Implement payload compression

tools/bin2c/Makefile

@@ -0,0 +1,16 @@
+NATIVE_CC ?= gcc
+
+ifeq (, $(shell which $(NATIVE_CC) 2>/dev/null))
+$(error "Native GCC is missing. Please install it first. If it's path is custom, set it with export NATIVE_CC=<path to native gcc toolchain>")
+endif
+
+.PHONY: all clean
+
+all: bin2c
+	@echo > /dev/null
+
+clean:
+	@rm -f bin2c
+
+bin2c: bin2c.c
+	@$(NATIVE_CC) -o $@ bin2c.c

tools/bin2c/bin2c.c

@@ -0,0 +1,83 @@
+/*
+ * This is bin2c program, which allows you to convert binary file to
+ * C language array, for use as embedded resource, for instance you can
+ * embed graphics or audio file directly into your program.
+ * This is public domain software, use it on your own risk.
+ * Contact Serge Fukanchik at fuxx@mail.ru  if you have any questions.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+/* Replace . with _ */
+char*
+make_ident ( char* name )
+{
+  char* ret;
+  char* p;
+
+  ret = strdup ( name );
+
+  for ( p = ret; p[0]; p++ )
+  {
+    if ( !isalnum ( p[0] ) ) p[0] = '_';
+  }
+  return ret;
+}
+
+int
+main ( int argc, char* argv[] )
+{
+  unsigned char buf[BUFSIZ];
+  char* ident;
+  FILE *fd;
+  size_t size, i, total, blksize = BUFSIZ;
+  int need_comma = 0;
+
+  if ( argc != 2 )
+  {
+    fprintf ( stderr, "Usage: %s binary_file > output_file\n", argv[0] );
+    return -1;
+  }
+
+  fd = fopen ( argv[1], "rb" );
+  if ( fd == NULL )
+  {
+    fprintf ( stderr, "%s: can't open %s for reading\n", argv[0], argv[1] );
+    return -1;
+  }
+
+  fseek(fd, 0, SEEK_END);
+  size = ftell(fd);
+  rewind(fd);
+
+  ident = make_ident ( argv[1] );
+
+  printf ( "static const unsigned char __attribute__((section (\"._%s\"))) %s[] = {", ident, ident );
+  for ( total = 0; total < size; )
+  {
+    if ( size - total < blksize ) blksize = size - total;
+    if ( fread ( buf, 1, blksize, fd ) != blksize )
+    {
+      fprintf ( stderr, "%s: file read error\n", argv[0] );
+      return -1;
+    }
+    for ( i = 0; i < blksize; i++ )
+    {
+      if ( need_comma ) printf ( ", " );
+      else need_comma = 1;
+      if ( ( total % 11 ) == 0 ) printf ( "\n\t" );
+      printf ( "0x%.2x", buf[i] );
+      total++;
+    }
+  }
+  printf ( "\n};\n" );
+
+  fclose ( fd );
+  free ( ident );
+
+  return 0;
+}