diff options
Diffstat (limited to 'xmlIO.c')
| -rw-r--r-- | xmlIO.c | 126 |
1 files changed, 126 insertions, 0 deletions
@@ -35,6 +35,9 @@ #ifdef HAVE_ZLIB_H #include <zlib.h> #endif +#ifdef HAVE_LZMA_H +#include <lzma.h> +#endif #if defined(WIN32) || defined(_WIN32) #include <windows.h> @@ -1306,6 +1309,125 @@ xmlGzfileClose (void * context) { } #endif /* HAVE_ZLIB_H */ +#ifdef HAVE_LZMA_H +/************************************************************************ + * * + * I/O for compressed file accesses * + * * + ************************************************************************/ +#include "xzlib.h" +/** + * xmlXzfileMatch: + * @filename: the URI for matching + * + * input from compressed file test + * + * Returns 1 if matches, 0 otherwise + */ +static int +xmlXzfileMatch (const char *filename ATTRIBUTE_UNUSED) { + return(1); +} + +/** + * xmlXzFileOpen_real: + * @filename: the URI for matching + * + * input from compressed file open + * if @filename is " " then the standard input is used + * + * Returns an I/O context or NULL in case of error + */ +static void * +xmlXzfileOpen_real (const char *filename) { + const char *path = NULL; + xzFile fd; + + if (!strcmp(filename, "-")) { + fd = __libxml2_xzdopen(dup(0), "rb"); + return((void *) fd); + } + + if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) { + path = &filename[16]; + } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) { + path = &filename[7]; + } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:/", 6)) { + /* lots of generators seems to lazy to read RFC 1738 */ + path = &filename[5]; + } else + path = filename; + + if (path == NULL) + return(NULL); + if (!xmlCheckFilename(path)) + return(NULL); + + fd = __libxml2_xzopen(path, "rb"); + return((void *) fd); +} + +/** + * xmlXzfileOpen: + * @filename: the URI for matching + * + * Wrapper around xmlXzfileOpen_real that try it with an unescaped + * version of @filename, if this fails fallback to @filename + * + * Returns a handler or NULL in case or failure + */ +static void * +xmlXzfileOpen (const char *filename) { + char *unescaped; + void *retval; + + retval = xmlXzfileOpen_real(filename); + if (retval == NULL) { + unescaped = xmlURIUnescapeString(filename, 0, NULL); + if (unescaped != NULL) { + retval = xmlXzfileOpen_real(unescaped); + } + xmlFree(unescaped); + } + + return retval; +} + +/** + * xmlXzfileRead: + * @context: the I/O context + * @buffer: where to drop data + * @len: number of bytes to write + * + * Read @len bytes to @buffer from the compressed I/O channel. + * + * Returns the number of bytes written + */ +static int +xmlXzfileRead (void * context, char * buffer, int len) { + int ret; + + ret = __libxml2_xzread((xzFile) context, &buffer[0], len); + if (ret < 0) xmlIOErr(0, "xzread()"); + return(ret); +} + +/** + * xmlXzfileClose: + * @context: the I/O context + * + * Close a compressed I/O channel + */ +static int +xmlXzfileClose (void * context) { + int ret; + + ret = (__libxml2_xzclose((xzFile) context) == LZMA_OK ) ? 0 : -1; + if (ret < 0) xmlIOErr(0, "xzclose()"); + return(ret); +} +#endif /* HAVE_LZMA_H */ + #ifdef LIBXML_HTTP_ENABLED /************************************************************************ * * @@ -2181,6 +2303,10 @@ xmlRegisterDefaultInputCallbacks(void) { xmlRegisterInputCallbacks(xmlGzfileMatch, xmlGzfileOpen, xmlGzfileRead, xmlGzfileClose); #endif /* HAVE_ZLIB_H */ +#ifdef HAVE_LZMA_H + xmlRegisterInputCallbacks(xmlXzfileMatch, xmlXzfileOpen, + xmlXzfileRead, xmlXzfileClose); +#endif /* HAVE_ZLIB_H */ #ifdef LIBXML_HTTP_ENABLED xmlRegisterInputCallbacks(xmlIOHTTPMatch, xmlIOHTTPOpen, |