Moved scope of 'buffer' to main.

main.c

@@ -28,6 +28,9 @@ void disp_pldheader(struct PldHeader *x) {
 }
 
 bool read_pldheader(const char *buffer) {
+    if (buffer == NULL) {
+        return false;
+    }
     int32_t *n = (int32_t*)buffer;
     struct PldHeader *ph      = (struct PldHeader*)malloc(
         sizeof(struct PldHeader)
@@ -50,9 +53,8 @@ bool read_pldheader(const char *buffer) {
     return true;
 }
 
-bool readpld(const char *fname) {
+bool readpld(const char *fname, char *buf) {
     FILE *f           = fopen(fname, "rb");
-    char *buffer      = NULL;
     unsigned int size = 0; // number of elements to buffer;
     unsigned int rcnt = 0; // number of char's read by fread(...)
     if (f == NULL) {
@@ -63,31 +65,32 @@ bool readpld(const char *fname) {
     fseek(f, 0, SEEK_END);
     size = ftell(f);
     rewind(f);
-    buffer = (char*)malloc(sizeof(char) * size);
-    if (buffer == NULL) {
+    buf = (char*)malloc(sizeof(char) * size);
+    if (buf == NULL) {
         perror("Error 2: ");
-        free(buffer);
+        free(buf);
         return false;
     }
-    rcnt = fread(buffer, sizeof(char), size, f);
+    rcnt = fread(buf, sizeof(char), size, f);
     if (rcnt < size) {
         perror("Error 3: ");
-        free(buffer);
+        free(buf);
         return false;
     }
-    read_pldheader(buffer);
+    read_pldheader(buf);
     fclose(f);
-    free(buffer);
     return true;
 }
 
 int main(int argc, char ** argv) {
-    char *filename = argv[1];
-    bool status  = readpld(filename);
+    char *filename  = argv[1];
+    char *filedata    = NULL;
+    bool status     = readpld(filename, filedata);
     if (status) {
         printf("Read OK");
     } else {
         printf("Read not-OK");
     }
+    free(filedata);
     return 0;
 }