+++ /dev/null
-/*
- * Copyright notice from original mutt:
- * Copyright (C) 1999-2000 Thomas Roessler <roessler@does-not-exist.org>
- *
- * This file is part of mutt-ng, see http://www.muttng.org/.
- * It's licensed under the GNU General Public License,
- * please see the file GPL in the top level source directory.
- */
-
-/*
- * Yet another MIME encoding for header data. This time, it's
- * parameters, specified in RFC 2231, and modeled after the
- * encoding used in URLs.
- *
- * Additionally, continuations and encoding are mixed in an, errrm,
- * interesting manner.
- *
- */
-
-#if HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <lib-lib/mem.h>
-#include <lib-lib/str.h>
-#include <lib-lib/ascii.h>
-
-#include "mutt.h"
-#include "mime.h"
-#include "charset.h"
-#include "rfc2047.h"
-#include "rfc2231.h"
-
-#include <ctype.h>
-#include <string.h>
-#include <stdlib.h>
-
-struct rfc2231_parameter {
- char *attribute;
- char *value;
- int index;
- int encoded;
- struct rfc2231_parameter
- *next;
-};
-
-static char *rfc2231_get_charset (char *, char *, size_t);
-static struct rfc2231_parameter *rfc2231_new_parameter (void);
-static void rfc2231_decode_one (char *, char *);
-static void rfc2231_free_parameter (struct rfc2231_parameter **);
-static void rfc2231_join_continuations (PARAMETER **,
- struct rfc2231_parameter *);
-static void rfc2231_list_insert (struct rfc2231_parameter **,
- struct rfc2231_parameter *);
-
-static void purge_empty_parameters (PARAMETER ** headp)
-{
- PARAMETER *p, *q, **last;
-
- for (last = headp, p = *headp; p; p = q) {
- q = p->next;
- if (!p->attribute || !p->value) {
- *last = q;
- p->next = NULL;
- mutt_free_parameter (&p);
- }
- else
- last = &p->next;
- }
-}
-
-
-void rfc2231_decode_parameters (PARAMETER ** headp)
-{
- PARAMETER *head = NULL;
- PARAMETER **last;
- PARAMETER *p, *q;
-
- struct rfc2231_parameter *conthead = NULL;
- struct rfc2231_parameter *conttmp;
-
- char *s, *t;
- char charset[STRING];
-
- int encoded;
- int index;
- short dirty = 0; /* set to 1 when we may have created
- * empty parameters.
- */
-
- if (!headp)
- return;
-
- purge_empty_parameters (headp);
-
- for (last = &head, p = *headp; p; p = q) {
- q = p->next;
-
- if (!(s = strchr (p->attribute, '*'))) {
-
- /*
- * Using RFC 2047 encoding in MIME parameters is explicitly
- * forbidden by that document. Nevertheless, it's being
- * generated by some software, including certain Lotus Notes to
- * Internet Gateways. So we actually decode it.
- */
-
- if (option (OPTRFC2047PARAMS) && p->value && strstr (p->value, "=?"))
- rfc2047_decode (&p->value);
- else if (!option (OPTSTRICTMIME)) {
- if (ascii_strcasecmp (AssumedCharset, "us-ascii"))
- mutt_convert_nonmime_string (&p->value);
- }
-
- *last = p;
- last = &p->next;
- p->next = NULL;
- }
- else if (*(s + 1) == '\0') {
- *s = '\0';
-
- s = rfc2231_get_charset (p->value, charset, sizeof (charset));
- rfc2231_decode_one (p->value, s);
- mutt_convert_string (&p->value, charset, Charset, M_ICONV_HOOK_FROM);
-
- *last = p;
- last = &p->next;
- p->next = NULL;
-
- dirty = 1;
- }
- else {
- *s = '\0';
- s++; /* let s point to the first character of index. */
- for (t = s; *t && isdigit ((unsigned char) *t); t++);
- encoded = (*t == '*');
- *t = '\0';
-
- index = atoi (s);
-
- conttmp = rfc2231_new_parameter ();
- conttmp->attribute = p->attribute;
- conttmp->value = p->value;
- conttmp->encoded = encoded;
- conttmp->index = index;
-
- p->attribute = NULL;
- p->value = NULL;
- p_delete(&p);
-
- rfc2231_list_insert (&conthead, conttmp);
- }
- }
-
- if (conthead) {
- rfc2231_join_continuations (last, conthead);
- dirty = 1;
- }
-
- *headp = head;
-
- if (dirty)
- purge_empty_parameters (headp);
-}
-
-static struct rfc2231_parameter *rfc2231_new_parameter (void)
-{
- return p_new(struct rfc2231_parameter, 1);
-}
-
-static void rfc2231_free_parameter (struct rfc2231_parameter **p)
-{
- if (*p) {
- p_delete(&(*p)->attribute);
- p_delete(&(*p)->value);
- p_delete(p);
- }
-}
-
-static char *rfc2231_get_charset (char *value, char *charset, size_t chslen)
-{
- char *t, *u;
-
- if (!(t = strchr (value, '\''))) {
- charset[0] = '\0';
- return value;
- }
-
- *t = '\0';
- m_strcpy(charset, chslen, value);
-
- if ((u = strchr (t + 1, '\'')))
- return u + 1;
- else
- return t + 1;
-}
-
-static void rfc2231_decode_one (char *dest, char *src)
-{
- char *d;
-
- for (d = dest; *src; src++) {
- if (*src == '%' &&
- isxdigit ((unsigned char) *(src + 1)) &&
- isxdigit ((unsigned char) *(src + 2))) {
- *d++ = (hexval (*(src + 1)) << 4) | (hexval (*(src + 2)));
- src += 2;
- }
- else
- *d++ = *src;
- }
-
- *d = '\0';
-}
-
-/* insert parameter into an ordered list.
- *
- * Primary sorting key: attribute
- * Secondary sorting key: index
- */
-
-static void rfc2231_list_insert (struct rfc2231_parameter **list,
- struct rfc2231_parameter *par)
-{
- struct rfc2231_parameter **last = list;
- struct rfc2231_parameter *p = *list, *q;
- int c;
-
- while (p) {
- last = &p->next;
- q = p;
- p = p->next;
-
- c = m_strcmp(par->value, q->value);
- if ((c > 0) || (c == 0 && par->index >= q->index))
- break;
- }
-
- par->next = p;
- *last = par;
-}
-
-/* process continuation parameters */
-
-static void rfc2231_join_continuations (PARAMETER ** head,
- struct rfc2231_parameter *par)
-{
- struct rfc2231_parameter *q;
-
- char attribute[STRING];
- char charset[STRING];
- char *value = NULL;
- char *valp;
- int encoded;
-
- size_t l, vl;
-
- while (par) {
- value = NULL;
- l = 0;
-
- m_strcpy(attribute, sizeof(attribute), par->attribute);
-
- if ((encoded = par->encoded))
- valp = rfc2231_get_charset (par->value, charset, sizeof (charset));
- else
- valp = par->value;
-
- do {
- if (encoded && par->encoded)
- rfc2231_decode_one (par->value, valp);
-
- vl = m_strlen(par->value);
-
- p_realloc(&value, l + vl + 1);
- strcpy (value + l, par->value); /* __STRCPY_CHECKED__ */
- l += vl;
-
- q = par->next;
- rfc2231_free_parameter (&par);
- if ((par = q))
- valp = par->value;
- } while (par && !m_strcmp(par->attribute, attribute));
-
- if (value) {
- if (encoded)
- mutt_convert_string (&value, charset, Charset, M_ICONV_HOOK_FROM);
- *head = mutt_new_parameter ();
- (*head)->attribute = m_strdup(attribute);
- (*head)->value = value;
- head = &(*head)->next;
- }
- }
-}
-
-int rfc2231_encode_string (char **pd)
-{
- int ext = 0, encode = 0;
- char *charset, *s, *t, *e, *d = 0;
- size_t slen, dlen = 0;
-
- /*
- * A shortcut to detect pure 7bit data.
- *
- * This should prevent the worst when character set handling
- * is flawed.
- */
-
- for (s = *pd; *s; s++)
- if (*s & 0x80)
- break;
-
- if (!*s)
- return 0;
-
- if (!Charset || !SendCharset ||
- !(charset = mutt_choose_charset (Charset, SendCharset,
- *pd, m_strlen(*pd), &d, &dlen))) {
- charset = m_strdup(Charset ? Charset : "unknown-8bit");
- d = *pd;
- dlen = m_strlen(d);
- }
-
- if (!mutt_is_us_ascii (charset))
- encode = 1;
-
- for (s = d, slen = dlen; slen; s++, slen--)
- if (*s < 0x20 || *s >= 0x7f)
- encode = 1, ++ext;
- else if (strchr (MimeSpecials, *s) || strchr ("*'%", *s))
- ++ext;
-
- if (encode) {
- e = p_new(char, dlen + 2 * ext + m_strlen(charset) + 3);
- sprintf (e, "%s''", charset); /* __SPRINTF_CHECKED__ */
- t = e + m_strlen(e);
- for (s = d, slen = dlen; slen; s++, slen--)
- if (*s < 0x20 || *s >= 0x7f ||
- strchr (MimeSpecials, *s) || strchr ("*'%", *s)) {
- sprintf (t, "%%%02X", (unsigned char) *s);
- t += 3;
- }
- else
- *t++ = *s;
- *t = '\0';
-
- if (d != *pd)
- p_delete(&d);
- p_delete(pd);
- *pd = e;
- }
- else if (d != *pd) {
- p_delete(pd);
- *pd = d;
- }
-
- p_delete(&charset);
-
- return encode;
-}
projects / apps / madmutt.git / blobdiff