From 3b07736b6d4d6c8110e487b0001661f9251b5016 Mon Sep 17 00:00:00 2001
From: David Lechner <david@lechnology.com>
Date: Sat, 21 Mar 2020 17:19:49 -0500
Subject: [PATCH] unix,windows: Use STDIN_FILENO, STDOUT_FILENO macros where
 appropriate.

This replaces 0 and 1 with STDIN_FILENO and STDOUT_FILENO to make the
intention of the code clearer.
---
 ports/minimal/uart_core.c     | 4 ++--
 ports/unix/unix_mphal.c       | 4 ++--
 ports/windows/windows_mphal.c | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/ports/minimal/uart_core.c b/ports/minimal/uart_core.c
index 5b3797d2eb..c7af24404b 100644
--- a/ports/minimal/uart_core.c
+++ b/ports/minimal/uart_core.c
@@ -17,7 +17,7 @@ typedef struct {
 int mp_hal_stdin_rx_chr(void) {
     unsigned char c = 0;
     #if MICROPY_MIN_USE_STDOUT
-    int r = read(0, &c, 1);
+    int r = read(STDIN_FILENO, &c, 1);
     (void)r;
     #elif MICROPY_MIN_USE_STM32_MCU
     // wait for RXNE
@@ -31,7 +31,7 @@ int mp_hal_stdin_rx_chr(void) {
 // Send string of given length
 void mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
     #if MICROPY_MIN_USE_STDOUT
-    int r = write(1, str, len);
+    int r = write(STDOUT_FILENO, str, len);
     (void)r;
     #elif MICROPY_MIN_USE_STM32_MCU
     while (len--) {
diff --git a/ports/unix/unix_mphal.c b/ports/unix/unix_mphal.c
index 0d7638f4eb..966d7c0ece 100644
--- a/ports/unix/unix_mphal.c
+++ b/ports/unix/unix_mphal.c
@@ -167,7 +167,7 @@ main_term:;
 
     MP_THREAD_GIL_EXIT();
     unsigned char c;
-    int ret = read(0, &c, 1);
+    int ret = read(STDIN_FILENO, &c, 1);
     MP_THREAD_GIL_ENTER();
     if (ret == 0) {
         c = 4; // EOF, ctrl-D
@@ -179,7 +179,7 @@ main_term:;
 
 void mp_hal_stdout_tx_strn(const char *str, size_t len) {
     MP_THREAD_GIL_EXIT();
-    int ret = write(1, str, len);
+    int ret = write(STDOUT_FILENO, str, len);
     MP_THREAD_GIL_ENTER();
     mp_uos_dupterm_tx_strn(str, len);
     (void)ret; // to suppress compiler warning
diff --git a/ports/windows/windows_mphal.c b/ports/windows/windows_mphal.c
index 7835c6121c..6ee37fdd27 100644
--- a/ports/windows/windows_mphal.c
+++ b/ports/windows/windows_mphal.c
@@ -222,7 +222,7 @@ int mp_hal_stdin_rx_chr(void) {
 
 void mp_hal_stdout_tx_strn(const char *str, size_t len) {
     MP_THREAD_GIL_EXIT();
-    write(1, str, len);
+    write(STDOUT_FILENO, str, len);
     MP_THREAD_GIL_ENTER();
 }