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/*
* Copyright (C) 2019 Canonical, Ltd.
* Author: Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <glib.h>
#include <glib/gstdio.h>
#include <gio/gio.h>
#include <yaml.h>
#include "parse.h"
#include "types.h"
/****************************************************
* Loading and error handling
****************************************************/
static void
write_error_marker(GString *message, int column)
{
int i;
for (i = 0; (column > 0 && i < column); i++)
g_string_append_printf(message, " ");
g_string_append_printf(message, "^");
}
static char *
get_syntax_error_context(const NetplanParser* npp, const int line_num, const int column, GError **error)
{
GString *message = NULL;
GFile *cur_file = g_file_new_for_path(npp->current.filename);
GFileInputStream *file_stream;
GDataInputStream *stream;
gsize len;
gchar* line = NULL;
message = g_string_sized_new(200);
file_stream = g_file_read(cur_file, NULL, error);
stream = g_data_input_stream_new (G_INPUT_STREAM(file_stream));
g_object_unref(file_stream);
for (int i = 0; i < line_num + 1; i++) {
g_free(line);
line = g_data_input_stream_read_line(stream, &len, NULL, error);
}
g_string_append_printf(message, "%s\n", line);
write_error_marker(message, column);
g_object_unref(stream);
g_object_unref(cur_file);
return g_string_free(message, FALSE);
}
static char *
get_parser_error_context(const yaml_parser_t *parser, GError **error)
{
GString *message = NULL;
unsigned char* line = parser->buffer.pointer;
unsigned char* current = line;
message = g_string_sized_new(200);
while (current > parser->buffer.start) {
current--;
if (*current == '\n') {
line = current + 1;
break;
}
}
if (current <= parser->buffer.start)
line = parser->buffer.start;
current = line + 1;
while (current <= parser->buffer.last) {
if (*current == '\n') {
*current = '\0';
break;
}
current++;
}
g_string_append_printf(message, "%s\n", line);
write_error_marker(message, parser->problem_mark.column);
return g_string_free(message, FALSE);
}
gboolean
parser_error(const yaml_parser_t* parser, const char* yaml, GError** error)
{
char *error_context = get_parser_error_context(parser, error);
if ((char)*parser->buffer.pointer == '\t')
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
"%s:%zu:%zu: Invalid YAML: tabs are not allowed for indent:\n%s",
yaml,
parser->problem_mark.line + 1,
parser->problem_mark.column + 1,
error_context);
else if (((char)*parser->buffer.pointer == ' ' || (char)*parser->buffer.pointer == '\0')
&& !parser->token_available)
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
"%s:%zu:%zu: Invalid YAML: aliases are not supported:\n%s",
yaml,
parser->problem_mark.line + 1,
parser->problem_mark.column + 1,
error_context);
else if (parser->state == YAML_PARSE_BLOCK_MAPPING_KEY_STATE)
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
"%s:%zu:%zu: Invalid YAML: inconsistent indentation:\n%s",
yaml,
parser->problem_mark.line + 1,
parser->problem_mark.column + 1,
error_context);
else {
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
"%s:%zu:%zu: Invalid YAML: %s:\n%s",
yaml,
parser->problem_mark.line + 1,
parser->problem_mark.column + 1,
parser->problem,
error_context);
}
g_free(error_context);
return FALSE;
}
/**
* Put a YAML specific error message for @node into @error.
*/
gboolean
yaml_error(const NetplanParser *npp, const yaml_node_t* node, GError** error, const char* msg, ...)
{
va_list argp;
char* s;
char* error_context = NULL;
va_start(argp, msg);
g_vasprintf(&s, msg, argp);
if (node != NULL) {
error_context = get_syntax_error_context(npp, node->start_mark.line, node->start_mark.column, error);
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
"%s:%zu:%zu: Error in network definition: %s\n%s",
npp->current.filename,
node->start_mark.line + 1,
node->start_mark.column + 1,
s,
error_context);
} else {
g_set_error(error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
"Error in network definition: %s", s);
}
g_free(s);
va_end(argp);
return FALSE;
}
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