added the option to disable color

Makefile

@@ -4,7 +4,7 @@ example: example.c snow/snow.h
	$(CC) $(CFLAGS) -g -Wall -o $@ $<

test: example
	valgrind $(VGFLAGS) ./example
	@valgrind $(VGFLAGS) ./example $(ARGS)

clean:
	rm -f example

README.md

@@ -24,6 +24,14 @@ Some miscellaneous points:
  ISO C compatible compilers. It's confirmed to work with at least GCC and
  Clang.

## Arguments

Since you're not supposed to make your own main function, and instead use the
`snow_main` macro, your binary will take these arguments:

* **--color**: Force the use of color, even when stdout is not a TTY.
* **--no-color**: Force colors to be disabled, evern when stdout is a TTY.

## Example

Here's a simple example which tests a couple of filesystem functions, and has a
@@ -68,10 +76,9 @@ example in [example.c](https://github.com/mortie/snow/blob/master/example.c).
		});
	});

	int main() {
	snow_main({
		test_files();
		done();
	}
	});

## Structure Macros

@@ -102,12 +109,11 @@ reverse order of their definitions (i.e `defer(printf("World"));
defer(printf("Hello "));` will print "Hello World"). If the test case fails,
only deferred expressions defined before the point of failure will be executed.

### done()
### snow\_main(block)

Must be called at the end of the main function. It will print the total count
of total and successful tests (if there's more than one top-level description),
and return with an appropriate exit code (0 if no tests failed, 1 if tests
failed).
This macro expands to a main function which handless stuff like parsing
arguments and freeing memory allocated by Snow. The `block` should just be
calling the various functions defined by `describe`.

## Assert Macros

example.c

@@ -61,7 +61,6 @@ describe(files, {
	});
});

int main() {
snow_main({
	test_files();
	done();
}
});

snow/snow.h

@@ -9,6 +9,7 @@
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#ifndef SNOW_COLOR_SUCCESS
#define SNOW_COLOR_SUCCESS "\033[32m"
@@ -31,6 +32,8 @@ static int _snow_global_total = 0;
static int _snow_global_successes = 0;
static int _snow_num_defines = 0;

static int _snow_opt_color = 1;

struct {
	void **labels;
	size_t size;
@@ -40,14 +43,20 @@ struct {
#define _snow_fail(desc, spaces, name, file, ...) \
	do { \
		_snow_exit_code = 1; \
		fprintf(stderr, \
			_SNOW_COLOR_BOLD SNOW_COLOR_FAIL "%s✕ " \
			_SNOW_COLOR_RESET SNOW_COLOR_FAIL "Failed:  " \
			_SNOW_COLOR_RESET SNOW_COLOR_DESC "%s" \
			_SNOW_COLOR_RESET ":\n%s    ", \
			spaces, desc, spaces); \
		fprintf(stderr, __VA_ARGS__); \
		fprintf(stderr, \
		if (_snow_opt_color) { \
			fprintf(stdout, \
				_SNOW_COLOR_BOLD SNOW_COLOR_FAIL "%s✕ " \
				_SNOW_COLOR_RESET SNOW_COLOR_FAIL "Failed:  " \
				_SNOW_COLOR_RESET SNOW_COLOR_DESC "%s" \
				_SNOW_COLOR_RESET ":\n%s    ", \
				spaces, desc, spaces); \
		} else { \
			fprintf(stdout, \
				"%s✕ Failed:  %s:\n%s    ", \
				spaces, desc, spaces); \
		} \
		fprintf(stdout, __VA_ARGS__); \
		fprintf(stdout, \
			"\n%s    in %s:%s\n", spaces, file, name); \
	} while (0)

@@ -182,30 +191,49 @@ static int __attribute__((unused)) _snow_assertneq_str(

#define _snow_print_success() \
	do { \
		fprintf(stderr, \
			_SNOW_COLOR_BOLD SNOW_COLOR_SUCCESS "%s✓ " \
			_SNOW_COLOR_RESET SNOW_COLOR_SUCCESS "Success: " \
			_SNOW_COLOR_RESET SNOW_COLOR_DESC "%s" \
			_SNOW_COLOR_RESET "\n", \
			_snow_spaces, _snow_desc); \
		if (_snow_opt_color) { \
			fprintf(stdout, \
				_SNOW_COLOR_BOLD SNOW_COLOR_SUCCESS "%s✓ " \
				_SNOW_COLOR_RESET SNOW_COLOR_SUCCESS "Success: " \
				_SNOW_COLOR_RESET SNOW_COLOR_DESC "%s" \
				_SNOW_COLOR_RESET "\n", \
				_snow_spaces, _snow_desc); \
		} else { \
			fprintf(stdout, \
				"%s✓ Success: %s\n", \
				_snow_spaces, _snow_desc); \
		} \
	} while (0)

#define _snow_print_run() \
	do { \
		if (_snow_depth > 0 || _snow_first_define) { \
			fprintf(stderr, "\n"); \
			fprintf(stdout, "\n"); \
			_snow_first_define = 0; \
		} \
		fprintf(stderr, _SNOW_COLOR_BOLD "%sTesting %s:" _SNOW_COLOR_RESET "\n", \
			_snow_spaces, _snow_name); \
		if (_snow_opt_color) { \
			fprintf(stdout, \
				_SNOW_COLOR_BOLD "%sTesting %s:" _SNOW_COLOR_RESET "\n", \
				_snow_spaces, _snow_name); \
		} else { \
			fprintf(stdout, \
				"%sTesting %s:\n", \
				_snow_spaces, _snow_name); \
		} \
	} while (0)

#define _snow_print_done() \
	do { \
		fprintf(stderr, \
			_SNOW_COLOR_BOLD "%s%s: Passed %i/%i tests." \
			_SNOW_COLOR_RESET "\n\n", \
			_snow_spaces, _snow_name, _snow_successes, _snow_total); \
		if (_snow_opt_color) { \
			fprintf(stdout, \
				_SNOW_COLOR_BOLD "%s%s: Passed %i/%i tests." \
				_SNOW_COLOR_RESET "\n\n", \
				_snow_spaces, _snow_name, _snow_successes, _snow_total); \
		} else { \
			fprintf(stdout, \
				"%s%s: Passed %i/%i tests.\n\n", \
				_snow_spaces, _snow_name, _snow_successes, _snow_total); \
		} \
	} while (0)

#define defer(expr) \
@@ -293,16 +321,31 @@ static int __attribute__((unused)) _snow_assertneq_str(
		_snow_global_total += _snow_total; \
	}

#define done() \
	do { \
#define snow_main(block) \
	int main(int argc, char **argv) { \
		if (!isatty(1)) \
			_snow_opt_color = 0; \
		for (int i = 1; i < argc; ++i) { \
			if (strcmp(argv[i], "--color") == 0) \
				_snow_opt_color = 1; \
			else if (strcmp(argv[i], "--no-color") == 0) \
				_snow_opt_color = 0; \
		} \
		block \
		free(_snow_labels.labels); \
		if (_snow_num_defines > 1) { \
			fprintf(stderr, \
				_SNOW_COLOR_BOLD "Total: Passed %i/%i tests.\n\n" \
				_SNOW_COLOR_RESET, \
				_snow_global_successes, _snow_global_total); \
			if (_snow_opt_color) { \
				fprintf(stdout, \
					_SNOW_COLOR_BOLD "Total: Passed %i/%i tests.\n\n" \
					_SNOW_COLOR_RESET, \
					_snow_global_successes, _snow_global_total); \
			} else { \
				fprintf(stdout, \
					"Total: Passed %i/%i tests.\n\n", \
					_snow_global_successes, _snow_global_total); \
			} \
		} \
		return _snow_exit_code; \
	} while (0)
	}

#endif