Joel's Projects >> make-c-array

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— make-c-array [2017/12/06 11:18] (current)
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 +====== make-c-array ======
 +This script prints binary data as an C array. This is useful for inserting binary blobs into source code. The script takes binary data in via stdin, and prints it out via stdout, so that it can work in a pipe.
 +<code>
 +#!/bin/bash
  
 +FILE=$1
 +NAME=$2
 +
 +echo "const unsigned char $NAME[] = {"
 +od -v -w8 -tx1 $FILE | cut -c8- | \
 + sed \
 + -e"s/ / 0x/g" \
 + -e"s/ 0x/, 0x/g" \
 + -e"s/^, \(.*\)/    \1/" \
 + -e"$ d" |
 + sed -e"$ !s/.*/&,/"
 +echo "};"
 +</code>
 +===Usage===
 +==File Input==
 +To print a file:
 +<code>
 + $ make-c-array in.bin Test > out.c
 +</code>
 +Where in.bin is the binary input file, Test is the name of the array, and out is the name of the C file to output to:
 +<code c>
 +const unsigned char Test[] = {
 +    0xff, 0xd8, 0xff, 0xe0, 0x00, 0x10, 0x4a, 0x46,
 +    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 +    0x00, 0x00, 0x00, 0x03, 0xff, 0xc4, 0x00, 0x14,
 +    0x00, 0x00, 0xff, 0xda, 0x00, 0x08, 0x01, 0x01,
 +    0x00, 0x00, 0x3f, 0x00, 0x37, 0xff, 0xd9
 +};
 +</code>
 +==Pipe Input==
 +make-c-array can also take an input from stdin:
 +<code>
 + $ echo "Binary Test Data" | make-c-array - Hello > out.c
 +</code>
 +Result:
 +<code c>
 +const unsigned char Test[] = {
 +    0x42, 0x69, 0x6e, 0x61, 0x72, 0x79, 0x20, 0x54,
 +    0x65, 0x73, 0x74, 0x20, 0x44, 0x61, 0x74, 0x61,
 +    0x0a
 +};
 +</code>
make-c-array.txt ยท Last modified: 2017/12/06 11:18 (external edit)