Initial commit

11 files changed, 216 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1c56290
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*.a
+*.o
+*.so
+test-app
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..4883772
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,26 @@
+Copyright 2023 Alessandro Iezzi
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+may be used to endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..b3f85e3
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,33 @@
+# See LICENSE file for copyright and license details.
+
+CC   = cc
+SRC != find src -name '*.c'
+OBJ  = ${SRC:.c=.o}
+
+LIBNAME = libstr
+
+CFLAGS  = -Wall -ansi --std=c89 -pedantic ${OPT}
+LDFLAGS =
+
+dist:
+	@make OPT='-O2 -pipe -Werror' all
+
+debug:
+	@make OPT=-g all
+
+all: ${LIBNAME:=.so} ${LIBNAME:=.a}
+
+${LIBNAME:=.so}: ${OBJ}
+	${CC} ${LDFLAGS} -fPIC -shared ${OBJ} -o $@
+
+${LIBNAME:=.a}: ${OBJ}
+	ar rcs $@ ${OBJ}
+
+.c.o:
+	${CC} ${CFLAGS} -fPIC -c $< -o $@
+
+clean:
+	rm -f ${OBJ} ${LIBNAME}.* *.core
+
+tests: all
+	cd test && make clean tests
diff --git a/src/string2.c b/src/string2.c
new file mode 100644
index 0000000..332dbf7
--- /dev/null
+++ b/src/string2.c
@@ -0,0 +1,46 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <stdio.h>
+#include <string.h>
+
+int
+strends(const char *str, const char *end)
+{
+	int size_s1 = strlen(str);
+	int size_s2 = strlen(end);
+
+	int i = size_s1 - 1, j = size_s2 - 1;
+
+	if (size_s2 > size_s1) {
+		return 1;
+	}
+
+	for (; i >= 0 && j >= 0; i--, j--) {
+		if (str[i] != end[j]) {
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+int
+strstarts(const char *str, const char *end)
+{
+	int size_s1 = strlen(str);
+	int size_s2 = strlen(end);
+
+	int i = 0;
+
+	if (size_s2 > size_s1) {
+		return 1;
+	}
+
+	for (; i < size_s2; i++) {
+		if (str[i] != end[i]) {
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/src/string2.h b/src/string2.h
new file mode 100644
index 0000000..4d79dfd
--- /dev/null
+++ b/src/string2.h
@@ -0,0 +1,11 @@
+/* See LICENSE file for copyright and license details. */
+
+#ifndef __STRING2_H__
+#define __STRING2_H__
+
+#include <string.h>
+
+int		 strends(const char *, const char *);
+int		 strstarts(const char *, const char *);
+
+#endif /* __STRING2_H__ */
diff --git a/test/Makefile b/test/Makefile
new file mode 100644
index 0000000..5cc71c6
--- /dev/null
+++ b/test/Makefile
@@ -0,0 +1,21 @@
+# See LICENSE file for copyright and license details.
+
+CC   = cc
+SRC != find * -name '*.c'
+OBJ  = ${SRC:.c=.o}
+
+CFLAGS  = -Wall -ansi --std=c89 -pedantic\
+	-I../src/
+LDFLAGS = -L../ -l:libstr.a
+
+tests: test-app
+	./test-app
+
+.c.o:
+	${CC} ${CFLAGS} -c $< -o $@
+
+test-app: ${OBJ}
+	${CC} ${LDFLAGS} -o $@ ${OBJ}
+
+clean:
+	rm -f ${test-app} ${OBJ}
diff --git a/test/main.c b/test/main.c
new file mode 100644
index 0000000..f6be903
--- /dev/null
+++ b/test/main.c
@@ -0,0 +1,12 @@
+/* See LICENSE file for copyright and license details. */
+
+#include "test1.h"
+
+int
+main(int argc, char **argv)
+{
+	test1();
+	test2();
+
+	return 0;
+}
diff --git a/test/test.c b/test/test.c
new file mode 100644
index 0000000..a47adb6
--- /dev/null
+++ b/test/test.c
@@ -0,0 +1,14 @@
+/* See LICENSE file for copyright and license details. */
+
+/* See LICENSE file for copyright and license details. */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+void
+asserti(int expected, int value)
+{
+	if (expected != value) {
+		exit(1);
+	}
+}
diff --git a/test/test.h b/test/test.h
new file mode 100644
index 0000000..cbd0a84
--- /dev/null
+++ b/test/test.h
@@ -0,0 +1,8 @@
+/* See LICENSE file for copyright and license details. */
+
+#ifndef __TEST_H__
+#define __TEST_H__
+
+void		 asserti(int, int);
+
+#endif /* __TEST_H__ */
diff --git a/test/test1.c b/test/test1.c
new file mode 100644
index 0000000..777aa5f
--- /dev/null
+++ b/test/test1.c
@@ -0,0 +1,32 @@
+/* See LICENSE file for copyright and license details. */
+
+#include <string2.h>
+#include <stdio.h>
+
+#include "test.h"
+
+void
+test1(void)
+{
+	printf("executing test1... ");
+	asserti(0, strends("alexander", "xander"));
+	asserti(1, strends("alexander", "dander"));
+	asserti(1, strends("alexander", "alex"));
+	asserti(0, strends("alexander", "alexander"));
+	asserti(1, strends("dwm",       "dwmdwm"));
+
+	printf("OK\n");
+}
+
+void
+test2(void)
+{
+	printf("executing test2... ");
+	asserti(0, strstarts("alexander", "alex"));
+	asserti(1, strstarts("alexander", "dalex"));
+	asserti(1, strstarts("alexander", "xander"));
+	asserti(0, strstarts("alexander", "alexander"));
+	asserti(1, strstarts("dwm",       "dwmdwm"));
+
+	printf("OK\n");
+}
diff --git a/test/test1.h b/test/test1.h
new file mode 100644
index 0000000..1b88561
--- /dev/null
+++ b/test/test1.h
@@ -0,0 +1,9 @@
+/* See LICENSE file for copyright and license details. */
+
+#ifndef __TEST1_H__
+#define __TEST1_H__
+
+void		 test1(void);
+void		 test2(void);
+
+#endif /* __TEST1_H__ */