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	adding arg.h, thank you __20h__ - ploot - simple plotting tools
	git clone git://bitreich.org/ploot git://enlrupgkhuxnvlhsf6lc3fziv5h2hhfrinws65…
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	---
	commit c529b0f871ecc44395506be3e5eb928caa4b63e0
	parent 800a50b0368df65b45838095a362b579cc709d75
	Author: Josuah Demangeon <[email protected]>
	Date: Sat, 3 Feb 2018 01:48:52 +0100

	adding arg.h, thank you __20h__

	Diffstat:
	M Makefile \| 3 +++
	A arg.h \| 25 +++++++++++++++++++++++++
	M ploot.c \| 28 ++++++++++++++++++++++++----

	3 files changed, 52 insertions(+), 4 deletions(-)
	---
	diff --git a/Makefile b/Makefile
	@@ -2,3 +2,6 @@ CFLAGS = -Wall -Wextra -Werror -std=c89 -pedantic

	all: ploot.o config.h
	${CC} -static -o ploot ploot.o
	+
	+clean:
	+ rm -f *.o ploot
	diff --git a/arg.h b/arg.h
	@@ -0,0 +1,25 @@
	+#define USED(x) ((void)(x))
	+
	+extern char *argv0;
	+
	+#define ARGBEGIN(argc, argv) \
	+ for (argv0 = *argv, argv++, argc--; \
	+ argv[0] != NULL && argv[0][0] == '-' && argv[0][1] != '\0'; …
	+ argc--, argv++) { \
	+ char *arg_v, arg_s; \
	+ if (argv[0][1] == '-' && argv[0][2] == '\0') { \
	+ argv++, argc--; …
	+ break; \
	+ } \
	+ arg_v = argv; \
	+ for (arg_s = argv; arg_s != '\0'; arg_s++) { \
	+ if (arg_v != argv) \
	+ break; \
	+ switch (*arg_s)
	+
	+#define ARGEND \
	+ } \
	+ }
	+
	+#define EARGF(x) …
	+ ((argv[1] == NULL) ? ((x), NULL) : (argc--, argv++, argv[0]))
	diff --git a/ploot.c b/ploot.c
	@@ -1,16 +1,21 @@
	+#include <sys/time.h>
	+
	#include <stdio.h>
	+#include <stdlib.h>
	#include <string.h>
	-#include <sys/time.h>

	+#include "arg.h"
	#include "config.h"

	#define MAX_VAL 80
	#define MARGIN 7
	-#define HEIGHT 20

	#define ABS(x) ((x) < 0 ? -(x) : (x))
	#define LEN(x) (sizeof(x) / sizeof(*x))

	+char *argv0;
	+int flag_h = 20;
	+
	/*
	* Set `str' to a human-readable form of `num' with always a width of 7 (+ 1
	* the '\0' terminator). Buffer overflow is ensured not to happen due to the
	@@ -162,8 +167,15 @@ read_time_series(double valv, time_t timev)
	return valv;
	}

	+void
	+usage(void)
	+{
	+ printf("usage: %s [-h height]\n", argv0);
	+ exit(1);
	+}
	+
	int
	-main()
	+main(int argc, char **argv)
	{
	double val[] = { 55, 55, 1, 72, 53, 73, 6, 45, 7, 71, 18, 100, …
	53, 24, 99, 99, 37, 91, 67, 68, 9, 16, 83, 30, 68, 51, 38, 47, 91,
	@@ -173,6 +185,14 @@ main()
	71, 61, 12, 29, 63, 85, 72, 98, 59, 96, 91, 67, 24, 48, 4, 90, 1,
	15, 57, 11, 93, 18, 18, 78, 85, 36, 35, 15, 7, 85, 31, 73, 57, 70 …

	- plot(HEIGHT, val, val + LEN(val), "Sample data generated with jot");
	+ ARGBEGIN(argc, argv) {
	+ case 'h':
	+ flag_h = atoi(EARGF(usage()));
	+ if (flag_h <= 0)
	+ usage();
	+ break;
	+ } ARGEND;
	+
	+ plot(flag_h, val, val + LEN(val), "Sample data generated with jot");
	return 0;
	}