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42 * RFC 1738 defines that these characters should be escaped, as well
43 * any non-US-ASCII character or anything between 0x00 - 0x1F.
45 static char rfc1738_unsafe_chars
[] = {
50 #if 0 /* done in code */
63 (char) 0x20 /* space */
66 static char rfc1738_reserved_chars
[] = {
77 * rfc1738_escape - Returns a static buffer contains the RFC 1738
78 * compliant, escaped version of the given url.
81 rfc1738_do_escape (const char *url
, int encode_reserved
)
84 static size_t bufsize
= 0;
87 unsigned int i
, do_escape
;
89 if (buf
== NULL
|| strlen (url
) * 3 > bufsize
)
92 bufsize
= strlen (url
) * 3 + 1;
93 buf
= new char [bufsize
];
95 for (p
= url
, q
= buf
; *p
!= '\0'; p
++, q
++)
99 /* RFC 1738 defines these chars as unsafe */
100 for (i
= 0; i
< sizeof (rfc1738_unsafe_chars
); i
++)
102 if (*p
== rfc1738_unsafe_chars
[i
])
108 /* Handle % separately */
109 if (encode_reserved
>= 0 && *p
== '%')
111 /* RFC 1738 defines these chars as reserved */
112 for (i
= 0; i
< sizeof (rfc1738_reserved_chars
) && encode_reserved
> 0;
115 if (*p
== rfc1738_reserved_chars
[i
])
121 /* RFC 1738 says any control chars (0x00-0x1F) are encoded */
122 if ((unsigned char) *p
<= (unsigned char) 0x1F)
126 /* RFC 1738 says 0x7f is encoded */
127 if (*p
== (char) 0x7F)
131 /* RFC 1738 says any non-US-ASCII are encoded */
132 if (((unsigned char) *p
>= (unsigned char) 0x80) &&
133 ((unsigned char) *p
<= (unsigned char) 0xFF))
137 /* Do the triplet encoding, or just copy the char */
138 /* note: we do not need snprintf here as q is appropriately
143 (void) sprintf (q
, "%%%02x", (unsigned char) *p
);
144 q
+= sizeof (char) * 2;
156 * rfc1738_escape - Returns a static buffer that contains the RFC
157 * 1738 compliant, escaped version of the given url.
160 rfc1738_escape (const char *url
)
162 return rfc1738_do_escape (url
, 0);
166 * rfc1738_escape_unescaped - Returns a static buffer that contains
167 * the RFC 1738 compliant, escaped version of the given url.
170 rfc1738_escape_unescaped (const char *url
)
172 return rfc1738_do_escape (url
, -1);
176 * rfc1738_escape_part - Returns a static buffer that contains the
177 * RFC 1738 compliant, escaped version of the given url segment.
180 rfc1738_escape_part (const char *url
)
182 return rfc1738_do_escape (url
, 1);
185 rfc1738_escape_part (String
const &url
)
187 char const *t
= rfc1738_do_escape (url
.cstr_oneuse(), 1);
192 * rfc1738_unescape() - Converts escaped characters (%xy numbers) in
193 * given the string. %% is a %. %ab is the 8-bit hexadecimal number "ab"
196 rfc1738_unescape (char *s
)
199 int i
, j
; /* i is write, j is read */
201 for (i
= j
= 0; s
[j
]; i
++, j
++)
211 if (s
[j
+ 1] && s
[j
+ 2])
213 hexnum
[0] = s
[j
+ 1];
214 hexnum
[1] = s
[j
+ 2];
216 if (1 == sscanf (hexnum
, "%x", &x
))
218 s
[i
] = (char) (0x0ff & x
);
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