Imported Upstream version 1.4.8upstream/1.4.8

1 files changed, 395 insertions, 0 deletions

diff --git a/lib/grammar.y b/lib/grammar.y
new file mode 100644
index 0000000..f578897
--- /dev/null
+++ b/lib/grammar.y
@@ -0,0 +1,395 @@
+/* -*- mode: C -*- */
+/* ----------------------------------------------------------------------------
+   libconfig - A library for processing structured configuration files
+   Copyright (C) 2005-2010  Mark A Lindner
+
+   This file is part of libconfig.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License
+   as published by the Free Software Foundation; either version 2.1 of
+   the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; if not, see
+   <http://www.gnu.org/licenses/>.
+   ----------------------------------------------------------------------------
+*/
+
+%defines
+%output="y.tab.c"
+%pure-parser
+%lex-param{void *scanner}
+%parse-param{void *scanner}
+%parse-param{struct parse_context *ctx}
+%parse-param{struct scan_context *scan_ctx}
+
+%{
+#include <string.h>
+#include <stdlib.h>
+#include "libconfig.h"
+#ifdef WIN32
+#include "wincompat.h"
+
+/* prevent warnings about redefined malloc/free in generated code: */
+#ifndef _STDLIB_H
+#define _STDLIB_H
+#endif
+
+#include <malloc.h>
+#endif
+#include "parsectx.h"
+#include "scanctx.h"
+
+/* these delcarations are provided to suppress compiler warnings */
+extern int libconfig_yylex();
+extern int libconfig_yyget_lineno();
+
+static const char *err_array_elem_type = "mismatched element type in array";
+static const char *err_duplicate_setting = "duplicate setting name";
+
+#define _delete(P) free((void *)(P))
+
+#define IN_ARRAY() \
+  (ctx->parent && (ctx->parent->type == CONFIG_TYPE_ARRAY))
+
+#define IN_LIST() \
+  (ctx->parent && (ctx->parent->type == CONFIG_TYPE_LIST))
+
+static void capture_parse_pos(void *scanner, struct scan_context *scan_ctx,
+                              config_setting_t *setting)
+{
+  setting->line = (unsigned int)libconfig_yyget_lineno(scanner);
+  setting->file = scanctx_current_filename(scan_ctx);
+}
+
+#define CAPTURE_PARSE_POS(S) \
+  capture_parse_pos(scanner, scan_ctx, (S))
+
+void libconfig_yyerror(void *scanner, struct parse_context *ctx,
+                       struct scan_context *scan_ctx, char const *s)
+{
+  if(ctx->config->error_text) return;
+  ctx->config->error_line = libconfig_yyget_lineno(scanner);
+  ctx->config->error_text = s;
+}
+
+%}
+
+%union
+{
+  int ival;
+  long long llval;
+  double fval;
+  char *sval;
+}
+
+%token <ival> TOK_BOOLEAN TOK_INTEGER TOK_HEX
+%token <llval> TOK_INTEGER64 TOK_HEX64
+%token <fval> TOK_FLOAT
+%token <sval> TOK_STRING TOK_NAME
+%token TOK_EQUALS TOK_NEWLINE TOK_ARRAY_START TOK_ARRAY_END TOK_LIST_START TOK_LIST_END TOK_COMMA TOK_GROUP_START TOK_GROUP_END TOK_SEMICOLON TOK_GARBAGE TOK_ERROR
+
+%%
+
+configuration:
+    /* empty */
+  | setting_list
+  ;
+
+setting_list:
+    setting
+  | setting_list setting
+  ;
+
+setting_list_optional:
+    /* empty */
+  | setting_list
+  ;
+
+setting_terminator:
+    /* empty */
+  | TOK_SEMICOLON
+  | TOK_COMMA
+  ;
+
+setting:
+  TOK_NAME
+  {
+    ctx->setting = config_setting_add(ctx->parent, $1, CONFIG_TYPE_NONE);
+
+    if(ctx->setting == NULL)
+    {
+      libconfig_yyerror(scanner, ctx, scan_ctx, err_duplicate_setting);
+      YYABORT;
+    }
+    else
+    {
+      CAPTURE_PARSE_POS(ctx->setting);
+    }
+  }
+
+  TOK_EQUALS value setting_terminator
+  ;
+
+array:
+  TOK_ARRAY_START
+  {
+    if(IN_LIST())
+    {
+      ctx->parent = config_setting_add(ctx->parent, NULL, CONFIG_TYPE_ARRAY);
+      CAPTURE_PARSE_POS(ctx->parent);
+    }
+    else
+    {
+      ctx->setting->type = CONFIG_TYPE_ARRAY;
+      ctx->parent = ctx->setting;
+      ctx->setting = NULL;
+    }
+  }
+  simple_value_list_optional
+  TOK_ARRAY_END
+  {
+    if(ctx->parent)
+      ctx->parent = ctx->parent->parent;
+  }
+  ;
+
+list:
+  TOK_LIST_START
+  {
+    if(IN_LIST())
+    {
+      ctx->parent = config_setting_add(ctx->parent, NULL, CONFIG_TYPE_LIST);
+      CAPTURE_PARSE_POS(ctx->parent);
+    }
+    else
+    {
+      ctx->setting->type = CONFIG_TYPE_LIST;
+      ctx->parent = ctx->setting;
+      ctx->setting = NULL;
+    }
+  }
+  value_list_optional
+  TOK_LIST_END
+  {
+    if(ctx->parent)
+      ctx->parent = ctx->parent->parent;
+  }
+  ;
+
+value:
+    simple_value
+  | array
+  | list
+  | group
+  ;
+
+string:
+  TOK_STRING { parsectx_append_string(ctx, $1); free($1); }
+  | string TOK_STRING { parsectx_append_string(ctx, $2); free($2); }
+  ;
+
+simple_value:
+    TOK_BOOLEAN
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      config_setting_t *e = config_setting_set_bool_elem(ctx->parent, -1,
+                                                         (int)$1);
+
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+      config_setting_set_bool(ctx->setting, (int)$1);
+  }
+  | TOK_INTEGER
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      config_setting_t *e = config_setting_set_int_elem(ctx->parent, -1, $1);
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        config_setting_set_format(e, CONFIG_FORMAT_DEFAULT);
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+    {
+      config_setting_set_int(ctx->setting, $1);
+      config_setting_set_format(ctx->setting, CONFIG_FORMAT_DEFAULT);
+    }
+  }
+  | TOK_INTEGER64
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      config_setting_t *e = config_setting_set_int64_elem(ctx->parent, -1, $1);
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        config_setting_set_format(e, CONFIG_FORMAT_DEFAULT);
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+    {
+      config_setting_set_int64(ctx->setting, $1);
+      config_setting_set_format(ctx->setting, CONFIG_FORMAT_DEFAULT);
+    }
+  }
+  | TOK_HEX
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      config_setting_t *e = config_setting_set_int_elem(ctx->parent, -1, $1);
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        config_setting_set_format(e, CONFIG_FORMAT_HEX);
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+    {
+      config_setting_set_int(ctx->setting, $1);
+      config_setting_set_format(ctx->setting, CONFIG_FORMAT_HEX);
+    }
+  }
+  | TOK_HEX64
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      config_setting_t *e = config_setting_set_int64_elem(ctx->parent, -1, $1);
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        config_setting_set_format(e, CONFIG_FORMAT_HEX);
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+    {
+      config_setting_set_int64(ctx->setting, $1);
+      config_setting_set_format(ctx->setting, CONFIG_FORMAT_HEX);
+    }
+  }
+  | TOK_FLOAT
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      config_setting_t *e = config_setting_set_float_elem(ctx->parent, -1, $1);
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+      config_setting_set_float(ctx->setting, $1);
+  }
+  | string
+  {
+    if(IN_ARRAY() || IN_LIST())
+    {
+      const char *s = parsectx_take_string(ctx);
+      config_setting_t *e = config_setting_set_string_elem(ctx->parent, -1, s);
+      _delete(s);
+
+      if(! e)
+      {
+        libconfig_yyerror(scanner, ctx, scan_ctx, err_array_elem_type);
+        YYABORT;
+      }
+      else
+      {
+        CAPTURE_PARSE_POS(e);
+      }
+    }
+    else
+    {
+      const char *s = parsectx_take_string(ctx);
+      config_setting_set_string(ctx->setting, s);
+      _delete(s);
+    }
+  }
+  ;
+
+value_list:
+    value
+  | value_list TOK_COMMA value
+  ;
+
+value_list_optional:
+    /* empty */
+  | value_list
+  ;
+
+simple_value_list:
+    simple_value
+  | simple_value_list TOK_COMMA simple_value
+  ;
+
+simple_value_list_optional:
+    /* empty */
+  | simple_value_list
+  ;
+
+group:
+  TOK_GROUP_START
+  {
+    if(IN_LIST())
+    {
+      ctx->parent = config_setting_add(ctx->parent, NULL, CONFIG_TYPE_GROUP);
+      CAPTURE_PARSE_POS(ctx->parent);
+    }
+    else
+    {
+      ctx->setting->type = CONFIG_TYPE_GROUP;
+      ctx->parent = ctx->setting;
+      ctx->setting = NULL;
+    }
+  }
+  setting_list_optional
+  TOK_GROUP_END
+  {
+    if(ctx->parent)
+      ctx->parent = ctx->parent->parent;
+  }
+  ;
+
+%%