xmlwriter.c.svn-base

这是一个用于解析xml文件的类库。使用这个类库

    int count;
    int sum;
    xmlLinkPtr lk;
    xmlTextWriterStackEntry *p;

    if (writer == NULL)
        return -1;

    lk = xmlListFront(writer->nodes);
    if (lk == 0)
        return -1;

    p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
    if (p == 0)
        return -1;

    sum = 0;
    switch (p->state) {
        case XML_TEXTWRITER_ATTRIBUTE:
            count = xmlTextWriterEndAttribute(writer);
            if (count < 0)
                return -1;
            sum += count;
            /* fallthrough */
        case XML_TEXTWRITER_NAME:
            if (writer->indent) /* next element needs indent */
                writer->doindent = 1;
            count = xmlOutputBufferWriteString(writer->out, "/>");
            if (count < 0)
                return -1;
            sum += count;
            break;
        case XML_TEXTWRITER_TEXT:
            if ((writer->indent) && (writer->doindent)) {
                count = xmlTextWriterWriteIndent(writer);
                sum += count;
                writer->doindent = 1;
            } else
                writer->doindent = 1;
            count = xmlOutputBufferWriteString(writer->out, "</");
            if (count < 0)
                return -1;
            sum += count;
            count = xmlOutputBufferWriteString(writer->out,
                                               (const char *) p->name);
            if (count < 0)
                return -1;
            sum += count;
            count = xmlOutputBufferWriteString(writer->out, ">");
            if (count < 0)
                return -1;
            sum += count;
            break;
        default:
            return -1;
    }

    if (writer->indent) {
        count = xmlOutputBufferWriteString(writer->out, "\n");
        sum += count;
    }

    xmlListPopFront(writer->nodes);
    return sum;
}

/**
 * xmlTextWriterFullEndElement:
 * @writer:  the xmlTextWriterPtr
 *
 * End the current xml element. Writes an end tag even if the element is empty
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterFullEndElement(xmlTextWriterPtr writer)
{
    int count;
    int sum;
    xmlLinkPtr lk;
    xmlTextWriterStackEntry *p;

    if (writer == NULL)
        return -1;

    lk = xmlListFront(writer->nodes);
    if (lk == 0)
        return -1;

    p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
    if (p == 0)
        return -1;

    sum = 0;
    switch (p->state) {
        case XML_TEXTWRITER_ATTRIBUTE:
            count = xmlTextWriterEndAttribute(writer);
            if (count < 0)
                return -1;
            sum += count;
            /* fallthrough */
        case XML_TEXTWRITER_NAME:
            count = xmlOutputBufferWriteString(writer->out, ">");
            if (count < 0)
                return -1;
            sum += count;
            /* fallthrough */
        case XML_TEXTWRITER_TEXT:
            count = xmlOutputBufferWriteString(writer->out, "</");
            if (count < 0)
                return -1;
            sum += count;
            count = xmlOutputBufferWriteString(writer->out,
                                               (const char *) p->name);
            if (count < 0)
                return -1;
            sum += count;
            count = xmlOutputBufferWriteString(writer->out, ">");
            if (count < 0)
                return -1;
            sum += count;
            break;
        default:
            return -1;
    }

    xmlListPopFront(writer->nodes);
    return sum;
}

/**
 * xmlTextWriterWriteFormatRaw:
 * @writer:  the xmlTextWriterPtr
 * @format:  format string (see printf)
 * @...:  extra parameters for the format
 *
 * Write a formatted raw xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteFormatRaw(xmlTextWriterPtr writer, const char *format,
                            ...)
{
    int rc;
    va_list ap;

    va_start(ap, format);

    rc = xmlTextWriterWriteVFormatRaw(writer, format, ap);

    va_end(ap);
    return rc;
}

/**
 * xmlTextWriterWriteVFormatRaw:
 * @writer:  the xmlTextWriterPtr
 * @format:  format string (see printf)
 * @argptr:  pointer to the first member of the variable argument list.
 *
 * Write a formatted raw xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteVFormatRaw(xmlTextWriterPtr writer, const char *format,
                             va_list argptr)
{
    int rc;
    xmlChar *buf;

    if (writer == NULL)
        return -1;

    buf = xmlTextWriterVSprintf(format, argptr);
    if (buf == 0)
        return 0;

    rc = xmlTextWriterWriteRaw(writer, buf);

    xmlFree(buf);
    return rc;
}

/**
 * xmlTextWriterWriteRawLen:
 * @writer:  the xmlTextWriterPtr
 * @content:  text string
 * @len:  length of the text string
 *
 * Write an xml text.
 * TODO: what about entities and special chars??
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteRawLen(xmlTextWriterPtr writer, const xmlChar * content,
                         int len)
{
    int count;
    int sum;
    xmlLinkPtr lk;
    xmlTextWriterStackEntry *p;

    if (writer == NULL) {
        xmlGenericError(xmlGenericErrorContext,
                        "xmlTextWriterWriteRawLen : invalid writer!\n");
        return -1;
    }

    if ((content == NULL) && (len > 0)) {
        xmlGenericError(xmlGenericErrorContext,
                        "xmlTextWriterWriteRawLen : invalid content!\n");
        return -1;
    }

    sum = 0;
    lk = xmlListFront(writer->nodes);
    if (lk != 0) {
        p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
        count = xmlTextWriterHandleStateDependencies(writer, p);
        if (count < 0)
            return -1;
        sum += count;
    }

    if (writer->indent)
        writer->doindent = 0;

    if (content != NULL) {
        count =
            xmlOutputBufferWrite(writer->out, len, (const char *) content);
        if (count < 0)
            return -1;
        sum += count;
    }

    return sum;
}

/**
 * xmlTextWriterWriteRaw:
 * @writer:  the xmlTextWriterPtr
 * @content:  text string
 *
 * Write a raw xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteRaw(xmlTextWriterPtr writer, const xmlChar * content)
{
    return xmlTextWriterWriteRawLen(writer, content, xmlStrlen(content));
}

/**
 * xmlTextWriterWriteFormatString:
 * @writer:  the xmlTextWriterPtr
 * @format:  format string (see printf)
 * @...:  extra parameters for the format
 *
 * Write a formatted xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteFormatString(xmlTextWriterPtr writer, const char *format,
                               ...)
{
    int rc;
    va_list ap;

    va_start(ap, format);

    rc = xmlTextWriterWriteVFormatString(writer, format, ap);

    va_end(ap);
    return rc;
}

/**
 * xmlTextWriterWriteVFormatString:
 * @writer:  the xmlTextWriterPtr
 * @format:  format string (see printf)
 * @argptr:  pointer to the first member of the variable argument list.
 *
 * Write a formatted xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteVFormatString(xmlTextWriterPtr writer,
                                const char *format, va_list argptr)
{
    int rc;
    xmlChar *buf;

    if (writer == NULL)
        return -1;

    buf = xmlTextWriterVSprintf(format, argptr);
    if (buf == 0)
        return 0;

    rc = xmlTextWriterWriteString(writer, buf);

    xmlFree(buf);
    return rc;
}

/**
 * xmlTextWriterWriteString:
 * @writer:  the xmlTextWriterPtr
 * @content:  text string
 *
 * Write an xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteString(xmlTextWriterPtr writer, const xmlChar * content)
{
    int count;
    int sum;
    xmlLinkPtr lk;
    xmlTextWriterStackEntry *p;
    xmlChar *buf;

    if (writer == NULL)
        return -1;

    sum = 0;
    buf = (xmlChar *) content;
    lk = xmlListFront(writer->nodes);
    if (lk != 0) {
        p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
        if (p != 0) {
            switch (p->state) {
                case XML_TEXTWRITER_NAME:
                case XML_TEXTWRITER_TEXT:
#if 0
                    buf = NULL;
		    xmlOutputBufferWriteEscape(writer->out, content, NULL);
#endif
                    buf = xmlEncodeSpecialChars(NULL, content);
                    break;
                case XML_TEXTWRITER_ATTRIBUTE:
                    buf = NULL;
                    xmlAttrSerializeTxtContent(writer->out->buffer, NULL,
                                               NULL, content);
                    break;
		default:
		    break;
            }
        }
    }

    if (buf != NULL) {
        count = xmlTextWriterWriteRaw(writer, buf);
        if (count < 0)
            return -1;
        sum += count;

        if (buf != content)     /* buf was allocated by us, so free it */
            xmlFree(buf);
    }

    return sum;
}

/**
 * xmlOutputBufferWriteBase64:
 * @out: the xmlOutputBufferPtr
 * @data:   binary data
 * @len:  the number of bytes to encode
 *
 * Write base64 encoded data to an xmlOutputBuffer.
 * Adapted from John Walker's base64.c (http://www.fourmilab.ch/).
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
static int
xmlOutputBufferWriteBase64(xmlOutputBufferPtr out, int len,
                           const unsigned char *data)
{
    static unsigned char dtable[64] =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    int i;
    int linelen;
    int count;
    int sum;

    linelen = 0;
    sum = 0;

    i = 0;
    while (1) {
        unsigned char igroup[3];
        unsigned char ogroup[4];
        int c;
        int n;

        igroup[0] = igroup[1] = igroup[2] = 0;
        for (n = 0; n < 3 && i < len; n++, i++) {
            c = data[i];
            igroup[n] = (unsigned char) c;
        }

        if (n > 0) {
            ogroup[0] = dtable[igroup[0] >> 2];
            ogroup[1] = dtable[((igroup[0] & 3) << 4) | (igroup[1] >> 4)];
            ogroup[2] =
                dtable[((igroup[1] & 0xF) << 2) | (igroup[2] >> 6)];
            ogroup[3] = dtable[igroup[2] & 0x3F];

            if (n < 3) {
                ogroup[3] = '=';
                if (n < 2) {
                    ogroup[2] = '=';
                }
            }

            if (linelen >= B64LINELEN) {
                count = xmlOutputBufferWrite(out, 2, B64CRLF);
                if (count == -1)
                    return -1;
                sum += count;
                linelen = 0;
            }
            count = xmlOutputBufferWrite(out, 4, (const char *) ogroup);
            if (count == -1)
                return -1;
            sum += count;

            linelen += 4;
        }

        if (i >= len)
            break;
    }

    return sum;
}

/**
 * xmlTextWriterWriteBase64:
 * @writer: the xmlTextWriterPtr
 * @data:   binary data
 * @start:  the position within the data of the first byte to encode
 * @len:  the number of bytes to encode
 *
 * Write an base64 encoded xml text.
 *
 * Returns the bytes written (may be 0 because of buffering) or -1 in case of error
 */
int
xmlTextWriterWriteBase64(xmlTextWriterPtr writer, const char *data,
                         int start, int len)
{
    int count;
    int sum;
    xmlLinkPtr lk;
    xmlTextWriterStackEntry *p;

    if (writer == NULL)
        return -1;

    sum = 0;
    lk = xmlListFront(writer->nodes);
    if (lk != 0) {
        p = (xmlTextWriterStackEntry *) xmlLinkGetData(lk);
        if (p != 0) {
            count = xmlTextWriterHandleStateDependencies(writer, p);
            if (count < 0)
                return -1;
            sum += count;
        }
    }

    if (writer->indent)
        writer->doindent = 0;

    count =
        xmlOutputBufferWriteBase64(writer->out, len,
                                   (unsigned char *) data + start);
    if (count < 0)
        return -1;
    sum += count;

    return sum;
}

/**
 * xmlOutputBufferWriteBinHex: