uri.c
上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:40k
- /**
- * uri.c: set of generic URI related routines
- *
- * Reference: RFC 2396
- *
- * See Copyright for the status of this software.
- *
- * Daniel.Veillard@w3.org
- */
- #ifdef WIN32
- #define INCLUDE_WINSOCK
- #include "win32config.h"
- #else
- #include "config.h"
- #endif
- #include <stdio.h>
- #include <string.h>
- #include <libxml/xmlmemory.h>
- #include <libxml/uri.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_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'))
- /**
- * 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))
- /**
- * he(x) = 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))
- /**
- * escaped = "%" hex hex
- */
- #define IS_ESCAPED(p) ((*(p) == '%') && (IS_HEX((p)[1])) &&
- (IS_HEX((p)[2])))
- /**
- * uric_no_slash = unreserved | escaped | ";" | "?" | ":" | "@" |
- * "&" | "=" | "+" | "$" | ","
- */
- #define IS_URIC_NO_SLASH(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) ||
- ((*(p) == ';')) || ((*(p) == '?')) || ((*(p) == ':')) ||
- ((*(p) == '@')) || ((*(p) == '&')) || ((*(p) == '=')) ||
- ((*(p) == '+')) || ((*(p) == '$')) || ((*(p) == ',')))
- /**
- * pchar = unreserved | escaped | ":" | "@" | "&" | "=" | "+" | "$" | ","
- */
- #define IS_PCHAR(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) ||
- ((*(p) == ':')) || ((*(p) == '@')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
- ((*(p) == ',')))
- /**
- * rel_segment = 1*( unreserved | escaped |
- * ";" | "@" | "&" | "=" | "+" | "$" | "," )
- */
- #define IS_SEGMENT(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) ||
- ((*(p) == ';')) || ((*(p) == '@')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
- ((*(p) == ',')))
- /**
- * scheme = alpha *( alpha | digit | "+" | "-" | "." )
- */
- #define IS_SCHEME(x) ((IS_ALPHA(x)) || (IS_DIGIT(x)) ||
- ((x) == '+') || ((x) == '-') || ((x) == '.'))
- /**
- * reg_name = 1*( unreserved | escaped | "$" | "," |
- * ";" | ":" | "@" | "&" | "=" | "+" )
- */
- #define IS_REG_NAME(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) ||
- ((*(p) == '$')) || ((*(p) == ',')) || ((*(p) == ';')) ||
- ((*(p) == ':')) || ((*(p) == '@')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')))
- /**
- * userinfo = *( unreserved | escaped | ";" | ":" | "&" | "=" |
- * "+" | "$" | "," )
- */
- #define IS_USERINFO(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) ||
- ((*(p) == ';')) || ((*(p) == ':')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
- ((*(p) == ',')))
- /**
- * uric = reserved | unreserved | escaped
- */
- #define IS_URIC(p) ((IS_UNRESERVED(*(p))) || (IS_ESCAPED(p)) ||
- (IS_RESERVED(*(p))))
- /**
- * 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 | "$" | "," |
- * ";" | ":" | "@" | "&" | "=" | "+" )
- *
- * path = [ abs_path | opaque_part ]
- */
- /**
- * xmlCreateURI:
- *
- * Simply creates an empty xmlURI
- *
- * Returns the new structure or NULL in case of error
- */
- xmlURIPtr
- xmlCreateURI(void) {
- xmlURIPtr ret;
- ret = (xmlURIPtr) xmlMalloc(sizeof(xmlURI));
- if (ret == NULL) {
- fprintf(stderr, "xmlCreateURI: out of memoryn");
- return(NULL);
- }
- memset(ret, 0, sizeof(xmlURI));
- return(ret);
- }
- /**
- * xmlSaveUri:
- * @uri: pointer to an xmlURI
- *
- * Save the URI as an escaped string
- *
- * Returns a new string (to be deallocated by caller)
- */
- xmlChar *
- xmlSaveUri(xmlURIPtr uri) {
- xmlChar *ret = NULL;
- const char *p;
- int len;
- int max;
- if (uri == NULL) return(NULL);
- max = 80;
- ret = xmlMalloc((max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- len = 0;
- if (uri->scheme != NULL) {
- p = uri->scheme;
- while (*p != 0) {
- if (len >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = *p++;
- }
- if (len >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = ':';
- }
- if (uri->opaque != NULL) {
- p = uri->opaque;
- while (*p != 0) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- if ((IS_UNRESERVED(*(p))) ||
- ((*(p) == ';')) || ((*(p) == '?')) || ((*(p) == ':')) ||
- ((*(p) == '@')) || ((*(p) == '&')) || ((*(p) == '=')) ||
- ((*(p) == '+')) || ((*(p) == '$')) || ((*(p) == ',')))
- ret[len++] = *p++;
- else {
- int val = *p++;
- ret[len++] = '%';
- switch (val / 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val / 0x10);
- }
- switch (val % 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val % 0x10);
- }
- }
- }
- if (len >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = 0;
- } else {
- if (uri->server != NULL) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = '/';
- ret[len++] = '/';
- if (uri->user != NULL) {
- p = uri->user;
- while (*p != 0) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- if ((IS_UNRESERVED(*(p))) ||
- ((*(p) == ';')) || ((*(p) == ':')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
- ((*(p) == ',')))
- ret[len++] = *p++;
- else {
- int val = *p++;
- ret[len++] = '%';
- switch (val / 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val / 0x10);
- }
- switch (val % 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val % 0x10);
- }
- }
- }
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = '@';
- }
- p = uri->server;
- while (*p != 0) {
- if (len >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = *p++;
- }
- if (uri->port > 0) {
- if (len + 10 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- len += sprintf((char *) &ret[len], ":%d", uri->port);
- }
- } else if (uri->authority != NULL) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = '/';
- ret[len++] = '/';
- p = uri->authority;
- while (*p != 0) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- if ((IS_UNRESERVED(*(p))) ||
- ((*(p) == '$')) || ((*(p) == ',')) || ((*(p) == ';')) ||
- ((*(p) == ':')) || ((*(p) == '@')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')))
- ret[len++] = *p++;
- else {
- int val = *p++;
- ret[len++] = '%';
- switch (val / 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val / 0x10);
- }
- switch (val % 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val % 0x10);
- }
- }
- }
- }
- if (uri->path != NULL) {
- p = uri->path;
- while (*p != 0) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- if ((IS_UNRESERVED(*(p))) || ((*(p) == '/')) ||
- ((*(p) == ';')) || ((*(p) == '@')) || ((*(p) == '&')) ||
- ((*(p) == '=')) || ((*(p) == '+')) || ((*(p) == '$')) ||
- ((*(p) == ',')))
- ret[len++] = *p++;
- else {
- int val = *p++;
- ret[len++] = '%';
- switch (val / 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val / 0x10);
- }
- switch (val % 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val % 0x10);
- }
- }
- }
- }
- if (uri->query != NULL) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = '?';
- p = uri->query;
- while (*p != 0) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- if ((IS_UNRESERVED(*(p))) || (IS_RESERVED(*(p))))
- ret[len++] = *p++;
- else {
- int val = *p++;
- ret[len++] = '%';
- switch (val / 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val / 0x10);
- }
- switch (val % 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val % 0x10);
- }
- }
- }
- }
- if (uri->fragment != NULL) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = '#';
- p = uri->fragment;
- while (*p != 0) {
- if (len + 3 >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- if ((IS_UNRESERVED(*(p))) || (IS_RESERVED(*(p))))
- ret[len++] = *p++;
- else {
- int val = *p++;
- ret[len++] = '%';
- switch (val / 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val / 0x10);
- }
- switch (val % 0x10) {
- case 0xF: ret[len++] = 'F'; break;
- case 0xE: ret[len++] = 'E'; break;
- case 0xD: ret[len++] = 'D'; break;
- case 0xC: ret[len++] = 'C'; break;
- case 0xB: ret[len++] = 'B'; break;
- case 0xA: ret[len++] = 'A'; break;
- default: ret[len++] = '0' + (val % 0x10);
- }
- }
- }
- }
- if (len >= max) {
- max *= 2;
- ret = xmlRealloc(ret, (max + 1) * sizeof(xmlChar));
- if (ret == NULL) {
- fprintf(stderr, "xmlSaveUri: out of memoryn");
- return(NULL);
- }
- }
- ret[len++] = 0;
- }
- return(ret);
- }
- /**
- * xmlPrintURI:
- * @stream: a FILE* for the output
- * @uri: pointer to an xmlURI
- *
- * Prints the URI in the stream @steam.
- */
- void
- xmlPrintURI(FILE *stream, xmlURIPtr uri) {
- xmlChar *out;
- out = xmlSaveUri(uri);
- if (out != NULL) {
- fprintf(stream, "%s", out);
- xmlFree(out);
- }
- }
- /**
- * xmlCleanURI:
- * @uri: pointer to an xmlURI
- *
- * Make sure the xmlURI struct is free of content
- */
- 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;
- }
- /**
- * 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);
- memset(uri, -1, sizeof(xmlURI));
- xmlFree(uri);
- }
- /**
- * xmlURIUnescapeString:
- * @str: the string to unescape
- * @len: the lenght in bytes to unescape (or <= 0 to indicate full string)
- * @target: optionnal destination buffer
- *
- * Unescaping routine, does not do validity checks !
- * Output is direct unsigned char translation of %XX values (no encoding)
- *
- * Returns an copy of the string, but unescaped
- */
- 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 *) xmlMalloc(len + 1);
- if (ret == NULL) {
- fprintf(stderr, "xmlURIUnescapeString: out of memoryn");
- return(NULL);
- }
- } else
- ret = target;
- in = str;
- out = ret;
- while(len > 0) {
- if (*in == '%') {
- 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);
- }
- /**
- * xmlParseURIFragment:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an URI fragment string and fills in the appropriate fields
- * of the @uri structure.
- *
- * fragment = *uric
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIFragment(xmlURIPtr uri, const char **str) {
- const char *cur = *str;
- if (str == NULL) return(-1);
- while (IS_URIC(cur)) NEXT(cur);
- if (uri != NULL) {
- if (uri->fragment != NULL) xmlFree(uri->fragment);
- uri->fragment = xmlURIUnescapeString(*str, cur - *str, NULL);
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIQuery:
- * @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
- */
- int
- xmlParseURIQuery(xmlURIPtr uri, const char **str) {
- const char *cur = *str;
- if (str == NULL) return(-1);
- while (IS_URIC(cur)) NEXT(cur);
- if (uri != NULL) {
- if (uri->query != NULL) xmlFree(uri->query);
- uri->query = xmlURIUnescapeString(*str, cur - *str, NULL);
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIScheme:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an URI scheme
- *
- * scheme = alpha *( alpha | digit | "+" | "-" | "." )
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIScheme(xmlURIPtr uri, const char **str) {
- const char *cur;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- if (!IS_ALPHA(*cur))
- return(2);
- cur++;
- while (IS_SCHEME(*cur)) cur++;
- if (uri != NULL) {
- if (uri->scheme != NULL) xmlFree(uri->scheme);
- uri->scheme = xmlURIUnescapeString(*str, cur - *str, NULL); /* !!! strndup */
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIOpaquePart:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an URI opaque part
- *
- * opaque_part = uric_no_slash *uric
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIOpaquePart(xmlURIPtr uri, const char **str) {
- const char *cur;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- if (!IS_URIC_NO_SLASH(cur)) {
- return(3);
- }
- NEXT(cur);
- while (IS_URIC(cur)) NEXT(cur);
- if (uri != NULL) {
- if (uri->opaque != NULL) xmlFree(uri->opaque);
- uri->opaque = xmlURIUnescapeString(*str, cur - *str, NULL);
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIServer:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse a server subpart of an URI, it's a finer grain analysis
- * of the authority part.
- *
- * 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
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIServer(xmlURIPtr uri, const char **str) {
- const char *cur;
- const char *host, *tmp;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- /*
- * is there an userinfo ?
- */
- while (IS_USERINFO(cur)) NEXT(cur);
- if (*cur == '@') {
- if (uri != NULL) {
- if (uri->user != NULL) xmlFree(uri->user);
- uri->user = xmlURIUnescapeString(*str, cur - *str, NULL);
- }
- cur++;
- } else {
- if (uri != NULL) {
- if (uri->user != NULL) xmlFree(uri->user);
- uri->user = NULL;
- }
- cur = *str;
- }
- /*
- * host part of hostport can derive either an IPV4 address
- * or an unresolved name. Check the IP first, it easier to detect
- * errors if wrong one
- */
- host = cur;
- if (IS_DIGIT(*cur)) {
- while(IS_DIGIT(*cur)) cur++;
- if (*cur != '.')
- goto host_name;
- cur++;
- if (!IS_DIGIT(*cur))
- goto host_name;
- while(IS_DIGIT(*cur)) cur++;
- if (*cur != '.')
- goto host_name;
- cur++;
- if (!IS_DIGIT(*cur))
- goto host_name;
- while(IS_DIGIT(*cur)) cur++;
- if (*cur != '.')
- goto host_name;
- cur++;
- if (!IS_DIGIT(*cur))
- goto host_name;
- while(IS_DIGIT(*cur)) cur++;
- if (uri != NULL) {
- if (uri->authority != NULL) xmlFree(uri->authority);
- uri->authority = NULL;
- if (uri->server != NULL) xmlFree(uri->server);
- uri->server = xmlURIUnescapeString(host, cur - host, NULL);
- }
- goto host_done;
- }
- host_name:
- /*
- * the hostname production as-is is a parser nightmare.
- * simplify it to
- * hostname = *( domainlabel "." ) domainlabel [ "." ]
- * and just make sure the last label starts with a non numeric char.
- */
- if (!IS_ALPHANUM(*cur))
- return(6);
- while (IS_ALPHANUM(*cur)) {
- while ((IS_ALPHANUM(*cur)) || (*cur == '-')) cur++;
- if (*cur == '.')
- cur++;
- }
- tmp = cur;
- tmp--;
- while (IS_ALPHANUM(*tmp) && (*tmp != '.') && (tmp >= host)) tmp--;
- tmp++;
- if (!IS_ALPHA(*tmp))
- return(7);
- if (uri != NULL) {
- if (uri->authority != NULL) xmlFree(uri->authority);
- uri->authority = NULL;
- if (uri->server != NULL) xmlFree(uri->server);
- uri->server = xmlURIUnescapeString(host, cur - host, NULL);
- }
- host_done:
- /*
- * finish by checking for a port presence.
- */
- if (*cur == ':') {
- cur++;
- if (IS_DIGIT(*cur)) {
- if (uri != NULL)
- uri->port = 0;
- while (IS_DIGIT(*cur)) {
- if (uri != NULL)
- uri->port = uri->port * 10 + (*cur - '0');
- cur++;
- }
- }
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIRelSegment:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an URI relative segment
- *
- * rel_segment = 1*( unreserved | escaped | ";" | "@" | "&" | "=" |
- * "+" | "$" | "," )
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIRelSegment(xmlURIPtr uri, const char **str) {
- const char *cur;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- if (!IS_SEGMENT(cur)) {
- return(3);
- }
- NEXT(cur);
- while (IS_SEGMENT(cur)) NEXT(cur);
- if (uri != NULL) {
- if (uri->path != NULL) xmlFree(uri->path);
- uri->path = xmlURIUnescapeString(*str, cur - *str, NULL);
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIPathSegments:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- * @slash: should we add a leading slash
- *
- * Parse an URI set of path segments
- *
- * path_segments = segment *( "/" segment )
- * segment = *pchar *( ";" param )
- * param = *pchar
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIPathSegments(xmlURIPtr uri, const char **str, int slash) {
- const char *cur;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- do {
- while (IS_PCHAR(cur)) NEXT(cur);
- if (*cur == ';') {
- cur++;
- while (IS_PCHAR(cur)) NEXT(cur);
- }
- if (*cur != '/') break;
- cur++;
- } while (1);
- if (uri != NULL) {
- int len, len2 = 0;
- char *path;
- /*
- * Concat the set of path segments to the current path
- */
- len = cur - *str;
- if (slash)
- len++;
- if (uri->path != NULL) {
- len2 = strlen(uri->path);
- len += len2;
- }
- path = (char *) xmlMalloc(len + 1);
- if (path == NULL) {
- fprintf(stderr, "xmlParseURIPathSegments: out of memoryn");
- *str = cur;
- return(-1);
- }
- if (uri->path != NULL)
- memcpy(path, uri->path, len2);
- if (slash) {
- path[len2] = '/';
- len2++;
- }
- xmlURIUnescapeString(*str, cur - *str, &path[len2]);
- if (uri->path != NULL)
- xmlFree(uri->path);
- uri->path = path;
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIAuthority:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse the authority part of an URI.
- *
- * authority = server | reg_name
- * server = [ [ userinfo "@" ] hostport ]
- * reg_name = 1*( unreserved | escaped | "$" | "," | ";" | ":" |
- * "@" | "&" | "=" | "+" )
- *
- * Note : this is completely ambiguous since reg_name is allowed to
- * use the full set of chars in use by server:
- *
- * 3.2.1. Registry-based Naming Authority
- *
- * The structure of a registry-based naming authority is specific
- * to the URI scheme, but constrained to the allowed characters
- * for an authority component.
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIAuthority(xmlURIPtr uri, const char **str) {
- const char *cur;
- int ret;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- /*
- * try first to parse it as a server string.
- */
- ret = xmlParseURIServer(uri, str);
- if (ret == 0)
- return(0);
- /*
- * failed, fallback to reg_name
- */
- if (!IS_REG_NAME(cur)) {
- return(5);
- }
- NEXT(cur);
- while (IS_REG_NAME(cur)) NEXT(cur);
- if (uri != NULL) {
- if (uri->server != NULL) xmlFree(uri->server);
- uri->server = NULL;
- if (uri->user != NULL) xmlFree(uri->user);
- uri->user = NULL;
- if (uri->authority != NULL) xmlFree(uri->authority);
- uri->authority = xmlURIUnescapeString(*str, cur - *str, NULL);
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseURIHierPart:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an URI hirarchical part
- *
- * hier_part = ( net_path | abs_path ) [ "?" query ]
- * abs_path = "/" path_segments
- * net_path = "//" authority [ abs_path ]
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIHierPart(xmlURIPtr uri, const char **str) {
- int ret;
- const char *cur;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- if ((cur[0] == '/') && (cur[1] == '/')) {
- cur += 2;
- ret = xmlParseURIAuthority(uri, &cur);
- if (ret != 0)
- return(ret);
- if (cur[0] == '/') {
- cur++;
- ret = xmlParseURIPathSegments(uri, &cur, 1);
- }
- } else if (cur[0] == '/') {
- cur++;
- ret = xmlParseURIPathSegments(uri, &cur, 1);
- } else {
- return(4);
- }
- if (ret != 0)
- return(ret);
- if (*cur == '?') {
- cur++;
- ret = xmlParseURIQuery(uri, &cur);
- if (ret != 0)
- return(ret);
- }
- *str = cur;
- return(0);
- }
- /**
- * xmlParseAbsoluteURI:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an URI reference string and fills in the appropriate fields
- * of the @uri structure
- *
- * absoluteURI = scheme ":" ( hier_part | opaque_part )
- *
- * Returns 0 or the error code
- */
- int
- xmlParseAbsoluteURI(xmlURIPtr uri, const char **str) {
- int ret;
- if (str == NULL)
- return(-1);
-
- ret = xmlParseURIScheme(uri, str);
- if (ret != 0) return(ret);
- if (**str != ':')
- return(1);
- (*str)++;
- if (**str == '/')
- return(xmlParseURIHierPart(uri, str));
- return(xmlParseURIOpaquePart(uri, str));
- }
- /**
- * xmlParseRelativeURI:
- * @uri: pointer to an URI structure
- * @str: pointer to the string to analyze
- *
- * Parse an relative URI string and fills in the appropriate fields
- * of the @uri structure
- *
- * relativeURI = ( net_path | abs_path | rel_path ) [ "?" query ]
- * abs_path = "/" path_segments
- * net_path = "//" authority [ abs_path ]
- * rel_path = rel_segment [ abs_path ]
- *
- * Returns 0 or the error code
- */
- int
- xmlParseRelativeURI(xmlURIPtr uri, const char **str) {
- int ret = 0;
- const char *cur;
- if (str == NULL)
- return(-1);
-
- cur = *str;
- if ((cur[0] == '/') && (cur[1] == '/')) {
- cur += 2;
- ret = xmlParseURIAuthority(uri, &cur);
- if (ret != 0)
- return(ret);
- if (cur[0] == '/') {
- cur++;
- ret = xmlParseURIPathSegments(uri, &cur, 1);
- }
- } else if (cur[0] == '/') {
- cur++;
- ret = xmlParseURIPathSegments(uri, &cur, 1);
- } else {
- ret = xmlParseURIRelSegment(uri, &cur);
- if (ret != 0)
- return(ret);
- if (cur[0] == '/') {
- cur++;
- ret = xmlParseURIPathSegments(uri, &cur, 1);
- }
- }
- if (ret != 0)
- return(ret);
- if (*cur == '?') {
- cur++;
- ret = xmlParseURIQuery(uri, &cur);
- if (ret != 0)
- return(ret);
- }
- *str = cur;
- return(ret);
- }
- /**
- * xmlParseURIReference:
- * @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 = [ absoluteURI | relativeURI ] [ "#" fragment ]
- *
- * Returns 0 or the error code
- */
- int
- xmlParseURIReference(xmlURIPtr uri, const char *str) {
- int ret;
- const char *tmp = str;
- if (str == NULL)
- return(-1);
- xmlCleanURI(uri);
- /*
- * Try first to parse aboslute refs, then fallback to relative if
- * it fails.
- */
- ret = xmlParseAbsoluteURI(uri, &str);
- if (ret != 0) {
- xmlCleanURI(uri);
- str = tmp;
- ret = xmlParseRelativeURI(uri, &str);
- }
- if (ret != 0) {
- xmlCleanURI(uri);
- return(ret);
- }
- if (*str == '#') {
- str++;
- ret = xmlParseURIFragment(uri, &str);
- if (ret != 0) return(ret);
- }
- if (*str != 0) {
- xmlCleanURI(uri);
- return(1);
- }
- return(0);
- }
- /**
- * xmlNormalizeURIPath:
- * @path: pointer to the path string
- *
- * applies the 5 normalization steps to a path string
- * Normalization occurs directly on the string, no new allocation is done
- *
- * Returns 0 or an error code
- */
- int
- xmlNormalizeURIPath(char *path) {
- int cur, out;
- if (path == NULL)
- return(-1);
- cur = 0;
- out = 0;
- while ((path[cur] != 0) && (path[cur] != '/')) cur++;
- if (path[cur] == 0)
- return(0);
- /* we are positionned at the beginning of the first segment */
- cur++;
- out = cur;
- /*
- * Analyze each segment in sequence.
- */
- while (path[cur] != 0) {
- /*
- * c) All occurrences of "./", where "." is a complete path segment,
- * are removed from the buffer string.
- */
- if ((path[cur] == '.') && (path[cur + 1] == '/')) {
- cur += 2;
- continue;
- }
- /*
- * d) If the buffer string ends with "." as a complete path segment,
- * that "." is removed.
- */
- if ((path[cur] == '.') && (path[cur + 1] == 0)) {
- path[out] = 0;
- break;
- }
- /* read the segment */
- while ((path[cur] != 0) && (path[cur] != '/')) {
- path[out++] = path[cur++];
- }
- path[out++] = path[cur];
- if (path[cur] != 0) {
- cur++;
- }
- }
- cur = 0;
- out = 0;
- while ((path[cur] != 0) && (path[cur] != '/')) cur++;
- if (path[cur] == 0)
- return(0);
- /* we are positionned at the beginning of the first segment */
- cur++;
- out = cur;
- /*
- * Analyze each segment in sequence.
- */
- while (path[cur] != 0) {
- /*
- * 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.
- */
- if ((cur > 1) && (out > 1) &&
- (path[cur] == '/') && (path[cur + 1] == '.') &&
- (path[cur + 2] == '.') && (path[cur + 3] == '/') &&
- ((path[out] != '.') || (path[out - 1] != '.') ||
- (path[out - 2] != '/'))) {
- cur += 3;
- out --;
- while ((out > 0) && (path[out] != '/')) { out --; }
- path[out] = 0;
- continue;
- }
- /*
- * f) If the buffer string ends with "<segment>/..", where <segment>
- * is a complete path segment not equal to "..", that
- * "<segment>/.." is removed.
- */
- if ((path[cur] == '/') && (path[cur + 1] == '.') &&
- (path[cur + 2] == '.') && (path[cur + 3] == 0) &&
- ((path[out] != '.') || (path[out - 1] != '.') ||
- (path[out - 2] != '/'))) {
- cur += 4;
- out --;
- while ((out > 0) && (path[out - 1] != '/')) { out --; }
- path[out] = 0;
- continue;
- }
-
- path[out++] = path[cur++]; /* / or 0 */
- }
- path[out] = 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.
- */
- cur = 0;
- while ((path[cur] == '/') && (path[cur + 1] == '.') &&
- (path[cur + 2] == '.'))
- cur += 3;
- if (cur != 0) {
- out = 0;
- while (path[cur] != 0) path[out++] = path[cur++];
- path[out] = 0;
- }
- return(0);
- }
- /**
- * 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, index, 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.
- */
- ref = xmlCreateURI();
- if (ref == NULL)
- goto done;
- ret = xmlParseURIReference(ref, (const char *) URI);
- if (ret != 0)
- goto done;
- bas = xmlCreateURI();
- if (bas == NULL)
- goto done;
- ret = xmlParseURIReference(bas, (const char *) base);
- if (ret != 0)
- 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.
- */
- res = xmlCreateURI();
- if (res == NULL)
- goto done;
- if ((ref->scheme == NULL) && (ref->path == NULL) &&
- ((ref->authority == NULL) && (ref->server == NULL)) &&
- (ref->query == NULL)) {
- if (ref->fragment == NULL)
- goto done;
- res->fragment = xmlMemStrdup(ref->fragment);
- val = xmlSaveUri(res);
- goto done;
- }
- /*
- * 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;
- }
- res->scheme = xmlMemStrdup(bas->scheme);
- /*
- * 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);
- if (ref->query != NULL)
- res->query = xmlMemStrdup(ref->query);
- if (ref->fragment != NULL)
- res->fragment = xmlMemStrdup(ref->fragment);
- 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);
- if (ref->query != NULL)
- res->query = xmlMemStrdup(ref->query);
- if (ref->fragment != NULL)
- res->fragment = xmlMemStrdup(ref->fragment);
- 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 *) xmlMalloc(len);
- if (res->path == NULL) {
- fprintf(stderr, "xmlBuildURI: out of memoryn");
- 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) {
- index = 0;
- while (ref->path[index] != 0) {
- res->path[out++] = ref->path[index++];
- }
- }
- 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 (base != NULL)
- xmlFreeURI(bas);
- if (res != NULL)
- xmlFreeURI(res);
- return(val);
- }