diff options
Diffstat (limited to 'external/libxml2_android/jni/libxml2/uri.c')
| -rw-r--r-- | external/libxml2_android/jni/libxml2/uri.c | 2568 |
1 files changed, 0 insertions, 2568 deletions
diff --git a/external/libxml2_android/jni/libxml2/uri.c b/external/libxml2_android/jni/libxml2/uri.c deleted file mode 100644 index 530ce212..00000000 --- a/external/libxml2_android/jni/libxml2/uri.c +++ /dev/null @@ -1,2568 +0,0 @@ -/** - * uri.c: set of generic URI related routines - * - * Reference: RFCs 3986, 2732 and 2373 - * - * See Copyright for the status of this software. - * - * daniel@veillard.com - */ - -#define IN_LIBXML -#include "libxml.h" - -#include <string.h> - -#include <libxml/xmlmemory.h> -#include <libxml/uri.h> -#include <libxml/globals.h> -#include <libxml/xmlerror.h> - -/** - * MAX_URI_LENGTH: - * - * The definition of the URI regexp in the above RFC has no size limit - * In practice they are usually relativey short except for the - * data URI scheme as defined in RFC 2397. Even for data URI the usual - * maximum size before hitting random practical limits is around 64 KB - * and 4KB is usually a maximum admitted limit for proper operations. - * The value below is more a security limit than anything else and - * really should never be hit by 'normal' operations - * Set to 1 MByte in 2012, this is only enforced on output - */ -#define MAX_URI_LENGTH 1024 * 1024 - -static void -xmlURIErrMemory(const char *extra) -{ - if (extra) - __xmlRaiseError(NULL, NULL, NULL, - NULL, NULL, XML_FROM_URI, - XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, - extra, NULL, NULL, 0, 0, - "Memory allocation failed : %s\n", extra); - else - __xmlRaiseError(NULL, NULL, NULL, - NULL, NULL, XML_FROM_URI, - XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, - NULL, NULL, NULL, 0, 0, - "Memory allocation failed\n"); -} - -static void xmlCleanURI(xmlURIPtr uri); - -/* - * Old rule from 2396 used in legacy handling code - * 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_LOWALPHA(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')) - -#ifdef IS_DIGIT -#undef IS_DIGIT -#endif -/* - * 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)) - -/* - * mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")" - */ - -#define IS_MARK(x) (((x) == '-') || ((x) == '_') || ((x) == '.') || \ - ((x) == '!') || ((x) == '~') || ((x) == '*') || ((x) == '\'') || \ - ((x) == '(') || ((x) == ')')) - -/* - * unwise = "{" | "}" | "|" | "\" | "^" | "`" - */ - -#define IS_UNWISE(p) \ - (((*(p) == '{')) || ((*(p) == '}')) || ((*(p) == '|')) || \ - ((*(p) == '\\')) || ((*(p) == '^')) || ((*(p) == '[')) || \ - ((*(p) == ']')) || ((*(p) == '`'))) -/* - * reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" | "$" | "," | - * "[" | "]" - */ - -#define IS_RESERVED(x) (((x) == ';') || ((x) == '/') || ((x) == '?') || \ - ((x) == ':') || ((x) == '@') || ((x) == '&') || ((x) == '=') || \ - ((x) == '+') || ((x) == '$') || ((x) == ',') || ((x) == '[') || \ - ((x) == ']')) - -/* - * unreserved = alphanum | mark - */ - -#define IS_UNRESERVED(x) (IS_ALPHANUM(x) || IS_MARK(x)) - -/* - * Skip to next pointer char, handle escaped sequences - */ - -#define NEXT(p) ((*p == '%')? p += 3 : p++) - -/* - * Productions from the spec. - * - * authority = server | reg_name - * reg_name = 1*( unreserved | escaped | "$" | "," | - * ";" | ":" | "@" | "&" | "=" | "+" ) - * - * path = [ abs_path | opaque_part ] - */ - -#define STRNDUP(s, n) (char *) xmlStrndup((const xmlChar *)(s), (n)) - -/************************************************************************ - * * - * RFC 3986 parser * - * * - ************************************************************************/ - -#define ISA_DIGIT(p) ((*(p) >= '0') && (*(p) <= '9')) -#define ISA_ALPHA(p) (((*(p) >= 'a') && (*(p) <= 'z')) || \ - ((*(p) >= 'A') && (*(p) <= 'Z'))) -#define ISA_HEXDIG(p) \ - (ISA_DIGIT(p) || ((*(p) >= 'a') && (*(p) <= 'f')) || \ - ((*(p) >= 'A') && (*(p) <= 'F'))) - -/* - * sub-delims = "!" / "$" / "&" / "'" / "(" / ")" - * / "*" / "+" / "," / ";" / "=" - */ -#define ISA_SUB_DELIM(p) \ - (((*(p) == '!')) || ((*(p) == '$')) || ((*(p) == '&')) || \ - ((*(p) == '(')) || ((*(p) == ')')) || ((*(p) == '*')) || \ - ((*(p) == '+')) || ((*(p) == ',')) || ((*(p) == ';')) || \ - ((*(p) == '=')) || ((*(p) == '\''))) - -/* - * gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@" - */ -#define ISA_GEN_DELIM(p) \ - (((*(p) == ':')) || ((*(p) == '/')) || ((*(p) == '?')) || \ - ((*(p) == '#')) || ((*(p) == '[')) || ((*(p) == ']')) || \ - ((*(p) == '@'))) - -/* - * reserved = gen-delims / sub-delims - */ -#define ISA_RESERVED(p) (ISA_GEN_DELIM(p) || (ISA_SUB_DELIM(p))) - -/* - * unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" - */ -#define ISA_UNRESERVED(p) \ - ((ISA_ALPHA(p)) || (ISA_DIGIT(p)) || ((*(p) == '-')) || \ - ((*(p) == '.')) || ((*(p) == '_')) || ((*(p) == '~'))) - -/* - * pct-encoded = "%" HEXDIG HEXDIG - */ -#define ISA_PCT_ENCODED(p) \ - ((*(p) == '%') && (ISA_HEXDIG(p + 1)) && (ISA_HEXDIG(p + 2))) - -/* - * pchar = unreserved / pct-encoded / sub-delims / ":" / "@" - */ -#define ISA_PCHAR(p) \ - (ISA_UNRESERVED(p) || ISA_PCT_ENCODED(p) || ISA_SUB_DELIM(p) || \ - ((*(p) == ':')) || ((*(p) == '@'))) - -/** - * xmlParse3986Scheme: - * @uri: pointer to an URI structure - * @str: pointer to the string to analyze - * - * Parse an URI scheme - * - * ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) - * - * Returns 0 or the error code - */ -static int -xmlParse3986Scheme(xmlURIPtr uri, const char **str) { - const char *cur; - - if (str == NULL) - return(-1); - - cur = *str; - if (!ISA_ALPHA(cur)) - return(2); - cur++; - while (ISA_ALPHA(cur) || ISA_DIGIT(cur) || - (*cur == '+') || (*cur == '-') || (*cur == '.')) cur++; - if (uri != NULL) { - if (uri->scheme != NULL) xmlFree(uri->scheme); - uri->scheme = STRNDUP(*str, cur - *str); - } - *str = cur; - return(0); -} - -/** - * xmlParse3986Fragment: - * @uri: pointer to an URI structure - * @str: pointer to the string to analyze - * - * Parse the query part of an URI - * - * fragment = *( pchar / "/" / "?" ) - * NOTE: the strict syntax as defined by 3986 does not allow '[' and ']' - * in the fragment identifier but this is used very broadly for - * xpointer scheme selection, so we are allowing it here to not break - * for example all the DocBook processing chains. - * - * Returns 0 or the error code - */ -static int -xmlParse3986Fragment(xmlURIPtr uri, const char **str) -{ - const char *cur; - - if (str == NULL) - return (-1); - - cur = *str; - - while ((ISA_PCHAR(cur)) || (*cur == '/') || (*cur == '?') || - (*cur == '[') || (*cur == ']') || - ((uri != NULL) && (uri->cleanup & 1) && (IS_UNWISE(cur)))) - NEXT(cur); - if (uri != NULL) { - if (uri->fragment != NULL) - xmlFree(uri->fragment); - if (uri->cleanup & 2) - uri->fragment = STRNDUP(*str, cur - *str); - else - uri->fragment = xmlURIUnescapeString(*str, cur - *str, NULL); - } - *str = cur; - return (0); -} - -/** - * xmlParse3986Query: - * @uri: pointer to an URI structure - * @str: pointer to the string to analyze - * - * Parse the query part of an URI - * - * query = *uric - * - * Returns 0 or the error code - */ -static int -xmlParse3986Query(xmlURIPtr uri, const char **str) -{ - const char *cur; - - if (str == NULL) - return (-1); - - cur = *str; - - while ((ISA_PCHAR(cur)) || (*cur == '/') || (*cur == '?') || - ((uri != NULL) && (uri->cleanup & 1) && (IS_UNWISE(cur)))) - NEXT(cur); - if (uri != NULL) { - if (uri->query != NULL) - xmlFree(uri->query); - if (uri->cleanup & 2) - uri->query = STRNDUP(*str, cur - *str); - else - uri->query = xmlURIUnescapeString(*str, cur - *str, NULL); - - /* Save the raw bytes of the query as well. - * See: http://mail.gnome.org/archives/xml/2007-April/thread.html#00114 - */ - if (uri->query_raw != NULL) - xmlFree (uri->query_raw); - uri->query_raw = STRNDUP (*str, cur - *str); - } - *str = cur; - return (0); -} - -/** - * xmlParse3986Port: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse a port part and fills in the appropriate fields - * of the @uri structure - * - * port = *DIGIT - * - * Returns 0 or the error code - */ -static int -xmlParse3986Port(xmlURIPtr uri, const char **str) -{ - const char *cur = *str; - unsigned port = 0; /* unsigned for defined overflow behavior */ - - if (ISA_DIGIT(cur)) { - while (ISA_DIGIT(cur)) { - port = port * 10 + (*cur - '0'); - - cur++; - } - if (uri != NULL) - uri->port = port & INT_MAX; /* port value modulo INT_MAX+1 */ - *str = cur; - return(0); - } - return(1); -} - -/** - * xmlParse3986Userinfo: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an user informations part and fills in the appropriate fields - * of the @uri structure - * - * userinfo = *( unreserved / pct-encoded / sub-delims / ":" ) - * - * Returns 0 or the error code - */ -static int -xmlParse3986Userinfo(xmlURIPtr uri, const char **str) -{ - const char *cur; - - cur = *str; - while (ISA_UNRESERVED(cur) || ISA_PCT_ENCODED(cur) || - ISA_SUB_DELIM(cur) || (*cur == ':')) - NEXT(cur); - if (*cur == '@') { - if (uri != NULL) { - if (uri->user != NULL) xmlFree(uri->user); - if (uri->cleanup & 2) - uri->user = STRNDUP(*str, cur - *str); - else - uri->user = xmlURIUnescapeString(*str, cur - *str, NULL); - } - *str = cur; - return(0); - } - return(1); -} - -/** - * xmlParse3986DecOctet: - * @str: the string to analyze - * - * dec-octet = DIGIT ; 0-9 - * / %x31-39 DIGIT ; 10-99 - * / "1" 2DIGIT ; 100-199 - * / "2" %x30-34 DIGIT ; 200-249 - * / "25" %x30-35 ; 250-255 - * - * Skip a dec-octet. - * - * Returns 0 if found and skipped, 1 otherwise - */ -static int -xmlParse3986DecOctet(const char **str) { - const char *cur = *str; - - if (!(ISA_DIGIT(cur))) - return(1); - if (!ISA_DIGIT(cur+1)) - cur++; - else if ((*cur != '0') && (ISA_DIGIT(cur + 1)) && (!ISA_DIGIT(cur+2))) - cur += 2; - else if ((*cur == '1') && (ISA_DIGIT(cur + 1)) && (ISA_DIGIT(cur + 2))) - cur += 3; - else if ((*cur == '2') && (*(cur + 1) >= '0') && - (*(cur + 1) <= '4') && (ISA_DIGIT(cur + 2))) - cur += 3; - else if ((*cur == '2') && (*(cur + 1) == '5') && - (*(cur + 2) >= '0') && (*(cur + 1) <= '5')) - cur += 3; - else - return(1); - *str = cur; - return(0); -} -/** - * xmlParse3986Host: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an host part and fills in the appropriate fields - * of the @uri structure - * - * host = IP-literal / IPv4address / reg-name - * IP-literal = "[" ( IPv6address / IPvFuture ) "]" - * IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet - * reg-name = *( unreserved / pct-encoded / sub-delims ) - * - * Returns 0 or the error code - */ -static int -xmlParse3986Host(xmlURIPtr uri, const char **str) -{ - const char *cur = *str; - const char *host; - - host = cur; - /* - * IPv6 and future adressing scheme are enclosed between brackets - */ - if (*cur == '[') { - cur++; - while ((*cur != ']') && (*cur != 0)) - cur++; - if (*cur != ']') - return(1); - cur++; - goto found; - } - /* - * try to parse an IPv4 - */ - if (ISA_DIGIT(cur)) { - if (xmlParse3986DecOctet(&cur) != 0) - goto not_ipv4; - if (*cur != '.') - goto not_ipv4; - cur++; - if (xmlParse3986DecOctet(&cur) != 0) - goto not_ipv4; - if (*cur != '.') - goto not_ipv4; - if (xmlParse3986DecOctet(&cur) != 0) - goto not_ipv4; - if (*cur != '.') - goto not_ipv4; - if (xmlParse3986DecOctet(&cur) != 0) - goto not_ipv4; - goto found; -not_ipv4: - cur = *str; - } - /* - * then this should be a hostname which can be empty - */ - while (ISA_UNRESERVED(cur) || ISA_PCT_ENCODED(cur) || ISA_SUB_DELIM(cur)) - NEXT(cur); -found: - if (uri != NULL) { - if (uri->authority != NULL) xmlFree(uri->authority); - uri->authority = NULL; - if (uri->server != NULL) xmlFree(uri->server); - if (cur != host) { - if (uri->cleanup & 2) - uri->server = STRNDUP(host, cur - host); - else - uri->server = xmlURIUnescapeString(host, cur - host, NULL); - } else - uri->server = NULL; - } - *str = cur; - return(0); -} - -/** - * xmlParse3986Authority: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an authority part and fills in the appropriate fields - * of the @uri structure - * - * authority = [ userinfo "@" ] host [ ":" port ] - * - * Returns 0 or the error code - */ -static int -xmlParse3986Authority(xmlURIPtr uri, const char **str) -{ - const char *cur; - int ret; - - cur = *str; - /* - * try to parse an userinfo and check for the trailing @ - */ - ret = xmlParse3986Userinfo(uri, &cur); - if ((ret != 0) || (*cur != '@')) - cur = *str; - else - cur++; - ret = xmlParse3986Host(uri, &cur); - if (ret != 0) return(ret); - if (*cur == ':') { - cur++; - ret = xmlParse3986Port(uri, &cur); - if (ret != 0) return(ret); - } - *str = cur; - return(0); -} - -/** - * xmlParse3986Segment: - * @str: the string to analyze - * @forbid: an optional forbidden character - * @empty: allow an empty segment - * - * Parse a segment and fills in the appropriate fields - * of the @uri structure - * - * segment = *pchar - * segment-nz = 1*pchar - * segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" ) - * ; non-zero-length segment without any colon ":" - * - * Returns 0 or the error code - */ -static int -xmlParse3986Segment(const char **str, char forbid, int empty) -{ - const char *cur; - - cur = *str; - if (!ISA_PCHAR(cur)) { - if (empty) - return(0); - return(1); - } - while (ISA_PCHAR(cur) && (*cur != forbid)) - NEXT(cur); - *str = cur; - return (0); -} - -/** - * xmlParse3986PathAbEmpty: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an path absolute or empty and fills in the appropriate fields - * of the @uri structure - * - * path-abempty = *( "/" segment ) - * - * Returns 0 or the error code - */ -static int -xmlParse3986PathAbEmpty(xmlURIPtr uri, const char **str) -{ - const char *cur; - int ret; - - cur = *str; - - while (*cur == '/') { - cur++; - ret = xmlParse3986Segment(&cur, 0, 1); - if (ret != 0) return(ret); - } - if (uri != NULL) { - if (uri->path != NULL) xmlFree(uri->path); - if (*str != cur) { - if (uri->cleanup & 2) - uri->path = STRNDUP(*str, cur - *str); - else - uri->path = xmlURIUnescapeString(*str, cur - *str, NULL); - } else { - uri->path = NULL; - } - } - *str = cur; - return (0); -} - -/** - * xmlParse3986PathAbsolute: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an path absolute and fills in the appropriate fields - * of the @uri structure - * - * path-absolute = "/" [ segment-nz *( "/" segment ) ] - * - * Returns 0 or the error code - */ -static int -xmlParse3986PathAbsolute(xmlURIPtr uri, const char **str) -{ - const char *cur; - int ret; - - cur = *str; - - if (*cur != '/') - return(1); - cur++; - ret = xmlParse3986Segment(&cur, 0, 0); - if (ret == 0) { - while (*cur == '/') { - cur++; - ret = xmlParse3986Segment(&cur, 0, 1); - if (ret != 0) return(ret); - } - } - if (uri != NULL) { - if (uri->path != NULL) xmlFree(uri->path); - if (cur != *str) { - if (uri->cleanup & 2) - uri->path = STRNDUP(*str, cur - *str); - else - uri->path = xmlURIUnescapeString(*str, cur - *str, NULL); - } else { - uri->path = NULL; - } - } - *str = cur; - return (0); -} - -/** - * xmlParse3986PathRootless: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an path without root and fills in the appropriate fields - * of the @uri structure - * - * path-rootless = segment-nz *( "/" segment ) - * - * Returns 0 or the error code - */ -static int -xmlParse3986PathRootless(xmlURIPtr uri, const char **str) -{ - const char *cur; - int ret; - - cur = *str; - - ret = xmlParse3986Segment(&cur, 0, 0); - if (ret != 0) return(ret); - while (*cur == '/') { - cur++; - ret = xmlParse3986Segment(&cur, 0, 1); - if (ret != 0) return(ret); - } - if (uri != NULL) { - if (uri->path != NULL) xmlFree(uri->path); - if (cur != *str) { - if (uri->cleanup & 2) - uri->path = STRNDUP(*str, cur - *str); - else - uri->path = xmlURIUnescapeString(*str, cur - *str, NULL); - } else { - uri->path = NULL; - } - } - *str = cur; - return (0); -} - -/** - * xmlParse3986PathNoScheme: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an path which is not a scheme and fills in the appropriate fields - * of the @uri structure - * - * path-noscheme = segment-nz-nc *( "/" segment ) - * - * Returns 0 or the error code - */ -static int -xmlParse3986PathNoScheme(xmlURIPtr uri, const char **str) -{ - const char *cur; - int ret; - - cur = *str; - - ret = xmlParse3986Segment(&cur, ':', 0); - if (ret != 0) return(ret); - while (*cur == '/') { - cur++; - ret = xmlParse3986Segment(&cur, 0, 1); - if (ret != 0) return(ret); - } - if (uri != NULL) { - if (uri->path != NULL) xmlFree(uri->path); - if (cur != *str) { - if (uri->cleanup & 2) - uri->path = STRNDUP(*str, cur - *str); - else - uri->path = xmlURIUnescapeString(*str, cur - *str, NULL); - } else { - uri->path = NULL; - } - } - *str = cur; - return (0); -} - -/** - * xmlParse3986HierPart: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an hierarchical part and fills in the appropriate fields - * of the @uri structure - * - * hier-part = "//" authority path-abempty - * / path-absolute - * / path-rootless - * / path-empty - * - * Returns 0 or the error code - */ -static int -xmlParse3986HierPart(xmlURIPtr uri, const char **str) -{ - const char *cur; - int ret; - - cur = *str; - - if ((*cur == '/') && (*(cur + 1) == '/')) { - cur += 2; - ret = xmlParse3986Authority(uri, &cur); - if (ret != 0) return(ret); - if (uri->server == NULL) - uri->port = -1; - ret = xmlParse3986PathAbEmpty(uri, &cur); - if (ret != 0) return(ret); - *str = cur; - return(0); - } else if (*cur == '/') { - ret = xmlParse3986PathAbsolute(uri, &cur); - if (ret != 0) return(ret); - } else if (ISA_PCHAR(cur)) { - ret = xmlParse3986PathRootless(uri, &cur); - if (ret != 0) return(ret); - } else { - /* path-empty is effectively empty */ - if (uri != NULL) { - if (uri->path != NULL) xmlFree(uri->path); - uri->path = NULL; - } - } - *str = cur; - return (0); -} - -/** - * xmlParse3986RelativeRef: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an URI string and fills in the appropriate fields - * of the @uri structure - * - * relative-ref = relative-part [ "?" query ] [ "#" fragment ] - * relative-part = "//" authority path-abempty - * / path-absolute - * / path-noscheme - * / path-empty - * - * Returns 0 or the error code - */ -static int -xmlParse3986RelativeRef(xmlURIPtr uri, const char *str) { - int ret; - - if ((*str == '/') && (*(str + 1) == '/')) { - str += 2; - ret = xmlParse3986Authority(uri, &str); - if (ret != 0) return(ret); - ret = xmlParse3986PathAbEmpty(uri, &str); - if (ret != 0) return(ret); - } else if (*str == '/') { - ret = xmlParse3986PathAbsolute(uri, &str); - if (ret != 0) return(ret); - } else if (ISA_PCHAR(str)) { - ret = xmlParse3986PathNoScheme(uri, &str); - if (ret != 0) return(ret); - } else { - /* path-empty is effectively empty */ - if (uri != NULL) { - if (uri->path != NULL) xmlFree(uri->path); - uri->path = NULL; - } - } - - if (*str == '?') { - str++; - ret = xmlParse3986Query(uri, &str); - if (ret != 0) return(ret); - } - if (*str == '#') { - str++; - ret = xmlParse3986Fragment(uri, &str); - if (ret != 0) return(ret); - } - if (*str != 0) { - xmlCleanURI(uri); - return(1); - } - return(0); -} - - -/** - * xmlParse3986URI: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an URI string and fills in the appropriate fields - * of the @uri structure - * - * scheme ":" hier-part [ "?" query ] [ "#" fragment ] - * - * Returns 0 or the error code - */ -static int -xmlParse3986URI(xmlURIPtr uri, const char *str) { - int ret; - - ret = xmlParse3986Scheme(uri, &str); - if (ret != 0) return(ret); - if (*str != ':') { - return(1); - } - str++; - ret = xmlParse3986HierPart(uri, &str); - if (ret != 0) return(ret); - if (*str == '?') { - str++; - ret = xmlParse3986Query(uri, &str); - if (ret != 0) return(ret); - } - if (*str == '#') { - str++; - ret = xmlParse3986Fragment(uri, &str); - if (ret != 0) return(ret); - } - if (*str != 0) { - xmlCleanURI(uri); - return(1); - } - return(0); -} - -/** - * xmlParse3986URIReference: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an URI reference string and fills in the appropriate fields - * of the @uri structure - * - * URI-reference = URI / relative-ref - * - * Returns 0 or the error code - */ -static int -xmlParse3986URIReference(xmlURIPtr uri, const char *str) { - int ret; - - if (str == NULL) - return(-1); - xmlCleanURI(uri); - - /* - * Try first to parse absolute refs, then fallback to relative if - * it fails. - */ - ret = xmlParse3986URI(uri, str); - if (ret != 0) { - xmlCleanURI(uri); - ret = xmlParse3986RelativeRef(uri, str); - if (ret != 0) { - xmlCleanURI(uri); - return(ret); - } - } - return(0); -} - -/** - * xmlParseURI: - * @str: the URI string to analyze - * - * Parse an URI based on RFC 3986 - * - * URI-reference = [ absoluteURI | relativeURI ] [ "#" fragment ] - * - * Returns a newly built xmlURIPtr or NULL in case of error - */ -xmlURIPtr -xmlParseURI(const char *str) { - xmlURIPtr uri; - int ret; - - if (str == NULL) - return(NULL); - uri = xmlCreateURI(); - if (uri != NULL) { - ret = xmlParse3986URIReference(uri, str); - if (ret) { - xmlFreeURI(uri); - return(NULL); - } - } - return(uri); -} - -/** - * xmlParseURIReference: - * @uri: pointer to an URI structure - * @str: the string to analyze - * - * Parse an URI reference string based on RFC 3986 and fills in the - * appropriate fields of the @uri structure - * - * URI-reference = URI / relative-ref - * - * Returns 0 or the error code - */ -int -xmlParseURIReference(xmlURIPtr uri, const char *str) { - return(xmlParse3986URIReference(uri, str)); -} - -/** - * xmlParseURIRaw: - * @str: the URI string to analyze - * @raw: if 1 unescaping of URI pieces are disabled - * - * Parse an URI but allows to keep intact the original fragments. - * - * URI-reference = URI / relative-ref - * - * Returns a newly built xmlURIPtr or NULL in case of error - */ -xmlURIPtr -xmlParseURIRaw(const char *str, int raw) { - xmlURIPtr uri; - int ret; - - if (str == NULL) - return(NULL); - uri = xmlCreateURI(); - if (uri != NULL) { - if (raw) { - uri->cleanup |= 2; - } - ret = xmlParseURIReference(uri, str); - if (ret) { - xmlFreeURI(uri); - return(NULL); - } - } - return(uri); -} - -/************************************************************************ - * * - * Generic URI structure functions * - * * - ************************************************************************/ - -/** - * xmlCreateURI: - * - * Simply creates an empty xmlURI - * - * Returns the new structure or NULL in case of error - */ -xmlURIPtr -xmlCreateURI(void) { - xmlURIPtr ret; - - ret = (xmlURIPtr) xmlMalloc(sizeof(xmlURI)); - if (ret == NULL) { - xmlURIErrMemory("creating URI structure\n"); - return(NULL); - } - memset(ret, 0, sizeof(xmlURI)); - return(ret); -} - -/** - * xmlSaveUriRealloc: - * - * Function to handle properly a reallocation when saving an URI - * Also imposes some limit on the length of an URI string output - */ -static xmlChar * -xmlSaveUriRealloc(xmlChar *ret, int *max) { - xmlChar *temp; - int tmp; - - if (*max > MAX_URI_LENGTH) { - xmlURIErrMemory("reaching arbitrary MAX_URI_LENGTH limit\n"); - return(NULL); - } - tmp = *max * 2; - temp = (xmlChar *) xmlRealloc(ret, (tmp + 1)); - if (temp == NULL) { - xmlURIErrMemory("saving URI\n"); - return(NULL); - } - *max = tmp; - return(temp); -} - -/** - * xmlSaveUri: - * @uri: pointer to an xmlURI - * - * Save the URI as an escaped string - * - * Returns a new string (to be deallocated by caller) - */ -xmlChar * -xmlSaveUri(xmlURIPtr uri) { - xmlChar *ret = NULL; - xmlChar *temp; - const char *p; - int len; - int max; - - if (uri == NULL) return(NULL); - - - max = 80; - ret = (xmlChar *) xmlMallocAtomic((max + 1) * sizeof(xmlChar)); - if (ret == NULL) { - xmlURIErrMemory("saving URI\n"); - return(NULL); - } - len = 0; - - if (uri->scheme != NULL) { - p = uri->scheme; - while (*p != 0) { - if (len >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = *p++; - } - if (len >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = ':'; - } - if (uri->opaque != NULL) { - p = uri->opaque; - while (*p != 0) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - if (IS_RESERVED(*(p)) || IS_UNRESERVED(*(p))) - ret[len++] = *p++; - else { - int val = *(unsigned char *)p++; - int hi = val / 0x10, lo = val % 0x10; - ret[len++] = '%'; - ret[len++] = hi + (hi > 9? 'A'-10 : '0'); - ret[len++] = lo + (lo > 9? 'A'-10 : '0'); - } - } - } else { - if ((uri->server != NULL) || (uri->port == -1)) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = '/'; - ret[len++] = '/'; - if (uri->user != NULL) { - p = uri->user; - while (*p != 0) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - if ((IS_UNRESERVED(*(p))) || - ((*(p) == ';')) || ((*(p) == ':')) || - ((*(p) == '&')) || ((*(p) == '=')) || - ((*(p) == '+')) || ((*(p) == '$')) || - ((*(p) == ','))) - ret[len++] = *p++; - else { - int val = *(unsigned char *)p++; - int hi = val / 0x10, lo = val % 0x10; - ret[len++] = '%'; - ret[len++] = hi + (hi > 9? 'A'-10 : '0'); - ret[len++] = lo + (lo > 9? 'A'-10 : '0'); - } - } - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = '@'; - } - if (uri->server != NULL) { - p = uri->server; - while (*p != 0) { - if (len >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = *p++; - } - if (uri->port > 0) { - if (len + 10 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - len += snprintf((char *) &ret[len], max - len, ":%d", uri->port); - } - } - } else if (uri->authority != NULL) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = '/'; - ret[len++] = '/'; - p = uri->authority; - while (*p != 0) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - if ((IS_UNRESERVED(*(p))) || - ((*(p) == '$')) || ((*(p) == ',')) || ((*(p) == ';')) || - ((*(p) == ':')) || ((*(p) == '@')) || ((*(p) == '&')) || - ((*(p) == '=')) || ((*(p) == '+'))) - ret[len++] = *p++; - else { - int val = *(unsigned char *)p++; - int hi = val / 0x10, lo = val % 0x10; - ret[len++] = '%'; - ret[len++] = hi + (hi > 9? 'A'-10 : '0'); - ret[len++] = lo + (lo > 9? 'A'-10 : '0'); - } - } - } else if (uri->scheme != NULL) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - } - if (uri->path != NULL) { - p = uri->path; - /* - * the colon in file:///d: should not be escaped or - * Windows accesses fail later. - */ - if ((uri->scheme != NULL) && - (p[0] == '/') && - (((p[1] >= 'a') && (p[1] <= 'z')) || - ((p[1] >= 'A') && (p[1] <= 'Z'))) && - (p[2] == ':') && - (xmlStrEqual(BAD_CAST uri->scheme, BAD_CAST "file"))) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = *p++; - ret[len++] = *p++; - ret[len++] = *p++; - } - while (*p != 0) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - if ((IS_UNRESERVED(*(p))) || ((*(p) == '/')) || - ((*(p) == ';')) || ((*(p) == '@')) || ((*(p) == '&')) || - ((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) || - ((*(p) == ','))) - ret[len++] = *p++; - else { - int val = *(unsigned char *)p++; - int hi = val / 0x10, lo = val % 0x10; - ret[len++] = '%'; - ret[len++] = hi + (hi > 9? 'A'-10 : '0'); - ret[len++] = lo + (lo > 9? 'A'-10 : '0'); - } - } - } - if (uri->query_raw != NULL) { - if (len + 1 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = '?'; - p = uri->query_raw; - while (*p != 0) { - if (len + 1 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = *p++; - } - } else if (uri->query != NULL) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = '?'; - p = uri->query; - while (*p != 0) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - if ((IS_UNRESERVED(*(p))) || (IS_RESERVED(*(p)))) - ret[len++] = *p++; - else { - int val = *(unsigned char *)p++; - int hi = val / 0x10, lo = val % 0x10; - ret[len++] = '%'; - ret[len++] = hi + (hi > 9? 'A'-10 : '0'); - ret[len++] = lo + (lo > 9? 'A'-10 : '0'); - } - } - } - } - if (uri->fragment != NULL) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len++] = '#'; - p = uri->fragment; - while (*p != 0) { - if (len + 3 >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - if ((IS_UNRESERVED(*(p))) || (IS_RESERVED(*(p)))) - ret[len++] = *p++; - else { - int val = *(unsigned char *)p++; - int hi = val / 0x10, lo = val % 0x10; - ret[len++] = '%'; - ret[len++] = hi + (hi > 9? 'A'-10 : '0'); - ret[len++] = lo + (lo > 9? 'A'-10 : '0'); - } - } - } - if (len >= max) { - temp = xmlSaveUriRealloc(ret, &max); - if (temp == NULL) goto mem_error; - ret = temp; - } - ret[len] = 0; - return(ret); - -mem_error: - xmlFree(ret); - return(NULL); -} - -/** - * xmlPrintURI: - * @stream: a FILE* for the output - * @uri: pointer to an xmlURI - * - * Prints the URI in the stream @stream. - */ -void -xmlPrintURI(FILE *stream, xmlURIPtr uri) { - xmlChar *out; - - out = xmlSaveUri(uri); - if (out != NULL) { - fprintf(stream, "%s", (char *) out); - xmlFree(out); - } -} - -/** - * xmlCleanURI: - * @uri: pointer to an xmlURI - * - * Make sure the xmlURI struct is free of content - */ -static void -xmlCleanURI(xmlURIPtr uri) { - if (uri == NULL) return; - - if (uri->scheme != NULL) xmlFree(uri->scheme); - uri->scheme = NULL; - if (uri->server != NULL) xmlFree(uri->server); - uri->server = NULL; - if (uri->user != NULL) xmlFree(uri->user); - uri->user = NULL; - if (uri->path != NULL) xmlFree(uri->path); - uri->path = NULL; - if (uri->fragment != NULL) xmlFree(uri->fragment); - uri->fragment = NULL; - if (uri->opaque != NULL) xmlFree(uri->opaque); - uri->opaque = NULL; - if (uri->authority != NULL) xmlFree(uri->authority); - uri->authority = NULL; - if (uri->query != NULL) xmlFree(uri->query); - uri->query = NULL; - if (uri->query_raw != NULL) xmlFree(uri->query_raw); - uri->query_raw = NULL; -} - -/** - * xmlFreeURI: - * @uri: pointer to an xmlURI - * - * Free up the xmlURI struct - */ -void -xmlFreeURI(xmlURIPtr uri) { - if (uri == NULL) return; - - if (uri->scheme != NULL) xmlFree(uri->scheme); - if (uri->server != NULL) xmlFree(uri->server); - if (uri->user != NULL) xmlFree(uri->user); - if (uri->path != NULL) xmlFree(uri->path); - if (uri->fragment != NULL) xmlFree(uri->fragment); - if (uri->opaque != NULL) xmlFree(uri->opaque); - if (uri->authority != NULL) xmlFree(uri->authority); - if (uri->query != NULL) xmlFree(uri->query); - if (uri->query_raw != NULL) xmlFree(uri->query_raw); - xmlFree(uri); -} - -/************************************************************************ - * * - * Helper functions * - * * - ************************************************************************/ - -/** - * xmlNormalizeURIPath: - * @path: pointer to the path string - * - * Applies the 5 normalization steps to a path string--that is, RFC 2396 - * Section 5.2, steps 6.c through 6.g. - * - * Normalization occurs directly on the string, no new allocation is done - * - * Returns 0 or an error code - */ -int -xmlNormalizeURIPath(char *path) { - char *cur, *out; - - if (path == NULL) - return(-1); - - /* Skip all initial "/" chars. We want to get to the beginning of the - * first non-empty segment. - */ - cur = path; - while (cur[0] == '/') - ++cur; - if (cur[0] == '\0') - return(0); - - /* Keep everything we've seen so far. */ - out = cur; - - /* - * Analyze each segment in sequence for cases (c) and (d). - */ - while (cur[0] != '\0') { - /* - * c) All occurrences of "./", where "." is a complete path segment, - * are removed from the buffer string. - */ - if ((cur[0] == '.') && (cur[1] == '/')) { - cur += 2; - /* '//' normalization should be done at this point too */ - while (cur[0] == '/') - cur++; - continue; - } - - /* - * d) If the buffer string ends with "." as a complete path segment, - * that "." is removed. - */ - if ((cur[0] == '.') && (cur[1] == '\0')) - break; - - /* Otherwise keep the segment. */ - while (cur[0] != '/') { - if (cur[0] == '\0') - goto done_cd; - (out++)[0] = (cur++)[0]; - } - /* nomalize // */ - while ((cur[0] == '/') && (cur[1] == '/')) - cur++; - - (out++)[0] = (cur++)[0]; - } - done_cd: - out[0] = '\0'; - - /* Reset to the beginning of the first segment for the next sequence. */ - cur = path; - while (cur[0] == '/') - ++cur; - if (cur[0] == '\0') - return(0); - - /* - * Analyze each segment in sequence for cases (e) and (f). - * - * e) All occurrences of "<segment>/../", where <segment> is a - * complete path segment not equal to "..", are removed from the - * buffer string. Removal of these path segments is performed - * iteratively, removing the leftmost matching pattern on each - * iteration, until no matching pattern remains. - * - * f) If the buffer string ends with "<segment>/..", where <segment> - * is a complete path segment not equal to "..", that - * "<segment>/.." is removed. - * - * To satisfy the "iterative" clause in (e), we need to collapse the - * string every time we find something that needs to be removed. Thus, - * we don't need to keep two pointers into the string: we only need a - * "current position" pointer. - */ - while (1) { - char *segp, *tmp; - - /* At the beginning of each iteration of this loop, "cur" points to - * the first character of the segment we want to examine. - */ - - /* Find the end of the current segment. */ - segp = cur; - while ((segp[0] != '/') && (segp[0] != '\0')) - ++segp; - - /* If this is the last segment, we're done (we need at least two - * segments to meet the criteria for the (e) and (f) cases). - */ - if (segp[0] == '\0') - break; - - /* If the first segment is "..", or if the next segment _isn't_ "..", - * keep this segment and try the next one. - */ - ++segp; - if (((cur[0] == '.') && (cur[1] == '.') && (segp == cur+3)) - || ((segp[0] != '.') || (segp[1] != '.') - || ((segp[2] != '/') && (segp[2] != '\0')))) { - cur = segp; - continue; - } - - /* If we get here, remove this segment and the next one and back up - * to the previous segment (if there is one), to implement the - * "iteratively" clause. It's pretty much impossible to back up - * while maintaining two pointers into the buffer, so just compact - * the whole buffer now. - */ - - /* If this is the end of the buffer, we're done. */ - if (segp[2] == '\0') { - cur[0] = '\0'; - break; - } - /* Valgrind complained, strcpy(cur, segp + 3); */ - /* string will overlap, do not use strcpy */ - tmp = cur; - segp += 3; - while ((*tmp++ = *segp++) != 0) - ; - - /* If there are no previous segments, then keep going from here. */ - segp = cur; - while ((segp > path) && ((--segp)[0] == '/')) - ; - if (segp == path) - continue; - - /* "segp" is pointing to the end of a previous segment; find it's - * start. We need to back up to the previous segment and start - * over with that to handle things like "foo/bar/../..". If we - * don't do this, then on the first pass we'll remove the "bar/..", - * but be pointing at the second ".." so we won't realize we can also - * remove the "foo/..". - */ - cur = segp; - while ((cur > path) && (cur[-1] != '/')) - --cur; - } - out[0] = '\0'; - - /* - * g) If the resulting buffer string still begins with one or more - * complete path segments of "..", then the reference is - * considered to be in error. Implementations may handle this - * error by retaining these components in the resolved path (i.e., - * treating them as part of the final URI), by removing them from - * the resolved path (i.e., discarding relative levels above the - * root), or by avoiding traversal of the reference. - * - * We discard them from the final path. - */ - if (path[0] == '/') { - cur = path; - while ((cur[0] == '/') && (cur[1] == '.') && (cur[2] == '.') - && ((cur[3] == '/') || (cur[3] == '\0'))) - cur += 3; - - if (cur != path) { - out = path; - while (cur[0] != '\0') - (out++)[0] = (cur++)[0]; - out[0] = 0; - } - } - - return(0); -} - -static int is_hex(char c) { - if (((c >= '0') && (c <= '9')) || - ((c >= 'a') && (c <= 'f')) || - ((c >= 'A') && (c <= 'F'))) - return(1); - return(0); -} - -/** - * xmlURIUnescapeString: - * @str: the string to unescape - * @len: the length in bytes to unescape (or <= 0 to indicate full string) - * @target: optional destination buffer - * - * Unescaping routine, but does not check that the string is an URI. The - * output is a direct unsigned char translation of %XX values (no encoding) - * Note that the length of the result can only be smaller or same size as - * the input string. - * - * Returns a copy of the string, but unescaped, will return NULL only in case - * of error - */ -char * -xmlURIUnescapeString(const char *str, int len, char *target) { - char *ret, *out; - const char *in; - - if (str == NULL) - return(NULL); - if (len <= 0) len = strlen(str); - if (len < 0) return(NULL); - - if (target == NULL) { - ret = (char *) xmlMallocAtomic(len + 1); - if (ret == NULL) { - xmlURIErrMemory("unescaping URI value\n"); - return(NULL); - } - } else - ret = target; - in = str; - out = ret; - while(len > 0) { - if ((len > 2) && (*in == '%') && (is_hex(in[1])) && (is_hex(in[2]))) { - in++; - if ((*in >= '0') && (*in <= '9')) - *out = (*in - '0'); - else if ((*in >= 'a') && (*in <= 'f')) - *out = (*in - 'a') + 10; - else if ((*in >= 'A') && (*in <= 'F')) - *out = (*in - 'A') + 10; - in++; - if ((*in >= '0') && (*in <= '9')) - *out = *out * 16 + (*in - '0'); - else if ((*in >= 'a') && (*in <= 'f')) - *out = *out * 16 + (*in - 'a') + 10; - else if ((*in >= 'A') && (*in <= 'F')) - *out = *out * 16 + (*in - 'A') + 10; - in++; - len -= 3; - out++; - } else { - *out++ = *in++; - len--; - } - } - *out = 0; - return(ret); -} - -/** - * xmlURIEscapeStr: - * @str: string to escape - * @list: exception list string of chars not to escape - * - * This routine escapes a string to hex, ignoring reserved characters (a-z) - * and the characters in the exception list. - * - * Returns a new escaped string or NULL in case of error. - */ -xmlChar * -xmlURIEscapeStr(const xmlChar *str, const xmlChar *list) { - xmlChar *ret, ch; - xmlChar *temp; - const xmlChar *in; - int len, out; - - if (str == NULL) - return(NULL); - if (str[0] == 0) - return(xmlStrdup(str)); - len = xmlStrlen(str); - if (!(len > 0)) return(NULL); - - len += 20; - ret = (xmlChar *) xmlMallocAtomic(len); - if (ret == NULL) { - xmlURIErrMemory("escaping URI value\n"); - return(NULL); - } - in = (const xmlChar *) str; - out = 0; - while(*in != 0) { - if (len - out <= 3) { - temp = xmlSaveUriRealloc(ret, &len); - if (temp == NULL) { - xmlURIErrMemory("escaping URI value\n"); - xmlFree(ret); - return(NULL); - } - ret = temp; - } - - ch = *in; - - if ((ch != '@') && (!IS_UNRESERVED(ch)) && (!xmlStrchr(list, ch))) { - unsigned char val; - ret[out++] = '%'; - val = ch >> 4; - if (val <= 9) - ret[out++] = '0' + val; - else - ret[out++] = 'A' + val - 0xA; - val = ch & 0xF; - if (val <= 9) - ret[out++] = '0' + val; - else - ret[out++] = 'A' + val - 0xA; - in++; - } else { - ret[out++] = *in++; - } - - } - ret[out] = 0; - return(ret); -} - -/** - * xmlURIEscape: - * @str: the string of the URI to escape - * - * Escaping routine, does not do validity checks ! - * It will try to escape the chars needing this, but this is heuristic - * based it's impossible to be sure. - * - * Returns an copy of the string, but escaped - * - * 25 May 2001 - * Uses xmlParseURI and xmlURIEscapeStr to try to escape correctly - * according to RFC2396. - * - Carl Douglas - */ -xmlChar * -xmlURIEscape(const xmlChar * str) -{ - xmlChar *ret, *segment = NULL; - xmlURIPtr uri; - int ret2; - -#define NULLCHK(p) if(!p) { \ - xmlURIErrMemory("escaping URI value\n"); \ - xmlFreeURI(uri); \ - return NULL; } \ - - if (str == NULL) - return (NULL); - - uri = xmlCreateURI(); - if (uri != NULL) { - /* - * Allow escaping errors in the unescaped form - */ - uri->cleanup = 1; - ret2 = xmlParseURIReference(uri, (const char *)str); - if (ret2) { - xmlFreeURI(uri); - return (NULL); - } - } - - if (!uri) - return NULL; - - ret = NULL; - - if (uri->scheme) { - segment = xmlURIEscapeStr(BAD_CAST uri->scheme, BAD_CAST "+-."); - NULLCHK(segment) - ret = xmlStrcat(ret, segment); - ret = xmlStrcat(ret, BAD_CAST ":"); - xmlFree(segment); - } - - if (uri->authority) { - segment = - xmlURIEscapeStr(BAD_CAST uri->authority, BAD_CAST "/?;:@"); - NULLCHK(segment) - ret = xmlStrcat(ret, BAD_CAST "//"); - ret = xmlStrcat(ret, segment); - xmlFree(segment); - } - - if (uri->user) { - segment = xmlURIEscapeStr(BAD_CAST uri->user, BAD_CAST ";:&=+$,"); - NULLCHK(segment) - ret = xmlStrcat(ret,BAD_CAST "//"); - ret = xmlStrcat(ret, segment); - ret = xmlStrcat(ret, BAD_CAST "@"); - xmlFree(segment); - } - - if (uri->server) { - segment = xmlURIEscapeStr(BAD_CAST uri->server, BAD_CAST "/?;:@"); - NULLCHK(segment) - if (uri->user == NULL) - ret = xmlStrcat(ret, BAD_CAST "//"); - ret = xmlStrcat(ret, segment); - xmlFree(segment); - } - - if (uri->port) { - xmlChar port[10]; - - snprintf((char *) port, 10, "%d", uri->port); - ret = xmlStrcat(ret, BAD_CAST ":"); - ret = xmlStrcat(ret, port); - } - - if (uri->path) { - segment = - xmlURIEscapeStr(BAD_CAST uri->path, BAD_CAST ":@&=+$,/?;"); - NULLCHK(segment) - ret = xmlStrcat(ret, segment); - xmlFree(segment); - } - - if (uri->query_raw) { - ret = xmlStrcat(ret, BAD_CAST "?"); - ret = xmlStrcat(ret, BAD_CAST uri->query_raw); - } - else if (uri->query) { - segment = - xmlURIEscapeStr(BAD_CAST uri->query, BAD_CAST ";/?:@&=+,$"); - NULLCHK(segment) - ret = xmlStrcat(ret, BAD_CAST "?"); - ret = xmlStrcat(ret, segment); - xmlFree(segment); - } - - if (uri->opaque) { - segment = xmlURIEscapeStr(BAD_CAST uri->opaque, BAD_CAST ""); - NULLCHK(segment) - ret = xmlStrcat(ret, segment); - xmlFree(segment); - } - - if (uri->fragment) { - segment = xmlURIEscapeStr(BAD_CAST uri->fragment, BAD_CAST "#"); - NULLCHK(segment) - ret = xmlStrcat(ret, BAD_CAST "#"); - ret = xmlStrcat(ret, segment); - xmlFree(segment); - } - - xmlFreeURI(uri); -#undef NULLCHK - - return (ret); -} - -/************************************************************************ - * * - * Public functions * - * * - ************************************************************************/ - -/** - * xmlBuildURI: - * @URI: the URI instance found in the document - * @base: the base value - * - * Computes he final URI of the reference done by checking that - * the given URI is valid, and building the final URI using the - * base URI. This is processed according to section 5.2 of the - * RFC 2396 - * - * 5.2. Resolving Relative References to Absolute Form - * - * Returns a new URI string (to be freed by the caller) or NULL in case - * of error. - */ -xmlChar * -xmlBuildURI(const xmlChar *URI, const xmlChar *base) { - xmlChar *val = NULL; - int ret, len, indx, cur, out; - xmlURIPtr ref = NULL; - xmlURIPtr bas = NULL; - xmlURIPtr res = NULL; - - /* - * 1) The URI reference is parsed into the potential four components and - * fragment identifier, as described in Section 4.3. - * - * NOTE that a completely empty URI is treated by modern browsers - * as a reference to "." rather than as a synonym for the current - * URI. Should we do that here? - */ - if (URI == NULL) - ret = -1; - else { - if (*URI) { - ref = xmlCreateURI(); - if (ref == NULL) - goto done; - ret = xmlParseURIReference(ref, (const char *) URI); - } - else - ret = 0; - } - if (ret != 0) - goto done; - if ((ref != NULL) && (ref->scheme != NULL)) { - /* - * The URI is absolute don't modify. - */ - val = xmlStrdup(URI); - goto done; - } - if (base == NULL) - ret = -1; - else { - bas = xmlCreateURI(); - if (bas == NULL) - goto done; - ret = xmlParseURIReference(bas, (const char *) base); - } - if (ret != 0) { - if (ref) - val = xmlSaveUri(ref); - goto done; - } - if (ref == NULL) { - /* - * the base fragment must be ignored - */ - if (bas->fragment != NULL) { - xmlFree(bas->fragment); - bas->fragment = NULL; - } - val = xmlSaveUri(bas); - goto done; - } - - /* - * 2) If the path component is empty and the scheme, authority, and - * query components are undefined, then it is a reference to the - * current document and we are done. Otherwise, the reference URI's - * query and fragment components are defined as found (or not found) - * within the URI reference and not inherited from the base URI. - * - * NOTE that in modern browsers, the parsing differs from the above - * in the following aspect: the query component is allowed to be - * defined while still treating this as a reference to the current - * document. - */ - res = xmlCreateURI(); - if (res == NULL) - goto done; - if ((ref->scheme == NULL) && (ref->path == NULL) && - ((ref->authority == NULL) && (ref->server == NULL))) { - if (bas->scheme != NULL) - res->scheme = xmlMemStrdup(bas->scheme); - if (bas->authority != NULL) - res->authority = xmlMemStrdup(bas->authority); - else if (bas->server != NULL) { - res->server = xmlMemStrdup(bas->server); - if (bas->user != NULL) - res->user = xmlMemStrdup(bas->user); - res->port = bas->port; - } - if (bas->path != NULL) - res->path = xmlMemStrdup(bas->path); - if (ref->query_raw != NULL) - res->query_raw = xmlMemStrdup (ref->query_raw); - else if (ref->query != NULL) - res->query = xmlMemStrdup(ref->query); - else if (bas->query_raw != NULL) - res->query_raw = xmlMemStrdup(bas->query_raw); - else if (bas->query != NULL) - res->query = xmlMemStrdup(bas->query); - if (ref->fragment != NULL) - res->fragment = xmlMemStrdup(ref->fragment); - goto step_7; - } - - /* - * 3) If the scheme component is defined, indicating that the reference - * starts with a scheme name, then the reference is interpreted as an - * absolute URI and we are done. Otherwise, the reference URI's - * scheme is inherited from the base URI's scheme component. - */ - if (ref->scheme != NULL) { - val = xmlSaveUri(ref); - goto done; - } - if (bas->scheme != NULL) - res->scheme = xmlMemStrdup(bas->scheme); - - if (ref->query_raw != NULL) - res->query_raw = xmlMemStrdup(ref->query_raw); - else if (ref->query != NULL) - res->query = xmlMemStrdup(ref->query); - if (ref->fragment != NULL) - res->fragment = xmlMemStrdup(ref->fragment); - - /* - * 4) If the authority component is defined, then the reference is a - * network-path and we skip to step 7. Otherwise, the reference - * URI's authority is inherited from the base URI's authority - * component, which will also be undefined if the URI scheme does not - * use an authority component. - */ - if ((ref->authority != NULL) || (ref->server != NULL)) { - if (ref->authority != NULL) - res->authority = xmlMemStrdup(ref->authority); - else { - res->server = xmlMemStrdup(ref->server); - if (ref->user != NULL) - res->user = xmlMemStrdup(ref->user); - res->port = ref->port; - } - if (ref->path != NULL) - res->path = xmlMemStrdup(ref->path); - goto step_7; - } - if (bas->authority != NULL) - res->authority = xmlMemStrdup(bas->authority); - else if (bas->server != NULL) { - res->server = xmlMemStrdup(bas->server); - if (bas->user != NULL) - res->user = xmlMemStrdup(bas->user); - res->port = bas->port; - } - - /* - * 5) If the path component begins with a slash character ("/"), then - * the reference is an absolute-path and we skip to step 7. - */ - if ((ref->path != NULL) && (ref->path[0] == '/')) { - res->path = xmlMemStrdup(ref->path); - goto step_7; - } - - - /* - * 6) If this step is reached, then we are resolving a relative-path - * reference. The relative path needs to be merged with the base - * URI's path. Although there are many ways to do this, we will - * describe a simple method using a separate string buffer. - * - * Allocate a buffer large enough for the result string. - */ - len = 2; /* extra / and 0 */ - if (ref->path != NULL) - len += strlen(ref->path); - if (bas->path != NULL) - len += strlen(bas->path); - res->path = (char *) xmlMallocAtomic(len); - if (res->path == NULL) { - xmlURIErrMemory("resolving URI against base\n"); - goto done; - } - res->path[0] = 0; - - /* - * a) All but the last segment of the base URI's path component is - * copied to the buffer. In other words, any characters after the - * last (right-most) slash character, if any, are excluded. - */ - cur = 0; - out = 0; - if (bas->path != NULL) { - while (bas->path[cur] != 0) { - while ((bas->path[cur] != 0) && (bas->path[cur] != '/')) - cur++; - if (bas->path[cur] == 0) - break; - - cur++; - while (out < cur) { - res->path[out] = bas->path[out]; - out++; - } - } - } - res->path[out] = 0; - - /* - * b) The reference's path component is appended to the buffer - * string. - */ - if (ref->path != NULL && ref->path[0] != 0) { - indx = 0; - /* - * Ensure the path includes a '/' - */ - if ((out == 0) && (bas->server != NULL)) - res->path[out++] = '/'; - while (ref->path[indx] != 0) { - res->path[out++] = ref->path[indx++]; - } - } - res->path[out] = 0; - - /* - * Steps c) to h) are really path normalization steps - */ - xmlNormalizeURIPath(res->path); - -step_7: - - /* - * 7) The resulting URI components, including any inherited from the - * base URI, are recombined to give the absolute form of the URI - * reference. - */ - val = xmlSaveUri(res); - -done: - if (ref != NULL) - xmlFreeURI(ref); - if (bas != NULL) - xmlFreeURI(bas); - if (res != NULL) - xmlFreeURI(res); - return(val); -} - -/** - * xmlBuildRelativeURI: - * @URI: the URI reference under consideration - * @base: the base value - * - * Expresses the URI of the reference in terms relative to the - * base. Some examples of this operation include: - * base = "http://site1.com/docs/book1.html" - * URI input URI returned - * docs/pic1.gif pic1.gif - * docs/img/pic1.gif img/pic1.gif - * img/pic1.gif ../img/pic1.gif - * http://site1.com/docs/pic1.gif pic1.gif - * http://site2.com/docs/pic1.gif http://site2.com/docs/pic1.gif - * - * base = "docs/book1.html" - * URI input URI returned - * docs/pic1.gif pic1.gif - * docs/img/pic1.gif img/pic1.gif - * img/pic1.gif ../img/pic1.gif - * http://site1.com/docs/pic1.gif http://site1.com/docs/pic1.gif - * - * - * Note: if the URI reference is really wierd or complicated, it may be - * worthwhile to first convert it into a "nice" one by calling - * xmlBuildURI (using 'base') before calling this routine, - * since this routine (for reasonable efficiency) assumes URI has - * already been through some validation. - * - * Returns a new URI string (to be freed by the caller) or NULL in case - * error. - */ -xmlChar * -xmlBuildRelativeURI (const xmlChar * URI, const xmlChar * base) -{ - xmlChar *val = NULL; - int ret; - int ix; - int pos = 0; - int nbslash = 0; - int len; - xmlURIPtr ref = NULL; - xmlURIPtr bas = NULL; - xmlChar *bptr, *uptr, *vptr; - int remove_path = 0; - - if ((URI == NULL) || (*URI == 0)) - return NULL; - - /* - * First parse URI into a standard form - */ - ref = xmlCreateURI (); - if (ref == NULL) - return NULL; - /* If URI not already in "relative" form */ - if (URI[0] != '.') { - ret = xmlParseURIReference (ref, (const char *) URI); - if (ret != 0) - goto done; /* Error in URI, return NULL */ - } else - ref->path = (char *)xmlStrdup(URI); - - /* - * Next parse base into the same standard form - */ - if ((base == NULL) || (*base == 0)) { - val = xmlStrdup (URI); - goto done; - } - bas = xmlCreateURI (); - if (bas == NULL) - goto done; - if (base[0] != '.') { - ret = xmlParseURIReference (bas, (const char *) base); - if (ret != 0) - goto done; /* Error in base, return NULL */ - } else - bas->path = (char *)xmlStrdup(base); - - /* - * If the scheme / server on the URI differs from the base, - * just return the URI - */ - if ((ref->scheme != NULL) && - ((bas->scheme == NULL) || - (xmlStrcmp ((xmlChar *)bas->scheme, (xmlChar *)ref->scheme)) || - (xmlStrcmp ((xmlChar *)bas->server, (xmlChar *)ref->server)))) { - val = xmlStrdup (URI); - goto done; - } - if (xmlStrEqual((xmlChar *)bas->path, (xmlChar *)ref->path)) { - val = xmlStrdup(BAD_CAST ""); - goto done; - } - if (bas->path == NULL) { - val = xmlStrdup((xmlChar *)ref->path); - goto done; - } - if (ref->path == NULL) { - ref->path = (char *) "/"; - remove_path = 1; - } - - /* - * At this point (at last!) we can compare the two paths - * - * First we take care of the special case where either of the - * two path components may be missing (bug 316224) - */ - if (bas->path == NULL) { - if (ref->path != NULL) { - uptr = (xmlChar *) ref->path; - if (*uptr == '/') - uptr++; - /* exception characters from xmlSaveUri */ - val = xmlURIEscapeStr(uptr, BAD_CAST "/;&=+$,"); - } - goto done; - } - bptr = (xmlChar *)bas->path; - if (ref->path == NULL) { - for (ix = 0; bptr[ix] != 0; ix++) { - if (bptr[ix] == '/') - nbslash++; - } - uptr = NULL; - len = 1; /* this is for a string terminator only */ - } else { - /* - * Next we compare the two strings and find where they first differ - */ - if ((ref->path[pos] == '.') && (ref->path[pos+1] == '/')) - pos += 2; - if ((*bptr == '.') && (bptr[1] == '/')) - bptr += 2; - else if ((*bptr == '/') && (ref->path[pos] != '/')) - bptr++; - while ((bptr[pos] == ref->path[pos]) && (bptr[pos] != 0)) - pos++; - - if (bptr[pos] == ref->path[pos]) { - val = xmlStrdup(BAD_CAST ""); - goto done; /* (I can't imagine why anyone would do this) */ - } - - /* - * In URI, "back up" to the last '/' encountered. This will be the - * beginning of the "unique" suffix of URI - */ - ix = pos; - if ((ref->path[ix] == '/') && (ix > 0)) - ix--; - else if ((ref->path[ix] == 0) && (ix > 1) && (ref->path[ix - 1] == '/')) - ix -= 2; - for (; ix > 0; ix--) { - if (ref->path[ix] == '/') - break; - } - if (ix == 0) { - uptr = (xmlChar *)ref->path; - } else { - ix++; - uptr = (xmlChar *)&ref->path[ix]; - } - - /* - * In base, count the number of '/' from the differing point - */ - if (bptr[pos] != ref->path[pos]) {/* check for trivial URI == base */ - for (; bptr[ix] != 0; ix++) { - if (bptr[ix] == '/') - nbslash++; - } - } - len = xmlStrlen (uptr) + 1; - } - - if (nbslash == 0) { - if (uptr != NULL) - /* exception characters from xmlSaveUri */ - val = xmlURIEscapeStr(uptr, BAD_CAST "/;&=+$,"); - goto done; - } - - /* - * Allocate just enough space for the returned string - - * length of the remainder of the URI, plus enough space - * for the "../" groups, plus one for the terminator - */ - val = (xmlChar *) xmlMalloc (len + 3 * nbslash); - if (val == NULL) { - xmlURIErrMemory("building relative URI\n"); - goto done; - } - vptr = val; - /* - * Put in as many "../" as needed - */ - for (; nbslash>0; nbslash--) { - *vptr++ = '.'; - *vptr++ = '.'; - *vptr++ = '/'; - } - /* - * Finish up with the end of the URI - */ - if (uptr != NULL) { - if ((vptr > val) && (len > 0) && - (uptr[0] == '/') && (vptr[-1] == '/')) { - memcpy (vptr, uptr + 1, len - 1); - vptr[len - 2] = 0; - } else { - memcpy (vptr, uptr, len); - vptr[len - 1] = 0; - } - } else { - vptr[len - 1] = 0; - } - - /* escape the freshly-built path */ - vptr = val; - /* exception characters from xmlSaveUri */ - val = xmlURIEscapeStr(vptr, BAD_CAST "/;&=+$,"); - xmlFree(vptr); - -done: - /* - * Free the working variables - */ - if (remove_path != 0) - ref->path = NULL; - if (ref != NULL) - xmlFreeURI (ref); - if (bas != NULL) - xmlFreeURI (bas); - - return val; -} - -/** - * xmlCanonicPath: - * @path: the resource locator in a filesystem notation - * - * Constructs a canonic path from the specified path. - * - * Returns a new canonic path, or a duplicate of the path parameter if the - * construction fails. The caller is responsible for freeing the memory occupied - * by the returned string. If there is insufficient memory available, or the - * argument is NULL, the function returns NULL. - */ -#define IS_WINDOWS_PATH(p) \ - ((p != NULL) && \ - (((p[0] >= 'a') && (p[0] <= 'z')) || \ - ((p[0] >= 'A') && (p[0] <= 'Z'))) && \ - (p[1] == ':') && ((p[2] == '/') || (p[2] == '\\'))) -xmlChar * -xmlCanonicPath(const xmlChar *path) -{ -/* - * For Windows implementations, additional work needs to be done to - * replace backslashes in pathnames with "forward slashes" - */ -#if defined(_WIN32) && !defined(__CYGWIN__) - int len = 0; - int i = 0; - xmlChar *p = NULL; -#endif - xmlURIPtr uri; - xmlChar *ret; - const xmlChar *absuri; - - if (path == NULL) - return(NULL); - -#if defined(_WIN32) - /* - * We must not change the backslashes to slashes if the the path - * starts with \\?\ - * Those paths can be up to 32k characters long. - * Was added specifically for OpenOffice, those paths can't be converted - * to URIs anyway. - */ - if ((path[0] == '\\') && (path[1] == '\\') && (path[2] == '?') && - (path[3] == '\\') ) - return xmlStrdup((const xmlChar *) path); -#endif - - /* sanitize filename starting with // so it can be used as URI */ - if ((path[0] == '/') && (path[1] == '/') && (path[2] != '/')) - path++; - - if ((uri = xmlParseURI((const char *) path)) != NULL) { - xmlFreeURI(uri); - return xmlStrdup(path); - } - - /* Check if this is an "absolute uri" */ - absuri = xmlStrstr(path, BAD_CAST "://"); - if (absuri != NULL) { - int l, j; - unsigned char c; - xmlChar *escURI; - - /* - * this looks like an URI where some parts have not been - * escaped leading to a parsing problem. Check that the first - * part matches a protocol. - */ - l = absuri - path; - /* Bypass if first part (part before the '://') is > 20 chars */ - if ((l <= 0) || (l > 20)) - goto path_processing; - /* Bypass if any non-alpha characters are present in first part */ - for (j = 0;j < l;j++) { - c = path[j]; - if (!(((c >= 'a') && (c <= 'z')) || ((c >= 'A') && (c <= 'Z')))) - goto path_processing; - } - - /* Escape all except the characters specified in the supplied path */ - escURI = xmlURIEscapeStr(path, BAD_CAST ":/?_.#&;="); - if (escURI != NULL) { - /* Try parsing the escaped path */ - uri = xmlParseURI((const char *) escURI); - /* If successful, return the escaped string */ - if (uri != NULL) { - xmlFreeURI(uri); - return escURI; - } - xmlFree(escURI); - } - } - -path_processing: -/* For Windows implementations, replace backslashes with 'forward slashes' */ -#if defined(_WIN32) && !defined(__CYGWIN__) - /* - * Create a URI structure - */ - uri = xmlCreateURI(); - if (uri == NULL) { /* Guard against 'out of memory' */ - return(NULL); - } - - len = xmlStrlen(path); - if ((len > 2) && IS_WINDOWS_PATH(path)) { - /* make the scheme 'file' */ - uri->scheme = xmlStrdup(BAD_CAST "file"); - /* allocate space for leading '/' + path + string terminator */ - uri->path = xmlMallocAtomic(len + 2); - if (uri->path == NULL) { - xmlFreeURI(uri); /* Guard agains 'out of memory' */ - return(NULL); - } - /* Put in leading '/' plus path */ - uri->path[0] = '/'; - p = uri->path + 1; - strncpy(p, path, len + 1); - } else { - uri->path = xmlStrdup(path); - if (uri->path == NULL) { - xmlFreeURI(uri); - return(NULL); - } - p = uri->path; - } - /* Now change all occurences of '\' to '/' */ - while (*p != '\0') { - if (*p == '\\') - *p = '/'; - p++; - } - - if (uri->scheme == NULL) { - ret = xmlStrdup((const xmlChar *) uri->path); - } else { - ret = xmlSaveUri(uri); - } - - xmlFreeURI(uri); -#else - ret = xmlStrdup((const xmlChar *) path); -#endif - return(ret); -} - -/** - * xmlPathToURI: - * @path: the resource locator in a filesystem notation - * - * Constructs an URI expressing the existing path - * - * Returns a new URI, or a duplicate of the path parameter if the - * construction fails. The caller is responsible for freeing the memory - * occupied by the returned string. If there is insufficient memory available, - * or the argument is NULL, the function returns NULL. - */ -xmlChar * -xmlPathToURI(const xmlChar *path) -{ - xmlURIPtr uri; - xmlURI temp; - xmlChar *ret, *cal; - - if (path == NULL) - return(NULL); - - if ((uri = xmlParseURI((const char *) path)) != NULL) { - xmlFreeURI(uri); - return xmlStrdup(path); - } - cal = xmlCanonicPath(path); - if (cal == NULL) - return(NULL); -#if defined(_WIN32) && !defined(__CYGWIN__) - /* xmlCanonicPath can return an URI on Windows (is that the intended behaviour?) - If 'cal' is a valid URI allready then we are done here, as continuing would make - it invalid. */ - if ((uri = xmlParseURI((const char *) cal)) != NULL) { - xmlFreeURI(uri); - return cal; - } - /* 'cal' can contain a relative path with backslashes. If that is processed - by xmlSaveURI, they will be escaped and the external entity loader machinery - will fail. So convert them to slashes. Misuse 'ret' for walking. */ - ret = cal; - while (*ret != '\0') { - if (*ret == '\\') - *ret = '/'; - ret++; - } -#endif - memset(&temp, 0, sizeof(temp)); - temp.path = (char *) cal; - ret = xmlSaveUri(&temp); - xmlFree(cal); - return(ret); -} -#define bottom_uri -#include "elfgcchack.h" |