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I will have to provide URI handling functions, so ...
Daniel

/**
 * uri.c: set of generic URI related routines 
 *
 *  Reference: RFC 2396
 */

#ifdef WIN32
#define INCLUDE_WINSOCK
#include "win32config.h"
#else
#include "config.h"
#endif

#include <stdio.h>
#include <string.h>

/**
 * alpha    = lowalpha | upalpha
 */
#define IS_ALPHA(x) (IS_LOWALPHA(x) || IS_UPALPHA(x))


/**
 * lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" |
 *            "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" |
 *            "u" | "v" | "w" | "x" | "y" | "z"
 */

#define IS_LOWAPHA(x) ((x >= 'a') && (x <= 'z'))

/**
 * upalpha = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" |
 *           "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" |
 *           "U" | "V" | "W" | "X" | "Y" | "Z"
 */
#define IS_UPALPHA(x) ((x >= 'A') && (x <= 'Z'))

/**
 * digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
 */

#define IS_DIGIT(x) ((x >= '0') && (x <= '9'))

/**
 * alphanum = alpha | digit
 */

#define IS_ALPHANUM(x) (IS_ALPHA(x) || IS_DIGIT(x))

/**
 * hex = digit | "A" | "B" | "C" | "D" | "E" | "F" |
 *               "a" | "b" | "c" | "d" | "e" | "f"
 */

#define IS_HEX(x) ((IS_DIGIT(x) || ((x >= 'a') && (x <= 'f')) || \
	    ((x >= 'A') && (x <= 'F')))

/**
 * mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
 */

#define IS_MARK(x) ((x == '-') || (x == '_') || (x == '.') || (x == '!') || \
      (x == '~') || (x == '*') || (x == ''') || (x == '(') || (x == ')'))


/**
 * reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" | "$" | ","
 */

#define IS_RESERVED(x) ((x == ';') || (x == '/') || (x == '?') || \
          (x == ':') || (x == '@') || (x == '&') || (x == '=') || \
	  (x == '+') || (x == '$') || (x == ','))

/**
 * unreserved = alphanum | mark
 */

#define IS_UNRESERVED(x) (IS_ALPHANUM(x) || IS_MARK(x))


/**
 *
      URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ]
      absoluteURI   = scheme ":" ( hier_part | opaque_part )
      relativeURI   = ( net_path | abs_path | rel_path ) [ "?" query ]

      hier_part     = ( net_path | abs_path ) [ "?" query ]
      opaque_part   = uric_no_slash *uric

      net_path      = "//" authority [ abs_path ]
      abs_path      = "/"  path_segments
      rel_path      = rel_segment [ abs_path ]

      rel_segment   = 1*( unreserved | escaped |
                          ";" | "@" | "&" | "=" | "+" | "$" | "," )

      scheme        = alpha *( alpha | digit | "+" | "-" | "." )

      authority     = server | reg_name

      reg_name      = 1*( unreserved | escaped | "$" | "," |
                          ";" | ":" | "@" | "&" | "=" | "+" )

      server        = [ [ userinfo "@" ] hostport ]
      userinfo      = *( unreserved | escaped |
                         ";" | ":" | "&" | "=" | "+" | "$" | "," )

      hostport      = host [ ":" port ]
      host          = hostname | IPv4address
      hostname      = *( domainlabel "." ) toplabel [ "." ]
      domainlabel   = alphanum | alphanum *( alphanum | "-" ) alphanum
      toplabel      = alpha | alpha *( alphanum | "-" ) alphanum
      IPv4address   = 1*digit "." 1*digit "." 1*digit "." 1*digit
      port          = *digit

      path          = [ abs_path | opaque_part ]
      path_segments = segment *( "/" segment )
      segment       = *pchar *( ";" param )
      param         = *pchar

      query         = *uric

      fragment      = *uric

      Macroifiables
      =============

      uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
                      "&" | "=" | "+" | "$" | ","

      pchar         = unreserved | escaped |
                      ":" | "@" | "&" | "=" | "+" | "$" | ","
      escaped       = "%" hex hex

     */