fixed annoying off-by-one bug

Signed-off-by: Sven Oliver Moll <svolli@svolli.de>

Makefile

@@ -11,19 +11,23 @@ PICO_SDK_PATH_CMAKE ?= -DPICO_SDK_PATH=$(PICO_SDK_PATH)
 RELEASE_ARCHIVE := SorbusComputerCores.zip
 
 PICO_SDK_URL ?= https://github.com/raspberrypi/pico-sdk.git
+PICO_BOARD ?= pico
+BUILD_DIR ?= $(CURDIR)/build
+SRC_DIR := $(CURDIR)/src
+JOBS ?= 4
 
 .PHONY: all clean distclean release setup-apt
 
 all: $(PICO_SDK_PATH)/README.md
-	cmake -S $(CURDIR)/src -B $(CURDIR)/build $(PICO_SDK_PATH_CMAKE)
-	make -C $(CURDIR)/build
+	cmake -S $(SRC_DIR) -B $(BUILD_DIR) $(PICO_SDK_PATH_CMAKE) -DPICO_BOARD=$(PICO_BOARD)
+	make -C $(BUILD_DIR) -j$(JOBS)
 
 clean:
-	make -C $(CURDIR)/build clean
+	make -C $(BUILD_DIR) clean
 	rm -f $(RELEASE_ARCHIVE)
 
 distclean:
-	rm -rf $(RELEASE_ARCHIVE) $(CURDIR)/build
+	rm -rf $(RELEASE_ARCHIVE) $(BUILD_DIR)
 
 $(PICO_SDK_PATH)/README.md:
 	mkdir -p $(PICO_SDK_PATH)
@@ -33,7 +37,7 @@ setup-apt:
 	sudo apt install gdb-multiarch cmake gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib cc65 microcom p7zip-full
 
 $(RELEASE_ARCHIVE): all
-	for i in $$(ls -1 build/rp2040/*.uf2|grep -v _test.uf2$$); do cp -v $${i} sorbus-computer-$$(basename $${i});done
+	for i in $$(ls -1 $(BUILD_DIR)/rp2040/*.uf2|grep -v _test.uf2$$); do cp -v $${i} sorbus-computer-$$(basename $${i});done
 	cp doc/README_release.txt README.txt
 	rm -f $@
 	7z a -mx=9 -bd -sdel $@ README.txt *.uf2

src/rp2040/getaline.c

@@ -197,7 +197,7 @@ const char *getaline()
    /* only move history when required */
    if( input[0][0] && strncmp( &input[0][0], &input[1][0], INPUT_SIZE ) )
    {
-      for( int i = HISTORY_SIZE; i > 0; --i )
+      for( int i = HISTORY_SIZE-1; i > 0; --i )
       {
          memcpy( &input[i][0], &input[i-1][0], INPUT_SIZE );
       }