#include "nilorea/n_common.h"
#include "nilorea/n_icc.h"
#include "nilorea/n_log.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <zlib.h>

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Macros
#define	PROFILE_LEN 301
	the test profile's length, odd so the WebP padding is exercised

Functions
static void	add (unsigned char buf, size_t len, const void *data, size_t n)
	Append bytes to a growing buffer.
static void	be32 (unsigned char *p, size_t v)
	A big endian 32 bit value.
static void	check (const char *what, int ok)
	Count and print a failed condition.
static void	expect (const char what, const unsigned char buf, size_t len, const unsigned char *want, int expect_result)
	Find a profile in a buffer, and in the same bytes as a file.
static void	icc_chunk (unsigned char buf, size_t len, int seq, int of, const unsigned char *part, size_t n)
	One ICC chunk of a JPEG.
static void	le32 (unsigned char *p, size_t v)
	A little endian 32 bit value.
int	main (int argc, char **argv)
	run the checks, or report a file's profile
static size_t	make_jpeg (unsigned char buf, const unsigned char profile, int chunks, int padding)
	A JPEG shaped buffer: SOI, an APP0, padding segments, the profile in two chunks, second first, and a start of scan.
static size_t	make_png (unsigned char buf, const unsigned char profile, int after)
	A PNG shaped buffer with the profile in iCCP, before or after IDAT.
static void	make_profile (unsigned char *out, int ok)
	A profile shaped buffer: its size, "acsp" at 36, a pattern after.
static size_t	make_tiff (unsigned char buf, const unsigned char profile, int be)
	A TIFF shaped buffer with the profile in tag 34675.
static size_t	make_webp (unsigned char buf, const unsigned char profile)
	A WebP shaped buffer: VP8X, ICCP (odd length, padded), VP8L.
static void	png_chunk (unsigned char buf, size_t len, const char type, const unsigned char body, size_t n)
	A PNG chunk, CRC left zero: nothing here checks it.
static void	segment (unsigned char buf, size_t len, unsigned marker, const unsigned char *body, size_t n)
	A JPEG APP segment.

Variables
static int	failures = 0
	failures counted by check()

Macro Definition Documentation

◆ PROFILE_LEN

#define PROFILE_LEN 301

the test profile's length, odd so the WebP padding is exercised

Examples: ex_icc.c.

Definition at line 54 of file ex_icc.c.

Referenced by expect(), icc_chunk(), main(), make_jpeg(), make_png(), make_profile(), make_tiff(), and make_webp().

Function Documentation

◆ add()

void add	(	unsigned char *	buf,
		size_t *	len,
		const void *	data,
		size_t	n )

static

Append bytes to a growing buffer.

Parameters

buf	the buffer
len	its length, updated
data	what to add
n	how many

Examples: ex_icc.c.

Definition at line 76 of file ex_icc.c.

Referenced by make_jpeg(), make_png(), make_webp(), png_chunk(), and segment().

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◆ be32()

void be32	(	unsigned char *	p,
		size_t	v )

static

A big endian 32 bit value.

Parameters

p	where
v	the value

Examples: ex_icc.c.

Definition at line 144 of file ex_icc.c.

Referenced by make_tiff(), and png_chunk().

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◆ check()

void check	(	const char *	what,
		int	ok )

static

Count and print a failed condition.

Parameters

what	what was checked
ok	the condition

Examples: ex_icc.c, and ex_tiff.c.

Definition at line 46 of file ex_icc.c.

References failures.

Referenced by expect(), main(), test_broken(), and test_order().

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◆ expect()

void expect	(	const char *	what,
		const unsigned char *	buf,
		size_t	len,
		const unsigned char *	want,
		int	expect_result )

static

Find a profile in a buffer, and in the same bytes as a file.

Parameters

what	the case
buf	the bytes
len	how many
want	the profile expected, or NULL for none
expect_result	what n_icc_from_buffer() should answer

Definition at line 272 of file ex_icc.c.

References check(), n_icc_from_buffer(), n_icc_from_file(), and PROFILE_LEN.

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◆ icc_chunk()

void icc_chunk	(	unsigned char *	buf,
		size_t *	len,
		int	seq,
		int	of,
		const unsigned char *	part,
		size_t	n )

static

One ICC chunk of a JPEG.

Parameters

buf	the buffer
len	its length, updated
seq	its number
of	how many
part	its share of the profile
n	that share's length

Examples: ex_icc.c.

Definition at line 105 of file ex_icc.c.

References PROFILE_LEN, and segment().

Referenced by make_jpeg().

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◆ le32()

void le32	(	unsigned char *	p,
		size_t	v )

static

A little endian 32 bit value.

Parameters

p	where
v	the value

Definition at line 197 of file ex_icc.c.

◆ main()

int main	(	int	argc,
		char **	argv )

run the checks, or report a file's profile

-V LEVEL is accepted and ignored, as run_tests.sh passes it to every example; it used to be taken for the name of a file.

Parameters

argc	argument count
argv	arguments

Returns: 0 on success

Definition at line 306 of file ex_icc.c.

References check(), expect(), failures, LOG_NULL, make_jpeg(), make_png(), make_profile(), make_tiff(), make_webp(), n_icc_from_buffer(), n_icc_from_file(), n_icc_is_profile(), PROFILE_LEN, and set_log_level().

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◆ make_jpeg()

size_t make_jpeg	(	unsigned char *	buf,
		const unsigned char *	profile,
		int	chunks,
		int	padding )

static

A JPEG shaped buffer: SOI, an APP0, padding segments, the profile in two chunks, second first, and a start of scan.

Parameters

buf	receives it
profile	the profile, or NULL for none
chunks	2 for both chunks, 1 to leave the second out
padding	APP1 segments of 60000 bytes before the profile

Returns: its length

Examples: ex_icc.c.

Definition at line 122 of file ex_icc.c.

References add(), icc_chunk(), PROFILE_LEN, and segment().

Referenced by main().

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◆ make_png()

size_t make_png	(	unsigned char *	buf,
		const unsigned char *	profile,
		int	after )

static

A PNG shaped buffer with the profile in iCCP, before or after IDAT.

Parameters

buf	receives it
profile	the profile
after	non-zero to put the iCCP after the image data, where it no longer counts

Returns: its length

Definition at line 173 of file ex_icc.c.

References add(), png_chunk(), and PROFILE_LEN.

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◆ make_profile()

void make_profile	(	unsigned char *	out,
		int	ok )

static

A profile shaped buffer: its size, "acsp" at 36, a pattern after.

Parameters

out	receives PROFILE_LEN bytes
ok	zero to leave the signature out

Examples: ex_icc.c.

Definition at line 59 of file ex_icc.c.

References PROFILE_LEN.

Referenced by main().

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◆ make_tiff()

size_t make_tiff	(	unsigned char *	buf,
		const unsigned char *	profile,
		int	be )

static

A TIFF shaped buffer with the profile in tag 34675.

Parameters

buf	receives it
profile	the profile
be	non-zero for big endian

Returns: its length

Examples: ex_icc.c.

Definition at line 235 of file ex_icc.c.

References be32(), le32(), and PROFILE_LEN.

Referenced by main().

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◆ make_webp()

size_t make_webp	(	unsigned char *	buf,
		const unsigned char *	profile )

static

A WebP shaped buffer: VP8X, ICCP (odd length, padded), VP8L.

Parameters

buf	receives it
profile	the profile

Returns: its length

Examples: ex_icc.c.

Definition at line 208 of file ex_icc.c.

References add(), le32(), and PROFILE_LEN.

Referenced by main().

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◆ png_chunk()

void png_chunk	(	unsigned char *	buf,
		size_t *	len,
		const char *	type,
		const unsigned char *	body,
		size_t	n )

static

A PNG chunk, CRC left zero: nothing here checks it.

Parameters

buf	the buffer
len	its length, updated
type	the four letters
body	the contents
n	their length

Examples: ex_icc.c.

Definition at line 157 of file ex_icc.c.

References add(), be32(), and type().

Referenced by make_png().

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◆ segment()

void segment	(	unsigned char *	buf,
		size_t *	len,
		unsigned	marker,
		const unsigned char *	body,
		size_t	n )

static

A JPEG APP segment.

Parameters

buf	the buffer
len	its length, updated
marker	the marker byte, 0xE0 to 0xEF
body	the segment's contents
n	their length

Examples: ex_icc.c.

Definition at line 87 of file ex_icc.c.

References add().

Referenced by icc_chunk(), and make_jpeg().

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Variable Documentation

◆ failures

int failures = 0

static

failures counted by check()

Definition at line 41 of file ex_icc.c.

Macros

Functions

Variables

Macro Definition Documentation

◆ PROFILE_LEN

Function Documentation

◆ add()

◆ be32()

◆ check()

◆ expect()

◆ icc_chunk()

◆ le32()

◆ main()

◆ make_jpeg()

◆ make_png()

◆ make_profile()

◆ make_tiff()

◆ make_webp()

◆ png_chunk()

◆ segment()

Variable Documentation

◆ failures