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Add stripfc tool

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This commit is contained in:
Virgil Dupras 2020-04-04 10:27:21 -04:00
parent 2af959a13d
commit ba384bfa0f
4 changed files with 64 additions and 2 deletions
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6
emul/Makefile
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@ -4,10 +4,12 @@ FORTHSRCS = core.fs print.fs str.fs parse.fs readln.fs fmt.fs z80a.fs
FORTHSRC_PATHS = ${FORTHSRCS:%=../forth/%} forth/run.fs
OBJS = emul.o libz80/libz80.o
SLATEST = ../tools/slatest
STRIPFC = ../tools/stripfc
.PHONY: all
all: $(TARGETS)
$(STRIPFC):
$(SLATEST):
$(MAKE) -C ../tools
@ -27,8 +29,10 @@ forth/stage1: forth/stage.c $(OBJS) forth/forth0-bin.h
forth/stage1dbg: forth/stage.c $(OBJS) forth/forth0-bin.h
$(CC) -DDEBUG forth/stage.c $(OBJS) -o $@
# We don't really need to use stripfc, but we do it anyway to test that we
# don't mistakenly break our code with that tool. It's easier to debug here.
forth/core.bin: $(FORTHSRC_PATHS) forth/stage1
cat $(FORTHSRC_PATHS) ./forth/stop.fs | ./forth/stage1 | tee $@ > /dev/null
cat $(FORTHSRC_PATHS) ./forth/stop.fs | $(STRIPFC) | ./forth/stage1 | tee $@ > /dev/null
forth/forth1.bin: forth/core.bin $(SLATEST)
cat forth/boot.bin forth/z80c.bin forth/core.bin > $@

1
tools/.gitignore vendored
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@ -5,3 +5,4 @@
/ttysafe
/pingpong
/slatest
/stripfc

4
tools/Makefile
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@ -5,8 +5,9 @@ FONTCOMPILE_TGT = fontcompile
TTYSAFE_TGT = ttysafe
PINGPONG_TGT = pingpong
SLATEST_TGT = slatest
STRIPFC_TGT = stripfc
TARGETS = $(MEMDUMP_TGT) $(BLKDUMP_TGT) $(UPLOAD_TGT) $(FONTCOMPILE_TGT) \
$(TTYSAFE_TGT) $(PINGPONG_TGT) $(SLATEST_TGT)
$(TTYSAFE_TGT) $(PINGPONG_TGT) $(SLATEST_TGT) $(STRIPFC_TGT)
OBJS = common.o
all: $(TARGETS)
@ -22,6 +23,7 @@ $(FONTCOMPILE_TGT): $(FONTCOMPILE_TGT).c
$(TTYSAFE_TGT): $(TTYSAFE_TGT).c
$(PINGPONG_TGT): $(PINGPONG_TGT).c
$(SLATEST_TGT): $(SLATEST_TGT).c
$(STRIPFC_TGT): $(STRIPFC_TGT).c
$(TARGETS): $(OBJS)
$(CC) $(CFLAGS) $@.c $(OBJS) -o $@

55
tools/stripfc.c Normal file
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@ -0,0 +1,55 @@
#include <stdio.h>
/* read stdin and strip Forth-style comments before spitting in stdout. This
also deduplicate spaces and newlines.
THIS PARSING IS IMPERFECT. Only a Forth interpreter can reliably detect
comments. For example, a naive parser misinterprets the "(" word definition as
a comment.
We work around this by considering as a comment opener only "(" chars preceeded
by more than once space or by a newline. Hackish, but works.
*/
int main()
{
int spccnt = 0;
int incomment = 0;
int c;
c = getchar();
while ( c != EOF ) {
if (c == '\n') {
// We still spit newlines whenever we see them, Forth interpreter
// doesn't like when they're not there...
putchar(c);
spccnt += 2;
} else if (c == ' ') {
spccnt++;
} else {
if (incomment) {
if ((c == ')') && spccnt) {
incomment = 0;
}
} else {
if ((c == '(') && (spccnt > 1)) {
putchar(' ');
spccnt = 0;
int next = getchar();
if (next <= ' ') {
incomment = 1;
continue;
}
putchar(c);
c = next;
}
if (spccnt) {
putchar(' ');
}
putchar(c);
}
spccnt = 0;
}
c = getchar();
}
return 0;
}