BSTRLIB_BASE_URL ?= https://raw.githubusercontent.com/websnarf/bstrlib/208b1f2a4dfc96b806ed499bd1909e87ec15981d
CFLAGS = -g -O2 -Wall -Wextra -Isrc -Lbuild -rdynamic -DNDEBUG $(OPTFLAGS)
LDLIBS = -ldl $(OPTLIBS)

PREFIX ?= /usr/local

FIND ?= find
CD ?= cd
PATCH ?= patch
INSTALL ?= install
MKDIR ?= mkdir -p
CURL ?= curl -sSL
RANLIB ?= ranlib
RUNTESTS ?= ./tests/runtests

SOURCES = $(wildcard src/**/*.c src/*.c)
OBJECTS = $(patsubst %.c,%.o,$(SOURCES))

TEST_SRC = $(wildcard tests/**/*_tests.c tests/*_tests.c)
TESTS = $(patsubst %.c,%,$(TEST_SRC))

LIBNAME = lcthw
TARGET = build/lib$(LIBNAME).a
SO_TARGET = $(patsubst %.a,%.so,$(TARGET))

all: $(TARGET) $(SO_TARGET) tests

dev: CFLAGS = -g -Wall -Isrc -Wall -Wextra $(OPTFLAGS)
dev: all

$(TARGET): CFLAGS += -fPIC
$(TARGET): build $(OBJECTS)
	$(AR) rcs $@ $(OBJECTS)
	$(RANLIB) $@

$(SO_TARGET): $(TARGET) $(OBJECTS)
	$(CC) -shared -o $@ $(OBJECTS)

build: bin src/lcthw/bstrlib.c src/lcthw/bstrlib.h
	@$(MKDIR) $@

bin:
	@$(MKDIR) $@

src/lcthw/bstrlib.c: src/lcthw/bstrlib.h
	$(CURL) -o $@ $(BSTRLIB_BASE_URL)/bstrlib.c
	$(CD) src/lcthw && $(PATCH) -p1 < bstrlib.patch

src/lcthw/bstrlib.h:
	$(CURL) -o $@ $(BSTRLIB_BASE_URL)/bstrlib.h

.PHONY: tests
tests: LDLIBS += -static -l$(LIBNAME) -lbsd
tests: $(RUNTESTS) $(TESTS)
	$(RUNTESTS) ./tests/lcthw

valgrind:
	VALGRIND="valgrind --log-file=/tmp/valgrind-%p.log" $(MAKE)

clean:
	$(RM) -r build $(OBJECTS) $(TESTS)
	$(RM) tests/tests.log tests/runtests
	$(FIND) . -name "*.gc*" -exec rm {} \;
	$(RM) -r `find . -name "*.dSYM" -print`

distclean: clean
	$(RM) src/lcthw/bstrlib.c src/lcthw/bstrlib.h

install: all
	$(INSTALL) -d $(DESTDIR)/$(PREFIX)/lib/
	$(INSTALL) $(TARGET) $(DESTDIR)/$(PREFIX)/lib/

BADFUNCS='[^_.>a-zA-Z0-9](str(n?cpy|n?cat|xfrm|n?dup|str|pbrk|tok|_)|stpn?cpy|a?sn?printf|byte_)'
check:
	@echo Files with potentially dangerous functions
	@egrep $(BADFUNCS) $(SOURCES) || true