From b0845528081e33a163ad50707310f848046352b4 Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Thu, 4 Mar 2021 20:36:04 +0100
Subject: [PATCH] ADDED: Config flag: SUPPORT_STANDARD_FILEIO

This new flag allows omitting stdio.h library in case of a custom implementation is used.
---
 src/config.h   |  2 ++
 src/textures.c |  1 -
 src/utils.c    | 32 ++++++++++++++++++++++++++++----
 3 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/src/config.h b/src/config.h
index ce943901d..d0c8cfdd9 100644
--- a/src/config.h
+++ b/src/config.h
@@ -203,6 +203,8 @@
 //------------------------------------------------------------------------------------
 // Module: utils - Configuration Flags
 //------------------------------------------------------------------------------------
+// Standard file io library (stdio.h) included
+#define SUPPORT_STANDARD_FILEIO
 // Show TRACELOG() output messages
 // NOTE: By default LOG_DEBUG traces not shown
 #define SUPPORT_TRACELOG            1
diff --git a/src/textures.c b/src/textures.c
index ea3bd3712..0d78c2a26 100644
--- a/src/textures.c
+++ b/src/textures.c
@@ -65,7 +65,6 @@
 #endif
 
 #include <stdlib.h>             // Required for: malloc(), free()
-#include <stdio.h>              // Required for: FILE, fopen(), fclose(), fread()
 #include <string.h>             // Required for: strlen() [Used in ImageTextEx()]
 #include <math.h>               // Required for: fabsf()
 
diff --git a/src/utils.c b/src/utils.c
index 000be3730..568c6c886 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -45,8 +45,8 @@
     #include <android/asset_manager.h>  // Required for: Android assets manager: AAsset, AAssetManager_open(), ...
 #endif
 
-#include <stdlib.h>                     // Required for: exit(), FILE, fopen(), fseek(), ftell(), fread(), fwrite(), fprintf(), fclose()
-#include <stdio.h>                      // Required for: vprintf()
+#include <stdlib.h>                     // Required for: exit()
+#include <stdio.h>                      // Required for: FILE, fopen(), fseek(), ftell(), fread(), fwrite(), fprintf(), vprintf(), fclose()
 #include <stdarg.h>                     // Required for: va_list, va_start(), va_end()
 #include <string.h>                     // Required for: strcpy(), strcat()
 
@@ -209,7 +209,7 @@ unsigned char *LoadFileData(const char *fileName, unsigned int *bytesRead)
             data = loadFileData(fileName, bytesRead);
             return data;
         }
-        
+#if defined(SUPPORT_STANDARD_FILEIO)
         FILE *file = fopen(fileName, "rb");
 
         if (file != NULL)
@@ -236,6 +236,9 @@ unsigned char *LoadFileData(const char *fileName, unsigned int *bytesRead)
             fclose(file);
         }
         else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open file", fileName);
+#else
+    TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback");
+#endif
     }
     else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid");
 
@@ -260,7 +263,7 @@ bool SaveFileData(const char *fileName, void *data, unsigned int bytesToWrite)
             saveFileData(fileName, data, bytesToWrite);
             return success;
         }
-               
+#if defined(SUPPORT_STANDARD_FILEIO)
         FILE *file = fopen(fileName, "wb");
 
         if (file != NULL)
@@ -275,6 +278,9 @@ bool SaveFileData(const char *fileName, void *data, unsigned int bytesToWrite)
             if (result == 0) success = true;
         }
         else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open file", fileName);
+#else
+    TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback");
+#endif  
     }
     else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid");
 
@@ -289,6 +295,12 @@ char *LoadFileText(const char *fileName)
 
     if (fileName != NULL)
     {
+        if (loadFileText) 
+        {
+            text = loadFileText(fileName);
+            return text;
+        }
+#if defined(SUPPORT_STANDARD_FILEIO)
         FILE *file = fopen(fileName, "rt");
 
         if (file != NULL)
@@ -319,6 +331,9 @@ char *LoadFileText(const char *fileName)
             fclose(file);
         }
         else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open text file", fileName);
+#else
+    TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback");
+#endif
     }
     else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid");
 
@@ -338,6 +353,12 @@ bool SaveFileText(const char *fileName, char *text)
 
     if (fileName != NULL)
     {
+        if (saveFileText) 
+        {
+            saveFileText(fileName, text);
+            return success;
+        }
+#if defined(SUPPORT_STANDARD_FILEIO)
         FILE *file = fopen(fileName, "wt");
 
         if (file != NULL)
@@ -351,6 +372,9 @@ bool SaveFileText(const char *fileName, char *text)
             if (result == 0) success = true;
         }
         else TRACELOG(LOG_WARNING, "FILEIO: [%s] Failed to open text file", fileName);
+#else
+    TRACELOG(LOG_WARNING, "FILEIO: Standard file io not supported, use custom file callback");
+#endif
     }
     else TRACELOG(LOG_WARNING, "FILEIO: File name provided is not valid");