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Added a required parameter to get_by_xpath()

This commit is contained in:
Gergely Polonkai 2013-09-21 15:49:13 +02:00
parent 616fc79d11
commit 04b281c56b
1 changed files with 58 additions and 14 deletions
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72
src/ag-chart.c
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@ -206,8 +206,21 @@ ag_chart_get_city(AgChart *chart)
return g_strdup(chart->priv->city);
}
/**
* get_by_xpath:
* @xpath_context: an XPath context
* @uri: the name of the file currently being processed. Used in error messages only
* @xpath: an XPath expression
* @value_required: marks the value as required. Although the XML tags must be present, some values (like country or city name) may be omitted
* @type: the type of the variable to return
* @err: a GError
*
* Get the value of an XML tag via XPath.
*
* Returns: (transfer container): a GVariant with the requested value
*/
static GVariant *
get_by_xpath(xmlXPathContextPtr xpath_context, const gchar *uri, const gchar *xpath, XmlConvertType type, GError **err)
get_by_xpath(xmlXPathContextPtr xpath_context, const gchar *uri, const gchar *xpath, gboolean value_required, XmlConvertType type, GError **err)
{
xmlXPathObjectPtr xpathObj;
const gchar *text;
@ -238,6 +251,37 @@ get_by_xpath(xmlXPathContextPtr xpath_context, const gchar *uri, const gchar *xp
return NULL;
}
if (xpathObj->nodesetval->nodeNr == 0) {
if (value_required) {
g_debug("Too many '%s' nodes", xpath);
g_set_error(err, AG_CHART_ERROR, AG_CHART_ERROR_CORRUPT_FILE, "File '%s' doesn't look like a valid saved chart.", uri);
xmlXPathFreeObject(xpathObj);
return NULL;
} else {
GVariant *ret = NULL;
switch (type) {
case XML_CONVERT_STRING:
ret = g_variant_new("ms", NULL);
break;
case XML_CONVERT_DOUBLE:
ret = g_variant_new("md", FALSE, 0);
break;
case XML_CONVERT_INT:
ret = g_variant_new("mi", FALSE, 0);
break;
}
return ret;
}
}
text = (const gchar *)xpathObj->nodesetval->nodeTab[0]->content;
switch (type) {
@ -327,55 +371,55 @@ ag_chart_load_from_file(GFile *file, GError **err)
return NULL;
}
if ((chart_name = get_by_xpath(xpath_context, uri, "/chartinfo/data/name/text()", XML_CONVERT_STRING, err)) == NULL) {
if ((chart_name = get_by_xpath(xpath_context, uri, "/chartinfo/data/name/text()", TRUE, XML_CONVERT_STRING, err)) == NULL) {
found_error = TRUE;
}
if ((country = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/country/text()", XML_CONVERT_STRING, err)) == NULL) {
if ((country = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/country/text()", FALSE, XML_CONVERT_STRING, err)) == NULL) {
found_error = TRUE;
}
if ((city = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/city/text()", XML_CONVERT_STRING, err)) == NULL) {
if ((city = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/city/text()", FALSE, XML_CONVERT_STRING, err)) == NULL) {
found_error = TRUE;
}
if ((longitude = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/longitude/text()", XML_CONVERT_DOUBLE, err)) == NULL) {
if ((longitude = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/longitude/text()", TRUE, XML_CONVERT_DOUBLE, err)) == NULL) {
found_error = TRUE;
}
if ((latitude = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/latitude/text()", XML_CONVERT_DOUBLE, err)) == NULL) {
if ((latitude = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/latitude/text()", TRUE, XML_CONVERT_DOUBLE, err)) == NULL) {
found_error = TRUE;
}
if ((altitude = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/altitude/text()", XML_CONVERT_DOUBLE, err)) == NULL) {
if ((altitude = get_by_xpath(xpath_context, uri, "/chartinfo/data/place/altitude/text()", TRUE, XML_CONVERT_DOUBLE, err)) == NULL) {
found_error = TRUE;
}
if ((year = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/year/text()", XML_CONVERT_INT, err)) == NULL) {
if ((year = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/year/text()", TRUE, XML_CONVERT_INT, err)) == NULL) {
found_error = TRUE;
}
if ((month = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/month/text()", XML_CONVERT_INT, err)) == NULL) {
if ((month = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/month/text()", TRUE, XML_CONVERT_INT, err)) == NULL) {
found_error = TRUE;
}
if ((day = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/day/text()", XML_CONVERT_INT, err)) == NULL) {
if ((day = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/day/text()", TRUE, XML_CONVERT_INT, err)) == NULL) {
found_error = TRUE;
}
if ((hour = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/hour/text()", XML_CONVERT_INT, err)) == NULL) {
if ((hour = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/hour/text()", TRUE, XML_CONVERT_INT, err)) == NULL) {
found_error = TRUE;
}
if ((minute = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/minute/text()", XML_CONVERT_INT, err)) == NULL) {
if ((minute = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/minute/text()", TRUE, XML_CONVERT_INT, err)) == NULL) {
found_error = TRUE;
}
if ((second = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/second/text()", XML_CONVERT_INT, err)) == NULL) {
if ((second = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/second/text()", TRUE, XML_CONVERT_INT, err)) == NULL) {
found_error = TRUE;
}
if ((timezone = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/timezone/text()", XML_CONVERT_DOUBLE, err)) == NULL) {
if ((timezone = get_by_xpath(xpath_context, uri, "/chartinfo/data/time/timezone/text()", TRUE, XML_CONVERT_DOUBLE, err)) == NULL) {
found_error = TRUE;
}