--- /dev/null
+/* -*- mode: C; c-file-style: "gnu" -*- */
+/* desktop-file.c .desktop file parser
+ *
+ * Copyright (C) 2003 CodeFactory AB
+ * Copyright (C) 2003 Red Hat Inc.
+ *
+ * Licensed under the Academic Free License version 1.2
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include <dbus/dbus-sysdeps.h>
+#include <dbus/dbus-internals.h>
+#include "desktop-file.h"
+
+typedef enum
+{
+ BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX,
+ BUS_DESKTOP_PARSE_ERROR_INVALID_ESCAPES,
+ BUS_DESKTOP_PARSE_ERROR_INVALID_CHARS
+} BusDesktopParseError;
+
+typedef struct
+{
+ char *key;
+ char *value;
+} BusDesktopFileLine;
+
+typedef struct
+{
+ char *section_name;
+
+ int n_lines;
+ BusDesktopFileLine *lines;
+ int n_allocated_lines;
+} BusDesktopFileSection;
+
+struct BusDesktopFile
+{
+ int n_sections;
+ BusDesktopFileSection *sections;
+ int n_allocated_sections;
+};
+
+typedef struct
+{
+ DBusString data;
+
+ BusDesktopFile *desktop_file;
+ int current_section;
+
+ int pos, len;
+ int line_num;
+
+} BusDesktopFileParser;
+
+#define VALID_KEY_CHAR 1
+#define VALID_LOCALE_CHAR 2
+unsigned char valid[256] = {
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x3 , 0x2 , 0x0 ,
+ 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 ,
+ 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x0 , 0x0 , 0x0 , 0x0 , 0x2 ,
+ 0x0 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 ,
+ 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+ 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 ,
+};
+
+static void report_error (BusDesktopFileParser *parser,
+ char *message,
+ BusDesktopParseError error_code);
+
+static void
+parser_free (BusDesktopFileParser *parser)
+{
+ bus_desktop_file_free (parser->desktop_file);
+
+ _dbus_string_free (&parser->data);
+}
+
+static void
+bus_desktop_file_line_free (BusDesktopFileLine *line)
+{
+ dbus_free (line->key);
+ dbus_free (line->value);
+}
+
+static void
+bus_desktop_file_section_free (BusDesktopFileSection *section)
+{
+ int i;
+
+ for (i = 0; i < section->n_lines; i++)
+ bus_desktop_file_line_free (§ion->lines[i]);
+
+ dbus_free (section->lines);
+ dbus_free (section->section_name);
+}
+
+void
+bus_desktop_file_free (BusDesktopFile *desktop_file)
+{
+ int i;
+
+ for (i = 0; i < desktop_file->n_sections; i++)
+ bus_desktop_file_section_free (&desktop_file->sections[i]);
+ dbus_free (desktop_file->sections);
+
+ dbus_free (desktop_file);
+}
+
+static void
+grow_lines_in_section (BusDesktopFileSection *section)
+{
+ BusDesktopFileLine *lines;
+
+ int new_n_lines;
+
+ if (section->n_allocated_lines == 0)
+ new_n_lines = 1;
+ else
+ new_n_lines = section->n_allocated_lines*2;
+
+ _DBUS_HANDLE_OOM (lines = dbus_realloc (section->lines,
+ sizeof (BusDesktopFileLine) * new_n_lines));
+ section->lines = lines;
+
+ section->n_allocated_lines = new_n_lines;
+}
+
+static void
+grow_sections (BusDesktopFile *desktop_file)
+{
+ int new_n_sections;
+ BusDesktopFileSection *sections;
+
+ if (desktop_file->n_allocated_sections == 0)
+ new_n_sections = 1;
+ else
+ new_n_sections = desktop_file->n_allocated_sections*2;
+
+ _DBUS_HANDLE_OOM (sections = dbus_realloc (desktop_file->sections,
+ sizeof (BusDesktopFileSection) * new_n_sections));
+ desktop_file->sections = sections;
+
+ desktop_file->n_allocated_sections = new_n_sections;
+}
+
+static char *
+unescape_string (const DBusString *str, int pos, int end_pos)
+{
+ char *retval, *q;
+
+ /* len + 1 is enough, because unescaping never makes the
+ * string longer */
+ _DBUS_HANDLE_OOM (retval = dbus_malloc (end_pos - pos + 1));
+
+ q = retval;
+
+ while (pos < end_pos)
+ {
+ if (_dbus_string_get_byte (str, pos) == 0)
+ {
+ /* Found an embedded null */
+ dbus_free (retval);
+ return NULL;
+ }
+
+ if (_dbus_string_get_byte (str, pos) == '\\')
+ {
+ pos ++;
+
+ if (pos >= end_pos)
+ {
+ /* Escape at end of string */
+ dbus_free (retval);
+ return NULL;
+ }
+
+ switch (_dbus_string_get_byte (str, pos))
+ {
+ case 's':
+ *q++ = ' ';
+ break;
+ case 't':
+ *q++ = '\t';
+ break;
+ case 'n':
+ *q++ = '\n';
+ break;
+ case 'r':
+ *q++ = '\r';
+ break;
+ case '\\':
+ *q++ = '\\';
+ break;
+ default:
+ /* Invalid escape code */
+ dbus_free (retval);
+ return NULL;
+ }
+ pos++;
+ }
+ else
+ {
+ *q++ =_dbus_string_get_byte (str, pos);
+
+ pos++;
+ }
+ }
+
+ *q = 0;
+
+ return retval;
+}
+
+static BusDesktopFileSection*
+new_section (BusDesktopFile *desktop_file,
+ const char *name)
+{
+ int n;
+
+ if (desktop_file->n_allocated_sections == desktop_file->n_sections)
+ grow_sections (desktop_file);
+
+ n = desktop_file->n_sections++;
+
+ _DBUS_HANDLE_OOM (desktop_file->sections[n].section_name = _dbus_strdup (name));
+
+ desktop_file->sections[n].n_lines = 0;
+ desktop_file->sections[n].lines = NULL;
+ desktop_file->sections[n].n_allocated_lines = 0;
+
+ grow_lines_in_section (&desktop_file->sections[n]);
+
+ return &desktop_file->sections[n];
+}
+
+static BusDesktopFileSection*
+open_section (BusDesktopFileParser *parser,
+ char *name)
+{
+ BusDesktopFileSection *section;
+
+ section = new_section (parser->desktop_file, name);
+ if (section == NULL)
+ return NULL;
+
+ parser->current_section = parser->desktop_file->n_sections - 1;
+ _dbus_assert (&parser->desktop_file->sections[parser->current_section] == section);
+
+ return section;
+}
+
+static BusDesktopFileLine *
+new_line (BusDesktopFileParser *parser)
+{
+ BusDesktopFileSection *section;
+ BusDesktopFileLine *line;
+
+ section = &parser->desktop_file->sections[parser->current_section];
+
+ if (section->n_allocated_lines == section->n_lines)
+ grow_lines_in_section (section);
+
+ line = §ion->lines[section->n_lines++];
+
+ memset (line, 0, sizeof (BusDesktopFileLine));
+
+ return line;
+}
+
+static dbus_bool_t
+is_blank_line (BusDesktopFileParser *parser)
+{
+ int p;
+ char c;
+
+ p = parser->pos;
+
+ c = _dbus_string_get_byte (&parser->data, p);
+
+ while (c && c != '\n')
+ {
+ if (!(c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f'))
+ return FALSE;
+
+ p++;
+ c = _dbus_string_get_byte (&parser->data, p);
+ }
+
+ return TRUE;
+}
+
+static void
+parse_comment_or_blank (BusDesktopFileParser *parser)
+{
+ int line_end;
+
+ if (!_dbus_string_find (&parser->data, parser->pos, "\n", &line_end))
+ line_end = parser->len;
+
+ if (line_end == parser->len)
+ parser->pos = parser->len;
+ else
+ parser->pos = line_end + 1;
+
+ parser->line_num += 1;
+}
+
+static dbus_bool_t
+is_valid_section_name (const char *name)
+{
+ /* 5. Group names may contain all ASCII characters except for control characters and '[' and ']'. */
+
+ while (*name)
+ {
+ if (!((*name >= 'A' && *name <= 'Z') || (*name >= 'a' || *name <= 'z') ||
+ *name == '\n' || *name == '\t'))
+ return FALSE;
+
+ name++;
+ }
+
+ return TRUE;
+}
+
+static dbus_bool_t
+parse_section_start (BusDesktopFileParser *parser, DBusResultCode *result)
+{
+ int line_end;
+ char *section_name;
+
+ if (!_dbus_string_find (&parser->data, parser->pos, "\n", &line_end))
+ line_end = parser->len;
+
+ if (line_end - parser->pos <= 2 ||
+ _dbus_string_get_byte (&parser->data, line_end - 1) != ']')
+ {
+ report_error (parser, "Invalid syntax for section header", BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX);
+ parser_free (parser);
+ return FALSE;
+ }
+
+ section_name = unescape_string (&parser->data, parser->pos + 1, line_end - 1);
+
+ if (section_name == NULL)
+ {
+ report_error (parser, "Invalid escaping in section name", BUS_DESKTOP_PARSE_ERROR_INVALID_ESCAPES);
+ parser_free (parser);
+ return FALSE;
+ }
+
+ if (!is_valid_section_name (section_name))
+ {
+ report_error (parser, "Invalid characters in section name", BUS_DESKTOP_PARSE_ERROR_INVALID_CHARS);
+ parser_free (parser);
+ dbus_free (section_name);
+ return FALSE;
+ }
+
+ if (open_section (parser, section_name) == NULL)
+ {
+ dbus_free (section_name);
+ return FALSE;
+ }
+
+ if (line_end == parser->len)
+ parser->pos = parser->len;
+ else
+ parser->pos = line_end + 1;
+
+ parser->line_num += 1;
+
+ dbus_free (section_name);
+
+ return TRUE;
+}
+
+static dbus_bool_t
+parse_key_value (BusDesktopFileParser *parser, DBusResultCode *result)
+{
+ int line_end;
+ int key_start, key_end;
+ int value_start;
+ int p;
+ char *value, *tmp;
+ DBusString key;
+ BusDesktopFileLine *line;
+
+ if (!_dbus_string_find (&parser->data, parser->pos, "\n", &line_end))
+ line_end = parser->len;
+
+ p = parser->pos;
+ key_start = p;
+ while (p < line_end &&
+ (valid[_dbus_string_get_byte (&parser->data, p)] & VALID_KEY_CHAR))
+ p++;
+ key_end = p;
+
+ if (key_start == key_end)
+ {
+ report_error (parser, "Empty key name", BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX);
+ parser_free (parser);
+ return FALSE;
+ }
+
+ /* We ignore locales for now */
+
+ /* Skip space before '=' */
+ while (p < line_end && _dbus_string_get_byte (&parser->data, p) == ' ')
+ p++;
+
+ if (p < line_end && _dbus_string_get_byte (&parser->data, p) != '=')
+ {
+ report_error (parser, "Invalid characters in key name", BUS_DESKTOP_PARSE_ERROR_INVALID_CHARS);
+ parser_free (parser);
+ return FALSE;
+ }
+
+ if (p == line_end)
+ {
+ report_error (parser, "No '=' in key/value pair", BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX);
+ parser_free (parser);
+ return FALSE;
+ }
+
+ /* Skip the '=' */
+ p++;
+
+ /* Skip space after '=' */
+ while (p < line_end && _dbus_string_get_byte (&parser->data, p) == ' ')
+ p++;
+
+ value_start = p;
+
+ value = unescape_string (&parser->data, value_start, line_end);
+ if (value == NULL)
+ {
+ report_error (parser, "Invalid escaping in value", BUS_DESKTOP_PARSE_ERROR_INVALID_ESCAPES);
+ parser_free (parser);
+ return FALSE;
+ }
+
+ line = new_line (parser);
+
+ _DBUS_HANDLE_OOM (_dbus_string_init (&key, key_end - key_start));
+ _DBUS_HANDLE_OOM (_dbus_string_copy_len (&parser->data, key_start, key_end - key_start,
+ &key, 0));
+ _DBUS_HANDLE_OOM (_dbus_string_steal_data (&key, &tmp));
+ _dbus_string_free (&key);
+
+ line->key = tmp;
+ line->value = value;
+
+ if (line_end == parser->len)
+ parser->pos = parser->len;
+ else
+ parser->pos = line_end + 1;
+
+ parser->line_num += 1;
+
+ return TRUE;
+}
+
+static void
+report_error (BusDesktopFileParser *parser,
+ char *message,
+ BusDesktopParseError error_code)
+{
+ char *section_name = NULL;
+
+ /* FIXME: */
+ section_name = NULL;
+
+ if (section_name)
+ _dbus_verbose ("Error in section %s at line %d: %s\n", section_name, parser->line_num, message);
+ else
+ _dbus_verbose ("Error at line %d: %s\n", parser->line_num, message);
+}
+
+#if 0
+static void
+dump_desktop_file (BusDesktopFile *file)
+{
+ int i;
+
+ for (i = 0; i < file->n_sections; i++)
+ {
+ int j;
+
+ printf ("[%s]\n", file->sections[i].section_name);
+
+ for (j = 0; j < file->sections[i].n_lines; j++)
+ {
+ printf ("%s=%s\n", file->sections[i].lines[j].key,
+ file->sections[i].lines[j].value);
+ }
+ }
+}
+#endif
+
+BusDesktopFile *
+bus_desktop_file_load (const char *filename,
+ DBusResultCode *result)
+{
+ DBusString str, filename_str;
+ DBusResultCode result_code;
+ BusDesktopFileParser parser;
+
+ /* FIXME: Check file size so we don't try to load a ridicously large file. */
+
+ _dbus_string_init_const (&filename_str, filename);
+
+ _DBUS_HANDLE_OOM (_dbus_string_init (&str, _DBUS_INT_MAX));
+
+ _DBUS_HANDLE_OOM ((result_code = _dbus_file_get_contents (&str, &filename_str)) !=
+ DBUS_RESULT_NO_MEMORY);
+
+ if (result_code != DBUS_RESULT_SUCCESS)
+ {
+ _dbus_string_free (&str);
+ dbus_set_result (result, result_code);
+ return NULL;
+ }
+
+ if (!_dbus_string_validate_utf8 (&str, 0, _dbus_string_get_length (&str)))
+ {
+ _dbus_string_free (&str);
+ /* FIXME: Use a better error code */
+ dbus_set_result (result, result_code);
+ return NULL;
+ }
+
+ _DBUS_HANDLE_OOM (parser.desktop_file = dbus_malloc (sizeof (BusDesktopFile)));
+
+ memset (parser.desktop_file, 0, sizeof (BusDesktopFile));
+
+ parser.data = str;
+ parser.line_num = 1;
+ parser.pos = 0;
+ parser.len = _dbus_string_get_length (&parser.data);
+
+ while (parser.pos < parser.len)
+ {
+ if (_dbus_string_get_byte (&parser.data, parser.pos) == '[')
+ {
+ if (!parse_section_start (&parser, result))
+ return NULL;
+ }
+ else if (is_blank_line (&parser) ||
+ _dbus_string_get_byte (&parser.data, parser.pos) == '#')
+ parse_comment_or_blank (&parser);
+ else
+ {
+ if (!parse_key_value (&parser, result))
+ return NULL;
+ }
+ }
+
+ _dbus_string_free (&parser.data);
+
+ dbus_set_result (result, DBUS_RESULT_SUCCESS);
+
+ return parser.desktop_file;
+}
+
projects / platform / upstream / dbus.git / commitdiff