webengine/osswebengine/WebCore/platform/symbian/Libxml2/Libxml2_error.c
changeset 0 dd21522fd290
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/platform/symbian/Libxml2/Libxml2_error.c	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,994 @@
+/*
+ * error.c: module displaying/handling XML parser errors
+ *
+ * See Copyright for the status of this software.
+ *
+ * Daniel Veillard <daniel@veillard.com>
+ */
+
+#define IN_LIBXML
+#include "XmlEnglibxml.h"
+
+#include <string.h>
+#include <stdarg.h>
+//#include "Libxml2_parser.h"
+//#include "Libxml2_xmlerror.h"
+//#include "Libxml2_xmlmemory.h"
+#include "Libxml2_globals.h"
+
+void xmlGenericErrorDefaultFunc (void *ctx ATTRIBUTE_UNUSED,
+                 const char *msg,
+                 ...);
+
+
+#define XML_GET_VAR_STR(msg, str) {         \
+    int       size;                         \
+    int       chars;                        \
+    char      *larger;                      \
+    va_list   ap;                           \
+                                            \
+    str = (char *) xmlMalloc(150);          \
+    if (str != NULL) {                      \
+                                            \
+    size = 150;                             \
+                                            \
+    while (1) {                             \
+    va_start(ap, msg);                      \
+    chars = vsnprintf(str, size, msg, ap);  \
+    va_end(ap);                             \
+    if ((chars > -1) && (chars < size))     \
+        break;                              \
+    if (chars > -1)                         \
+        size += chars + 1;                  \
+    else                                    \
+        size += 100;                        \
+    if ((larger = (char *) xmlRealloc(str, size)) == NULL) {\
+        break;                              \
+    }                                       \
+    str = larger;                           \
+    }}                                  \
+}
+
+
+/************************************************************************
+ *                                                                      *
+ *          Handling of out of context errors                           *
+ *                                                                      *
+ ************************************************************************/
+
+/**
+ * xmlGenericErrorDefaultFunc:
+ * @ctx:  an error context
+ * @msg:  the message to display/transmit
+ * @...:  extra parameters for the message display
+ *
+ * Default handler for out of context error messages.
+ */
+void
+xmlGenericErrorDefaultFunc(void *ctx ATTRIBUTE_UNUSED, const char *msg, ...) {
+#ifdef XMLENGINE_DISABLE_STDOUT
+    // TODO: LOGGING: do logging here
+    return;
+#else
+    va_list args;
+
+    if (xmlGenericErrorContext == NULL)
+    xmlGenericErrorContext = (void *) stderr;
+
+    va_start(args, msg);
+    vfprintf((FILE *)xmlGenericErrorContext, msg, args);
+    va_end(args);
+    if(ctx) return;
+#endif
+}
+
+/**
+ * initGenericErrorDefaultFunc:
+ * @handler:  the handler
+ *
+ * Set or reset (if NULL) the default handler for generic errors
+ * to the builtin error function.
+ */
+void
+initGenericErrorDefaultFunc(xmlGenericErrorFunc * handler)
+{
+    if (handler == NULL)
+        xmlGenericError = xmlGenericErrorDefaultFunc;
+    else
+        xmlGenericError = (*handler);
+}
+
+/**
+ * xmlSetGenericErrorFunc:
+ * @ctx:  the new error handling context
+ * @handler:  the new handler function
+ *
+ * Function to reset the handler and the error context for out of
+ * context error messages.
+ * This simply means that @handler will be called for subsequent
+ * error messages while not parsing nor validating. And @ctx will
+ * be passed as first argument to @handler
+ * One can simply force messages to be emitted to another FILE * than
+ * stderr by setting @ctx to this file handle and @handler to NULL.
+ */
+void
+xmlSetGenericErrorFunc(void *ctx, xmlGenericErrorFunc handler) {
+    xmlGenericErrorContext = ctx;
+    if (handler != NULL)
+    xmlGenericError = handler;
+    else
+    xmlGenericError = xmlGenericErrorDefaultFunc;
+}
+
+/**
+ * xmlSetStructuredErrorFunc:
+ * @ctx:  the new error handling context
+ * @handler:  the new handler function
+ *
+ * Function to reset the handler and the error context for out of
+ * context structured error messages.
+ * This simply means that @handler will be called for subsequent
+ * error messages while not parsing nor validating. And @ctx will
+ * be passed as first argument to @handler
+ */
+void
+xmlSetStructuredErrorFunc(void *ctx, xmlStructuredErrorFunc handler) {
+    xmlGenericErrorContext = ctx;
+    xmlStructuredError = handler;
+}
+
+/************************************************************************
+ *                                  *
+ *          Handling of parsing errors          *
+ *                                  *
+ ************************************************************************/
+
+/**
+ * xmlParserPrintFileInfo:
+ * @input:  an xmlParserInputPtr input
+ *
+ * Displays the associated file and line informations for the current input
+ */
+
+void
+xmlParserPrintFileInfo(xmlParserInputPtr input) {
+    if (input != NULL) {
+    if (input->filename)
+        xmlGenericError(xmlGenericErrorContext,
+            "%s:%d: ", input->filename,
+            input->line);
+    else
+        xmlGenericError(xmlGenericErrorContext,
+            "Entity: line %d: ", input->line);
+    }
+}
+
+/**
+ * xmlParserPrintFileContext:
+ * @input:  an xmlParserInputPtr input
+ *
+ * Displays current context within the input content for error tracking
+ */
+
+static void
+xmlParserPrintFileContextInternal(xmlParserInputPtr input ,
+        xmlGenericErrorFunc channel, void *data ) {
+    const xmlChar *cur, *base;
+    unsigned int n, col;    /* GCC warns if signed, because compared with sizeof() */
+    xmlChar  content[81]; /* space for 80 chars + line terminator */
+    xmlChar *ctnt;
+
+    if (input == NULL) return;
+    cur = input->cur;
+    base = input->base;
+    /* skip backwards over any end-of-lines */
+    while ((cur > base) && ((*(cur) == '\n') || (*(cur) == '\r'))) {
+    cur--;
+    }
+    n = 0;
+    /* search backwards for beginning-of-line (to max buff size) */
+    while ((n++ < (sizeof(content)-1)) && (cur > base) &&
+           (*(cur) != '\n') && (*(cur) != '\r'))
+        cur--;
+    if ((*(cur) == '\n') || (*(cur) == '\r')) cur++;
+    /* calculate the error position in terms of the current position */
+    col = input->cur - cur;
+    /* search forward for end-of-line (to max buff size) */
+    n = 0;
+    ctnt = content;
+    /* copy selected text to our buffer */
+    while ((*cur != 0) && (*(cur) != '\n') &&
+           (*(cur) != '\r') && (n < sizeof(content)-1)) {
+        *ctnt++ = *cur++;
+    n++;
+    }
+    *ctnt = 0;
+    /* print out the selected text */
+    channel(data ,"%s\n", content);
+    /* create blank line with problem pointer */
+    n = 0;
+    ctnt = content;
+    /* (leave buffer space for pointer + line terminator) */
+    while ((n<col) && (n++ < sizeof(content)-2) && (*ctnt != 0)) {
+    if (*(ctnt) != '\t')
+        *(ctnt) = ' ';
+    ctnt++;
+    }
+    *ctnt++ = '^';
+    *ctnt = 0;
+    channel(data ,"%s\n", content);
+}
+
+/**
+ * xmlParserPrintFileContext:
+ * @input:  an xmlParserInputPtr input
+ *
+ * Displays current context within the input content for error tracking
+ */
+void
+xmlParserPrintFileContext(xmlParserInputPtr input) {
+   xmlParserPrintFileContextInternal(input, xmlGenericError,
+                                     xmlGenericErrorContext);
+}
+
+//TODO: xmlReportError is required for debug/non-Symbian releases only
+/**
+ * xmlReportError:
+ * @err: the error
+ * @ctx: the parser context or NULL
+ * @str: the formatted error message
+ *
+ * Report an erro with its context, replace the 4 old error/warning
+ * routines.
+ */
+static void
+xmlReportError(xmlErrorPtr err, xmlParserCtxtPtr ctxt, const char *str,
+               xmlGenericErrorFunc channel, void *data)
+{
+    char *file = NULL;
+    int line = 0;
+    int code = -1;
+    int domain;
+    const xmlChar *name = NULL;
+    xmlNodePtr node;
+    xmlErrorLevel level;
+    xmlParserInputPtr input = NULL;
+    xmlParserInputPtr cur = NULL;
+
+    if (err == NULL)
+        return;
+
+    if (channel == NULL) { // TODO: LOGGING: setup Symbian specific logger callback here
+        channel = xmlGenericError;
+        data = xmlGenericErrorContext;
+    }
+    file = err->file;
+#ifdef LIBXML_ENABLE_NODE_LINEINFO
+    line = err->line;
+#endif
+    code = err->code;
+    domain = err->domain;
+    level = err->level;
+    node = (xmlNodePtr)err->node;
+
+    if (code == XML_ERR_OK)
+        return;
+
+    if ((node != NULL) && (node->type == XML_ELEMENT_NODE))
+        name = node->name;
+
+    /*
+     * Maintain the compatibility with the legacy error handling
+     */
+    if (ctxt != NULL) {
+        input = ctxt->input;
+        if ((input != NULL) && (input->filename == NULL) &&
+            (ctxt->inputNr > 1)) {
+            cur = input;
+            input = ctxt->inputTab[ctxt->inputNr - 2];
+        }
+        if (input != NULL) {
+            if (input->filename)
+                channel(data, "%s:%d: ", input->filename, input->line);
+            else if ((line != 0) && (domain == XML_FROM_PARSER))
+                channel(data, "Entity: line %d: ", input->line);
+        }
+    } else {
+        if (file != NULL)
+            channel(data, "%s:%d: ", file, line);
+        else if ((line != 0) && (domain == XML_FROM_PARSER))
+            channel(data, "Entity: line %d: ", line);
+    }
+    if (name != NULL) {
+        channel(data, "element %s: ", name);
+    }
+    if (code == XML_ERR_OK)
+        return;
+    switch (domain) {
+        case XML_FROM_PARSER:
+            channel(data, "parser ");
+            break;
+        case XML_FROM_NAMESPACE:
+            channel(data, "namespace ");
+            break;
+        case XML_FROM_DTD:
+        case XML_FROM_VALID:
+            channel(data, "validity ");
+            break;
+        case XML_FROM_HTML:
+            channel(data, "HTML parser ");
+            break;
+        case XML_FROM_MEMORY:
+            channel(data, "memory ");
+            break;
+        case XML_FROM_OUTPUT:
+            channel(data, "output ");
+            break;
+        case XML_FROM_IO:
+            channel(data, "I/O ");
+            break;
+        case XML_FROM_XINCLUDE:
+            channel(data, "XInclude ");
+            break;
+        case XML_FROM_XPATH:
+            channel(data, "XPath ");
+            break;
+        case XML_FROM_XPOINTER:
+            channel(data, "parser ");
+            break;
+        case XML_FROM_REGEXP:
+            channel(data, "regexp ");
+            break;
+        case XML_FROM_SCHEMASV:
+            channel(data, "Schemas validity ");
+            break;
+        case XML_FROM_SCHEMASP:
+            channel(data, "Schemas parser ");
+            break;
+        case XML_FROM_RELAXNGP:
+            channel(data, "Relax-NG parser ");
+            break;
+        case XML_FROM_RELAXNGV:
+            channel(data, "Relax-NG validity ");
+            break;
+        case XML_FROM_CATALOG:
+            channel(data, "Catalog ");
+            break;
+        case XML_FROM_C14N:
+            channel(data, "C14N ");
+            break;
+        case XML_FROM_XSLT:
+            channel(data, "XSLT ");
+            break;
+        default:
+            break;
+    }
+    if (code == XML_ERR_OK)
+        return;
+    switch (level) {
+        case XML_ERR_NONE:
+            channel(data, ": ");
+            break;
+        case XML_ERR_WARNING:
+            channel(data, "warning : ");
+            break;
+        case XML_ERR_ERROR:
+            channel(data, "error : ");
+            break;
+        case XML_ERR_FATAL:
+            channel(data, "error : ");
+            break;
+    }
+    if (code == XML_ERR_OK)
+        return;
+    if (str != NULL) {
+        int len;
+        len = xmlStrlen((const xmlChar *)str);
+        if ((len > 0) && (str[len - 1] != '\n'))
+            channel(data, "%s\n", str);
+        else
+            channel(data, "%s", str);
+    } else {
+        channel(data, "%s\n", "out of memory error");
+    }
+    if (code == XML_ERR_OK)
+        return;
+
+    if (ctxt != NULL) {
+        xmlParserPrintFileContextInternal(input, channel, data);
+        if (cur != NULL) {
+            if (cur->filename)
+                channel(data, "%s:%d: \n", cur->filename, cur->line);
+            else if ((line != 0) && (domain == XML_FROM_PARSER))
+                channel(data, "Entity: line %d: \n", cur->line);
+            xmlParserPrintFileContextInternal(cur, channel, data);
+        }
+    }
+    if ((domain == XML_FROM_XPATH) &&
+        (err->str1 != NULL) &&
+        (err->int1 < 100) &&
+        (err->int1 < xmlStrlen((const xmlChar *)err->str1)))
+    {
+        // TODO: buffers on the stack - maybe dangerous on Symbian!
+        xmlChar buf[150];
+        int i;
+
+        channel(data, "%s\n", err->str1);
+        for (i=0;i < err->int1;i++)
+             buf[i] = ' ';
+        buf[i++] = '^';
+        buf[i] = 0;
+        channel(data, "%s\n", buf);
+    }
+}
+
+/**
+ * __xmlRaiseError:
+ * @schannel: the structured callback channel
+ * @channel: the old callback channel
+ * @data: the callback data
+ * @ctx: the parser context or NULL
+ * @ctx: the parser context or NULL
+ * @domain: the domain for the error
+ * @code: the code for the error
+ * @level: the xmlErrorLevel for the error
+ * @file: the file source of the error (or NULL)
+ * @line: the line of the error or 0 if N/A
+ * @str1: extra string info
+ * @str2: extra string info
+ * @str3: extra string info
+ * @int1: extra int info
+ * @int2: extra int info
+ * @msg:  the message to display/transmit
+ * @...:  extra parameters for the message display
+ *
+ * Update the appropriate global or contextual error structure,
+ * then forward the error message down the parser or generic
+ * error callback handler
+ */
+void
+__xmlRaiseError(xmlStructuredErrorFunc schannel,
+              xmlGenericErrorFunc channel, void *data, void *ctx,
+              void *nod, int domain, int code, xmlErrorLevel level,
+              const char *file, int line, const char *str1,
+              const char *str2, const char *str3, int int1, int int2,
+          const char *msg, ...)
+{
+    xmlParserCtxtPtr ctxt = NULL;
+    xmlNodePtr node = (xmlNodePtr) nod;
+    char *str = NULL;
+    xmlParserInputPtr input = NULL;
+    xmlErrorPtr to = &xmlLastError;
+    xmlChar *base = NULL;
+
+// XMLENGINE: BEGIN NEW CODE
+    if(domain == XML_FROM_XPATH)
+        return; // no output, just return NULL
+// XMLENGINE: END NEW CODE
+
+    if ((xmlGetWarningsDefaultValue == 0) && (level == XML_ERR_WARNING))
+        return;
+    if ((domain == XML_FROM_PARSER) ||
+        (domain == XML_FROM_HTML) ||   // TODO: Remove HTML-related code
+        (domain == XML_FROM_DTD) ||
+        (domain == XML_FROM_NAMESPACE) ||
+        (domain == XML_FROM_IO))
+    {
+        ctxt = (xmlParserCtxtPtr) ctx;
+        if ((schannel == NULL) && (ctxt != NULL) &&
+            (ctxt->sax != NULL)&& (ctxt->sax->initialized == XML_SAX2_MAGIC))
+               schannel = ctxt->sax->serror;
+    }
+    if (schannel == NULL)
+        schannel = xmlStructuredError;
+    if ((domain == XML_FROM_VALID) &&
+        ((channel == xmlParserValidityError) || (channel == xmlParserValidityWarning)))
+    {
+        ctxt = (xmlParserCtxtPtr) ctx;
+        if ((schannel == NULL) &&
+            (ctxt != NULL) &&
+            (ctxt->sax != NULL) &&
+            (ctxt->sax->initialized == XML_SAX2_MAGIC))
+        {
+            schannel = ctxt->sax->serror;
+        }
+    }
+    if (code == XML_ERR_OK)
+        return;
+
+    /*
+     * Formatting the message
+     */
+#ifndef XMLENGINE_EXCLUDE_EMBED_MSG
+    if (msg == NULL) {
+#else
+    if (msg == NULL || msg == __embedded_errtxt_replacement) {
+#endif
+        str = (char *) xmlStrdup(BAD_CAST "No error message provided");
+    } else {
+        //XML_GET_VAR_STR(msg, str); //this causes panic when OOM
+        str = (char *) xmlStrdup(BAD_CAST msg);
+    }
+
+    /*
+     * specific processing if a parser context is provided
+     */
+    if (ctxt != NULL) {
+        if (file == NULL) {
+            input = ctxt->input;
+            if ((input != NULL) &&
+                (input->filename == NULL) &&
+                (ctxt->inputNr > 1))
+            {
+                input = ctxt->inputTab[ctxt->inputNr - 2];
+            }
+            if (input != NULL) {
+                file = input->filename;
+                line = input->line;
+            }
+        }
+        to = &ctxt->lastError;
+    } else if ((node != NULL) && (file == NULL)) {
+        int i;
+
+        if ((node->doc != NULL) && (node->doc->URL != NULL))
+            base = xmlStrdup(node->doc->URL);
+        for (i = 0;
+             ((i < 10) && (node != NULL) && (node->type != XML_ELEMENT_NODE));
+             i++)
+             node = node->parent;
+        if ((base == NULL) && (node != NULL) &&
+            (node->doc != NULL) && (node->doc->URL != NULL))
+        {
+            base = xmlStrdup(node->doc->URL);
+        }
+#ifdef LIBXML_ENABLE_NODE_LINEINFO
+    if ((node != NULL) && (node->type == XML_ELEMENT_NODE))
+        line = node->line;
+#endif
+    }
+    /*
+     * Save the information about the error
+     */
+    xmlResetError(to);
+    to->domain = domain;
+    to->code = code;
+    to->message = str;
+    to->level = level;
+    if (file != NULL)
+        to->file = (char *) xmlStrdup((const xmlChar *) file);
+    else if (base != NULL) {
+        to->file = (char *) base;
+        file = (char *) base;
+    }
+
+#ifdef LIBXML_ENABLE_NODE_LINEINFO
+    to->line = line;
+#endif
+
+    if (str1)
+        to->str1 = (char *) xmlStrdup((const xmlChar *) str1);
+    if (str2)
+        to->str2 = (char *) xmlStrdup((const xmlChar *) str2);
+    if (str3)
+        to->str3 = (char *) xmlStrdup((const xmlChar *) str3);
+    to->int1 = int1;
+    to->int2 = int2;
+    to->node = node;
+    to->ctxt = ctx;
+
+    if (to != &xmlLastError) { xmlResetError(&xmlLastError);
+        xmlCopyError(to,&xmlLastError); }
+
+    /*
+     * Find the callback channel.
+     */
+    if ((ctxt != NULL) &&
+        (channel == NULL) &&
+        (xmlStructuredError == NULL))
+    {
+        if (level == XML_ERR_WARNING)
+            channel = ctxt->sax->warning;
+        else
+            channel = ctxt->sax->error;
+        data = ctxt->userData;
+    } else {
+    if (channel == NULL) {
+        if (xmlStructuredError != NULL)
+            schannel = xmlStructuredError;
+        else
+            channel = xmlGenericError;
+        data = xmlGenericErrorContext;
+        }
+    }
+    if (schannel != NULL) {
+        schannel(data, to);
+        return;
+    }
+    if (channel == NULL)
+        return;
+
+    if ((channel == xmlParserError) ||
+        (channel == xmlParserWarning) ||
+        (channel == xmlParserValidityError) ||
+        (channel == xmlParserValidityWarning))
+    {
+        xmlReportError(to, ctxt, str, NULL, NULL);
+    }
+    else
+    {
+    if ((channel == (xmlGenericErrorFunc) fprintf) ||
+        (channel == xmlGenericErrorDefaultFunc))
+        xmlReportError(to, ctxt, str, channel, data);
+    else
+        channel(data, "%s", str);
+    }
+}
+
+/**
+ * __xmlSimpleError:
+ * @domain: where the error comes from
+ * @code: the error code
+ * @node: the context node
+ * @extra:  extra informations
+ *
+ * Handle an out of memory condition
+ */
+void
+__xmlSimpleError(int domain, int code, xmlNodePtr node,
+                 const char *msg, const char *extra)
+{
+    // TODO: OPTIMIZE: Combine all 3 calls into one
+    if (code == XML_ERR_NO_MEMORY) {
+        if (extra)
+            __xmlRaiseError(NULL, NULL, NULL, NULL, node, domain,
+                    XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
+                    NULL, NULL, 0, 0,
+                    EMBED_ERRTXT("Memory allocation failed : %s\n"), extra);
+        else
+            __xmlRaiseError(NULL, NULL, NULL, NULL, node, domain,
+                    XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
+                    NULL, NULL, 0, 0, EMBED_ERRTXT("Memory allocation failed\n"));
+    } else {
+        __xmlRaiseError(NULL, NULL, NULL, NULL, node, domain,
+                code, XML_ERR_ERROR, NULL, 0, extra,
+                NULL, NULL, 0, 0, msg, extra);
+    }
+}
+
+/**
+ * xmlParserError:
+ * @ctx:  an XML parser context
+ * @msg:  the message to display/transmit
+ * @...:  extra parameters for the message display
+ *
+ * Display and format an error messages, gives file, line, position and
+ * extra parameters.
+ */
+void
+xmlParserError(void *ctx, const char *msg, ...)
+{
+    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
+    xmlParserInputPtr input = NULL;
+    xmlParserInputPtr cur = NULL;
+    char * str;
+
+    if (ctxt != NULL) {
+    input = ctxt->input;
+    if ((input != NULL) && (input->filename == NULL) &&
+        (ctxt->inputNr > 1)) {
+        cur = input;
+        input = ctxt->inputTab[ctxt->inputNr - 2];
+    }
+    xmlParserPrintFileInfo(input);
+    }
+
+    xmlGenericError(xmlGenericErrorContext, "error: ");
+    XML_GET_VAR_STR(msg, str);
+    xmlGenericError(xmlGenericErrorContext, "%s", str);
+    if (str != NULL)
+    xmlFree(str);
+
+    if (ctxt != NULL) {
+    xmlParserPrintFileContext(input);
+    if (cur != NULL) {
+        xmlParserPrintFileInfo(cur);
+        xmlGenericError(xmlGenericErrorContext, "\n");
+        xmlParserPrintFileContext(cur);
+    }
+    }
+}
+
+/**
+ * xmlParserWarning:
+ * @ctx:  an XML parser context
+ * @msg:  the message to display/transmit
+ * @...:  extra parameters for the message display
+ *
+ * Display and format a warning messages, gives file, line, position and
+ * extra parameters.
+ */
+void
+xmlParserWarning(void *ctx, const char *msg, ...)
+{
+    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
+    xmlParserInputPtr input = NULL;
+    xmlParserInputPtr cur = NULL;
+    char * str;
+
+    if (ctxt != NULL) {
+    input = ctxt->input;
+    if ((input != NULL) && (input->filename == NULL) &&
+        (ctxt->inputNr > 1)) {
+        cur = input;
+        input = ctxt->inputTab[ctxt->inputNr - 2];
+    }
+    xmlParserPrintFileInfo(input);
+    }
+
+    xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("warning: "));
+    XML_GET_VAR_STR(msg, str);
+    xmlGenericError(xmlGenericErrorContext, "%s", str);
+    if (str != NULL)
+    xmlFree(str);
+
+    if (ctxt != NULL) {
+    xmlParserPrintFileContext(input);
+    if (cur != NULL) {
+        xmlParserPrintFileInfo(cur);
+        xmlGenericError(xmlGenericErrorContext, "\n");
+        xmlParserPrintFileContext(cur);
+    }
+    }
+}
+
+/************************************************************************
+ *                                  *
+ *          Handling of validation errors           *
+ *                                  *
+ ************************************************************************/
+
+/**
+ * xmlParserValidityError:
+ * @ctx:  an XML parser context
+ * @msg:  the message to display/transmit
+ * @...:  extra parameters for the message display
+ *
+ * Display and format an validity error messages, gives file,
+ * line, position and extra parameters.
+ */
+void
+xmlParserValidityError(void *ctx, const char *msg, ...)
+{
+    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
+    xmlParserInputPtr input = NULL;
+    char * str;
+    int len = xmlStrlen((const xmlChar *) msg);
+
+    if ((len > 1) && (msg[len - 2] != ':')) {
+    if (ctxt != NULL) {
+        input = ctxt->input;
+        if ((input->filename == NULL) && (ctxt->inputNr > 1))
+        input = ctxt->inputTab[ctxt->inputNr - 2];
+
+        if (had_info == 0) {
+        xmlParserPrintFileInfo(input);
+        }
+    }
+    xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("validity error: "));
+    had_info = 0;
+    } else {
+    had_info = 1;
+    }
+
+    XML_GET_VAR_STR(msg, str);
+    xmlGenericError(xmlGenericErrorContext, "%s", str);
+    if (str != NULL)
+    xmlFree(str);
+
+    if ((ctxt != NULL) && (input != NULL)) {
+    xmlParserPrintFileContext(input);
+    }
+}
+
+/**
+ * xmlParserValidityWarning:
+ * @ctx:  an XML parser context
+ * @msg:  the message to display/transmit
+ * @...:  extra parameters for the message display
+ *
+ * Display and format a validity warning messages, gives file, line,
+ * position and extra parameters.
+ */
+void
+xmlParserValidityWarning(void *ctx, const char *msg, ...)
+{
+    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
+    xmlParserInputPtr input = NULL;
+    char * str;
+    int len = xmlStrlen((const xmlChar *) msg);
+
+    if ((ctxt != NULL) && (len != 0) && (msg[len - 1] != ':')) {
+    input = ctxt->input;
+    if ((input->filename == NULL) && (ctxt->inputNr > 1))
+        input = ctxt->inputTab[ctxt->inputNr - 2];
+
+    xmlParserPrintFileInfo(input);
+    }
+
+    xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("validity warning: "));
+    XML_GET_VAR_STR(msg, str);
+    xmlGenericError(xmlGenericErrorContext, "%s", str);
+    if (str != NULL)
+    xmlFree(str);
+
+    if (ctxt != NULL) {
+    xmlParserPrintFileContext(input);
+    }
+}
+
+
+/************************************************************************
+ *                                  *
+ *          Extended Error Handling             *
+ *                                  *
+ ************************************************************************/
+
+/**
+ * xmlGetLastError:
+ *
+ * Get the last global error registered. This is per thread if compiled
+ * with thread support.
+ *
+ * Returns NULL if no error occured or a pointer to the error
+ */
+xmlErrorPtr
+xmlGetLastError(void)
+{
+    if (xmlLastError.code == XML_ERR_OK)
+        return (NULL);
+    return (&xmlLastError);
+}
+
+/**
+ * xmlResetError:
+ * @err: pointer to the error.
+ *
+ * Cleanup the error.
+ *
+ * OOM: never
+ */
+void
+xmlResetError(xmlErrorPtr err)
+{
+    if (err == NULL)
+        return;
+    if (err->code == XML_ERR_OK)
+        return;
+    if (err->message != NULL)
+        xmlFree(err->message);
+    if (err->file != NULL)
+        xmlFree(err->file);
+    if (err->str1 != NULL)
+        xmlFree(err->str1);
+    if (err->str2 != NULL)
+        xmlFree(err->str2);
+    if (err->str3 != NULL)
+        xmlFree(err->str3);
+    memset(err, 0, sizeof(xmlError));
+    err->code = XML_ERR_OK;
+}
+
+/**
+ * xmlResetLastError:
+ *
+ * Cleanup the last global error registered. For parsing error
+ * this does not change the well-formedness result.
+ *
+ * OOM: never
+ */
+void
+xmlResetLastError(void)
+{
+    if (xmlLastError.code == XML_ERR_OK)
+        return;
+    xmlResetError(&xmlLastError);
+}
+
+/**
+ * xmlCtxtGetLastError:
+ * @ctx:  an XML parser context
+ *
+ * Get the last parsing error registered.
+ *
+ * Returns NULL if no error occured or a pointer to the error
+ */
+xmlErrorPtr
+xmlCtxtGetLastError(void *ctx)
+{
+    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
+
+    if (ctxt == NULL)
+        return (NULL);
+    if (ctxt->lastError.code == XML_ERR_OK)
+        return (NULL);
+    return (&ctxt->lastError);
+}
+
+/**
+ * xmlCtxtResetLastError:
+ * @ctx:  an XML parser context
+ *
+ * Cleanup the last global error registered. For parsing error
+ * this does not change the well-formedness result.
+ */
+void
+xmlCtxtResetLastError(void *ctx)
+{
+    xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
+
+    if (ctxt == NULL)
+        return;
+    if (ctxt->lastError.code == XML_ERR_OK)
+        return;
+    xmlResetError(&ctxt->lastError);
+}
+
+/**
+ * xmlCopyError:
+ * @from:  a source error
+ * @to:  a target error
+ *
+ * Save the original error to the new place.
+ *
+ * Returns 0 in case of success and -1 in case of error.
+ */
+int
+xmlCopyError(xmlErrorPtr from, xmlErrorPtr to) {
+    if ((from == NULL) || (to == NULL))
+        return(-1);
+    if (to->message != NULL)
+        xmlFree(to->message);
+    if (to->file != NULL)
+        xmlFree(to->file);
+    if (to->str1 != NULL)
+        xmlFree(to->str1);
+    if (to->str2 != NULL)
+        xmlFree(to->str2);
+    if (to->str3 != NULL)
+        xmlFree(to->str3);
+    to->domain = from->domain;
+    to->code = from->code;
+    to->level = from->level;
+#ifdef LIBXML_ENABLE_NODE_LINEINFO
+    to->line = from->line;
+#endif
+    to->node = from->node;
+    to->int1 = from->int1;
+    to->int2 = from->int2;
+    to->node = from->node;
+    to->ctxt = from->ctxt;
+    if (from->message != NULL)
+        to->message = (char *) xmlStrdup((xmlChar *) from->message);
+    else
+        to->message = NULL;
+    if (from->file != NULL)
+        to->file = (char *) xmlStrdup((xmlChar *) from->file);
+    else
+        to->file = NULL;
+    if (from->str1 != NULL)
+        to->str1 = (char *) xmlStrdup((xmlChar *) from->str1);
+    else
+        to->str1 = NULL;
+    if (from->str2 != NULL)
+        to->str2 = (char *) xmlStrdup((xmlChar *) from->str2);
+    else
+        to->str2 = NULL;
+    if (from->str3 != NULL)
+        to->str3 = (char *) xmlStrdup((xmlChar *) from->str3);
+    else
+        to->str3 = NULL;
+    return(0);
+}
+
+