updated some io stuff

3 files changed, 18 insertions, 7 deletions

diff --git a/src/config.c b/src/config.c
index 46beca7..2fd4455 100644
--- a/src/config.c
+++ b/src/config.c
@@ -4,6 +4,7 @@
 int _print_type = 0;
 int _max_depth = 2;
 int _start_nl_at = 3;
+int _file_malloc_chunk = 512;
 
 int get_config_map(const char* key){
   for(int i = 0; config_map[i].key != NULL; i++){
diff --git a/src/config.h b/src/config.h
index 1d45cad..15a4342 100644
--- a/src/config.h
+++ b/src/config.h
@@ -4,6 +4,7 @@
 extern int _print_type;
 extern int _max_depth;
 extern int _start_nl_at;
+extern int _file_malloc_chunk;
 
 struct str_to_int {
   const char* key;
@@ -11,6 +12,7 @@ struct str_to_int {
 };
 
 static struct str_to_int config_map[] = {
+  {"file_chunksize", &_file_malloc_chunk},
   {"print_type", &_print_type},
   {"max_depth", &_max_depth},
   {"start_nl_at", &_start_nl_at},
diff --git a/src/io.c b/src/io.c
index 9b84804..70771b6 100644
--- a/src/io.c
+++ b/src/io.c
@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include "io.h"
 #include "stdlib.h"
 #include "stdio.h"
@@ -10,18 +11,25 @@ int l_readfile(lua_State* L){
   char* a = (char*)luaL_checklstring(L, 1, &len);
 
   FILE *fp;
-  const uint64_t chunk_iter = 512;
-  uint64_t chunk = 512;
+  const uint64_t chunk_iter = _file_malloc_chunk;
+  uint64_t chunk = chunk_iter;
   uint64_t count = 0;
-  char* out = malloc(chunk);
-  
+
+  if(access(a, F_OK)) {
+    p_fatal("file not found");
+  }
+  if(access(a, R_OK)){
+    p_fatal("missing permissions");
+  }
+
   fp = fopen(a, "r");
-  
+  char* out = malloc(chunk);
+    
   for(;;){
-    char ch = fgetc(fp);   
+    char ch = fgetc(fp);
     if(ch==EOF) break;
     
-    if(count > chunk){
+    if(count >= chunk){
       chunk += chunk_iter;
       out = realloc(out, chunk);
     }