#include <stdlib.h>

#include <string.h>

#include <glib.h>

#include "testcase.h"

#include "warningsparser.h"

/*

 * A GMarkupParser for the contents of a WARNINGS tag.

 */

typedef struct {

    Testcase *testcase;

    TestcaseWarning *warning;

    TestcaseLocation *location;

    enum {

	WARNINGS_INIT,

	WARNINGS_IN_EXPECTED,

	WARNINGS_IN_WARNING,

	WARNINGS_IN_AT,

	WARNINGS_IN_TEXT,

	WARNINGS_DONE,

    } state;

} WarningsBaton;

static void warnings_parser_start_element(GMarkupParseContext *context,

  const char *element_name,const char **attribute_names,

  const char **attribute_values,void *user_data,GError **error)

{

    int i;

    guint64 tmp;

    char *endp;

    WarningsBaton *baton=user_data;

    switch(baton->state)

    {

	case WARNINGS_INIT:

	    if (strcmp(element_name,"expected"))

		g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_UNKNOWN_ELEMENT,

		  "Unknown root element: '%s'",element_name);

	    else if (attribute_names[0])

		g_set_error(error,G_MARKUP_ERROR,

		  G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,

		  "Unknown attribute on element 'expected': '%s'",

		  attribute_names[0]);

	    else

		baton->state=WARNINGS_IN_EXPECTED;

	    break;

	case WARNINGS_IN_EXPECTED:

	    baton->warning=g_new0(TestcaseWarning,1);

	    if (!strcmp(element_name,"error"))

		baton->warning->is_real=TRUE;

	    else if (!strcmp(element_name,"false-positive"))

		baton->warning->xfail=TRUE;

	    else if (!strcmp(element_name,"false-negative"))

		baton->warning->is_real=baton->warning->xfail=TRUE;

	    else

	    {

		g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_UNKNOWN_ELEMENT,

		  "Unknown element in 'expected': '%s'",element_name);

		g_free(baton->warning);

		baton->warning=NULL;

		return;

	    }

	    if (attribute_names[0])

	    {

		g_set_error(error,G_MARKUP_ERROR,

		  G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,

		  "Unknown attribute on element '%s': '%s'",element_name,

		  attribute_names[0]);

		g_free(baton->warning);

		baton->warning=NULL;

		return;

	    }

	    else

		baton->state=WARNINGS_IN_WARNING;

	    break;

	case WARNINGS_IN_WARNING:

	    if (!strcmp(element_name,"at"))

	    {

		baton->location=g_new0(TestcaseLocation,1);

		for(i=0;attribute_names[i];i++)

		{

		    if (!strcmp(attribute_names[i],"line"))

		    {

			tmp=g_ascii_strtoull(attribute_values[i],&endp,0);

			if (tmp<1 || tmp>G_MAXUINT || tmp==G_MAXUINT64)

			{

			    g_set_error(error,G_MARKUP_ERROR,

			      G_MARKUP_ERROR_INVALID_CONTENT,"Invalid value "

			      "for attribute 'line' on element '%s': '%s'",

			      element_name,attribute_values[i]);

			    return;

			}

			baton->location->line=(guint)tmp;

		    }

		    else if (!strcmp(attribute_names[i],"column"))

		    {

			tmp=g_ascii_strtoull(attribute_values[i],&endp,0);

			if (tmp<1 || tmp>G_MAXUINT || tmp==G_MAXUINT64)

			{

			    g_set_error(error,G_MARKUP_ERROR,

			      G_MARKUP_ERROR_INVALID_CONTENT,"Invalid value "

			      "for attribute 'column' on element '%s': '%s'",

			      element_name,attribute_values[i]);

			    return;

			}

			baton->location->column=(guint)tmp;

		    }

		    else

		    {

			g_set_error(error,G_MARKUP_ERROR,

			  G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,

			  "Unknown attribute on element '%s': '%s'",

			  element_name,attribute_names[i]);

			return;

		    }

		}

		if (!baton->location->line)

		{

		    g_set_error(error,G_MARKUP_ERROR,

		      G_MARKUP_ERROR_MISSING_ATTRIBUTE,

		      "Missing attribute on element '%s': 'line'",element_name);

		    return;

		}

		baton->state=WARNINGS_IN_AT;

	    }

	    else if (!strcmp(element_name,"text"))

	    {

		if (attribute_names[0])

		{

		    g_set_error(error,G_MARKUP_ERROR,

		      G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,

		      "Unknown attribute on element 'text': '%s'",

		      attribute_names[0]);

		    return;

		}

		baton->state=WARNINGS_IN_TEXT;

	    }

	    break;

	case WARNINGS_IN_AT:

	    g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_UNKNOWN_ELEMENT,

	      "Unknown element in 'at': '%s'",element_name);

	    return;

	case WARNINGS_IN_TEXT:

	    g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_UNKNOWN_ELEMENT,

	      "Unknown element in 'text': '%s'",element_name);

	    return;

	default:

	    g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_UNKNOWN_ELEMENT,

	      "Unexpected element: '%s'",element_name);

	    return;

    }

}

static void warnings_parser_end_element(GMarkupParseContext *context,

  const char *element_name,void *user_data,GError **error)

{

    WarningsBaton *baton=user_data;

    switch(baton->state)

    {

	case WARNINGS_IN_EXPECTED:

	    baton->testcase->warnings=

	      g_slist_reverse(baton->testcase->warnings);

	    baton->state=WARNINGS_DONE;

	    break;

	case WARNINGS_IN_WARNING:

	    baton->warning->locations=

	      g_slist_reverse(baton->warning->locations);

	    baton->testcase->warnings=g_slist_prepend(baton->testcase->warnings,

	      baton->warning);

	    baton->warning=NULL;

	    baton->state=WARNINGS_IN_EXPECTED;

	    break;

	case WARNINGS_IN_AT:

	    baton->warning->locations=g_slist_prepend(baton->warning->locations,

	      baton->location);

	    baton->location=NULL;

	    baton->state=WARNINGS_IN_WARNING;

	    break;

	case WARNINGS_IN_TEXT:

	    baton->state=WARNINGS_IN_WARNING;

	    break;

	default:

	    g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_UNKNOWN_ELEMENT,

	      "Unexpected element ending: '%s'",element_name);

	    return;

    }

}

static void warnings_parser_text(GMarkupParseContext *context,

  const char *text,gsize text_len,void *user_data,GError **error)

{

    char *s,*t;

    WarningsBaton *baton=user_data;

    switch(baton->state)

    {

	case WARNINGS_IN_EXPECTED:

	    if (strspn(text," \t\n")!=text_len)

		g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_INVALID_CONTENT,

		  "The 'expected' tag does not take any content");

	    break;

	case WARNINGS_IN_WARNING:

	    if (strspn(text," \t\n")!=text_len)

		g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_INVALID_CONTENT,

		  "The warning tags do not take any content");

	    break;

	case WARNINGS_IN_AT:

	    if (strspn(text," \t\n")!=text_len)

		g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_INVALID_CONTENT,

		  "The 'at' tag does not take any content");

	    break;

	case WARNINGS_IN_TEXT:

	    s=g_strdup(text+strspn(text," \t\n"));

	    g_strchomp(s);

	    if (baton->warning->text)

	    {

		t=g_strconcat(baton->warning->text,s,NULL);

		g_free(baton->warning->text);

		g_free(s);

		baton->warning->text=t;

	    }

	    else

		baton->warning->text=s;

	    break;

	default:

	    g_set_error(error,G_MARKUP_ERROR,G_MARKUP_ERROR_INVALID_CONTENT,

	      "Unexpected content: '%s'",text);

	    return;

    }

}

GMarkupParseContext *warnings_parse_context_new(Testcase *testcase)

{

    static GMarkupParser parser={0};

    WarningsBaton *baton;

    parser.start_element=warnings_parser_start_element;

    parser.end_element=warnings_parser_end_element;

    parser.text=warnings_parser_text;

    baton=g_new0(WarningsBaton,1);

    baton->testcase=testcase;

    baton->state=WARNINGS_INIT;

    return g_markup_parse_context_new(&parser,

      G_MARKUP_TREAT_CDATA_AS_TEXT|G_MARKUP_PREFIX_ERROR_POSITION,

      baton,g_free);

}