NULL;
d(printf("decoding Message-ID: '%s'\n", in));
if (in == NULL)
return NULL;
header_decode_lwsp(&inptr);
if (*inptr == '<') {
inptr++;
header_decode_lwsp(&inptr);
msgid = header_decode_addrspec(&inptr);
if (msgid) {
header_decode_lwsp(&inptr);
if (*inptr == '>') {
inptr++;
} else {
g_warning("Missing closing '>' on message id: %s", in);
}
} else {
g_warning("Cannot find message id in: %s", in);
}
} else {
g_warning("missing opening '<' on message id: %s", in);
}
if (msgid) {
d(printf("Got message id: %s\n", msgid));
}
return msgid;
}
struct _header_address *
header_mailbox_decode(const char *in)
{
if (in == NULL)
return NULL;
return header_decode_mailbox(&in);
}
struct _header_address *
header_address_decode(const char *in)
{
const char *inptr = in, *last;
struct _header_address *list = NULL, *addr;
d(printf("decoding To: '%s'\n", in));
#warning header_to_decode needs to return some structure
if (in == NULL)
return NULL;
do {
last = inptr;
addr = header_decode_address(&inptr);
if (addr)
header_address_list_append(&list, addr);
header_decode_lwsp(&inptr);
if (*inptr == ',')
inptr++;
else
break;
} while (inptr != last);
if (*inptr) {
g_warning("Invalid input detected at %c (%d): %s\n or at: %s", *inptr, inptr-in, in, inptr);
}
if (inptr == last) {
g_warning("detected invalid input loop at : %s", last);
}
return list;
}
void
header_mime_decode(const char *in, int *maj, int *min)
{
const char *inptr = in;
int major=-1, minor=-1;
d(printf("decoding MIME-Version: '%s'\n", in));
if (in != NULL) {
header_decode_lwsp(&inptr);
if (isdigit(*inptr)) {
major = header_decode_int(&inptr);
header_decode_lwsp(&inptr);
if (*inptr == '.') {
inptr++;
header_decode_lwsp(&inptr);
if (isdigit(*inptr))
minor = header_decode_int(&inptr);
}
}
}
if (maj)
*maj = major;
if (min)
*min = minor;
d(printf("major = %d, minor = %d\n", major, minor));
}
static struct _header_param *
header_param_list_decode(const char **in)
{
const char *inptr = *in;
struct _header_param *head = NULL, *tail = NULL;
header_decode_lwsp(&inptr);
while (*inptr == ';') {
char *param, *value;
struct _header_param *p;
inptr++;
/* invalid format? */
if (header_decode_param(&inptr, &param, &value) != 0)
break;
p = g_malloc(sizeof(*p));
p->name = param;
p->value = value;
p->next = NULL;
if (head == NULL)
head = p;
if (tail)
tail->next = p;
tail = p;
header_decode_lwsp(&inptr);
}
*in = inptr;
return head;
}
static void
header_param_list_format_append(GString *out, struct _header_param *p)
{
int len = out->len;
while (p) {
int here = out->len;
if (len+strlen(p->name)+strlen(p->value)>60) {
g_string_append(out, "\n\t");
len = 0;
}
/* FIXME: format the value properly */
g_string_sprintfa(out, " ; %s=\"%s\"", p->name, p->value);
len += (out->len - here);
p = p->next;
}
}
struct _header_content_type *
header_content_type_decode(const char *in)
{
const char *inptr = in;
char *type, *subtype = NULL;
struct _header_content_type *t = NULL;
if (in==NULL)
return NULL;
type = decode_token(&inptr);
header_decode_lwsp(&inptr);
if (type) {
if (*inptr == '/') {
inptr++;
subtype = decode_token(&inptr);
}
if (subtype == NULL && (!strcasecmp(type, "text"))) {
g_warning("text type with no subtype, resorting to text/plain: %s", in);
subtype = g_strdup("plain");
}
if (subtype == NULL) {
g_warning("MIME type with no subtype: %s", in);
}
t = header_content_type_new(type, subtype);
t->params = header_param_list_decode(&inptr);
} else {
g_free(type);
d(printf("cannot find MIME type in header (2) '%s'", in));
}
return t;
}
void
header_content_type_dump(struct _header_content_type *ct)
{
struct _header_param *p;
printf("Content-Type: ");
if (ct==NULL) {
printf("<NULL>\n");
return;
}
printf("%s / %s", ct->type, ct->subtype);
p = ct->params;
if (p) {
while (p) {
printf(";\n\t%s=\"%s\"", p->name, p->value);
p = p->next;
}
}
printf("\n");
}
char *
header_content_type_format(struct _header_content_type *ct)
{
GString *out;
char *ret;
if (ct==NULL)
return NULL;
out = g_string_new("");
if (ct->type == NULL) {
g_string_sprintfa(out, "text/plain");
g_warning("Content-Type with no main type");
} else if (ct->subtype == NULL) {
g_warning("Content-Type with no sub type: %s", ct->type);
if (!strcasecmp(ct->type, "multipart"))
g_string_sprintfa(out, "%s/mixed", ct->type);
else
g_string_sprintfa(out, "%s", ct->type);
} else {
g_string_sprintfa(out, "%s/%s", ct->type, ct->subtype);
}
header_param_list_format_append(out, ct->params);
ret = out->str;
g_string_free(out, FALSE);
return ret;
}
char *
header_content_encoding_decode(const char *in)
{
if (in)
return decode_token(&in);
return NULL;
}
CamelMimeDisposition *header_disposition_decode(const char *in)
{
CamelMimeDisposition *d = NULL;
const char *inptr = in;
if (in == NULL)
return NULL;
d = g_malloc(sizeof(*d));
d->refcount = 1;
d->disposition = decode_token(&inptr);
if (d->disposition == NULL)
g_warning("Empty disposition type");
d->params = header_param_list_decode(&inptr);
return d;
}
void header_disposition_ref(CamelMimeDisposition *d)
{
if (d)
d->refcount++;
}
void header_disposition_unref(CamelMimeDisposition *d)
{
if (d) {
if (d->refcount<=1) {
header_param_list_free(d->params);
g_free(d->disposition);
g_free(d);
} else {
d->refcount--;
}
}
}
char *header_disposition_format(CamelMimeDisposition *d)
{
GString *out;
char *ret;
if (d==NULL)
return NULL;
out = g_string_new("");
if (d->disposition)
g_string_append(out, d->disposition);
else
g_string_append(out, "attachment");
header_param_list_format_append(out, d->params);
ret = out->str;
g_string_free(out, FALSE);
return ret;
}
/* hrm, is there a library for this shit? */
static struct {
char *name;
int offset;
} tz_offsets [] = {
{ "UT", 0 },
{ "GMT", 0 },
{ "EST", -500 }, /* these are all US timezones. bloody yanks */
{ "EDT", -400 },
{ "CST", -600 },
{ "CDT", -500 },
{ "MST", -700 },
{ "MDT", -600 },
{ "PST", -800 },
{ "PDT", -700 },
{ "Z", 0 },
{ "A", -100 },
{ "M", -1200 },
{ "N", 100 },
{ "Y", 1200 },
};
static char *tz_months [] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
char *
header_format_date(time_t time, int offset)
{
struct tm tm;
d(printf("offset = %d\n", offset));
d(printf("converting date %s", ctime(&time)));
time += ((offset / 100) * (60*60)) + (offset % 100)*60;
d(printf("converting date %s", ctime(&time)));
memcpy(&tm, gmtime(&time), sizeof(tm));
return g_strdup_printf("%02d %s %04d %02d:%02d:%02d %+05d",
tm.tm_mday, tz_months[tm.tm_mon],
tm.tm_year + 1900,
tm.tm_hour, tm.tm_min, tm.tm_sec,
offset);
}
/* convert a date to time_t representation */
/* this is an awful mess oh well */
time_t
header_decode_date(const char *in, int *saveoffset)
{
const char *inptr = in;
char *monthname;
int year, offset = 0;
struct tm tm;
int i;
time_t t;
if (in == NULL) {
if (*saveoffset)
*saveoffset = 0;
return 0;
}
d(printf("\ndecoding date '%s'\n", inptr));
memset(&tm, 0, sizeof(tm));
header_decode_lwsp(&inptr);
if (!isdigit(*inptr)) {
char *day = decode_token(&inptr);
/* we dont really care about the day, its only for display */
if (day) {
d(printf("got day: %s\n", day));
g_free(day);
header_decode_lwsp(&inptr);
if (*inptr == ',')
inptr++;
else
g_warning("day not followed by ','");
}
}
tm.tm_mday = header_decode_int(&inptr);
monthname = decode_token(&inptr);
if (monthname) {
for (i=0;i<sizeof(tz_months)/sizeof(tz_months[0]);i++) {
if (!strcasecmp(tz_months[i], monthname)) {
tm.tm_mon = i;
break;
}
}
g_free(monthname);
}
year = header_decode_int(&inptr);
if (year<100) {
tm.tm_year = year;
} else {
tm.tm_year = year-1900;
}
/* get the time ... yurck */
tm.tm_hour = header_decode_int(&inptr);
header_decode_lwsp(&inptr);
if (*inptr == ':')
inptr++;
tm.tm_min = header_decode_int(&inptr);
header_decode_lwsp(&inptr);
if (*inptr == ':')
inptr++;
tm.tm_sec = header_decode_int(&inptr);
header_decode_lwsp(&inptr);
if (*inptr == '+'
|| *inptr == '-') {
offset = (*inptr++)=='-'?-1:1;
offset = offset * header_decode_int(&inptr);
d(printf("abs signed offset = %d\n", offset));
} else if (isdigit(*inptr)) {
offset = header_decode_int(&inptr);
d(printf("abs offset = %d\n", offset));
} else {
char *tz = decode_token(&inptr);
if (tz) {
for (i=0;i<sizeof(tz_offsets)/sizeof(tz_offsets[0]);i++) {
if (!strcasecmp(tz_offsets[i].name, tz)) {
offset = tz_offsets[i].offset;
break;
}
}
g_free(tz);
}
/* some broken mailers seem to put in things like GMT+1030 instead of just +1030 */
header_decode_lwsp(&inptr);
if (*inptr == '+' || *inptr == '-') {
int sign = (*inptr++)=='-'?-1:1;
offset = offset + (header_decode_int(&inptr)*sign);
}
d(printf("named offset = %d\n", offset));
}
t = mktime(&tm);
#if defined(HAVE_TIMEZONE)
t -= timezone;
#elif defined(HAVE_TM_GMTOFF)
t += tm.tm_gmtoff;
#else
#error Neither HAVE_TIMEZONE nor HAVE_TM_GMTOFF defined. Rerun autoheader, autoconf, etc.
#endif
/* t is now GMT of the time we want, but not offset by the timezone ... */
d(printf(" gmt normalized? = %s\n", ctime(&t)));
/* this should convert the time to the GMT equiv time */
t -= ( (offset/100) * 60*60) + (offset % 100)*60;
d(printf(" gmt normalized for timezone? = %s\n", ctime(&t)));
d({
char *tmp;
tmp = header_format_date(t, offset);
printf(" encoded again: %s\n", tmp);
g_free(tmp);
});
if (saveoffset)
*saveoffset = offset;
return t;
}
/* extra rfc checks */
#define CHECKS
#ifdef CHECKS
static void
check_header(struct _header_raw *h)
{
unsigned char *p;
p = h->value;
while (*p) {
if (!isascii(*p)) {
g_warning("Appending header violates rfc: %s: %s", h->name, h->value);
return;
}
p++;
}
}
#endif
void
header_raw_append_parse(struct _header_raw **list, const char *header, int offset)
{
register const char *in;
int fieldlen;
char *name;
in = header;
while (is_fieldname(*in))
in++;
fieldlen = in-header;
while (is_lwsp(*in))
in++;
if (fieldlen == 0 || *in != ':') {
printf("Invalid header line: '%s'\n", header);
return;
}
in++;
name = alloca(fieldlen+1);
memcpy(name, header, fieldlen);
name[fieldlen] = 0;
header_raw_append(list, name, in, offset);
}
void
header_raw_append(struct _header_raw **list, const char *name, const char *value, int offset)
{
struct _header_raw *l, *n;
d(printf("Header: %s: %s\n", name, value));
n = g_malloc(sizeof(*n));
n->next = NULL;
n->name = g_strdup(name);
n->value = g_strdup(value);
n->offset = offset;
#ifdef CHECKS
check_header(n);
#endif
l = (struct _header_raw *)list;
while (l->next) {
l = l->next;
}
l->next = n;
/* debug */
#if 0
if (!strcasecmp(name, "To")) {
printf("- Decoding To\n");
header_to_decode(value);
} else if (!strcasecmp(name, "Content-type")) {
printf("- Decoding content-type\n");
header_content_type_dump(header_content_type_decode(value));
} else if (!strcasecmp(name, "MIME-Version")) {
printf("- Decoding mime version\n");
header_mime_decode(value);
}
#endif
}
static struct _header_raw *
header_raw_find_node(struct _header_raw **list, const char *name)
{
struct _header_raw *l;
l = *list;
while (l) {
if (!strcasecmp(l->name, name))
break;
l = l->next;
}
return l;
}
const char *
header_raw_find(struct _header_raw **list, const char *name, int *offset)
{
struct _header_raw *l;
l = header_raw_find_node(list, name);
if (l) {
if (offset)
*offset = l->offset;
return l->value;
} else
return NULL;
}
const char *
header_raw_find_next(struct _header_raw **list, const char *name, int *offset, const char *last)
{
struct _header_raw *l;
if (last == NULL || name == NULL)
return NULL;
l = *list;
while (l && l->value != last)
l = l->next;
return header_raw_find(&l, name, offset);
}
static void
header_raw_free(struct _header_raw *l)
{
g_free(l->name);
g_free(l->value);
g_free(l);
}
void
header_raw_remove(struct _header_raw **list, const char *name)
{
struct _header_raw *l, *p;
/* the next pointer is at the head of the structure, so this is safe */
p = (struct _header_raw *)list;
l = *list;
while (l) {
if (!strcasecmp(l->name, name)) {
p->next = l->next;
header_raw_free(l);
l = p->next;
} else {
p = l;
l = l->next;
}
}
}
void
header_raw_replace(struct _header_raw **list, const char *name, const char *value, int offset)
{
header_raw_remove(list, name);
header_raw_append(list, name, value, offset);
}
void
header_raw_clear(struct _header_raw **list)
{
struct _header_raw *l, *n;
l = *list;
while (l) {
n = l->next;
header_raw_free(l);
l = n;
}
*list = NULL;
}
/* ok, here's the address stuff, what a mess ... */
struct _header_address *header_address_new(void)
{
struct _header_address *h;
h = g_malloc0(sizeof(*h));
h->type = HEADER_ADDRESS_NONE;
h->refcount = 1;
return h;
}
struct _header_address *header_address_new_name(const char *name, const char *addr)
{
struct _header_address *h;
h = header_address_new();
h->type = HEADER_ADDRESS_NAME;
h->name = g_strdup(name);
h->v.addr = g_strdup(addr);
return h;
}
struct _header_address *header_address_new_group(const char *name)
{
struct _header_address *h;
h = header_address_new();
h->type = HEADER_ADDRESS_GROUP;
h->name = g_strdup(name);
return h;
}
void header_address_ref(struct _header_address *h)
{
if (h)
h->refcount++;
}
void header_address_unref(struct _header_address *h)
{
if (h) {
if (h->refcount <= 1) {
if (h->type == HEADER_ADDRESS_GROUP) {
header_address_list_clear(&h->v.members);
} else if (h->type == HEADER_ADDRESS_NAME) {
g_free(h->v.addr);
}
g_free(h->name);
g_free(h);
} else {
h->refcount--;
}
}
}
void header_address_set_name(struct _header_address *h, const char *name)
{
if (h) {
g_free(h->name);
h->name = g_strdup(name);
}
}
void header_address_set_addr(struct _header_address *h, const char *addr)
{
if (h) {
if (h->type == HEADER_ADDRESS_NAME
|| h->type == HEADER_ADDRESS_NONE) {
h->type = HEADER_ADDRESS_NAME;
g_free(h->v.addr);
h->v.addr = g_strdup(addr);
} else {
g_warning("Trying to set the address on a group");
}
}
}
void header_address_set_members(struct _header_address *h, struct _header_address *group)
{
if (h) {
if (h->type == HEADER_ADDRESS_GROUP
|| h->type == HEADER_ADDRESS_NONE) {
h->type = HEADER_ADDRESS_GROUP;
header_address_list_clear(&h->v.members);
/* should this ref them? */
h->v.members = group;
} else {
g_warning("Trying to set the members on a name, not group");
}
}
}
void header_address_add_member(struct _header_address *h, struct _header_address *member)
{
if (h) {
if (h->type == HEADER_ADDRESS_GROUP
|| h->type == HEADER_ADDRESS_NONE) {
h->type = HEADER_ADDRESS_GROUP;
header_address_list_append(&h->v.members, member);
}
}
}
void header_address_list_append_list(struct _header_address **l, struct _header_address **h)
{
if (l) {
struct _header_address *n = (struct _header_address *)l;
while (n->next)
n = n->next;
n->next = *h;
}
}
void header_address_list_append(struct _header_address **l, struct _header_address *h)
{
if (h) {
header_address_list_append_list(l, &h);
h->next = NULL;
}
}
void header_address_list_clear(struct _header_address **l)
{
struct _header_address *a, *n;
a = (struct _header_address *)l;
while (a && a->next) {
n = a->next;
a = n->next;
header_address_unref(n);
}
}
static void
header_address_list_format_append(GString *out, struct _header_address *a)
{
char *text;
while (a) {
switch (a->type) {
case HEADER_ADDRESS_NAME:
#warning needs to rfc2047 encode address phrase
/* FIXME: 2047 encoding?? */
if (a->name)
g_string_sprintfa(out, "\"%s\" <%s>", a->name, a->v.addr);
else
g_string_sprintfa(out, "<%s>", a->v.addr);
break;
case HEADER_ADDRESS_GROUP:
text = header_encode_string(a->name);
g_string_sprintfa(out, "%s:\n ", text);
header_address_list_format_append(out, a->v.members);
g_string_sprintfa(out, ";");
break;
default:
g_warning("Invalid address type");
break;
}
a = a->next;
}
}
/* FIXME: need a 'display friendly' version, as well as a 'rfc friendly' version? */
char *
header_address_list_format(struct _header_address *a)
{
GString *out;
char *ret;
if (a == NULL)
return NULL;
out = g_string_new("");
header_address_list_format_append(out, a);
ret = out->str;
g_string_free(out, FALSE);
return ret;
}
#ifdef BUILD_TABLE
/* for debugging tests */
/* should also have some regression tests somewhere */
void run_test(void)
{
char *to = "gnome hacker dudes: license-discuss@opensource.org,
\"Richard M. Stallman\" <rms@gnu.org>,
Barry Chester <barry_che@antdiv.gov.au>,
Michael Zucchi <zucchi.michael(this (is a nested) comment)@zedzone.mmc.com.au>,
Miguel de Icaza <miguel@gnome.org>;,
zucchi@zedzone.mmc.com.au, \"Foo bar\" <zed@zedzone>,
<frob@frobzone>";
header_to_decode(to);
header_mime_decode("1.0");
header_mime_decode("1.3 (produced by metasend V1.0)");
header_mime_decode("(produced by metasend V1.0) 5.2");
header_mime_decode("7(produced by metasend 1.0) . (produced by helix/send/1.0) 9 . 5");
header_mime_decode("3.");
header_mime_decode(".");
header_mime_decode(".5");
header_mime_decode("c.d");
header_mime_decode("");
header_msgid_decode(" <\"L3x2i1.0.Nm5.Xd-Wu\"@lists.redhat.com>");
header_msgid_decode("<200001180446.PAA02065@beaker.htb.com.au>");
}
#endif /* BUILD_TABLE */
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