From df8f2e4bd06bf153a4f604fd8759b2212fe72a7a Mon Sep 17 00:00:00 2001
From: lvlhead <lvlhe@d>
Date: Tue, 23 Jul 2024 10:31:45 -0700
Subject: [PATCH] Add include guards to printf library to reduce compiled code
 to what we use

---
 external/printf/printf.c | 19 +++++++++++++------
 external/printf/printf.h |  8 ++++----
 printf_config.h          |  1 +
 3 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/external/printf/printf.c b/external/printf/printf.c
index 93029741c..da9bc2545 100644
--- a/external/printf/printf.c
+++ b/external/printf/printf.c
@@ -643,6 +643,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
       }
     }
 
+#ifndef PRINTF_VOXLESS
     // evaluate length field
     switch (*format) {
       case 'l' :
@@ -653,6 +654,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
           format++;
         }
         break;
+
       case 'h' :
         flags |= FLAGS_SHORT;
         format++;
@@ -661,6 +663,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
           format++;
         }
         break;
+
 #if defined(PRINTF_SUPPORT_PTRDIFF_T)
       case 't' :
         flags |= (sizeof(ptrdiff_t) == sizeof(long) ? FLAGS_LONG : FLAGS_LONG_LONG);
@@ -678,6 +681,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
       default :
         break;
     }
+#endif // PRINTF_VOXLESS
 
     // evaluate specifier
     switch (*format) {
@@ -754,6 +758,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
         format++;
         break;
       }
+
 #if defined(PRINTF_SUPPORT_FLOAT)
       case 'f' :
       case 'F' :
@@ -818,7 +823,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
         format++;
         break;
       }
-
+#ifndef PRINTF_VOXLESS
       case 'p' : {
         width = sizeof(void*) * 2U;
         flags |= FLAGS_ZEROPAD | FLAGS_UPPERCASE;
@@ -836,7 +841,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
         format++;
         break;
       }
-
+#endif // PRINTF_VOXLESS
       case '%' :
         out('%', buffer, idx++, maxlen);
         format++;
@@ -858,7 +863,7 @@ static int _vsnprintf(out_fct_type out, char* buffer, const size_t maxlen, const
 
 
 ///////////////////////////////////////////////////////////////////////////////
-
+#ifndef PRINTF_VOXLESS
 int printf_(const char* format, ...)
 {
   va_list va;
@@ -868,7 +873,7 @@ int printf_(const char* format, ...)
   va_end(va);
   return ret;
 }
-
+#endif
 
 int sprintf_(char* buffer, const char* format, ...)
 {
@@ -889,12 +894,13 @@ int snprintf_(char* buffer, size_t count, const char* format, ...)
   return ret;
 }
 
-
+#ifndef PRINTF_VOXLESS
 int vprintf_(const char* format, va_list va)
 {
   char buffer[1];
   return _vsnprintf(_out_char, buffer, (size_t)-1, format, va);
 }
+#endif
 
 
 int vsnprintf_(char* buffer, size_t count, const char* format, va_list va)
@@ -902,7 +908,7 @@ int vsnprintf_(char* buffer, size_t count, const char* format, va_list va)
   return _vsnprintf(_out_buffer, buffer, count, format, va);
 }
 
-
+#ifndef PRINTF_VOXLESS
 int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...)
 {
   va_list va;
@@ -912,3 +918,4 @@ int fctprintf(void (*out)(char character, void* arg), void* arg, const char* for
   va_end(va);
   return ret;
 }
+#endif
diff --git a/external/printf/printf.h b/external/printf/printf.h
index 8f7a4c8fe..472337179 100644
--- a/external/printf/printf.h
+++ b/external/printf/printf.h
@@ -48,7 +48,7 @@ extern "C" {
  */
 void _putchar(char character);
 
-
+#ifndef PRINTF_VOXLESS
 /**
  * Tiny printf implementation
  * You have to implement _putchar if you use printf()
@@ -59,7 +59,7 @@ void _putchar(char character);
  */
 #define printf printf_
 int printf_(const char* format, ...);
-
+#endif
 
 /**
  * Tiny sprintf implementation
@@ -88,6 +88,7 @@ int  snprintf_(char* buffer, size_t count, const char* format, ...);
 int vsnprintf_(char* buffer, size_t count, const char* format, va_list va);
 
 
+#ifndef PRINTF_VOXLESS
 /**
  * Tiny vprintf implementation
  * \param format A string that specifies the format of the output
@@ -97,7 +98,6 @@ int vsnprintf_(char* buffer, size_t count, const char* format, va_list va);
 #define vprintf vprintf_
 int vprintf_(const char* format, va_list va);
 
-
 /**
  * printf with output function
  * You may use this as dynamic alternative to printf() with its fixed _putchar() output
@@ -107,7 +107,7 @@ int vprintf_(const char* format, va_list va);
  * \return The number of characters that are sent to the output function, not counting the terminating null character
  */
 int fctprintf(void (*out)(char character, void* arg), void* arg, const char* format, ...);
-
+#endif
 
 #ifdef __cplusplus
 }
diff --git a/printf_config.h b/printf_config.h
index 3e4070f41..ce68046b4 100644
--- a/printf_config.h
+++ b/printf_config.h
@@ -2,3 +2,4 @@
 #define PRINTF_DISABLE_SUPPORT_EXPONENTIAL
 #define PRINTF_DISABLE_SUPPORT_PTRDIFF_T
 #define PRINTF_DISABLE_SUPPORT_FLOAT
+#define PRINTF_VOXLESS