/* Escape all non-ascii or control characters similar to
* svn_xml_fuzzy_escape() and svn_utf_cstring_from_utf8_fuzzy().
* All of the encoding formats somewhat overlap with ascii (BMPString
* and UniversalString are actually always wider so you'll end up
* with a bunch of escaped nul bytes, but ideally we don't get here
* for those). The result is always a nul-terminated C string. */
static const char *
fuzzy_escape(const svn_string_t *src, apr_pool_t *result_pool)
{
const char *end = src->data + src->len;
const char *p = src->data, *q;
svn_stringbuf_t *outstr;
char escaped_char[6]; /* ? \ u u u \0 */
for (q = p; q < end; q++)
{
if (!svn_ctype_isascii(*q) || svn_ctype_iscntrl(*q))
break;
}
if (q == end)
return src->data;
outstr = svn_stringbuf_create_empty(result_pool);
while (1)
{
q = p;
/* Traverse till either unsafe character or eos. */
while (q < end && svn_ctype_isascii(*q) && !svn_ctype_iscntrl(*q))
q++;
/* copy chunk before marker */
svn_stringbuf_appendbytes(outstr, p, q - p);
if (q == end)
break;
apr_snprintf(escaped_char, sizeof(escaped_char), "?\\%03u",
(unsigned char) *q);
svn_stringbuf_appendcstr(outstr, escaped_char);
p = q + 1;
}
return outstr->data;
}
svn_error_t *
svn_fs_lock(svn_lock_t **lock, svn_fs_t *fs, const char *path,
const char *token, const char *comment,
svn_boolean_t is_dav_comment, apr_time_t expiration_date,
svn_revnum_t current_rev, svn_boolean_t steal_lock,
apr_pool_t *pool)
{
/* Enforce that the comment be xml-escapable. */
if (comment)
{
if (! svn_xml_is_xml_safe(comment, strlen(comment)))
return svn_error_create
(SVN_ERR_XML_UNESCAPABLE_DATA, NULL,
_("Lock comment contains illegal characters"));
}
/* Enforce that the token be an XML-safe URI. */
if (token)
{
const char *c;
if (strncmp(token, "opaquelocktoken:", 16))
return svn_error_createf(SVN_ERR_FS_BAD_LOCK_TOKEN, NULL,
_("Lock token URI '%s' has bad scheme; "
"expected '%s'"),
token, "opaquelocktoken");
for (c = token; *c; c++)
if (! svn_ctype_isascii(*c))
return svn_error_createf(SVN_ERR_FS_BAD_LOCK_TOKEN, NULL,
_("Lock token '%s' is not ASCII "
"at byte %u"),
token, (unsigned)(c - token));
/* strlen(token) == c - token. */
if (! svn_xml_is_xml_safe(token, c - token))
return svn_error_createf(SVN_ERR_FS_BAD_LOCK_TOKEN, NULL,
_("Lock token URI '%s' is not XML-safe"),
token);
}
if (expiration_date < 0)
return svn_error_create
(SVN_ERR_INCORRECT_PARAMS, NULL,
_("Negative expiration date passed to svn_fs_lock"));
return svn_error_trace(fs->vtable->lock(lock, fs, path, token, comment,
is_dav_comment, expiration_date,
current_rev, steal_lock, pool));
}
