[PATCH v8 18/21] libxlu: record location when parsing values

[Wei Liu <wei.liu2@citrix.com>]

Originally only setting has line number recorded. Since we're moving to
more sophisticated API, record the location for individual value. It is
useful for error reporting.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
---
Changes in v8:
1. Define YYLTYPE in libxl_internal.h and get rid of my hack.

Changes in v7:
1. Use yylloc in empty rule.
1. Use YYLTYPE instead of individual line / column values.
---
 tools/libxl/libxlu_cfg.c      |  8 ++++++--
 tools/libxl/libxlu_cfg_i.h    |  5 +++--
 tools/libxl/libxlu_cfg_y.c    |  6 +++---
 tools/libxl/libxlu_cfg_y.y    |  6 +++---
 tools/libxl/libxlu_internal.h | 10 ++++++++++
 5 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/tools/libxl/libxlu_cfg.c b/tools/libxl/libxlu_cfg.c
index 611f5ec..938ea96 100644
--- a/tools/libxl/libxlu_cfg.c
+++ b/tools/libxl/libxlu_cfg.c
@@ -311,7 +311,8 @@ const char *xlu_cfg_get_listitem(const XLU_ConfigList *list, int entry) {
 }
 
 
-XLU_ConfigValue *xlu__cfg_string_mk(CfgParseContext *ctx, char *atom)
+XLU_ConfigValue *xlu__cfg_string_mk(CfgParseContext *ctx, char *atom,
+                                    YYLTYPE *loc)
 {
     XLU_ConfigValue *value = NULL;
 
@@ -321,6 +322,7 @@ XLU_ConfigValue *xlu__cfg_string_mk(CfgParseContext *ctx, char *atom)
     if (!value) goto xe;
     value->type = XLU_STRING;
     value->u.string = atom;
+    memcpy(&value->loc, loc, sizeof(*loc));
 
     return value;
 
@@ -333,7 +335,8 @@ XLU_ConfigValue *xlu__cfg_string_mk(CfgParseContext *ctx, char *atom)
 }
 
 XLU_ConfigValue *xlu__cfg_list_mk(CfgParseContext *ctx,
-                                  XLU_ConfigValue *val)
+                                  XLU_ConfigValue *val,
+                                  YYLTYPE *loc)
 {
     XLU_ConfigValue *value = NULL;
     XLU_ConfigValue **values = NULL;
@@ -350,6 +353,7 @@ XLU_ConfigValue *xlu__cfg_list_mk(CfgParseContext *ctx,
     value->u.list.nvalues = 1;
     value->u.list.avalues = 1;
     value->u.list.values = values;
+    memcpy(&value->loc, loc, sizeof(*loc));
 
     return value;
 
diff --git a/tools/libxl/libxlu_cfg_i.h b/tools/libxl/libxlu_cfg_i.h
index 11dc33f..1b59b33 100644
--- a/tools/libxl/libxlu_cfg_i.h
+++ b/tools/libxl/libxlu_cfg_i.h
@@ -26,9 +26,10 @@ void xlu__cfg_set_free(XLU_ConfigSetting *set);
 void xlu__cfg_set_store(CfgParseContext*, char *name,
                         XLU_ConfigValue *val, int lineno);
 XLU_ConfigValue *xlu__cfg_string_mk(CfgParseContext *ctx,
-                                    char *atom);
+                                    char *atom, YYLTYPE *loc);
 XLU_ConfigValue *xlu__cfg_list_mk(CfgParseContext *ctx,
-                                  XLU_ConfigValue *val);
+                                  XLU_ConfigValue *val,
+                                  YYLTYPE *loc);
 void xlu__cfg_list_append(CfgParseContext *ctx,
                           XLU_ConfigValue *list,
                           XLU_ConfigValue *val);
diff --git a/tools/libxl/libxlu_cfg_y.c b/tools/libxl/libxlu_cfg_y.c
index b05e48b..fbfdd0f 100644
--- a/tools/libxl/libxlu_cfg_y.c
+++ b/tools/libxl/libxlu_cfg_y.c
@@ -1515,7 +1515,7 @@ yyreduce:
 
 /* Line 1806 of yacc.c  */
 #line 62 "libxlu_cfg_y.y"
-    { (yyval.value)= xlu__cfg_string_mk(ctx,(yyvsp[(1) - (1)].string)); }
+    { (yyval.value)= xlu__cfg_string_mk(ctx,(yyvsp[(1) - (1)].string),&(yylsp[(1) - (1)])); }
     break;
 
   case 13:
@@ -1543,7 +1543,7 @@ yyreduce:
 
 /* Line 1806 of yacc.c  */
 #line 68 "libxlu_cfg_y.y"
-    { (yyval.value)= xlu__cfg_list_mk(ctx,NULL); }
+    { (yyval.value)= xlu__cfg_list_mk(ctx,NULL,&yylloc); }
     break;
 
   case 17:
@@ -1564,7 +1564,7 @@ yyreduce:
 
 /* Line 1806 of yacc.c  */
 #line 72 "libxlu_cfg_y.y"
-    { (yyval.value)= xlu__cfg_list_mk(ctx,(yyvsp[(1) - (2)].value)); }
+    { (yyval.value)= xlu__cfg_list_mk(ctx,(yyvsp[(1) - (2)].value),&(yylsp[(1) - (2)])); }
     break;
 
   case 20:
diff --git a/tools/libxl/libxlu_cfg_y.y b/tools/libxl/libxlu_cfg_y.y
index 4a5ca3a..a923f76 100644
--- a/tools/libxl/libxlu_cfg_y.y
+++ b/tools/libxl/libxlu_cfg_y.y
@@ -59,17 +59,17 @@ assignment: IDENT '=' value { xlu__cfg_set_store(ctx,$1,$3,@3.first_line); }
 endstmt: NEWLINE
  |      ';'
 
-value:  atom                         { $$= xlu__cfg_string_mk(ctx,$1); }
+value:  atom                         { $$= xlu__cfg_string_mk(ctx,$1,&@1); }
  |      '[' nlok valuelist ']'       { $$= $3; }
 
 atom:   STRING                   { $$= $1; }
  |      NUMBER                   { $$= $1; }
 
-valuelist: /* empty */           { $$= xlu__cfg_list_mk(ctx,NULL); }
+valuelist: /* empty */           { $$= xlu__cfg_list_mk(ctx,NULL,&yylloc); }
  |      values                  { $$= $1; }
  |      values ',' nlok         { $$= $1; }
 
-values: value nlok                  { $$= xlu__cfg_list_mk(ctx,$1); }
+values: value nlok                  { $$= xlu__cfg_list_mk(ctx,$1,&@1); }
  |      values ',' nlok value nlok  { xlu__cfg_list_append(ctx,$1,$4); $$= $1; }
 
 nlok:
diff --git a/tools/libxl/libxlu_internal.h b/tools/libxl/libxlu_internal.h
index 092a17a..600ff68 100644
--- a/tools/libxl/libxlu_internal.h
+++ b/tools/libxl/libxlu_internal.h
@@ -38,12 +38,22 @@ typedef struct XLU_ConfigList {
     XLU_ConfigValue **values;
 } XLU_ConfigList;
 
+typedef struct YYLTYPE
+{
+  int first_line;
+  int first_column;
+  int last_line;
+  int last_column;
+} YYLTYPE;
+#define YYLTYPE_IS_DECLARED
+
 struct XLU_ConfigValue {
     enum XLU_ConfigValueType type;
     union {
         char *string;
         XLU_ConfigList list;
     } u;
+    YYLTYPE loc;
 };
 
 typedef struct XLU_ConfigSetting { /* transparent */
-- 
1.9.1