[Keymap] Fix build error helix:five_rows (qmk#16847)

keyboards/helix/rev2/keymaps/five_rows/rules.mk

@@ -1,4 +1,5 @@
- SPLIT_KEYBOARD = yes
+USER_NAME := mtei
+SPLIT_KEYBOARD = yes
 
  CONSOLE_ENABLE = no        # Console for debug
  COMMAND_ENABLE = no        # Commands for debug and configuration

keyboards/helix/rev3_5rows/keymaps/five_rows/config.h

@@ -35,6 +35,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #    define OLED_UPDATE_INTERVAL 50
 #endif
 
+#define PSEUDO_SPRINTF_DEFINED
+
 // place overrides here
 
 // If you need more program area, try select and reduce rgblight modes to use.

keyboards/helix/rev3_5rows/keymaps/five_rows/rules.mk

@@ -1,3 +1,5 @@
+USER_NAME := mtei
+
  CONSOLE_ENABLE = no        # Console for debug
  COMMAND_ENABLE = no        # Commands for debug and configuration
  # CONSOLE_ENABLE and COMMAND_ENABLE

keyboards/helix/rev3_5rows/keymaps/five_rows/oled_display.c → users/mtei/oled_display.c

@@ -25,9 +25,7 @@
 #include <string.h>
 #include "layer_number.h"
 
-char *sprints(char *buf, char *src);
-char *sprintd(char *buf, char *leadstr, int data);
-char *sprint2d(char *buf, char *leadstr, int data);
+#include "pseudo_sprintf.h"
 
 extern int current_default_layer;
 
@@ -68,6 +66,10 @@ void matrix_update(struct CharacterMatrix *dest,
 }
 #    endif
 
+#ifndef PSEUDO_SPRINTF_DEFINED
+#include "pseudo_sprintf.c"
+#endif
+
 #    ifdef SSD1306OLED
 static void render_logo(struct CharacterMatrix *matrix) {
 #    else
@@ -80,8 +82,10 @@ static void render_logo(void) {
         0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,0xd2,0xd3,0xd4,
         0};
     oled_write_P(helix_logo, false);
+#    if defined(RGBLIGHT_ENABLE) || defined(DEBUG_MATRIX_SCAN_RATE)
     char buf[30];
     char *bufp;
+#    endif
 #    ifdef RGBLIGHT_ENABLE
     if (RGBLIGHT_MODES > 1 && rgblight_is_enabled()) {
         bufp = sprint2d(buf, " LED ", rgblight_get_mode());

users/mtei/pseudo_sprintf.c

@@ -0,0 +1,53 @@
+// Copyright 2022 Takeshi Ishii (@mtei)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "pseudo_sprintf.h"
+
+static char *sprint_decimal(char *buf, int data) {
+    if (data > 9) {
+        buf = sprint_decimal(buf, data/10);
+    }
+    *buf++ = "0123456789"[data%10];
+    *buf = '\0';
+    return buf;
+}
+
+static char *sprint_hex(char *buf, uint32_t data) {
+    if (data > 0xf) {
+        buf = sprint_hex(buf, data/0x10);
+    }
+    *buf++ = "0123456789abcdef"[data & 0xf];
+    *buf = '\0';
+    return buf;
+}
+
+char *sprints(char *buf, char *src) {
+    while (*src) {
+        *buf++ = *src++;
+    }
+    *buf = '\0';
+    return buf;
+}
+
+char *sprintx(char *buf, char *leadstr, uint32_t data) {
+    buf = sprints(buf, leadstr);
+    buf = sprint_hex(buf, data);
+    return buf;
+}
+
+char *sprintd(char *buf, char *leadstr, int data) {
+    buf = sprints(buf, leadstr);
+    buf = sprint_decimal(buf, data);
+    return buf;
+}
+
+char *sprint2d(char *buf, char *leadstr, int data) {
+    buf = sprints(buf, leadstr);
+    if (data > 99) {
+        return sprint_decimal(buf, data);
+    }
+    if (data < 10) {
+        *buf++ = ' ';
+    }
+    return sprint_decimal(buf, data);
+}

users/mtei/pseudo_sprintf.h

@@ -0,0 +1,8 @@
+// Copyright 2022 Takeshi Ishii (@mtei)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+char *sprints(char *buf, char *src);
+char *sprintd(char *buf, char *leadstr, int data);
+char *sprint2d(char *buf, char *leadstr, int data);