/* $Id$ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
* 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) /* Max input line 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. */
u_long bufsz; /* Input buffer size. */
char *in; /* Input file name. */
int fdin; /* Input file desc. */
};
extern char *__progname;
static int getsopts(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 *);
#ifdef __linux__
extern int getsubopt(char **, char *const *, char **);
#endif
/*
* Print our and our caller's usage message.
*/
void
mmain_usage(const char *help)
{
warnx("usage: %s %s%s[-v] [-Wwarn...] [infile]", __progname,
help ? help : "", help ? " " : "");
}
/*
* 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");
p->in = "-";
p->fdin = STDIN_FILENO;
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 *u, void *arg,
int (*getopt_cb)(void *, int, const char *))
{
int c;
char opts[32]; /* XXX */
size_t sz;
extern int optind;
extern int optreset;
sz = strlcpy(opts, "vW:", 32);
assert(sz < 32);
if (u) {
sz = strlcat(opts, u, 32);
assert(sz < 32);
}
/* LINTED */
while (-1 != (c = getopt(argc, argv, opts)))
switch (c) {
case ('v'):
p->dbg++;
break;
case ('W'):
if ( ! getsopts(p, optarg))
return(0);
break;
case ('?'):
mmain_usage(help);
return(0);
default:
assert(getopt_cb);
if ((*getopt_cb)(arg, c, optarg))
break;
return(0);
}
argv += optind;
if ((argc -= optind) > 0)
p->in = *argv++;
return(1);
}
__dead void
mmain_exit(struct mmain *p, int code)
{
if (p->mdoc)
mdoc_free(p->mdoc);
free(p);
exit(code);
}
struct mdoc *
mmain_mdoc(struct mmain *p)
{
struct stat st;
int c;
struct mdoc_cb cb;
cb.mdoc_err = msg_err;
cb.mdoc_warn = msg_warn;
cb.mdoc_msg = msg_msg;
if (0 != strcmp(p->in, "-"))
if (-1 == (p->fdin = open(p->in, O_RDONLY, 0))) {
warn("%s", p->in);
return(0);
}
/* Allocate a buffer to be BUFSIZ/block size. */
if (-1 == fstat(p->fdin, &st)) {
warn("%s", p->in);
p->bufsz = BUFSIZ;
} else
p->bufsz = MAX(st.st_blksize, BUFSIZ);
p->buf = malloc(p->bufsz);
if (NULL == p->buf)
err(1, "malloc");
/* Allocate the parser. */
p->mdoc = mdoc_alloc(p, &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);
}
static int
getsopts(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:
return(0);
}
return(1);
}
static int
parse(struct mmain *p)
{
ssize_t sz, i;
size_t pos;
char line[MD_LINE_SZ];
int lnn;
/*
* This is a little more complicated than fgets. TODO: have
* some benchmarks that show it's faster (note that I want to
* check many, many manuals simultaneously, so speed is
* important). Fill a buffer (sized to the block size) with a
* single read, then parse \n-terminated lines into a line
* buffer, which is passed to the parser. Hard-code the line
* buffer to a particular size -- a reasonable assumption.
*/
for (lnn = 1, 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 < sz; i++) {
if ('\n' != p->buf[i]) {
if (pos < sizeof(line)) {
line[(int)pos++] = p->buf[(int)i];
continue;
}
warnx("%s: line %d too long", p->in, lnn);
return(0);
}
line[(int)pos] = 0;
if ( ! mdoc_parseln(p->mdoc, lnn, line))
return(0);
lnn++;
pos = 0;
}
}
return(mdoc_endparse(p->mdoc));
}
static int
msg_err(void *arg, int line, int col, const char *msg)
{
struct mmain *p;
p = (struct mmain *)arg;
warnx("%s:%d: error: %s (column %d)",
p->in, line, msg, col);
return(0);
}
static void
msg_msg(void *arg, int line, int col, const char *msg)
{
struct mmain *p;
p = (struct mmain *)arg;
if (0 == p->dbg)
return;
warnx("%s:%d: debug: %s (column %d)",
p->in, line, msg, col);
}
static int
msg_warn(void *arg, int line, int col,
enum mdoc_warn type, const char *msg)
{
struct mmain *p;
p = (struct mmain *)arg;
switch (type) {
case (WARN_COMPAT):
if (p->warn & MD_WARN_COMPAT)
break;
return(1);
case (WARN_SYNTAX):
if (p->warn & MD_WARN_SYNTAX)
break;
return(1);
}
warnx("%s:%d: warning: %s (column %d)",
p->in, line, msg, col);
if ( ! (p->warn & MD_WARN_ERR))
return(1);
warnx("%s: considering warnings as errors", __progname);
return(0);
}
