132 lines
2.2 KiB
C
132 lines
2.2 KiB
C
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/*
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** Copyright 2000 Double Precision, Inc. See COPYING for
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** distribution information.
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*/
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/*
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** $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#if HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#include <ctype.h>
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#include "rfc2045.h"
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extern void rfc2045_enomem();
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/*
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** ---------------------------------------------------------------------
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** Attempt to parse Content-Base: and Content-Location:, and return the
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** "base" of all the relative URLs in the section.
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** ---------------------------------------------------------------------
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*/
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static void get_method_path(const char *p,
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const char **method,
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unsigned *methodl,
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const char **path)
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{
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unsigned i;
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for (i=0; p && p[i]; i++)
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{
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if (p[i] == ':')
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{
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*method=p;
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*methodl= ++i;
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*path=p+i;
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return;
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}
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if (!isalpha( (int)(unsigned char)p[i]))
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break;
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}
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*method=0;
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*methodl=0;
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*path=p;
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}
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char *rfc2045_append_url(const char *base, const char *loc)
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{
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const char *base_method;
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unsigned base_method_l;
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const char *base_path;
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const char *loc_method;
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unsigned loc_method_l;
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const char *loc_path;
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char *buf, *q;
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get_method_path(base, &base_method, &base_method_l, &base_path);
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get_method_path(loc, &loc_method, &loc_method_l, &loc_path);
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if (loc_method_l)
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{
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buf=malloc(strlen(loc)+1);
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if (!buf)
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rfc2045_enomem();
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else
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strcpy(buf, loc);
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return (buf);
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}
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loc_method=base_method;
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loc_method_l=base_method_l;
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if (!base_path) base_path="";
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if (!loc_path) loc_path="";
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buf=malloc(loc_method_l + strlen(base_path)+strlen(loc_path) + 3);
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if (!buf)
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{
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rfc2045_enomem();
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return (0);
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}
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if (loc_method_l)
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memcpy(buf, loc_method, loc_method_l);
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buf[loc_method_l]=0;
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q=buf + loc_method_l;
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strcat(strcpy(q, base_path), "/");
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if ( loc_path[0] == '/')
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{
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char *r;
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if (loc_path[1] == '/')
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/* Location is absolute */
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{
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*q=0;
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}
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/* Relative to top of base */
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else if ( q[0] == '/' && q[1] == '/' &&
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(r=strchr(q+2, '/')) != 0)
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{
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*r=0;
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}
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else
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*q=0; /* No sys in base, just start with / */
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}
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strcat(q, loc_path);
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return (buf);
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}
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char *rfc2045_content_base(struct rfc2045 *p)
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{
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return (rfc2045_append_url(p->content_base, p->content_location));
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}
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