Implemented place holder for fx language

TODO.md

@@ -4,6 +4,7 @@
 - G1N (???);
 - G3L (languages for cg calculators);
 - G3M (like G1M?);
+- G1K/G3K (keys?).
 
 ## Correct the parsing of these formats
 - G1M (BCD, other subtypes);

include/libg1m/format.h

@@ -25,11 +25,14 @@
  *	MCS, e-acts), some data that will be useful for the MCS type, and some
  *	magic and control bytes.
  *
+ *	For some reason, this StandardHeader is INVERTED on every file it's on,
+ *	you will have to apply a NOT operation on its bytes for it to make sense.
+ *
  *	Keep in mind that, everywhere in the header, multi-bytes integers
  *	are BIG ENDIAN.
  *
  *	The LSB is the Least Significant Byte: once adapted to the host endianness,
- *	it can simply be obtained bitwise-AND-ing with 0xff. */
+ *	it can simply be obtained by bitwise-AND-ing with 0xff. */
 
 struct standard_header {
 	/* the file identifier - see below */
@@ -79,9 +82,12 @@ enum g1m_main_id {
 	g1m_mid_ly755,
 };
 
-/*	Here are USBPower types: */
+/*	Each main ID have their own types. Here are the USBPower types: */
 
 enum g1m_usbpower_type {
+	/* fx language file */
+	g1m_usbpower_type_lang = 0x12,
+
 	/* fx-CG add-in */
 	g1m_usbpower_type_addin_cg = 0x2c,
 

include/libg1m/format/picture.h

@@ -13,7 +13,7 @@
 
 /*	These are pictures for fx-CG. They only have one part.
  *	This mysteries over this format have been unraveled by many, but I'm using
- *	Simon Lothar's and Kerm Martian's documentations.
+ *	Simon Lothar's documentation and Kerm Martian's articles.
  *
  *	Some color depth things: */
 
@@ -90,7 +90,7 @@ struct g3p_imageheader {
  *
  *	Which, simplified and with our structures, is:
  *
- *		std.obfuscated + 8 != (std.filesize & 0xff00) >> 8
+ *		(std.obfuscated + 8) & 0xff != (std.filesize & 0xff00) >> 8
  *
  *	then the deflated image is encrypted.
  *

include/libg1m/internals.h

@@ -64,6 +64,7 @@ int g1m_parse_eact(g1m_t * handle, FILE *stream);
 int g1m_parse_addin(g1m_t *handle, FILE *stream);
 int g1m_parse_addin_cg(g1m_t *handle, FILE *stream,
 	struct standard_header *std);
+int g1m_parse_lang(g1m_t *handle, FILE *stream);
 int g1m_parse_lang_cg(g1m_t *handle, FILE *stream);
 
 /* ************************************************************************** */

src/parse/lang.c

@@ -9,9 +9,26 @@
 /* ************************************************************************** */
 #include <libg1m/internals.h>
 
+/**
+ *	g1m_parse_lang:
+ *	Parse fx language files.
+ *
+ *	@arg	handle		the libg1m handle.
+ *	@arg	stream		the stream to parse from.
+ *	@return				the error code (0 if ok).
+ */
+
+int g1m_parse_lang(g1m_t *handle, FILE *stream)
+{
+	(void)handle;
+	(void)stream;
+	log_info("Language type isn't managed yet.");
+	return (0);
+}
+
 /**
  *	g1m_parse_lang_cg:
- *	Parse fx-CG lang files.
+ *	Parse fx-CG language files.
  *
  *	@arg	handle		the libg1m handle.
  *	@arg	stream		the stream to parse from.
@@ -22,6 +39,6 @@ int g1m_parse_lang_cg(g1m_t *handle, FILE *stream)
 {
 	(void)handle;
 	(void)stream;
-	log_info("Lang type isn't managed yet.");
+	log_info("Language type isn't managed yet.");
 	return (0);
 }

src/parse/main.c

@@ -86,6 +86,9 @@ int g1m_parse(g1m_t *handle, FILE *stream)
 	switch (main_id) {
 	case g1m_mid_usbpower:
 		switch (hd.type) {
+		case g1m_usbpower_type_lang:
+			handle->type = g1m_type_lang;
+			return (g1m_parse_lang(handle, stream));
 		case g1m_usbpower_type_addin:
 			handle->type = g1m_type_addin;
 			return (g1m_parse_addin(handle, stream));

src/parse/picture.c

@@ -59,8 +59,8 @@ int g1m_parse_g3p(g1m_t *handle, FILE *stream,
 	ihd.data_size = be32toh(ihd.data_size);
 
 	/* check some little things */
-	int is_obfuscated = ((uint8_t)(std->obfuscated + 8)
-		!= (uint8_t)((std->filesize & 0xff00) >> 8));
+	int is_obfuscated =
+		(std->obfuscated + 8) & 0xff != ((std->filesize & 0xff00) >> 8);
 	int has_footer = 1; /* might change? */
 	size_t deflated_image_size = ihd.data_size - has_footer * 0x4;