SD.open() new feature for creating all folders in path (#5721)

* SD.open() new feature for creating all folders in path

This PR adds to the SD.open() function option to create all folders to the file.

SD.open(const char* path, const char* mode, const bool create)

Default value of create is false.
When true folders are created.

From issue #5019

* Update vfs_api.cpp

memccpy -> memcpy

* File f = open() edit

added false for create

libraries/FFat/src/FFat.cpp

@@ -168,7 +168,7 @@ size_t F_Fat::freeBytes()
 
 bool F_Fat::exists(const char* path)
 {
-    File f = open(path, "r");
+    File f = open(path, "r",false);
     return (f == true) && !f.isDirectory();
 }
 

libraries/FS/src/FS.cpp

@@ -186,18 +186,18 @@ void File::rewindDirectory(void)
     _p->rewindDirectory();
 }
 
-File FS::open(const String& path, const char* mode)
+File FS::open(const String& path, const char* mode, const bool create)
 {
-    return open(path.c_str(), mode);
+    return open(path.c_str(), mode, create);
 }
 
-File FS::open(const char* path, const char* mode)
+File FS::open(const char* path, const char* mode, const bool create)
 {
     if (!_impl) {
         return File();
     }
 
-    return File(_impl->open(path, mode));
+    return File(_impl->open(path, mode, create));
 }
 
 bool FS::exists(const char* path)

libraries/FS/src/FS.h

@@ -89,8 +89,8 @@ class FS
 public:
     FS(FSImplPtr impl) : _impl(impl) { }
 
-    File open(const char* path, const char* mode = FILE_READ);
+    File open(const char* path, const char* mode = FILE_READ, const bool create = false);
-    File open(const String& path, const char* mode = FILE_READ);
+    File open(const String& path, const char* mode = FILE_READ, const bool create = false);
 
     bool exists(const char* path);
     bool exists(const String& path);

libraries/FS/src/FSImpl.h

@@ -53,7 +53,7 @@ protected:
 public:
     FSImpl() : _mountpoint(NULL) { }
     virtual ~FSImpl() { }
-    virtual FileImplPtr open(const char* path, const char* mode) = 0;
+    virtual FileImplPtr open(const char* path, const char* mode, const bool create) = 0;
     virtual bool exists(const char* path) = 0;
     virtual bool rename(const char* pathFrom, const char* pathTo) = 0;
     virtual bool remove(const char* path) = 0;

libraries/FS/src/vfs_api.cpp

@@ -16,7 +16,7 @@
 
 using namespace fs;
 
-FileImplPtr VFSImpl::open(const char* fpath, const char* mode)
+FileImplPtr VFSImpl::open(const char* fpath, const char* mode, const bool create)
 {
     if(!_mountpoint) {
         log_e("File system is not mounted");
@@ -37,7 +37,7 @@ FileImplPtr VFSImpl::open(const char* fpath, const char* mode)
     sprintf(temp,"%s%s", _mountpoint, fpath);
 
     struct stat st;
-    //file lound
+    //file found
     if(!stat(temp, &st)) {
         free(temp);
         if (S_ISREG(st.st_mode) || S_ISDIR(st.st_mode)) {
@@ -47,12 +47,6 @@ FileImplPtr VFSImpl::open(const char* fpath, const char* mode)
         return FileImplPtr();
     }
 
-    //file not found but mode permits creation
-    if(mode && mode[0] != 'r') {
-        free(temp);
-        return std::make_shared<VFSFileImpl>(this, fpath, mode);
-    }
-
     //try to open this as directory (might be mount point)
     DIR * d = opendir(temp);
     if(d) {
@@ -61,7 +55,51 @@ FileImplPtr VFSImpl::open(const char* fpath, const char* mode)
         return std::make_shared<VFSFileImpl>(this, fpath, mode);
     }
 
-    log_e("%s does not exist", temp);
+    //file not found but mode permits file creation without folder creation
+    if((mode && mode[0] != 'r') && (!create)){
+        free(temp);
+        return std::make_shared<VFSFileImpl>(this, fpath, mode);
+    }
+
+    ////file not found but mode permits file creation and folder creation
+    if((mode && mode[0] != 'r') && create){
+
+        char *token;
+        char *folder = (char *)malloc(strlen(fpath));
+
+        int start_index = 0;
+        int end_index = 0;
+
+        token = strchr(fpath+1,'/');
+        end_index = (token-fpath);
+
+        while (token != NULL)
+        {
+            memcpy(folder,fpath + start_index, end_index-start_index);
+            folder[end_index-start_index] = '\0';
+            
+            if(!VFSImpl::mkdir(folder))
+            {
+                log_e("Creating folder: %s failed!",folder);
+                return FileImplPtr();
+            }
+
+            token=strchr(token+1,'/');
+            if(token != NULL)
+            {
+                end_index = (token-fpath);
+                memset(folder, 0, strlen(folder));
+            }
+            
+        }
+
+        free(folder);
+        free(temp);
+        return std::make_shared<VFSFileImpl>(this, fpath, mode);
+
+    }
+
+    log_e("%s does not exist, no permits for creation", temp);
     free(temp);
     return FileImplPtr();
 }

libraries/FS/src/vfs_api.h

@@ -35,7 +35,7 @@ protected:
     friend class VFSFileImpl;
 
 public:
-    FileImplPtr open(const char* path, const char* mode) override;
+    FileImplPtr open(const char* path, const char* mode, const bool create) override;
     bool        exists(const char* path) override;
     bool        rename(const char* pathFrom, const char* pathTo) override;
     bool        remove(const char* path) override;

libraries/LittleFS/src/LittleFS.cpp

@@ -45,7 +45,7 @@ LittleFSImpl::LittleFSImpl()
 
 bool LittleFSImpl::exists(const char* path)
 {
-    File f = open(path, "r");
+    File f = open(path, "r",false);
     return (f == true);
 }
 

libraries/SPIFFS/src/SPIFFS.cpp

@@ -39,7 +39,7 @@ SPIFFSImpl::SPIFFSImpl()
 
 bool SPIFFSImpl::exists(const char* path)
 {
-    File f = open(path, "r");
+    File f = open(path, "r",false);
     return (f == true) && !f.isDirectory();
 }