Fix conflicting types for 'tfp_printf' (#8269)

* Refactor to use mpaland/printf

* trim firmware size

* remove keymap changes

* run clang format

* Fixup after rebase

* fix up git-submodule command for printf

10 files changed, 15 insertions, 356 deletions

diff --git a/.gitmodules b/.gitmodules
index 6d8ab8b946..b8c66034b3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -16,3 +16,6 @@
 [submodule "lib/lufa"]
 	path = lib/lufa
 	url = https://github.com/qmk/lufa
+[submodule "lib/printf"]
+	path = lib/printf
+	url = https://github.com/mpaland/printf.git
diff --git a/Makefile b/Makefile
index 9478c14f8c..cc3bde6b1f 100644
--- a/Makefile
+++ b/Makefile
@@ -567,6 +567,7 @@ ifndef SKIP_GIT
 	if [ ! -e lib/chibios-contrib ]; then git submodule sync lib/chibios-contrib && git submodule update --depth 50 --init lib/chibios-contrib; fi
 	if [ ! -e lib/ugfx ]; then git submodule sync lib/ugfx && git submodule update --depth 50 --init lib/ugfx; fi
 	if [ ! -e lib/lufa ]; then git submodule sync lib/lufa && git submodule update --depth 50 --init lib/lufa; fi
+	if [ ! -e lib/printf ]; then git submodule sync lib/printf && git submodule update --depth 50 --init lib/printf; fi
 	git submodule status --recursive 2>/dev/null | \
 	while IFS= read -r x; do \
 		case "$$x" in \
diff --git a/lib/printf b/lib/printf
new file mode 160000
+Subproject d3b984684bb8a8bdc48cc7a1abecb93ce59bbe3
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index aa8a0eb7ad..63de7c7ede 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -1,3 +1,5 @@
+PRINTF_PATH = $(LIB_PATH)/printf
+
 COMMON_DIR = common
 PLATFORM_COMMON_DIR = $(COMMON_DIR)/$(PLATFORM_KEY)
 
@@ -21,7 +23,12 @@ TMK_COMMON_SRC +=	$(COMMON_DIR)/host.c \
 ifeq ($(PLATFORM),AVR)
   TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/xprintf.S
 else ifeq ($(PLATFORM),CHIBIOS)
-  TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
+  TMK_COMMON_SRC += $(PRINTF_PATH)/printf.c
+  TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_FLOAT
+  TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_EXPONENTIAL
+  TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_LONG_LONG
+  TMK_COMMON_DEFS += -DPRINTF_DISABLE_SUPPORT_PTRDIFF_T
+  VPATH += $(PRINTF_PATH)
 else ifeq ($(PLATFORM),ARM_ATSAM)
   TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
 endif
diff --git a/tmk_core/common/chibios/printf.c b/tmk_core/common/chibios/printf.c
deleted file mode 100644
index a99752bb3d..0000000000
--- a/tmk_core/common/chibios/printf.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * found at: http://www.sparetimelabs.com/tinyprintf/tinyprintf.php
- * and:      http://www.sparetimelabs.com/printfrevisited/printfrevisited.php
- */
-
-/*
-File: printf.c
-
-Copyright (C) 2004  Kustaa Nyholm
-
-This library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
-License as published by the Free Software Foundation; either
-version 2.1 of the License, or (at your option) any later version.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public
-License along with this library; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-
-*/
-
-#include "printf.h"
-
-typedef void (*putcf)(void*, char);
-static putcf stdout_putf;
-static void* stdout_putp;
-
-// this adds cca 400 bytes
-#define PRINTF_LONG_SUPPORT
-
-#ifdef PRINTF_LONG_SUPPORT
-
-static void uli2a(unsigned long int num, unsigned int base, int uc, char* bf) {
-    int          n = 0;
-    unsigned int d = 1;
-    while (num / d >= base) d *= base;
-    while (d != 0) {
-        int dgt = num / d;
-        num %= d;
-        d /= base;
-        if (n || dgt > 0 || d == 0) {
-            *bf++ = dgt + (dgt < 10 ? '0' : (uc ? 'A' : 'a') - 10);
-            ++n;
-        }
-    }
-    *bf = 0;
-}
-
-static void li2a(long num, char* bf) {
-    if (num < 0) {
-        num   = -num;
-        *bf++ = '-';
-    }
-    uli2a(num, 10, 0, bf);
-}
-
-#endif
-
-static void ui2a(unsigned int num, unsigned int base, int uc, char* bf) {
-    int          n = 0;
-    unsigned int d = 1;
-    while (num / d >= base) d *= base;
-    while (d != 0) {
-        int dgt = num / d;
-        num %= d;
-        d /= base;
-        if (n || dgt > 0 || d == 0) {
-            *bf++ = dgt + (dgt < 10 ? '0' : (uc ? 'A' : 'a') - 10);
-            ++n;
-        }
-    }
-    *bf = 0;
-}
-
-static void i2a(int num, char* bf) {
-    if (num < 0) {
-        num   = -num;
-        *bf++ = '-';
-    }
-    ui2a(num, 10, 0, bf);
-}
-
-static int a2d(char ch) {
-    if (ch >= '0' && ch <= '9')
-        return ch - '0';
-    else if (ch >= 'a' && ch <= 'f')
-        return ch - 'a' + 10;
-    else if (ch >= 'A' && ch <= 'F')
-        return ch - 'A' + 10;
-    else
-        return -1;
-}
-
-static char a2i(char ch, const char** src, int base, int* nump) {
-    const char* p   = *src;
-    int         num = 0;
-    int         digit;
-    while ((digit = a2d(ch)) >= 0) {
-        if (digit > base) break;
-        num = num * base + digit;
-        ch  = *p++;
-    }
-    *src  = p;
-    *nump = num;
-    return ch;
-}
-
-static void putchw(void* putp, putcf putf, int n, char z, char* bf) {
-    char  fc = z ? '0' : ' ';
-    char  ch;
-    char* p = bf;
-    while (*p++ && n > 0) n--;
-    while (n-- > 0) putf(putp, fc);
-    while ((ch = *bf++)) putf(putp, ch);
-}
-
-void tfp_format(void* putp, putcf putf, const char* fmt, va_list va) {
-    // This used to handle max of 12, but binary support jumps this to at least 32
-    char bf[36];
-
-    char ch;
-
-    while ((ch = *(fmt++))) {
-        if (ch != '%')
-            putf(putp, ch);
-        else {
-            char lz = 0;
-#ifdef PRINTF_LONG_SUPPORT
-            char lng = 0;
-#endif
-            int w = 0;
-            ch    = *(fmt++);
-            if (ch == '0') {
-                ch = *(fmt++);
-                lz = 1;
-            }
-            if (ch >= '0' && ch <= '9') {
-                ch = a2i(ch, &fmt, 10, &w);
-            }
-#ifdef PRINTF_LONG_SUPPORT
-            if (ch == 'l') {
-                ch  = *(fmt++);
-                lng = 1;
-            }
-#endif
-            switch (ch) {
-                case 0:
-                    goto abort;
-                case 'u': {
-#ifdef PRINTF_LONG_SUPPORT
-                    if (lng)
-                        uli2a(va_arg(va, unsigned long int), 10, 0, bf);
-                    else
-#endif
-                        ui2a(va_arg(va, unsigned int), 10, 0, bf);
-                    putchw(putp, putf, w, lz, bf);
-                    break;
-                }
-                case 'd': {
-#ifdef PRINTF_LONG_SUPPORT
-                    if (lng)
-                        li2a(va_arg(va, unsigned long int), bf);
-                    else
-#endif
-                        i2a(va_arg(va, int), bf);
-                    putchw(putp, putf, w, lz, bf);
-                    break;
-                }
-                case 'x':
-                case 'X':
-#ifdef PRINTF_LONG_SUPPORT
-                    if (lng)
-                        uli2a(va_arg(va, unsigned long int), 16, (ch == 'X'), bf);
-                    else
-#endif
-                        ui2a(va_arg(va, unsigned int), 16, (ch == 'X'), bf);
-                    putchw(putp, putf, w, lz, bf);
-                    break;
-                case 'c':
-                    putf(putp, (char)(va_arg(va, int)));
-                    break;
-                case 's':
-                    putchw(putp, putf, w, 0, va_arg(va, char*));
-                    break;
-                case 'b':
-#ifdef PRINTF_LONG_SUPPORT
-                    if (lng)
-                        uli2a(va_arg(va, unsigned long int), 2, 0, bf);
-                    else
-#endif
-                        ui2a(va_arg(va, unsigned int), 2, 0, bf);
-                    putchw(putp, putf, w, lz, bf);
-                    break;
-                case '%':
-                    putf(putp, ch);
-                default:
-                    break;
-            }
-        }
-    }
-abort:;
-}
-
-void init_printf(void* putp, void (*putf)(void*, char)) {
-    stdout_putf = putf;
-    stdout_putp = putp;
-}
-
-int tfp_printf(const char* fmt, ...) {
-    va_list va;
-    va_start(va, fmt);
-    tfp_format(stdout_putp, stdout_putf, fmt, va);
-    va_end(va);
-
-    return 1;
-}
-
-static void putcp(void* p, char c) { *(*((char**)p))++ = c; }
-
-int tfp_sprintf(char* s, const char* fmt, ...) {
-    va_list va;
-    va_start(va, fmt);
-    tfp_format(&s, putcp, fmt, va);
-    putcp(&s, 0);
-    va_end(va);
-
-    return 1;
-}
diff --git a/tmk_core/common/chibios/printf.h b/tmk_core/common/chibios/printf.h
deleted file mode 100644
index 775459e1e8..0000000000
--- a/tmk_core/common/chibios/printf.h
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * found at: http://www.sparetimelabs.com/tinyprintf/tinyprintf.php
- * and:      http://www.sparetimelabs.com/printfrevisited/printfrevisited.php
- */
-
-/*
-File: printf.h
-
-Copyright (C) 2004  Kustaa Nyholm
-
-This library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
-License as published by the Free Software Foundation; either
-version 2.1 of the License, or (at your option) any later version.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-See the GNU Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public
-License along with this library; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-
-This library is realy just two files: 'printf.h' and 'printf.c'.
-
-They provide a simple and small (+200 loc) printf functionality to
-be used in embedded systems.
-
-I've found them so usefull in debugging that I do not bother with a
-debugger at all.
-
-They are distributed in source form, so to use them, just compile them
-into your project.
-
-Two printf variants are provided: printf and sprintf.
-
-The formats supported by this implementation are: 'd' 'u' 'c' 's' 'x' 'X'.
-
-Zero padding and field width are also supported.
-
-If the library is compiled with 'PRINTF_SUPPORT_LONG' defined then the
-long specifier is also
-supported. Note that this will pull in some long math routines (pun intended!)
-and thus make your executable noticably longer.
-
-The memory foot print of course depends on the target cpu, compiler and
-compiler options, but a rough guestimate (based on a H8S target) is about
-1.4 kB for code and some twenty 'int's and 'char's, say 60 bytes of stack space.
-Not too bad. Your milage may vary. By hacking the source code you can
-get rid of some hunred bytes, I'm sure, but personally I feel the balance of
-functionality and flexibility versus  code size is close to optimal for
-many embedded systems.
-
-To use the printf you need to supply your own character output function,
-something like :
-
-    void putc ( void* p, char c)
-        {
-        while (!SERIAL_PORT_EMPTY) ;
-        SERIAL_PORT_TX_REGISTER = c;
-        }
-
-Before you can call printf you need to initialize it to use your
-character output function with something like:
-
-    init_printf(NULL,putc);
-
-Notice the 'NULL' in 'init_printf' and the parameter 'void* p' in 'putc',
-the NULL (or any pointer) you pass into the 'init_printf' will eventually be
-passed to your 'putc' routine. This allows you to pass some storage space (or
-anything realy) to the character output function, if necessary.
-This is not often needed but it was implemented like that because it made
-implementing the sprintf function so neat (look at the source code).
-
-The code is re-entrant, except for the 'init_printf' function, so it
-is safe to call it from interupts too, although this may result in mixed output.
-If you rely on re-entrancy, take care that your 'putc' function is re-entrant!
-
-The printf and sprintf functions are actually macros that translate to
-'tfp_printf' and 'tfp_sprintf'. This makes it possible
-to use them along with 'stdio.h' printf's in a single source file.
-You just need to undef the names before you include the 'stdio.h'.
-Note that these are not function like macros, so if you have variables
-or struct members with these names, things will explode in your face.
-Without variadic macros this is the best we can do to wrap these
-fucnction. If it is a problem just give up the macros and use the
-functions directly or rename them.
-
-For further details see source code.
-
-regs Kusti, 23.10.2004
-*/
-
-#ifndef __TFP_PRINTF__
-#define __TFP_PRINTF__
-
-#include <stdarg.h>
-
-void init_printf(void* putp, void (*putf)(void*, char));
-
-int tfp_printf(const char* fmt, ...);
-int tfp_sprintf(char* s, const char* fmt, ...);
-
-void tfp_format(void* putp, void (*putf)(void*, char), const char* fmt, va_list va);
-
-#define printf tfp_printf
-#define sprintf tfp_sprintf
-
-#endif
diff --git a/tmk_core/common/print.h b/tmk_core/common/print.h
index 04ca558109..1c77236212 100644
--- a/tmk_core/common/print.h
+++ b/tmk_core/common/print.h
@@ -72,9 +72,7 @@ extern "C"
 
 #    elif defined(PROTOCOL_CHIBIOS) /* PROTOCOL_CHIBIOS */
 
-#        ifndef TERMINAL_ENABLE
-#            include "chibios/printf.h"
-#        endif
+#        include "printf.h"  // lib/printf/printf.h
 
 #        ifdef USER_PRINT /* USER_PRINT */
 
@@ -89,7 +87,6 @@ extern "C"
 #            define uprintf printf
 
 #        else /* NORMAL PRINT */
-
 // Create user & normal print defines
 #            define print(s) printf(s)
 #            define println(s) printf(s "\r\n")
diff --git a/tmk_core/protocol/chibios/main.c b/tmk_core/protocol/chibios/main.c
index 61665eb6f4..7d32c16ed8 100644
--- a/tmk_core/protocol/chibios/main.c
+++ b/tmk_core/protocol/chibios/main.c
@@ -158,9 +158,6 @@ int main(void) {
     /* Init USB */
     init_usb_driver(&USB_DRIVER);
 
-    /* init printf */
-    init_printf(NULL, sendchar_pf);
-
 #ifdef MIDI_ENABLE
     setup_midi();
 #endif
diff --git a/tmk_core/protocol/chibios/usb_main.c b/tmk_core/protocol/chibios/usb_main.c
index ecc83d9ecc..65bd291bec 100644
--- a/tmk_core/protocol/chibios/usb_main.c
+++ b/tmk_core/protocol/chibios/usb_main.c
@@ -796,9 +796,8 @@ int8_t sendchar(uint8_t c) {
 }
 #endif /* CONSOLE_ENABLE */
 
-void sendchar_pf(void *p, char c) {
-    (void)p;
-    sendchar((uint8_t)c);
+void _putchar(char character) {
+    sendchar(character);
 }
 
 #ifdef RAW_ENABLE
diff --git a/tmk_core/protocol/chibios/usb_main.h b/tmk_core/protocol/chibios/usb_main.h
index 17041b4f2f..94baf9b35e 100644
--- a/tmk_core/protocol/chibios/usb_main.h
+++ b/tmk_core/protocol/chibios/usb_main.h
@@ -87,6 +87,4 @@ void console_flush_output(void);
 
 #endif /* CONSOLE_ENABLE */
 
-void sendchar_pf(void *p, char c);
-
 #endif /* _USB_MAIN_H_ */