From 451b1d1b6b4943f4df5bc7c509bd14ceefe017d1 Mon Sep 17 00:00:00 2001
From: depsterr <depsterr@protonmail.com>
Date: Sat, 11 Dec 2021 14:26:39 +0100
Subject: [PATCH] initial commit

---
 .gitignore |  2 ++
 Makefile   | 18 ++++++++++
 src/dbg.h  | 31 +++++++++++++++++
 src/main.c |  5 +++
 src/util.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/util.h | 15 +++++++++
 6 files changed, 168 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 src/dbg.h
 create mode 100644 src/main.c
 create mode 100644 src/util.c
 create mode 100644 src/util.h

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9bb5861
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.o
+secd
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..85ca0a5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,18 @@
+.POSIX:
+.PHONY: all clean
+DEPS=src/main.o src/util.o
+
+all: secd
+
+secd: $(DEPS)
+	$(CC) $(CFLAGS) $(DEPS) -o secd
+
+run: secd
+	@./secd
+
+clean:
+	rm -f $(DEPS)
+
+.SUFFIXES: .c .o
+.c.o:
+	$(CC) -c $(CFLAGS) $< -o $@
diff --git a/src/dbg.h b/src/dbg.h
new file mode 100644
index 0000000..fc9b72b
--- /dev/null
+++ b/src/dbg.h
@@ -0,0 +1,31 @@
+#ifndef __DBG_H
+#define __DBG_H
+
+#include <stdio.h>
+
+#ifdef ENABLE_DBG_H
+
+# define DEBUG(fmt, ...) fprintf(stderr, "[%s:%s:%d]: " fmt "\n", \
+	__FILE__, __func__, __LINE__, __VA_ARGS__)
+
+# define VALFMTS "[%s:%s():%d] %s: "
+# define VALFMTP "\n"
+
+# define VAL(X) fprintf(stderr, _Generic((X), \
+    char:           VALFMTS "%c"   VALFMTP, \
+    unsigned char:  VALFMTS "%hhu" VALFMTP, \
+    short:          VALFMTS "%h"   VALFMTP, \
+    unsigned short: VALFMTS "%hu"  VALFMTP, \
+    int:            VALFMTS "%d"   VALFMTP, \
+    unsigned int:   VALFMTS "%u"   VALFMTP, \
+    long:           VALFMTS "%l"   VALFMTP, \
+    unsigned long:  VALFMTS "%lu"  VALFMTP, \
+    char*:          VALFMTS "'%s'" VALFMTP, \
+    default:        VALFMTS "0x%x" VALFMTP\
+	), __FILE__, __func__, __LINE__, #X, X)
+#else
+# define DEBUG(...)
+# define VAL(_)
+#endif
+
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..5cc36eb
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+#include "dbg.h"
+
+int main(int argc, char** argv) {
+}
diff --git a/src/util.c b/src/util.c
new file mode 100644
index 0000000..9b16e60
--- /dev/null
+++ b/src/util.c
@@ -0,0 +1,97 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+
+#include "dbg.h"
+#include "util.h"
+
+#ifdef POSIX
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#endif
+
+// print message to stderr and then exit
+void die(const char* s) {
+	fprintf(stderr, "FATAL ERROR: %s.\n", s);
+	exit(1);
+}
+
+// print perror message to stderr and then exit
+void diePerror(const char* s) {
+	perror(s);
+	exit(1);
+}
+
+// malloc which dies on failure
+void* xmalloc(size_t bytes) {
+	void* p = malloc(bytes);
+	GUARD(p);
+	return p;
+}
+
+// realloc which dies on failure
+void* xrealloc(void* p, size_t bytes) {
+	p = realloc(p, bytes);
+	GUARD(p);
+	return p;
+}
+
+// free which is garantueed null pointer safe
+void xfree(void* p) {
+	if (p) {
+		free(p);
+	}
+}
+
+// read the file at the given path and return a byte buffer
+// pointing to the contents of the file, the length of which
+// is stored in rsize
+uint8_t* readFile(char* path, size_t* rsize) {
+	size_t   size = 0;
+	uint8_t* buf  = 0;
+#ifdef POSIX
+	int      fd   = 0;
+
+	fd = open(path, O_RDONLY);
+	SGUARD(fd);
+
+	size = lseek(fd, 0, SEEK_END);
+	SGUARD(size);
+
+	buf = mmap(0, size, PROT_READ, MAP_PRIVATE, fd, 0);
+	SGUARD(buf);
+
+	SGUARD(close(fd));
+#else
+	FILE*    fp   = 0;
+
+	fp = fopen(path, "rb");
+	GUARD(fp);
+
+	GUARD(fseek(fp, 0, SEEK_END));
+
+	size = ftell(fp);
+
+	rewind(fp);
+
+	buf = xmalloc(size);
+
+	GUARD(fread(buf, 1, size, fp) == size);
+
+	GUARD(fclose(fp));
+#endif
+
+	*rsize = size;
+
+	return buf;
+}
+
+// free read file
+void freeFile(uint8_t* buf, size_t size) {
+#ifdef POSIX
+	SGUARD(munmap(buf, size));
+#else
+	xfree(buf);
+#endif
+}
diff --git a/src/util.h b/src/util.h
new file mode 100644
index 0000000..01c2700
--- /dev/null
+++ b/src/util.h
@@ -0,0 +1,15 @@
+#ifndef _UTIL_H
+#define _UTIL_H
+
+#define GUARD(p)  if (!p)    { diePerror(__func__); }
+#define SGUARD(p) if (p < 0) { diePerror(__func__); }
+
+#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))
+#define POSIX 
+#endif
+
+#ifdef __WIN32__
+#define WINDOWS
+#endif
+
+#endif