Skip to content
Snippets Groups Projects
Commit d2764684 authored by Andrew Cooks's avatar Andrew Cooks
Browse files

add ccmtcnvt

Fedora doesn't ship the 'liwc' package (that provides ccmtcnvt) or its
'publib' dependency. This adds a modified, stand-alone version of ccmtcnvt.
parent b134d657
No related branches found
No related tags found
No related merge requests found
PROG = ccmtcnvt
CPPFLAGS := -D_POSIX_C_SOURCE=2 $(CPPFLAGS)
CFLAGS := -Wall -std=c99 -pedantic -O2 $(CFLAGS)
.PHONY: all
all: $(PROG) Makefile
%.o: %.c %.h Makefile
$(COMPILE.c) $< -o $@
$(PROG): $(PROG).o
$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $<
clean:
rm $(PROG) *.o || true
/*
* Copied from liwc, a collection of tools for manipulating C source code
* Retrieved from https://github.com/ajkaijanaho/liwc
*
* Copyright (c) 2012 Antti-Juhani Kaijanaho
* Copyright (c) 1994-2003 Lars Wirzenius
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
/*
* ccmtcnvt.c -- convert C++ comments to C comments
*
* Usage: ccmtcnvt [-hv] [--help] [--version] <file>
* All output is to the standard output.
*
* This program converts the C++ style comments into traditional C style
* comments.
*
* This is written as a finite state machine (FSM), which reads (presumably
* correct) C code, and when it finds a // that is not inside a comment, or
* string or character literal, it converts it to a C start of comment and
* adds a space and a comment delimiter (unreproducible here :-) before the
* next newline.
*
* Known problems:
*
* a) Include file names are not recognized being special, so that
*
* #include <sys//stat.h>
*
* will be mangled. I've never seen such names used in source code, though,
* so I don't think ignoring them will cause too much harm.
*
* b) Does not understand trigraphs or digraphs.
*
* c) Does not understand line continuation (\ at end of line) outside
* string literals and character constants.
*
* Patches for fixing these are welcome. They're not common enough for me
* to worry about them, at least for now.
*/
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/*
* Special marks for input characters used in the description of the FSM.
*/
#define DFL (int)UCHAR_MAX+1 /* any character */
#define NONE (int)UCHAR_MAX+2 /* don't print any character */
#define SELF (int)UCHAR_MAX+3 /* print last input character */
/*
* Possible states for the FSM.
*/
enum state {
code, chr_lit, chr_esc, str_lit, str_esc,
slash, cpp_cmt, cpp_ast, c_cmt, star
};
/*
* Rules for describing the state changes and associated actions for the
* FSM.
*/
struct rule {
enum state state;
int c;
enum state new_state;
int print1, print2, print3, print4;
const char *warning;
};
/*
* The FSM itself.
*/
static const struct rule fsm[] = {
{ code, '"', str_lit, SELF, NONE, NONE, NONE, NULL },
{ code, '\'', chr_lit, SELF, NONE, NONE, NONE, NULL },
{ code, '/', slash, NONE, NONE, NONE, NONE, NULL },
{ code, DFL, code, SELF, NONE, NONE, NONE, NULL },
{ str_lit, '\\', str_esc, SELF, NONE, NONE, NONE, NULL },
{ str_lit, '"', code, SELF, NONE, NONE, NONE, NULL },
{ str_lit, DFL, str_lit, SELF, NONE, NONE, NONE, NULL },
{ str_esc, DFL, str_lit, SELF, NONE, NONE, NONE, NULL },
{ chr_lit, '\\', chr_esc, SELF, NONE, NONE, NONE, NULL },
{ chr_lit, '\'', code, SELF, NONE, NONE, NONE, NULL },
{ chr_lit, DFL, chr_lit, SELF, NONE, NONE, NONE, NULL },
{ chr_esc, DFL, chr_lit, SELF, NONE, NONE, NONE, NULL },
{ slash, '/', cpp_cmt, '/', '*', NONE, NONE, NULL },
{ slash, '*', c_cmt, '/', '*', NONE, NONE, NULL },
{ slash, DFL, code, '/', SELF, NONE, NONE, NULL },
{ cpp_cmt, '\n', code, ' ', '*', '/', SELF, NULL },
{ cpp_cmt, '*', cpp_ast, SELF, NONE, NONE, NONE, NULL },
{ cpp_cmt, DFL, cpp_cmt, SELF, NONE, NONE, NONE, NULL },
{ cpp_ast, '\n', code, ' ', '*', '/', SELF, NULL },
{ cpp_ast, '*', cpp_ast, SELF, NONE, NONE, NONE, NULL },
{ cpp_ast, '/', cpp_cmt, ' ', SELF, NONE, NONE,
"converted a '*/' inside a C++ comment to '* /'." },
{ cpp_ast, DFL, cpp_cmt, SELF, NONE, NONE, NONE, NULL },
{ c_cmt, '*', star, SELF, NONE, NONE, NONE, NULL },
{ c_cmt, DFL, c_cmt, SELF, NONE, NONE, NONE, NULL },
{ star, '/', code, SELF, NONE, NONE, NONE, NULL },
{ star, '*', star, SELF, NONE, NONE, NONE, NULL },
{ star, DFL, c_cmt, SELF, NONE, NONE, NONE, NULL },
};
static int convert(char *filename);
static char usage[] = "Usage: %s [-hv] <file>\n";
static char version[] = "version 1.1-without-publib\n";
int main(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "hv")) != EOF) {
switch (opt) {
case 'h':
case '?':
fprintf(stderr, usage, argv[0]);
case 'v':
fprintf(stderr, "%s", version);
}
}
if (optind != argc-1) {
fprintf(stderr, usage, argv[0]);
return EXIT_FAILURE;
}
if (convert(argv[optind]) != 0) {
fprintf(stderr, "conversion incomplete.\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
#define print(x) (void)((x) != NONE && printf("%c", (x) == SELF ? c : (x)))
static int convert(char *filename) {
enum state state;
const struct rule *p;
int c, i;
FILE *f;
f = fopen(filename, "r");
if (!f) {
fprintf(stderr, "couldn't open file %s for reading: %s\n",
filename, strerror(errno));
return -1;
}
state = code;
for (;;) {
c = getc(f);
if (c == EOF) {
if (ferror(f)) {
fprintf(stderr, "error reading %s: %s",
filename, strerror(errno));
return -1;
}
switch (state) {
case cpp_cmt:
/* need to terminate the last // comment */
printf(" */");
break;
case code:
/* do nothing 'cause all's good */
break;
default:
fprintf(stderr, "%s error, %s ends funnily",
__func__, filename);
return -1;
}
if (fflush(stdout) == EOF || ferror(stdout))
return -1;
return 0; /* everything seems to be OK */
}
for (i = 0; i < sizeof(fsm) / sizeof(fsm[0]); ++i) {
p = &fsm[i];
if (p->state == state && (p->c == c || p->c == DFL)) {
state = p->new_state;
print(p->print1);
print(p->print2);
print(p->print3);
print(p->print4);
if (p->warning != NULL)
fprintf(stderr, "%s %s %s", __func__,
filename, p->warning);
break;
}
}
}
/*NOTREACHED*/
}
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment