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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2025 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#include <config.h>
#include <mailutils/cctype.h>
#include <mailutils/util.h>
enum
{
MATCH = 0,
NO_MATCH = 1
};
/* Return MATCH (0) if content-type string TYPESTR matches one of
patterns from PATLIST, a list of patterns delimited with DELIM.
Whitespace is allowed at either side of patterns in PATLIST.
Empty patterns are ignored.
A "pattern" is a type/subtype specification. Matching is case-insensitive.
If the subtype is '*', it matches any subtype from TYPESTR.
*/
int
mu_mailcap_string_match (char const *patlist, int delim, char const *typestr)
{
char const *type;
if (!patlist)
return NO_MATCH;
while (*patlist)
{
type = typestr;
/* Skip whitespace and delimiters */
while (*patlist && (*patlist == delim || mu_isspace (*patlist)))
patlist++;
/* Match type */
do
{
if (!*patlist || !*type
|| mu_tolower (*patlist++) != mu_tolower (*type++))
goto retry;
if (*patlist == delim)
goto retry;
}
while (*patlist != '/');
if (*type != '/')
goto retry;
patlist++;
type++;
if (*patlist == '*')
return MATCH;
/* Match subtype */
while (*patlist && *patlist != delim && *type
&& mu_tolower (*patlist) == mu_tolower (*type))
{
patlist++;
type++;
}
/* Skip optional whitespace */
while (*patlist && mu_isspace (*patlist))
patlist++;
if (*patlist == 0 || *patlist == delim)
{
if (*type == 0)
return MATCH;
}
retry:
/* Skip to the next pattern */
do
{
if (*patlist == 0)
return NO_MATCH;
patlist++;
}
while (*patlist != delim);
}
return NO_MATCH;
}
/* Return 0 if parsed content-type CT matches PATTERN. */
int
mu_mailcap_content_type_match (char const *patlist, int delim,
mu_content_type_t ct)
{
char const *type;
if (!patlist)
return NO_MATCH;
while (*patlist)
{
type = ct->type;
/* Skip whitespace and delimiters */
while (*patlist && (*patlist == delim || mu_isspace (*patlist)))
patlist++;
/* Match type */
do
{
if (!*patlist || !*type
|| mu_tolower (*patlist++) != mu_tolower (*type++))
goto retry;
if (*patlist == delim)
goto retry;
}
while (*patlist != '/');
if (*type != 0)
goto retry;
patlist++;
if (*patlist == '*')
return MATCH;
/* Match subtype */
type = ct->subtype;
while (*patlist && *patlist != delim && *type
&& mu_tolower (*patlist) == mu_tolower (*type))
{
patlist++;
type++;
}
/* Skip optional whitespace */
while (*patlist && mu_isspace (*patlist))
patlist++;
if (*patlist == 0 || *patlist == delim)
{
if (*type == 0)
return MATCH;
}
retry:
/* Skip to next pattern */
do
{
if (*patlist == 0)
return NO_MATCH;
patlist++;
}
while (*patlist != delim);
}
return NO_MATCH;
}
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