eval: Move get_float_arg to typval.h

Assuming `inline` is there for a reason, so it is kept and function was moved to
typval.h and not to typval.c which does not have problems with #including
message.h.

src/nvim/eval.c

@@ -6473,24 +6473,6 @@ static int non_zero_arg(typval_T *argvars)
  */
 
 
-/*
- * Get the float value of "argvars[0]" into "f".
- * Returns FAIL when the argument is not a Number or Float.
- */
-static inline int get_float_arg(typval_T *argvars, float_T *f)
-{
-  if (argvars[0].v_type == VAR_FLOAT) {
-    *f = argvars[0].vval.v_float;
-    return OK;
-  }
-  if (argvars[0].v_type == VAR_NUMBER) {
-    *f = (float_T)argvars[0].vval.v_number;
-    return OK;
-  }
-  EMSG(_("E808: Number or Float required"));
-  return FAIL;
-}
-
 // Apply a floating point C function on a typval with one float_T.
 //
 // Some versions of glibc on i386 have an optimization that makes it harder to
@@ -6502,7 +6484,7 @@ static void float_op_wrapper(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   float_T (*function)(float_T) = (float_T (*)(float_T))fptr;
 
   rettv->v_type = VAR_FLOAT;
-  if (get_float_arg(argvars, &f) == OK) {
+  if (tv_get_float(argvars, &f)) {
     rettv->vval.v_float = function(f);
   } else {
     rettv->vval.v_float = 0.0;
@@ -6957,15 +6939,16 @@ static void f_assert_true(typval_T *argvars, typval_T *rettv, FunPtr fptr)
  */
 static void f_atan2(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
-  float_T fx, fy;
+  float_T fx;
+  float_T fy;
 
   rettv->v_type = VAR_FLOAT;
-  if (get_float_arg(argvars, &fx) == OK
-      && get_float_arg(&argvars[1], &fy) == OK)
+  if (tv_get_float(argvars, &fx) && tv_get_float(&argvars[1], &fy)) {
     rettv->vval.v_float = atan2(fx, fy);
-  else
+  } else {
     rettv->vval.v_float = 0.0;
   }
+}
 
 /*
  * "browse(save, title, initdir, default)" function
@@ -8557,30 +8540,32 @@ static void f_float2nr(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
   float_T f;
 
-  if (get_float_arg(argvars, &f) == OK) {
-    if (f < -0x7fffffff)
-      rettv->vval.v_number = -0x7fffffff;
-    else if (f > 0x7fffffff)
-      rettv->vval.v_number = 0x7fffffff;
-    else
+  if (tv_get_float(argvars, &f)) {
+    if (f < VARNUMBER_MIN) {
+      rettv->vval.v_number = VARNUMBER_MIN;
+    } else if (f > VARNUMBER_MAX) {
+      rettv->vval.v_number = VARNUMBER_MAX;
+    } else {
       rettv->vval.v_number = (varnumber_T)f;
     }
   }
+}
 
 /*
  * "fmod()" function
  */
 static void f_fmod(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
-  float_T fx, fy;
+  float_T fx;
+  float_T fy;
 
   rettv->v_type = VAR_FLOAT;
-  if (get_float_arg(argvars, &fx) == OK
-      && get_float_arg(&argvars[1], &fy) == OK)
+  if (tv_get_float(argvars, &fx) && tv_get_float(&argvars[1], &fy)) {
     rettv->vval.v_float = fmod(fx, fy);
-  else
+  } else {
     rettv->vval.v_float = 0.0;
   }
+}
 
 /*
  * "fnameescape({string})" function
@@ -12790,15 +12775,16 @@ static void f_pathshorten(typval_T *argvars, typval_T *rettv, FunPtr fptr)
  */
 static void f_pow(typval_T *argvars, typval_T *rettv, FunPtr fptr)
 {
-  float_T fx, fy;
+  float_T fx;
+  float_T fy;
 
   rettv->v_type = VAR_FLOAT;
-  if (get_float_arg(argvars, &fx) == OK
-      && get_float_arg(&argvars[1], &fy) == OK)
+  if (tv_get_float(argvars, &fx) && tv_get_float(&argvars[1], &fy)) {
     rettv->vval.v_float = pow(fx, fy);
-  else
+  } else {
     rettv->vval.v_float = 0.0;
   }
+}
 
 /*
  * "prevnonblank()" function

src/nvim/eval/typval.h

@@ -13,6 +13,7 @@
 #include "nvim/lib/queue.h"
 #include "nvim/profile.h"  // for proftime_T
 #include "nvim/pos.h"      // for linenr_T
+#include "nvim/gettext.h"
 
 /// Type used for VimL VAR_NUMBER values
 typedef int varnumber_T;
@@ -370,6 +371,32 @@ extern bool tv_in_free_unref_items;
       } \
     })
 
+static inline bool tv_get_float(const typval_T *const tv, float_T *const ret_f)
+  REAL_FATTR_NONNULL_ALL REAL_FATTR_WARN_UNUSED_RESULT;
+
+// FIXME circular dependency, cannot import message.h.
+bool emsgf(const char *const fmt, ...);
+
+/// Get the float value
+///
+/// @param[in]  tv  VimL object to get value from.
+/// @param[out]  ret_f  Location where resulting float is stored.
+///
+/// @return true in case of success, false if tv is not a number or float.
+static inline bool tv_get_float(const typval_T *const tv, float_T *const ret_f)
+{
+  if (tv->v_type == VAR_FLOAT) {
+    *ret_f = tv->vval.v_float;
+    return true;
+  }
+  if (tv->v_type == VAR_NUMBER) {
+    *ret_f = (float_T)tv->vval.v_number;
+    return true;
+  }
+  emsgf(_("E808: Number or Float required"));
+  return false;
+}
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "eval/typval.h.generated.h"
 #endif

src/nvim/gettext.h

@@ -0,0 +1,21 @@
+#ifndef NVIM_GETTEXT_H
+#define NVIM_GETTEXT_H
+
+#ifdef HAVE_WORKING_LIBINTL
+# include <libintl.h>
+# define _(x) gettext((char *)(x))
+// XXX do we actually need this?
+# ifdef gettext_noop
+#  define N_(x) gettext_noop(x)
+# else
+#  define N_(x) x
+# endif
+#else
+# define _(x) ((char *)(x))
+# define N_(x) x
+# define bindtextdomain(x, y)  // empty
+# define bind_textdomain_codeset(x, y)  // empty
+# define textdomain(x)  // empty
+#endif
+
+#endif  // NVIM_GETTEXT_H

src/nvim/vim.h

@@ -51,22 +51,7 @@ Error: configure did not run properly.Check auto/config.log.
 
 /* ================ end of the header file puzzle =============== */
 
-#ifdef HAVE_WORKING_LIBINTL
-#  include <libintl.h>
-#  define _(x) gettext((char *)(x))
-// XXX do we actually need this?
-#  ifdef gettext_noop
-#    define N_(x) gettext_noop(x)
-#  else
-#    define N_(x) x
-#  endif
-#else
-#  define _(x) ((char *)(x))
-#  define N_(x) x
-#  define bindtextdomain(x, y) /* empty */
-#  define bind_textdomain_codeset(x, y) /* empty */
-#  define textdomain(x) /* empty */
-#endif
+#include "nvim/gettext.h"
 
 /* special attribute addition: Put message in history */
 #define MSG_HIST                0x1000