From f40223504106ffdff83fbf9a0af16abf0eceb993 Mon Sep 17 00:00:00 2001
From: Max Christian Pohle
Date: Thu, 5 May 2016 16:01:15 +0200
Subject: simple and failsafe reader

this simple library is used to separate file I/O functions from other
tasks which can easily cause race conditions.
---
 Makefile      | 26 ++++++++++++++++++++++++++
 file_reader.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 file_reader.h | 21 +++++++++++++++++++++
 3 files changed, 89 insertions(+)
 create mode 100755 Makefile
 create mode 100755 file_reader.c
 create mode 100644 file_reader.h

diff --git a/Makefile b/Makefile
new file mode 100755
index 0000000..a4ef8a1
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+CFLAGS=-Wall -g -shared -fPIC
+
+rebuild: clean all
+
+all: file_reader.o file_reader.a file_reader.so 
+	$(CC) -Wall -o file_reader ./file_reader.o
+	rm -f file_reader.o
+
+clean:
+	rm -f file_reader{.so,.a,.o,}
+
+test: all
+	./main
+
+
+
+#.o:
+#	cc -shared -fPIC -c -o $@ $< 
+
+%.so: %.o
+	$(CC) $(INCLUDES) $(CFLAGS) -o $@ $<
+
+%.a: %.o
+	ar rcs $@ $<
+
+
diff --git a/file_reader.c b/file_reader.c
new file mode 100755
index 0000000..eea7761
--- /dev/null
+++ b/file_reader.c
@@ -0,0 +1,42 @@
+#include "file_reader.h"
+
+#define BUFFER_SIZE 16384
+
+File* file_open(const char* filename)
+{
+  File* retval = malloc(sizeof(File));
+  retval->name = filename;
+  retval->data = malloc(0);
+  retval->size = 0;
+  FILE* file = fopen(filename, "rb");
+  if(file)
+  {
+    do
+    {
+      retval->data = realloc(retval->data, retval->size + BUFFER_SIZE);
+      retval->size += fread(&retval->data[retval->size], 1, BUFFER_SIZE, file);
+    } while(!feof(file));
+    retval->data = realloc(retval->data, retval->size);
+    fclose(file);
+    return retval;
+  }
+  else
+  {
+    perror(filename);
+    return NULL;
+  }
+}
+
+void file_close(File* file)
+{
+  free(file->data);
+  free(file);
+}
+
+int main()
+{
+  File* file = file_open("strict.dtd");
+  puts(file->data);
+  file_close(file);
+  return 0;
+}
diff --git a/file_reader.h b/file_reader.h
new file mode 100644
index 0000000..6c68618
--- /dev/null
+++ b/file_reader.h
@@ -0,0 +1,21 @@
+#ifndef FILE_READER
+#define FILE_READER
+
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct
+{
+  const char* name;
+  char* data;
+  size_t size;
+} File;
+
+File* file_open(const char* filename);
+void file_close(File* file);
+
+#define file_getName(FILE) FILE->name
+#define file_getSize(FILE) FILE->size
+#define file_toChar(FILE) FILE->data
+
+#endif
-- 
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