/* $Id$ */
/*
* Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/stat.h>
#include <sys/param.h>
#include <assert.h>
#include <fcntl.h>
#include <err.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mmain.h"
#define MD_LINE_SZ (256) /* Input line step-size. */
struct mmain {
int warn; /* Warning flags. */
#define MD_WARN_SYNTAX (1 << 0) /* Show syntax warnings. */
#define MD_WARN_COMPAT (1 << 1) /* Show compat warnings. */
#define MD_WARN_ALL (0x03) /* Show all warnings. */
#define MD_WARN_ERR (1 << 2) /* Make warnings->errors. */
int dbg; /* Debug level. */
struct mdoc *mdoc; /* Active parser. */
char *buf; /* Input buffer. */
size_t bufsz; /* Input buffer size. */
const char *in; /* Input file name. */
int fdin; /* Input file desc. */
int pflags; /* Parse flags. */
};
extern char *__progname;
static void usage(const char *, const char *);
static int optswarn(struct mmain *, char *);
static int optsopt(struct mmain *, char *);
static int parse(struct mmain *);
static void msg_msg(void *, int, int, const char *);
static int msg_err(void *, int, int, const char *);
static int msg_warn(void *, int, int,
enum mdoc_warn, const char *);
/*
* Print our and our caller's usage message.
*/
void
usage(const char *help, const char *args)
{
warnx("usage: %s %s%s[-v] [-foption...] [-Wwarn...]%s%s",
__progname,
help ? help : "", help ? " " : "",
args ? " " : "", args ? args : "");
}
/*
* Allocate the convenience library and initialise some values.
*/
struct mmain *
mmain_alloc(void)
{
struct mmain *p;
if (NULL == (p = calloc(1, sizeof(struct mmain))))
err(1, "malloc");
return(p);
}
/*
* Parse command-line options. Accepts a small (<28 char) opstring "u"
* parameter (e.g. "ho:") or NULL, a corresponding "help" string (e.g.
* "[-h] [-o output]" or NULL, a callback function for parsed arguments
* and an opaque pointer argument for that function.
*/
int
mmain_getopt(struct mmain *p, int argc, char *argv[],
const char *help, const char *args,
const char *u, void *arg,
int (*getopt_cb)(void *, int, char *))
{
int c;
char opts[32]; /* XXX */
size_t sz;
extern int optind;
sz = strlcpy(opts, "VvW:f:", 32);
assert(sz < 32);
if (u) {
sz = strlcat(opts, u, 32);
assert(sz < 32);
}
optind = 1;
/* LINTED */
while (-1 != (c = getopt(argc, argv, opts)))
switch (c) {
case ('f'):
if ( ! optsopt(p, optarg))
mmain_exit(p, 1);
break;
case ('v'):
p->dbg++;
break;
case ('V'):
(void)printf("%s %s\n", __progname, VERSION);
mmain_exit(p, 0);
/* NOTREACHED */
case ('W'):
if ( ! optswarn(p, optarg))
mmain_exit(p, 1);
break;
case ('?'):
usage(help, args);
mmain_exit(p, 1);
/* NOTREACHED */
default:
assert(getopt_cb);
if ((*getopt_cb)(arg, c, optarg))
break;
mmain_exit(p, 1);
/* NOTREACHED */
}
return(optind);
}
void
mmain_reset(struct mmain *p)
{
if (p->mdoc)
mdoc_free(p->mdoc);
p->mdoc = NULL;
}
void
mmain_free(struct mmain *p)
{
if (p->mdoc)
mdoc_free(p->mdoc);
free(p);
}
__dead void
mmain_exit(struct mmain *p, int code)
{
mmain_free(p);
exit(code);
}
void
mmain_prepare(struct mmain *p, const char *in)
{
struct stat st;
if ((p->in = in)) {
if (-1 == (p->fdin = open(p->in, O_RDONLY, 0))) {
warn("%s", p->in);
mmain_exit(p, 1);
}
} else {
p->fdin = STDIN_FILENO;
p->in = "-";
}
if (-1 == fstat(p->fdin, &st)) {
warn("%s", p->in);
p->bufsz = BUFSIZ;
} else
p->bufsz = (unsigned)BUFSIZ > st.st_blksize ?
(size_t)BUFSIZ : st.st_blksize;
if (NULL == (p->buf = realloc(p->buf, p->bufsz)))
err(1, "realloc");
}
struct mdoc *
mmain_process(struct mmain *p)
{
int c;
struct mdoc_cb cb;
/* XXX - in mmain_alloc.*/
cb.mdoc_err = msg_err;
cb.mdoc_warn = msg_warn;
cb.mdoc_msg = msg_msg;
/* Allocate the parser. */
p->mdoc = mdoc_alloc(p, p->pflags, &cb);
/* Parse the input file. */
c = parse(p);
free(p->buf);
if (STDIN_FILENO != p->fdin)
if (-1 == close(p->fdin))
warn("%s", p->in);
return(c ? p->mdoc : NULL);
}
struct mdoc *
mmain_mdoc(struct mmain *p, const char *in)
{
mmain_prepare(p, in);
return(mmain_process(p));
}
static int
optsopt(struct mmain *p, char *arg)
{
char *v;
char *toks[] = { "ign-scope", "ign-escape",
"ign-macro", NULL };
while (*arg)
switch (getsubopt(&arg, toks, &v)) {
case (0):
p->pflags |= MDOC_IGN_SCOPE;
break;
case (1):
p->pflags |= MDOC_IGN_ESCAPE;
break;
case (2):
p->pflags |= MDOC_IGN_MACRO;
break;
default:
warnx("unknown -f argument");
return(0);
}
return(1);
}
static int
optswarn(struct mmain *p, char *arg)
{
char *v;
char *toks[] = { "all", "compat",
"syntax", "error", NULL };
while (*arg)
switch (getsubopt(&arg, toks, &v)) {
case (0):
p->warn |= MD_WARN_ALL;
break;
case (1):
p->warn |= MD_WARN_COMPAT;
break;
case (2):
p->warn |= MD_WARN_SYNTAX;
break;
case (3):
p->warn |= MD_WARN_ERR;
break;
default:
warnx("unknown -W argument");
return(0);
}
return(1);
}
static int
parse(struct mmain *p)
{
ssize_t sz;
int j, i, pos, len, lnn;
char *ln;
for (ln = NULL, lnn = 1, len = pos = 0; ; ) {
if (-1 == (sz = read(p->fdin, p->buf, p->bufsz))) {
warn("%s", p->in);
return(0);
} else if (0 == sz)
break;
for (i = 0; i < (int)sz; i++) {
if (pos >= len) {
len += MD_LINE_SZ;
ln = realloc(ln, (size_t)len);
if (NULL == ln)
err(1, "realloc");
}
if ('\n' != p->buf[i]) {
ln[pos++] = p->buf[i];
continue;
}
/* Check for escaped newline. */
if (pos > 0 && '\\' == ln[pos - 1]) {
for (j = pos - 1; j >= 0; j--)
if ('\\' != ln[j])
break;
if ( ! ((pos - j) % 2)) {
pos--;
lnn++;
continue;
}
}
ln[pos] = 0;
if ( ! mdoc_parseln(p->mdoc, lnn, ln)) {
free(ln);
return(0);
}
lnn++;
pos = 0;
}
}
if (ln)
free(ln);
if (pos > 0)
warnx("%s: file not eof-terminated", p->in);
return(mdoc_endparse(p->mdoc));
}
