[Emacs-diffs] master d20d02f 1/2: Use standard checks whenever possible.

[Paul Eggert]

branch: master
commit d20d02fef7fd68f03db5abe48548068191dadedf
Author: Philipp Stephani <address@hidden>
Commit: Paul Eggert <address@hidden>

    Use standard checks whenever possible.
    
    This is possible in all functions where we catch signals anyway.
    
    * emacs-module.c (module_make_global_ref, module_funcall)
    (module_copy_string_contents, module_make_string): Use xsignal0
    and CHECK macros for argument checks.
---
 src/emacs-module.c |  123 +++++++++-------------------------------------------
 1 files changed, 21 insertions(+), 102 deletions(-)

diff --git a/src/emacs-module.c b/src/emacs-module.c
index 79a077b..d8f2c1d 100644
--- a/src/emacs-module.c
+++ b/src/emacs-module.c
@@ -107,14 +107,12 @@ static enum emacs_funcall_exit 
module_non_local_exit_check (emacs_env *);
 static void check_main_thread (void);
 static void finalize_environment (struct emacs_env_private *);
 static void initialize_environment (emacs_env *, struct emacs_env_private 
*priv);
-static void module_args_out_of_range (emacs_env *, Lisp_Object, Lisp_Object);
 static void module_handle_signal (emacs_env *, Lisp_Object);
 static void module_handle_throw (emacs_env *, Lisp_Object);
 static void module_non_local_exit_signal_1 (emacs_env *, Lisp_Object, 
Lisp_Object);
 static void module_non_local_exit_throw_1 (emacs_env *, Lisp_Object, 
Lisp_Object);
 static void module_out_of_memory (emacs_env *);
 static void module_reset_handlerlist (const int *);
-static void module_wrong_type (emacs_env *, Lisp_Object, Lisp_Object);
 
 /* We used to return NULL when emacs_value was a different type from
    Lisp_Object, but nowadays we just use Qnil instead.  Although they
@@ -269,12 +267,9 @@ module_make_global_ref (emacs_env *env, emacs_value ref)
   if (i >= 0)
     {
       Lisp_Object value = HASH_VALUE (h, i);
+      verify (EMACS_INT_MAX > MOST_POSITIVE_FIXNUM);
       EMACS_INT refcount = XFASTINT (value) + 1;
-      if (refcount > MOST_POSITIVE_FIXNUM)
-        {
-          module_non_local_exit_signal_1 (env, Qoverflow_error, Qnil);
-          return module_nil;
-        }
+      if (FIXNUM_OVERFLOW_P (refcount)) xsignal0 (Qoverflow_error);
       value = make_natnum (refcount);
       set_hash_value_slot (h, i, value);
     }
@@ -414,6 +409,7 @@ module_funcall (emacs_env *env, emacs_value fun, ptrdiff_t 
nargs,
      first arg, because that's what Ffuncall takes.  */
   Lisp_Object *newargs;
   USE_SAFE_ALLOCA;
+  if (nargs == PTRDIFF_MAX) xsignal0 (Qoverflow_error);
   SAFE_ALLOCA_LISP (newargs, nargs + 1);
   newargs[0] = value_to_lisp (fun);
   for (ptrdiff_t i = 0; i < nargs; i++)
@@ -460,11 +456,7 @@ module_extract_integer (emacs_env *env, emacs_value n)
 {
   MODULE_FUNCTION_BEGIN (0);
   Lisp_Object l = value_to_lisp (n);
-  if (! INTEGERP (l))
-    {
-      module_wrong_type (env, Qintegerp, l);
-      return 0;
-    }
+  CHECK_NUMBER (l);
   return XINT (l);
 }
 
@@ -472,11 +464,7 @@ static emacs_value
 module_make_integer (emacs_env *env, intmax_t n)
 {
   MODULE_FUNCTION_BEGIN (module_nil);
-  if (! (MOST_NEGATIVE_FIXNUM <= n && n <= MOST_POSITIVE_FIXNUM))
-    {
-      module_non_local_exit_signal_1 (env, Qoverflow_error, Qnil);
-      return module_nil;
-    }
+  if (FIXNUM_OVERFLOW_P (n)) xsignal0 (Qoverflow_error);
   return lisp_to_value (make_number (n));
 }
 
@@ -485,11 +473,7 @@ module_extract_float (emacs_env *env, emacs_value f)
 {
   MODULE_FUNCTION_BEGIN (0);
   Lisp_Object lisp = value_to_lisp (f);
-  if (! FLOATP (lisp))
-    {
-      module_wrong_type (env, Qfloatp, lisp);
-      return 0;
-    }
+  CHECK_TYPE (FLOATP (lisp), Qfloatp, lisp);
   return XFLOAT_DATA (lisp);
 }
 
@@ -506,19 +490,11 @@ module_copy_string_contents (emacs_env *env, emacs_value 
value, char *buffer,
 {
   MODULE_FUNCTION_BEGIN (false);
   Lisp_Object lisp_str = value_to_lisp (value);
-  if (! STRINGP (lisp_str))
-    {
-      module_wrong_type (env, Qstringp, lisp_str);
-      return false;
-    }
+  CHECK_STRING (lisp_str);
 
   Lisp_Object lisp_str_utf8 = ENCODE_UTF_8 (lisp_str);
   ptrdiff_t raw_size = SBYTES (lisp_str_utf8);
-  if (raw_size == PTRDIFF_MAX)
-    {
-      module_non_local_exit_signal_1 (env, Qoverflow_error, Qnil);
-      return false;
-    }
+  if (raw_size == PTRDIFF_MAX) xsignal0 (Qoverflow_error);
   ptrdiff_t required_buf_size = raw_size + 1;
 
   eassert (length != NULL);
@@ -534,8 +510,7 @@ module_copy_string_contents (emacs_env *env, emacs_value 
value, char *buffer,
   if (*length < required_buf_size)
     {
       *length = required_buf_size;
-      module_non_local_exit_signal_1 (env, Qargs_out_of_range, Qnil);
-      return false;
+      xsignal0 (Qargs_out_of_range);
     }
 
   *length = required_buf_size;
@@ -548,11 +523,7 @@ static emacs_value
 module_make_string (emacs_env *env, const char *str, ptrdiff_t length)
 {
   MODULE_FUNCTION_BEGIN (module_nil);
-  if (length > STRING_BYTES_BOUND)
-    {
-      module_non_local_exit_signal_1 (env, Qoverflow_error, Qnil);
-      return module_nil;
-    }
+  if (length > STRING_BYTES_BOUND) xsignal0 (Qoverflow_error);
   Lisp_Object lstr = make_unibyte_string (str, length);
   return lisp_to_value (code_convert_string_norecord (lstr, Qutf_8, false));
 }
@@ -569,11 +540,7 @@ module_get_user_ptr (emacs_env *env, emacs_value uptr)
 {
   MODULE_FUNCTION_BEGIN (NULL);
   Lisp_Object lisp = value_to_lisp (uptr);
-  if (! USER_PTRP (lisp))
-    {
-      module_wrong_type (env, Quser_ptr, lisp);
-      return NULL;
-    }
+  CHECK_TYPE (USER_PTRP (lisp), Quser_ptrp, lisp);
   return XUSER_PTR (lisp)->p;
 }
 
@@ -582,12 +549,8 @@ module_set_user_ptr (emacs_env *env, emacs_value uptr, 
void *ptr)
 {
   /* FIXME: This function should return bool because it can fail.  */
   MODULE_FUNCTION_BEGIN ();
-  check_main_thread ();
-  if (module_non_local_exit_check (env) != emacs_funcall_exit_return)
-    return;
   Lisp_Object lisp = value_to_lisp (uptr);
-  if (! USER_PTRP (lisp))
-    module_wrong_type (env, Quser_ptr, lisp);
+  CHECK_TYPE (USER_PTRP (lisp), Quser_ptrp, lisp);
   XUSER_PTR (lisp)->p = ptr;
 }
 
@@ -596,11 +559,7 @@ module_get_user_finalizer (emacs_env *env, emacs_value 
uptr)
 {
   MODULE_FUNCTION_BEGIN (NULL);
   Lisp_Object lisp = value_to_lisp (uptr);
-  if (! USER_PTRP (lisp))
-    {
-      module_wrong_type (env, Quser_ptr, lisp);
-      return NULL;
-    }
+  CHECK_TYPE (USER_PTRP (lisp), Quser_ptrp, lisp);
   return XUSER_PTR (lisp)->finalizer;
 }
 
@@ -611,8 +570,7 @@ module_set_user_finalizer (emacs_env *env, emacs_value uptr,
   /* FIXME: This function should return bool because it can fail.  */
   MODULE_FUNCTION_BEGIN ();
   Lisp_Object lisp = value_to_lisp (uptr);
-  if (! USER_PTRP (lisp))
-    module_wrong_type (env, Quser_ptr, lisp);
+  CHECK_TYPE (USER_PTRP (lisp), Quser_ptrp, lisp);
   XUSER_PTR (lisp)->finalizer = fin;
 }
 
@@ -622,19 +580,9 @@ module_vec_set (emacs_env *env, emacs_value vec, ptrdiff_t 
i, emacs_value val)
   /* FIXME: This function should return bool because it can fail.  */
   MODULE_FUNCTION_BEGIN ();
   Lisp_Object lvec = value_to_lisp (vec);
-  if (! VECTORP (lvec))
-    {
-      module_wrong_type (env, Qvectorp, lvec);
-      return;
-    }
-  if (! (0 <= i && i < ASIZE (lvec)))
-    {
-      if (MOST_NEGATIVE_FIXNUM <= i && i <= MOST_POSITIVE_FIXNUM)
-       module_args_out_of_range (env, lvec, make_number (i));
-      else
-       module_non_local_exit_signal_1 (env, Qoverflow_error, Qnil);
-      return;
-    }
+  CHECK_VECTOR (lvec);
+  if (FIXNUM_OVERFLOW_P (i)) xsignal0 (Qoverflow_error);
+  CHECK_RANGED_INTEGER (make_number (i), 0, ASIZE (lvec) - 1);
   ASET (lvec, i, value_to_lisp (val));
 }
 
@@ -643,19 +591,9 @@ module_vec_get (emacs_env *env, emacs_value vec, ptrdiff_t 
i)
 {
   MODULE_FUNCTION_BEGIN (module_nil);
   Lisp_Object lvec = value_to_lisp (vec);
-  if (! VECTORP (lvec))
-    {
-      module_wrong_type (env, Qvectorp, lvec);
-      return module_nil;
-    }
-  if (! (0 <= i && i < ASIZE (lvec)))
-    {
-      if (MOST_NEGATIVE_FIXNUM <= i && i <= MOST_POSITIVE_FIXNUM)
-       module_args_out_of_range (env, lvec, make_number (i));
-      else
-       module_non_local_exit_signal_1 (env, Qoverflow_error, Qnil);
-      return module_nil;
-    }
+  CHECK_VECTOR (lvec);
+  if (FIXNUM_OVERFLOW_P (i)) xsignal0 (Qoverflow_error);
+  CHECK_RANGED_INTEGER (make_number (i), 0, ASIZE (lvec) - 1);
   return lisp_to_value (AREF (lvec, i));
 }
 
@@ -665,11 +603,7 @@ module_vec_size (emacs_env *env, emacs_value vec)
   /* FIXME: Return a sentinel value (e.g., -1) on error.  */
   MODULE_FUNCTION_BEGIN (0);
   Lisp_Object lvec = value_to_lisp (vec);
-  if (! VECTORP (lvec))
-    {
-      module_wrong_type (env, Qvectorp, lvec);
-      return 0;
-    }
+  CHECK_VECTOR (lvec);
   return ASIZE (lvec);
 }
 
@@ -828,14 +762,6 @@ module_non_local_exit_throw_1 (emacs_env *env, Lisp_Object 
tag,
     }
 }
 
-/* Module version of `wrong_type_argument'.  */
-static void
-module_wrong_type (emacs_env *env, Lisp_Object predicate, Lisp_Object value)
-{
-  module_non_local_exit_signal_1 (env, Qwrong_type_argument,
-                                 list2 (predicate, value));
-}
-
 /* Signal an out-of-memory condition to the caller.  */
 static void
 module_out_of_memory (emacs_env *env)
@@ -846,13 +772,6 @@ module_out_of_memory (emacs_env *env)
                                  XCDR (Vmemory_signal_data));
 }
 
-/* Signal arguments are out of range.  */
-static void
-module_args_out_of_range (emacs_env *env, Lisp_Object a1, Lisp_Object a2)
-{
-  module_non_local_exit_signal_1 (env, Qargs_out_of_range, list2 (a1, a2));
-}
-
 
 /* Value conversion.  */