Diff: main.cpp

Revision:

0:9b273b2aef38

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Oct 09 08:11:14 2013 +0000
@@ -0,0 +1,233 @@
+/******************************************************************************
+ * Includes
+ *****************************************************************************/
+ 
+#include "mbed.h"
+#include "MCIFileSystem.h"
+
+/******************************************************************************
+ * Typedefs and defines
+ *****************************************************************************/
+
+typedef bool (*syncFunc)(const char* name, bool isDir);
+
+/******************************************************************************
+ * Local variables
+ *****************************************************************************/
+
+MCIFileSystem mcifs("mci");
+
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+
+/******************************************************************************
+ * Local functions
+ *****************************************************************************/
+
+static void ledShowProgress()
+{
+  static int state = 0;
+  state = (state + 1) % 2;
+  switch (state)
+  {
+    case 0:
+      myled1 = 1;
+      myled2 = 0;
+      break;
+
+    case 1:
+    default:
+      myled1 = 0;
+      myled2 = 1;
+  }
+}
+
+static void handleError(const char* msg)
+{
+  printf(msg);
+  while(true) {
+    myled1 = 1;
+    myled2 = 1;
+    wait(0.3);
+    myled1 = 0;
+    myled2 = 0;
+    wait(0.3);
+  }
+}
+
+static bool recursiveProcessFS(char* buff, const char* name, syncFunc func, bool adding)
+{
+  uint32_t len = strlen(buff);
+  if (len > 0) {
+    if (buff[len - 1] != '/') {
+      buff[len++] = '/';
+      buff[len] = '\0';
+    }
+  }
+  strcat(buff, name);
+  len += strlen(name);
+  
+  if (len > 60) {
+    // ugly fix to avoid crashes that occurs when file name is larger than buffer 
+    // in FATFileSystem.
+    printf("skipped:   %s\n", buff);
+    return true;
+  }
+
+  DIR *d = opendir(buff);
+  bool result = true; // success
+  if (d != NULL) {
+    if (adding) {
+      // when processing in adding mode folders must be created before it's content
+      result = func(buff, true);
+    }
+    struct dirent *p;
+    while (result && ((p = readdir(d)) != NULL)) {
+      result = recursiveProcessFS(buff, p->d_name, func, adding);
+      buff[len] = '\0';
+    }
+    closedir(d);
+    if (result && !adding) {
+      // when processing in removing mode folders must be deleted after it's content
+      result = func(buff, true);
+    }
+  } else {
+    // a file
+    result = func(buff, false);
+  }
+  return result;
+}
+
+static uint32_t fileLen(FILE* f)
+{
+  uint32_t pos = ftell(f);
+  fseek(f, 0, SEEK_END);
+  uint32_t size = ftell(f);
+  fseek(f, pos, SEEK_SET);
+  return size;
+}
+
+static bool copyFH(FILE* fSrc, FILE* fDst)
+{
+  char buff[512];
+  uint32_t left = fileLen(fSrc);
+  uint32_t num;
+  uint32_t chunk;
+
+  fseek(fSrc, 0, SEEK_SET);
+  do {
+    chunk = (left < 512) ? left : 512;
+    num = fread(buff, 1, chunk, fSrc);
+    if (num > 0) {
+      uint32_t tmp = fwrite(buff, 1, num, fDst);
+      if (tmp != num) {
+        // failed to write
+        return false;
+      }
+      left -= num;
+      ledShowProgress();
+    }
+  } while(num > 0 && left > 0);
+
+  // copied entire file
+  return true;
+}
+
+static bool copy(const char* fnameSrc, const char* fnameDest)
+{
+  FILE* fhSrc = NULL;
+  FILE* fhDest = NULL;
+  bool success = false;
+  
+  do {
+    fhSrc = fopen(fnameSrc, "r");
+    if (fhSrc == NULL) {
+      break;
+    }
+    
+    fhDest = fopen(fnameDest, "w");
+    if (fhDest == NULL) {
+      break;
+    }
+    
+    if (!copyFH(fhSrc, fhDest)) {
+      break;
+    }
+    
+    success = true;
+  } while (false);
+  
+  if (fhSrc != NULL) {
+    fclose(fhSrc);
+  }
+  if (fhDest != NULL) {
+    fclose(fhDest);
+  }
+  
+  return success;
+}
+
+static bool list(const char* name, bool isDir)
+{
+  if (isDir) {
+    printf("d:         %s\n", name);
+  } else {
+    FILE* f = fopen(name, "r");
+    if (f != NULL) {
+      uint32_t len = fileLen(f);
+      printf("f: %7u %s\n", len, name);
+      fclose(f);
+    } else {
+      printf("f:     ??? %s\n", name);
+    }
+  }
+  return true;
+}
+
+static void recursiveList(const char* dirname)
+{
+  printf("\nRecursive list of file and folders in %s\n", dirname);
+  char* buff = (char*)malloc(512);
+  if (buff != NULL)
+  {
+    buff[0] = '\0';
+    recursiveProcessFS(buff, dirname, list, true);
+    free(buff);
+  }
+}
+
+static void testAppend(const char* filename)
+{
+    FILE *fp = fopen(filename, "a");
+    if (fp != NULL) {
+        fprintf(fp, "Hello World!");
+        fclose(fp);
+    }
+}
+
+/******************************************************************************
+ * Main function
+ *****************************************************************************/
+
+int main()
+{
+  printf("\n-----------------\n\nWelcome to the MCI file system example...\n");
+  
+  if (!mcifs.cardInserted()) {
+    printf("Please insert a SD/MMC card...\n");
+    while (!mcifs.cardInserted()) {
+      wait(0.5);
+    }
+    printf("Card detected!\n");
+  }
+
+  recursiveList("/mci/");
+
+  copy("/mci/expanding.txt", "/mci/expanding.old");
+  testAppend("/mci/expanding.txt");
+
+  recursiveList("/mci/");
+  
+  handleError("Program completed!\n");
+}
+