xmlparserwarning_chdl.c

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#include <libxml/xmlerror.h>
#include <ch.h>

#define XML_GET_VAR_STR_VA(msg, str, ap_c) {                    \
    int       size;                                             \
    int       chars;                                            \
    char      *larger;                                          \
                                                                \
    str = (char *) xmlMalloc(150);                              \
    if (str != NULL) {                                          \
      size = 150;                                               \
      while (1) {                                               \
        chars = vsnprintf(str, size, msg, ap_c);                \
        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;                                           \
      }                                                         \
    }                                                           \
}

/**
 * xmlParserVWarning:
 * @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
xmlParserVWarning(void *ctx, const char *msg, va_list ap_c)
{
    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, "warning: ");
    XML_GET_VAR_STR_VA(msg, str, ap_c);
    xmlGenericError(xmlGenericErrorContext, "%s", str);
    if (str != NULL)
        xmlFree(str);

    if (ctxt != NULL) {
        xmlParserPrintFileContext(input);
        if (cur != NULL) {
            xmlParserPrintFileInfo(cur);
            xmlGenericError(xmlGenericErrorContext, "\n");
            xmlParserPrintFileContext(cur);
        }
    }
}

EXPORTCH void xmlParserWarning_chdl(void *varg) {
    ChInterp_t interp;
    va_list ap;
    void *ctx;
    char *msg;
    va_list ap_ch, ap_c;
    void *memhandle;

    Ch_VaStart(interp, ap, varg);
    ctx = Ch_VaArg(interp, ap, void *);
    msg = Ch_VaArg(interp, ap, char *);
    ap_ch = Ch_VaArg(interp, ap, va_list);
    ap_c = Ch_VaVarArgsCreate(interp, ap_ch, &memhandle);
    xmlParserVWarning(ctx, msg, ap_c);
    Ch_VaVarArgsDelete(interp, memhandle);
    Ch_VaEnd(interp, ap);
}