Rename `MRB_{ENABLE,DISABLE}_` to `MRB_{USE,NO}_`; close #5163

|        Previous Name         |        New Name         |
|------------------------------|-------------------------|
| MRB_ENABLE_ALL_SYMBOLS       | MRB_USE_ALL_SYMBOLS     |
| MRB_ENABLE_SYMBOLL_ALL       | MRB_USE_ALL_SYMBOLS     |
| MRB_ENABLE_CXX_ABI           | MRB_USE_CXX_ABI         |
| MRB_ENABLE_CXX_EXCEPTION     | MRB_USE_CXX_EXCEPTION   |
| MRB_ENABLE_DEBUG_HOOK        | MRB_USE_DEBUG_HOOK      |
| MRB_DISABLE_DIRECT_THREADING | MRB_NO_DIRECT_THREADING |
| MRB_DISABLE_STDIO            | MRB_NO_STDIO            |
| ENABLE_LINENOISE             | MRB_USE_LINENOISE       |
| ENABLE_READLINE              | MRB_USE_READLINE        |
| DISABLE_MIRB_UNDERSCORE      | MRB_NO_MIRB_UNDERSCORE  |
| DISABLE_GEMS                 | MRB_NO_GEMS             |

* `MRB_ENABLE_SYMBOLL_ALL` seems to be a typo, so it is fixed.
* `MRB_` prefix is added to those without.
* The previous names can also be used for compatibility.

6 files changed, 35 insertions, 25 deletions

diff --git a/include/mrbconf.h b/include/mrbconf.h
index 89b3e9022..506fefb18 100644
--- a/include/mrbconf.h
+++ b/include/mrbconf.h
@@ -148,26 +148,36 @@
 /* fixed size state atexit stack */
 //#define MRB_FIXED_STATE_ATEXIT_STACK
 
-/* -DMRB_DISABLE_XXXX to drop following features */
-//#define MRB_DISABLE_STDIO /* use of stdio */
+/* -DMRB_NO_XXXX to drop following features */
+//#define MRB_NO_STDIO /* use of stdio */
 
-/* -DMRB_ENABLE_XXXX to enable following features */
-//#define MRB_ENABLE_DEBUG_HOOK /* hooks for debugger */
-//#define MRB_ENABLE_ALL_SYMBOLS /* Symbols.all_symbols */
+/* -DMRB_USE_XXXX to enable following features */
+//#define MRB_USE_DEBUG_HOOK /* hooks for debugger */
+//#define MRB_USE_ALL_SYMBOLS /* Symbols.all_symbols */
 
-/* end of configuration */
-
-/* define MRB_DISABLE_XXXX from DISABLE_XXX (for compatibility) */
-#ifdef DISABLE_STDIO
-#define MRB_DISABLE_STDIO
+/* obsolete configurations */
+#if defined(DISABLE_STDIO) || defined(MRB_DISABLE_STDIO)
+# define MRB_NO_STDIO
 #endif
-
-/* define MRB_ENABLE_XXXX from ENABLE_XXX (for compatibility) */
-#ifdef ENABLE_DEBUG
-#define MRB_ENABLE_DEBUG_HOOK
+#ifdef MRB_DISABLE_DIRECT_THREADING
+# define MRB_NO_DIRECT_THREADING
+#endif
+#if defined(ENABLE_DEBUG) || defined(MRB_ENABLE_DEBUG_HOOK)
+# define MRB_USE_DEBUG_HOOK
+#endif
+#ifdef MRB_ENABLE_ALL_SYMBOLS
+# define MRB_USE_ALL_SYMBOLS
 #endif
+#ifdef MRB_ENABLE_CXX_ABI
+# define MRB_USE_CXX_ABI
+#endif
+#ifdef MRB_ENABLE_CXX_EXCEPTION
+# define MRB_USE_CXX_EXCEPTION
+#endif
+
+/* end of configuration */
 
-#ifndef MRB_DISABLE_STDIO
+#ifndef MRB_NO_STDIO
 # include <stdio.h>
 #endif
 
diff --git a/include/mruby.h b/include/mruby.h
index 8099a85e2..a5116f9ee 100644
--- a/include/mruby.h
+++ b/include/mruby.h
@@ -269,11 +269,11 @@ typedef struct mrb_state {
   struct symbol_name *symtbl;   /* symbol table */
   mrb_sym symhash[256];
   size_t symcapa;
-#ifndef MRB_ENABLE_SYMBOLL_ALL
+#ifndef MRB_USE_ALL_SYMBOLS
   char symbuf[8];               /* buffer for small symbol names */
 #endif
 
-#ifdef MRB_ENABLE_DEBUG_HOOK
+#ifdef MRB_USE_DEBUG_HOOK
   void (*code_fetch_hook)(struct mrb_state* mrb, const struct mrb_irep *irep, const mrb_code *pc, mrb_value *regs);
   void (*debug_op_hook)(struct mrb_state* mrb, const struct mrb_irep *irep, const mrb_code *pc, mrb_value *regs);
 #endif
diff --git a/include/mruby/common.h b/include/mruby/common.h
index 1f91c5607..90c97cf65 100644
--- a/include/mruby/common.h
+++ b/include/mruby/common.h
@@ -14,7 +14,7 @@
 #endif
 
 #ifdef __cplusplus
-#ifdef MRB_ENABLE_CXX_ABI
+#ifdef MRB_USE_CXX_ABI
 #define MRB_BEGIN_DECL
 #define MRB_END_DECL
 #else
diff --git a/include/mruby/compile.h b/include/mruby/compile.h
index ce874da6b..7b5da4f69 100644
--- a/include/mruby/compile.h
+++ b/include/mruby/compile.h
@@ -115,7 +115,7 @@ struct mrb_parser_state {
   struct mrb_pool *pool;
   mrb_ast_node *cells;
   const char *s, *send;
-#ifndef MRB_DISABLE_STDIO
+#ifndef MRB_NO_STDIO
   /* If both f and s are non-null, it will be taken preferentially from s until s < send. */
   FILE *f;
 #endif
@@ -174,7 +174,7 @@ MRB_API void mrb_parser_set_filename(struct mrb_parser_state*, char const*);
 MRB_API mrb_sym mrb_parser_get_filename(struct mrb_parser_state*, uint16_t idx);
 
 /* utility functions */
-#ifndef MRB_DISABLE_STDIO
+#ifndef MRB_NO_STDIO
 MRB_API struct mrb_parser_state* mrb_parse_file(mrb_state*,FILE*,mrbc_context*);
 #endif
 MRB_API struct mrb_parser_state* mrb_parse_string(mrb_state*,const char*,mrbc_context*);
@@ -191,7 +191,7 @@ MRB_API mrb_value mrb_load_exec(mrb_state *mrb, struct mrb_parser_state *p, mrbc
 * mrb_value status = mrb_load_string(mrb, buffer);
 * mrb_gc_arena_restore(mrb, ai);
 */
-#ifndef MRB_DISABLE_STDIO
+#ifndef MRB_NO_STDIO
 MRB_API mrb_value mrb_load_file(mrb_state*,FILE*);
 MRB_API mrb_value mrb_load_file_cxt(mrb_state*,FILE*, mrbc_context *cxt);
 MRB_API mrb_value mrb_load_detect_file_cxt(mrb_state *mrb, FILE *fp, mrbc_context *c);
diff --git a/include/mruby/dump.h b/include/mruby/dump.h
index 90eaca184..d3d37c6c1 100644
--- a/include/mruby/dump.h
+++ b/include/mruby/dump.h
@@ -19,7 +19,7 @@ MRB_BEGIN_DECL
 #define DUMP_DEBUG_INFO 1
 
 int mrb_dump_irep(mrb_state *mrb, const mrb_irep *irep, uint8_t flags, uint8_t **bin, size_t *bin_size);
-#ifndef MRB_DISABLE_STDIO
+#ifndef MRB_NO_STDIO
 int mrb_dump_irep_binary(mrb_state*, const mrb_irep*, uint8_t, FILE*);
 int mrb_dump_irep_cfunc(mrb_state *mrb, const mrb_irep*, uint8_t flags, FILE *f, const char *initname);
 int mrb_dump_irep_cstruct(mrb_state *mrb, const mrb_irep*, uint8_t flags, FILE *f, const char *initname);
diff --git a/include/mruby/throw.h b/include/mruby/throw.h
index b5ea7312e..39f2c450b 100644
--- a/include/mruby/throw.h
+++ b/include/mruby/throw.h
@@ -7,13 +7,13 @@
 #ifndef MRB_THROW_H
 #define MRB_THROW_H
 
-#if defined(MRB_ENABLE_CXX_ABI)
+#if defined(MRB_USE_CXX_ABI)
 # if !defined(__cplusplus)
 #  error Trying to use C++ exception handling in C code
 # endif
 #endif
 
-#if defined(MRB_ENABLE_CXX_EXCEPTION)
+#if defined(MRB_USE_CXX_EXCEPTION)
 
 # if defined(__cplusplus)
 
@@ -52,7 +52,7 @@ typedef mrb_int mrb_jmpbuf_impl;
 struct mrb_jmpbuf {
   mrb_jmpbuf_impl impl;
 
-#if defined(MRB_ENABLE_CXX_EXCEPTION)
+#if defined(MRB_USE_CXX_EXCEPTION)
   static mrb_int jmpbuf_id;
 # if defined(__cplusplus)
   mrb_jmpbuf() : impl(jmpbuf_id++) {}