unix: Convert to use core-provided version of built-in import().

unix/input.c

@@ -37,32 +37,8 @@
 #include "lib/mp-readline/readline.h"
 #endif
 
+#if MICROPY_USE_READLINE == 0
 char *prompt(char *p) {
-#if MICROPY_USE_READLINE == 1
-    // MicroPython supplied readline
-    vstr_t vstr;
-    vstr_init(&vstr, 16);
-    mp_hal_stdio_mode_raw();
-    int ret = readline(&vstr, p);
-    mp_hal_stdio_mode_orig();
-    if (ret != 0) {
-        vstr_clear(&vstr);
-        if (ret == CHAR_CTRL_D) {
-            // EOF
-            printf("\n");
-            return NULL;
-        } else {
-            printf("\n");
-            char *line = malloc(1);
-            line[0] = '\0';
-            return line;
-        }
-    }
-    vstr_null_terminated_str(&vstr);
-    char *line = malloc(vstr.len + 1);
-    memcpy(line, vstr.buf, vstr.len + 1);
-    vstr_clear(&vstr);
-#else
     // simple read string
     static char buf[256];
     fputs(p, stdout);
@@ -78,9 +54,9 @@ char *prompt(char *p) {
     }
     char *line = malloc(l);
     memcpy(line, buf, l);
-#endif
     return line;
 }
+#endif
 
 void prompt_read_history(void) {
 #if MICROPY_USE_READLINE_HISTORY
@@ -143,18 +119,3 @@ void prompt_write_history(void) {
     #endif
 #endif
 }
-
-STATIC mp_obj_t mp_builtin_input(size_t n_args, const mp_obj_t *args) {
-    if (n_args == 1) {
-        mp_obj_print(args[0], PRINT_STR);
-    }
-
-    char *line = prompt("");
-    if (line == NULL) {
-        nlr_raise(mp_obj_new_exception(&mp_type_EOFError));
-    }
-    mp_obj_t o = mp_obj_new_str(line, strlen(line), false);
-    free(line);
-    return o;
-}
-MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_input_obj, 0, 1, mp_builtin_input);

unix/mpconfigport.h

@@ -81,6 +81,7 @@
 #define MICROPY_PY_BUILTINS_FROZENSET (1)
 #define MICROPY_PY_BUILTINS_COMPILE (1)
 #define MICROPY_PY_BUILTINS_NOTIMPLEMENTED (1)
+#define MICROPY_PY_BUILTINS_INPUT   (1)
 #define MICROPY_PY_BUILTINS_POW3    (1)
 #define MICROPY_PY_MICROPYTHON_MEM_INFO (1)
 #define MICROPY_PY_ALL_SPECIAL_METHODS (1)
@@ -279,7 +280,6 @@ void mp_unix_mark_exec(void);
 #endif
 
 #define MICROPY_PORT_BUILTINS \
-    { MP_ROM_QSTR(MP_QSTR_input), MP_ROM_PTR(&mp_builtin_input_obj) }, \
     { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },
 
 #define MP_STATE_PORT MP_STATE_VM

unix/mphalport.h

@@ -34,6 +34,19 @@ void mp_hal_set_interrupt_char(char c);
 void mp_hal_stdio_mode_raw(void);
 void mp_hal_stdio_mode_orig(void);
 
+#if MICROPY_USE_READLINE == 1 && MICROPY_PY_BUILTINS_INPUT
+#include "py/misc.h"
+#include "lib/mp-readline/readline.h"
+// For built-in input() we need to wrap the standard readline() to enable raw mode
+#define mp_hal_readline mp_hal_readline
+static inline int mp_hal_readline(vstr_t *vstr, const char *p) {
+    mp_hal_stdio_mode_raw();
+    int ret = readline(vstr, p);
+    mp_hal_stdio_mode_orig();
+    return ret;
+}
+#endif
+
 // TODO: POSIX et al. define usleep() as guaranteedly capable only of 1s sleep:
 // "The useconds argument shall be less than one million."
 static inline void mp_hal_delay_ms(mp_uint_t ms) { usleep((ms) * 1000); }