freebsd-skq/contrib/groff/refer/command.cc

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1996-09-07 16:18:32 +00:00
// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
groff 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 groff; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "refer.h"
#include "refid.h"
#include "search.h"
#include "command.h"
cset cs_field_name = csalpha;
class input_item {
input_item *next;
char *filename;
int first_lineno;
string buffer;
const char *ptr;
const char *end;
public:
input_item(string &, const char *, int = 1);
~input_item();
int get_char();
int peek_char();
void skip_char();
int get_location(const char **, int *);
friend class input_stack;
};
input_item::input_item(string &s, const char *fn, int ln)
: filename(strsave(fn)), first_lineno(ln)
{
buffer.move(s);
ptr = buffer.contents();
end = ptr + buffer.length();
}
input_item::~input_item()
{
a_delete filename;
}
inline int input_item::peek_char()
{
if (ptr >= end)
return EOF;
else
return (unsigned char)*ptr;
}
inline int input_item::get_char()
{
if (ptr >= end)
return EOF;
else
return (unsigned char)*ptr++;
}
inline void input_item::skip_char()
{
ptr++;
}
int input_item::get_location(const char **filenamep, int *linenop)
{
*filenamep = filename;
if (ptr == buffer.contents())
*linenop = first_lineno;
else {
int ln = first_lineno;
const char *e = ptr - 1;
for (const char *p = buffer.contents(); p < e; p++)
if (*p == '\n')
ln++;
*linenop = ln;
}
return 1;
}
class input_stack {
static input_item *top;
public:
static void init();
static int get_char();
static int peek_char();
static void skip_char() { top->skip_char(); }
static void push_file(const char *);
static void push_string(string &, const char *, int);
static void error(const char *format,
const errarg &arg1 = empty_errarg,
const errarg &arg2 = empty_errarg,
const errarg &arg3 = empty_errarg);
};
input_item *input_stack::top = 0;
void input_stack::init()
{
while (top) {
input_item *tem = top;
top = top->next;
delete tem;
}
}
int input_stack::get_char()
{
while (top) {
int c = top->get_char();
if (c >= 0)
return c;
input_item *tem = top;
top = top->next;
delete tem;
}
return -1;
}
int input_stack::peek_char()
{
while (top) {
int c = top->peek_char();
if (c >= 0)
return c;
input_item *tem = top;
top = top->next;
delete tem;
}
return -1;
}
void input_stack::push_file(const char *fn)
{
FILE *fp;
if (strcmp(fn, "-") == 0) {
fp = stdin;
fn = "<standard input>";
}
else {
errno = 0;
fp = fopen(fn, "r");
if (fp == 0) {
error("can't open `%1': %2", fn, strerror(errno));
return;
}
}
string buf;
int bol = 1;
int lineno = 1;
for (;;) {
int c = getc(fp);
if (bol && c == '.') {
// replace lines beginning with .R1 or .R2 with a blank line
c = getc(fp);
if (c == 'R') {
c = getc(fp);
if (c == '1' || c == '2') {
int cc = c;
c = getc(fp);
if (compatible_flag || c == ' ' || c == '\n' || c == EOF) {
while (c != '\n' && c != EOF)
c = getc(fp);
}
else {
buf += '.';
buf += 'R';
buf += cc;
}
}
else {
buf += '.';
buf += 'R';
}
}
else
buf += '.';
}
if (c == EOF)
break;
if (illegal_input_char(c))
error_with_file_and_line(fn, lineno,
"illegal input character code %1", int(c));
else {
buf += c;
if (c == '\n') {
bol = 1;
lineno++;
}
else
bol = 0;
}
}
if (fp != stdin)
fclose(fp);
if (buf.length() > 0 && buf[buf.length() - 1] != '\n')
buf += '\n';
input_item *it = new input_item(buf, fn);
it->next = top;
top = it;
}
void input_stack::push_string(string &s, const char *filename, int lineno)
{
input_item *it = new input_item(s, filename, lineno);
it->next = top;
top = it;
}
void input_stack::error(const char *format, const errarg &arg1,
const errarg &arg2, const errarg &arg3)
{
const char *filename;
int lineno;
for (input_item *it = top; it; it = it->next)
if (it->get_location(&filename, &lineno)) {
error_with_file_and_line(filename, lineno, format, arg1, arg2, arg3);
return;
}
::error(format, arg1, arg2, arg3);
}
void command_error(const char *format, const errarg &arg1,
const errarg &arg2, const errarg &arg3)
{
input_stack::error(format, arg1, arg2, arg3);
}
// # not recognized in ""
// \<newline> is recognized in ""
// # does not conceal newline
// if missing closing quote, word extends to end of line
// no special treatment of \ other than before newline
// \<newline> not recognized after #
// ; allowed as alternative to newline
// ; not recognized in ""
// don't clear word_buffer; just append on
// return -1 for EOF, 0 for newline, 1 for word
int get_word(string &word_buffer)
{
int c = input_stack::get_char();
for (;;) {
if (c == '#') {
do {
c = input_stack::get_char();
} while (c != '\n' && c != EOF);
break;
}
if (c == '\\' && input_stack::peek_char() == '\n')
input_stack::skip_char();
else if (c != ' ' && c != '\t')
break;
c = input_stack::get_char();
}
if (c == EOF)
return -1;
if (c == '\n' || c == ';')
return 0;
if (c == '"') {
for (;;) {
c = input_stack::peek_char();
if (c == EOF || c == '\n')
break;
input_stack::skip_char();
if (c == '"') {
int d = input_stack::peek_char();
if (d == '"')
input_stack::skip_char();
else
break;
}
else if (c == '\\') {
int d = input_stack::peek_char();
if (d == '\n')
input_stack::skip_char();
else
word_buffer += '\\';
}
else
word_buffer += c;
}
return 1;
}
word_buffer += c;
for (;;) {
c = input_stack::peek_char();
if (c == ' ' || c == '\t' || c == '\n' || c == '#' || c == ';')
break;
input_stack::skip_char();
if (c == '\\') {
int d = input_stack::peek_char();
if (d == '\n')
input_stack::skip_char();
else
word_buffer += '\\';
}
else
word_buffer += c;
}
return 1;
}
union argument {
const char *s;
int n;
};
// This is for debugging.
static void echo_command(int argc, argument *argv)
{
for (int i = 0; i < argc; i++)
fprintf(stderr, "%s\n", argv[i].s);
}
static void include_command(int argc, argument *argv)
{
assert(argc == 1);
input_stack::push_file(argv[0].s);
}
static void capitalize_command(int argc, argument *argv)
{
if (argc > 0)
capitalize_fields = argv[0].s;
else
capitalize_fields.clear();
}
static void accumulate_command(int, argument *)
{
accumulate = 1;
}
static void no_accumulate_command(int, argument *)
{
accumulate = 0;
}
static void move_punctuation_command(int, argument *)
{
move_punctuation = 1;
}
static void no_move_punctuation_command(int, argument *)
{
move_punctuation = 0;
}
static void sort_command(int argc, argument *argv)
{
if (argc == 0)
sort_fields = "AD";
else
sort_fields = argv[0].s;
accumulate = 1;
}
static void no_sort_command(int, argument *)
{
sort_fields.clear();
}
static void articles_command(int argc, argument *argv)
{
articles.clear();
int i;
for (i = 0; i < argc; i++) {
articles += argv[i].s;
articles += '\0';
}
int len = articles.length();
for (i = 0; i < len; i++)
articles[i] = cmlower(articles[i]);
}
static void database_command(int argc, argument *argv)
{
for (int i = 0; i < argc; i++)
database_list.add_file(argv[i].s);
}
static void default_database_command(int, argument *)
{
search_default = 1;
}
static void no_default_database_command(int, argument *)
{
search_default = 0;
}
static void bibliography_command(int argc, argument *argv)
{
const char *saved_filename = current_filename;
int saved_lineno = current_lineno;
int saved_label_in_text = label_in_text;
label_in_text = 0;
if (!accumulate)
fputs(".]<\n", stdout);
for (int i = 0; i < argc; i++)
do_bib(argv[i].s);
if (accumulate)
output_references();
else
fputs(".]>\n", stdout);
current_filename = saved_filename;
current_lineno = saved_lineno;
label_in_text = saved_label_in_text;
}
static void annotate_command(int argc, argument *argv)
{
if (argc > 0)
annotation_field = argv[0].s[0];
else
annotation_field = 'X';
if (argc == 2)
annotation_macro = argv[1].s;
else
annotation_macro = "AP";
}
static void no_annotate_command(int, argument *)
{
annotation_macro.clear();
annotation_field = -1;
}
static void reverse_command(int, argument *argv)
{
reverse_fields = argv[0].s;
}
static void no_reverse_command(int, argument *)
{
reverse_fields.clear();
}
static void abbreviate_command(int argc, argument *argv)
{
abbreviate_fields = argv[0].s;
period_before_initial = argc > 1 ? argv[1].s : ". ";
period_before_last_name = argc > 2 ? argv[2].s : ". ";
period_before_other = argc > 3 ? argv[3].s : ". ";
period_before_hyphen = argc > 4 ? argv[4].s : ".";
}
static void no_abbreviate_command(int, argument *)
{
abbreviate_fields.clear();
}
string search_ignore_fields;
static void search_ignore_command(int argc, argument *argv)
{
if (argc > 0)
search_ignore_fields = argv[0].s;
else
search_ignore_fields = "XYZ";
search_ignore_fields += '\0';
linear_ignore_fields = search_ignore_fields.contents();
}
static void no_search_ignore_command(int, argument *)
{
linear_ignore_fields = "";
}
static void search_truncate_command(int argc, argument *argv)
{
if (argc > 0)
linear_truncate_len = argv[0].n;
else
linear_truncate_len = 6;
}
static void no_search_truncate_command(int, argument *)
{
linear_truncate_len = -1;
}
static void discard_command(int argc, argument *argv)
{
if (argc == 0)
discard_fields = "XYZ";
else
discard_fields = argv[0].s;
accumulate = 1;
}
static void no_discard_command(int, argument *)
{
discard_fields.clear();
}
static void label_command(int, argument *argv)
{
set_label_spec(argv[0].s);
}
static void abbreviate_label_ranges_command(int argc, argument *argv)
{
abbreviate_label_ranges = 1;
label_range_indicator = argc > 0 ? argv[0].s : "-";
}
static void no_abbreviate_label_ranges_command(int, argument *)
{
abbreviate_label_ranges = 0;
}
static void label_in_reference_command(int, argument *)
{
label_in_reference = 1;
}
static void no_label_in_reference_command(int, argument *)
{
label_in_reference = 0;
}
static void label_in_text_command(int, argument *)
{
label_in_text = 1;
}
static void no_label_in_text_command(int, argument *)
{
label_in_text = 0;
}
static void sort_adjacent_labels_command(int, argument *)
{
sort_adjacent_labels = 1;
}
static void no_sort_adjacent_labels_command(int, argument *)
{
sort_adjacent_labels = 0;
}
static void date_as_label_command(int argc, argument *argv)
{
if (set_date_label_spec(argc > 0 ? argv[0].s : "D%a*"))
date_as_label = 1;
}
static void no_date_as_label_command(int, argument *)
{
date_as_label = 0;
}
static void short_label_command(int, argument *argv)
{
if (set_short_label_spec(argv[0].s))
short_label_flag = 1;
}
static void no_short_label_command(int, argument *)
{
short_label_flag = 0;
}
static void compatible_command(int, argument *)
{
compatible_flag = 1;
}
static void no_compatible_command(int, argument *)
{
compatible_flag = 0;
}
static void join_authors_command(int argc, argument *argv)
{
join_authors_exactly_two = argv[0].s;
join_authors_default = argc > 1 ? argv[1].s : argv[0].s;
join_authors_last_two = argc == 3 ? argv[2].s : argv[0].s;
}
static void bracket_label_command(int, argument *argv)
{
pre_label = argv[0].s;
post_label = argv[1].s;
sep_label = argv[2].s;
}
static void separate_label_second_parts_command(int, argument *argv)
{
separate_label_second_parts = argv[0].s;
}
static void et_al_command(int argc, argument *argv)
{
et_al = argv[0].s;
et_al_min_elide = argv[1].n;
if (et_al_min_elide < 1)
et_al_min_elide = 1;
et_al_min_total = argc >= 3 ? argv[2].n : 0;
}
static void no_et_al_command(int, argument *)
{
et_al.clear();
et_al_min_elide = 0;
}
typedef void (*command_t)(int, argument *);
/* arg_types is a string describing the numbers and types of arguments.
s means a string, i means an integer, f is a list of fields, F is
a single field,
? means that the previous argument is optional, * means that the
previous argument can occur any number of times. */
struct {
const char *name;
command_t func;
const char *arg_types;
} command_table[] = {
{ "include", include_command, "s" },
{ "echo", echo_command, "s*" },
{ "capitalize", capitalize_command, "f?" },
{ "accumulate", accumulate_command, "" },
{ "no-accumulate", no_accumulate_command, "" },
{ "move-punctuation", move_punctuation_command, "" },
{ "no-move-punctuation", no_move_punctuation_command, "" },
{ "sort", sort_command, "s?" },
{ "no-sort", no_sort_command, "" },
{ "articles", articles_command, "s*" },
{ "database", database_command, "ss*" },
{ "default-database", default_database_command, "" },
{ "no-default-database", no_default_database_command, "" },
{ "bibliography", bibliography_command, "ss*" },
{ "annotate", annotate_command, "F?s?" },
{ "no-annotate", no_annotate_command, "" },
{ "reverse", reverse_command, "s" },
{ "no-reverse", no_reverse_command, "" },
{ "abbreviate", abbreviate_command, "ss?s?s?s?" },
{ "no-abbreviate", no_abbreviate_command, "" },
{ "search-ignore", search_ignore_command, "f?" },
{ "no-search-ignore", no_search_ignore_command, "" },
{ "search-truncate", search_truncate_command, "i?" },
{ "no-search-truncate", no_search_truncate_command, "" },
{ "discard", discard_command, "f?" },
{ "no-discard", no_discard_command, "" },
{ "label", label_command, "s" },
{ "abbreviate-label-ranges", abbreviate_label_ranges_command, "s?" },
{ "no-abbreviate-label-ranges", no_abbreviate_label_ranges_command, "" },
{ "label-in-reference", label_in_reference_command, "" },
{ "no-label-in-reference", no_label_in_reference_command, "" },
{ "label-in-text", label_in_text_command, "" },
{ "no-label-in-text", no_label_in_text_command, "" },
{ "sort-adjacent-labels", sort_adjacent_labels_command, "" },
{ "no-sort-adjacent-labels", no_sort_adjacent_labels_command, "" },
{ "date-as-label", date_as_label_command, "s?" },
{ "no-date-as-label", no_date_as_label_command, "" },
{ "short-label", short_label_command, "s" },
{ "no-short-label", no_short_label_command, "" },
{ "compatible", compatible_command, "" },
{ "no-compatible", no_compatible_command, "" },
{ "join-authors", join_authors_command, "sss?" },
{ "bracket-label", bracket_label_command, "sss" },
{ "separate-label-second-parts", separate_label_second_parts_command, "s" },
{ "et-al", et_al_command, "sii?" },
{ "no-et-al", no_et_al_command, "" },
};
static int check_args(const char *types, const char *name,
int argc, argument *argv)
{
int argno = 0;
while (*types) {
if (argc == 0) {
if (types[1] == '?')
break;
else if (types[1] == '*') {
assert(types[2] == '\0');
break;
}
else {
input_stack::error("missing argument for command `%1'", name);
return 0;
}
}
switch (*types) {
case 's':
break;
case 'i':
{
char *ptr;
long n = strtol(argv->s, &ptr, 10);
if ((n == 0 && ptr == argv->s)
|| *ptr != '\0') {
input_stack::error("argument %1 for command `%2' must be an integer",
argno + 1, name);
return 0;
}
argv->n = (int)n;
break;
}
case 'f':
{
for (const char *ptr = argv->s; *ptr != '\0'; ptr++)
if (!cs_field_name(*ptr)) {
input_stack::error("argument %1 for command `%2' must be a list of fields",
argno + 1, name);
return 0;
}
break;
}
case 'F':
if (argv->s[0] == '\0' || argv->s[1] != '\0'
|| !cs_field_name(argv->s[0])) {
input_stack::error("argument %1 for command `%2' must be a field name",
argno + 1, name);
return 0;
}
break;
default:
assert(0);
}
if (types[1] == '?')
types += 2;
else if (types[1] != '*')
types += 1;
--argc;
++argv;
++argno;
}
if (argc > 0) {
input_stack::error("too many arguments for command `%1'", name);
return 0;
}
return 1;
}
static void execute_command(const char *name, int argc, argument *argv)
{
for (int i = 0; i < sizeof(command_table)/sizeof(command_table[0]); i++)
if (strcmp(name, command_table[i].name) == 0) {
if (check_args(command_table[i].arg_types, name, argc, argv))
(*command_table[i].func)(argc, argv);
return;
}
input_stack::error("unknown command `%1'", name);
}
static void command_loop()
{
string command;
for (;;) {
command.clear();
int res = get_word(command);
if (res != 1) {
if (res == 0)
continue;
break;
}
int argc = 0;
command += '\0';
while ((res = get_word(command)) == 1) {
argc++;
command += '\0';
}
argument *argv = new argument[argc];
const char *ptr = command.contents();
for (int i = 0; i < argc; i++)
argv[i].s = ptr = strchr(ptr, '\0') + 1;
execute_command(command.contents(), argc, argv);
a_delete argv;
if (res == -1)
break;
}
}
void process_commands(const char *file)
{
input_stack::init();
input_stack::push_file(file);
command_loop();
}
void process_commands(string &s, const char *file, int lineno)
{
input_stack::init();
input_stack::push_string(s, file, lineno);
command_loop();
}