From: Peter Verthez <Peter.Verthez@advalvas.be>
Date: Mon, 9 Sep 2002 18:24:14 +0000 (+0000)
Subject: Better checking of library result values.
X-Git-Url: https://git.dlugolecki.net.pl/?a=commitdiff_plain;h=09b30ce415e2a2b126ea4d5ef899608d5b94e99b;p=gedcom-parse.git

Better checking of library result values.
---

diff --git a/gom/gom.c b/gom/gom.c
index 2ddbb55..a0aa9d6 100644
--- a/gom/gom.c
+++ b/gom/gom.c
@@ -52,8 +52,8 @@
 #include "gom.h"
 #include "gom_internal.h"
 
-void gom_default_callback (Gedcom_elt elt, Gedcom_ctxt parent, int level, char* tag,
-			   char* raw_value, int parsed_tag);
+void gom_default_callback (Gedcom_elt elt, Gedcom_ctxt parent, int level,
+			   char* tag, char* raw_value, int parsed_tag);
 
 void gom_cleanup()
 {
@@ -98,16 +98,22 @@ int gom_parse_file(char* file_name)
   source_event_subscribe();
   source_description_subscribe();
 
-  atexit(gom_cleanup);
+  if (atexit(gom_cleanup) != 0) {
+    gedcom_warning(_("Could not register gom cleanup function"));
+  }
   return gedcom_parse_file(file_name);
 }
 
 Gom_ctxt make_gom_ctxt(int ctxt_type, OBJ_TYPE obj_type, void *ctxt_ptr)
 {
   Gom_ctxt ctxt   = (Gom_ctxt)malloc(sizeof(struct Gom_ctxt_struct));
-  ctxt->ctxt_type = ctxt_type;
-  ctxt->obj_type  = obj_type;
-  ctxt->ctxt_ptr  = ctxt_ptr;
+  if (! ctxt)
+    MEMORY_ERROR;
+  else {
+    ctxt->ctxt_type = ctxt_type;
+    ctxt->obj_type  = obj_type;
+    ctxt->ctxt_ptr  = ctxt_ptr;
+  }
   return ctxt;
 }
 
@@ -117,7 +123,7 @@ void NULL_DESTROY(void* anything)
 
 void destroy_gom_ctxt(Gom_ctxt ctxt)
 {
-  free(ctxt);
+  SAFE_FREE(ctxt);
 }
 
 void gom_cast_error(char* file, int line, OBJ_TYPE expected, OBJ_TYPE found)
@@ -128,6 +134,11 @@ void gom_cast_error(char* file, int line, OBJ_TYPE expected, OBJ_TYPE found)
   abort();
 }
 
+void gom_mem_error(char *filename, int line)
+{
+  gedcom_error(_("Could not allocate memory at %s, %d"), filename, line);
+}
+
 void gom_unexpected_context(char* file, int line, OBJ_TYPE found)
 {
   gedcom_warning(_("Internal error: Unexpected context at %s, line %d: %d"),
@@ -207,7 +218,11 @@ struct date_value* dup_date(struct date_value dv)
 {
   struct date_value* dv_ptr;
   dv_ptr = (struct date_value*) malloc(sizeof(struct date_value));
-  memcpy(dv_ptr, &dv, sizeof(struct date_value));
+  if (! dv_ptr)
+    MEMORY_ERROR;
+  else {
+    memcpy(dv_ptr, &dv, sizeof(struct date_value));
+  }
   return dv_ptr;
 }
 
@@ -215,6 +230,10 @@ struct age_value* dup_age(struct age_value age)
 {
   struct age_value* age_ptr;
   age_ptr = (struct age_value*) malloc(sizeof(struct age_value));
-  memcpy(age_ptr, &age, sizeof(struct age_value));
+  if (! age_ptr)
+    MEMORY_ERROR;
+  else {
+    memcpy(age_ptr, &age, sizeof(struct age_value));
+  }
   return age_ptr;
 }
diff --git a/gom/gom_internal.h b/gom/gom_internal.h
index 42dfa76..71c0bc6 100644
--- a/gom/gom_internal.h
+++ b/gom/gom_internal.h
@@ -117,8 +117,12 @@ struct age_value*  dup_age(struct age_value age);
 #define MAKE_CHAIN_ELT(STRUCTTYPE, FIRSTVAL, VAL)                             \
   {                                                                           \
     VAL = (struct STRUCTTYPE*) malloc(sizeof(struct STRUCTTYPE));             \
-    memset (VAL, 0, sizeof(struct STRUCTTYPE));                               \
-    LINK_CHAIN_ELT(STRUCTTYPE, FIRSTVAL, VAL)                                 \
+    if (! VAL)                                                                \
+      MEMORY_ERROR;                                                           \
+    else {                                                                    \
+      memset (VAL, 0, sizeof(struct STRUCTTYPE));                             \
+      LINK_CHAIN_ELT(STRUCTTYPE, FIRSTVAL, VAL)                               \
+    }                                                                         \
   }
 
 void NULL_DESTROY(void* anything);
@@ -168,7 +172,13 @@ void NULL_DESTROY(void* anything);
     char *str = GEDCOM_STRING(parsed_value);                                  \
     struct STRUCTTYPE *obj                                                    \
       = SAFE_CTXT_CAST(STRUCTTYPE, (Gom_ctxt)parent);                         \
-    if (obj) obj->FIELD = strdup(str);                                        \
+    if (obj) {                                                                \
+      obj->FIELD = strdup(str);                                               \
+      if (! obj->FIELD) {                                                     \
+	MEMORY_ERROR;                                                         \
+	return NULL;                                                          \
+      }                                                                       \
+    }                                                                         \
     return (Gedcom_ctxt) MAKE_GOM_CTXT(elt, STRUCTTYPE, obj);                 \
   }
 
@@ -178,7 +188,13 @@ void NULL_DESTROY(void* anything);
     struct date_value dv = GEDCOM_DATE(parsed_value);                         \
     struct STRUCTTYPE *obj                                                    \
       = SAFE_CTXT_CAST(STRUCTTYPE, (Gom_ctxt)parent);                         \
-    if (obj) obj->FIELD = dup_date(dv);                                       \
+    if (obj) {                                                                \
+      obj->FIELD = dup_date(dv);                                              \
+      if (! obj->FIELD) {                                                     \
+	MEMORY_ERROR;                                                         \
+	return NULL;                                                          \
+      }                                                                       \
+    }                                                                         \
     return (Gedcom_ctxt) MAKE_GOM_CTXT(elt, STRUCTTYPE, obj);                 \
   }
 
@@ -188,7 +204,13 @@ void NULL_DESTROY(void* anything);
     struct age_value age = GEDCOM_AGE(parsed_value);                          \
     struct STRUCTTYPE *obj                                                    \
       = SAFE_CTXT_CAST(STRUCTTYPE, (Gom_ctxt)parent);                         \
-    if (obj) obj->FIELD = dup_age(age);                                       \
+    if (obj) {                                                                \
+      obj->FIELD = dup_age(age);                                              \
+      if (! obj->FIELD) {                                                     \
+	MEMORY_ERROR;                                                         \
+	return NULL;                                                          \
+      }                                                                       \
+    }                                                                         \
     return (Gedcom_ctxt) MAKE_GOM_CTXT(elt, STRUCTTYPE, obj);                 \
   }