svex

commit a41bc0926d3d369009bf864cffafe83313b73c30
Author: zavok <an2qzavok@gmail.com>
Date:   Fri, 28 Feb 2020 13:24:34 +0300

start

Diffstat:
A
Makefile
 | 
32
++++++++++++++++++++++++++++++++
A
README
 | 
3
+++
A
arg.h
 | 
50
++++++++++++++++++++++++++++++++++++++++++++++++++
A
example.tsv
 | 
3
+++
A
svex.c
 | 
55
+++++++++++++++++++++++++++++++++++++++++++++++++++++++

5 files changed, 143 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,32 @@
+.POSIX:
+
+PREFIX = /usr/local
+MANDIR = $(PREFIX)/share/man/man1
+
+BIN = svex
+MAN = $(BIN).1
+OBJ = $(BIN:=.o)
+
+all: $(BIN)
+
+$(BIN): $(OBJ)
+	$(CC) $(OBJ) $(LDFLAGS) $(LIBS) -o $@
+
+$(OBJ):
+
+install: $(BIN)
+	mkdir -p $(DESTDIR)$(PREFIX)/bin/
+	cp -f $(BIN) $(DESTDIR)$(PREFIX)/bin/
+	chmod 555 $(DESTDIR)$(PREFIX)/bin/$(BIN)
+	mkdir -p $(DESTDIR)$(MANDIR)
+	cp -f $(MAN) $(DESTDIR)$(MANDIR)
+
+uninstall:
+	rm -f $(DESTDIR)$(PREFIX)/bin/$(BIN)
+	rm -f $(DESTDIR)$(MANDIR)/$(MAN)
+
+clean:
+	rm -f $(BIN) $(OBJ)
+
+.c.o:
+	$(CC) $(CFLAGS) -c $<
diff --git a/README b/README
@@ -0,0 +1,3 @@
+svex - [tab] separated value explorer.
+
+
diff --git a/arg.h b/arg.h
@@ -0,0 +1,50 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef ARG_H__
+#define ARG_H__
+
+extern char *argv0;
+
+/* use main(int argc, char *argv[]) */
+#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
+					argv[0] && argv[0][0] == '-'\
+					&& argv[0][1];\
+					argc--, argv++) {\
+				char argc_;\
+				char **argv_;\
+				int brk_;\
+				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+					argv++;\
+					argc--;\
+					break;\
+				}\
+				int i_;\
+				for (i_ = 1, brk_ = 0, argv_ = argv;\
+						argv[0][i_] && !brk_;\
+						i_++) {\
+					if (argv_ != argv)\
+						break;\
+					argc_ = argv[0][i_];\
+					switch (argc_)
+
+#define ARGEND			}\
+			}
+
+#define ARGC()		argc_
+
+#define EARGF(x)	((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
+				((x), abort(), (char *)0) :\
+				(brk_ = 1, (argv[0][i_+1] != '\0')?\
+					(&argv[0][i_+1]) :\
+					(argc--, argv++, argv[0])))
+
+#define ARGF()		((argv[0][i_+1] == '\0' && argv[1] == NULL)?\
+				(char *)0 :\
+				(brk_ = 1, (argv[0][i_+1] != '\0')?\
+					(&argv[0][i_+1]) :\
+					(argc--, argv++, argv[0])))
+
+#endif
diff --git a/example.tsv b/example.tsv
@@ -0,0 +1,3 @@
+John	Galt
+John	Smith
+John	Doe
diff --git a/svex.c b/svex.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+#include "arg.h"
+
+char *argv0;
+
+char *fname;
+
+char *buff;
+ulong blen;
+
+void load(void);
+
+void
+usage (void)
+{
+	dprintf(2, "usage: %s file.tsv\n", argv0);
+	exit(0);
+}
+
+int
+main (int argc, char *argv[])
+{
+	blen = 0;
+	buff = 0;
+	ARGBEGIN{
+	default: usage();
+	} ARGEND
+	if (argc == 0) usage();
+	if (argc > 1) usage();
+	fname = argv[1];
+	load();
+	return 0;
+}
+
+void
+load(void)
+{
+	int f;
+	ulong n;
+	char b[1024], *bp;
+	bp = buff;
+	f = open(fname, O_RDONLY);
+	while ((n = read(f, b, 1024)) > 0){
+		buff = realloc(buff, blen + n);
+		memcpy(bp, b, n);
+		bp += n;
+		blen += n;
+	}
+	close(f);
+}