1166 lines
24 KiB
C++
1166 lines
24 KiB
C++
// -*- 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 "eqn.h"
|
|
#include "eqn.tab.h"
|
|
#include "stringclass.h"
|
|
#include "ptable.h"
|
|
|
|
struct definition {
|
|
char is_macro;
|
|
char is_simple;
|
|
union {
|
|
int tok;
|
|
char *contents;
|
|
};
|
|
definition();
|
|
~definition();
|
|
};
|
|
|
|
definition::definition() : is_macro(1), is_simple(0)
|
|
{
|
|
contents = 0;
|
|
}
|
|
|
|
definition::~definition()
|
|
{
|
|
if (is_macro)
|
|
a_delete contents;
|
|
}
|
|
|
|
declare_ptable(definition)
|
|
implement_ptable(definition)
|
|
|
|
PTABLE(definition) macro_table;
|
|
|
|
static struct {
|
|
const char *name;
|
|
int token;
|
|
} token_table[] = {
|
|
{ "over", OVER },
|
|
{ "smallover", SMALLOVER },
|
|
{ "sqrt", SQRT },
|
|
{ "sub", SUB },
|
|
{ "sup", SUP },
|
|
{ "lpile", LPILE },
|
|
{ "rpile", RPILE },
|
|
{ "cpile", CPILE },
|
|
{ "pile", PILE },
|
|
{ "left", LEFT },
|
|
{ "right", RIGHT },
|
|
{ "to", TO },
|
|
{ "from", FROM },
|
|
{ "size", SIZE },
|
|
{ "font", FONT },
|
|
{ "roman", ROMAN },
|
|
{ "bold", BOLD },
|
|
{ "italic", ITALIC },
|
|
{ "fat", FAT },
|
|
{ "bar", BAR },
|
|
{ "under", UNDER },
|
|
{ "accent", ACCENT },
|
|
{ "uaccent", UACCENT },
|
|
{ "above", ABOVE },
|
|
{ "fwd", FWD },
|
|
{ "back", BACK },
|
|
{ "down", DOWN },
|
|
{ "up", UP },
|
|
{ "matrix", MATRIX },
|
|
{ "col", COL },
|
|
{ "lcol", LCOL },
|
|
{ "rcol", RCOL },
|
|
{ "ccol", CCOL },
|
|
{ "mark", MARK },
|
|
{ "lineup", LINEUP },
|
|
{ "space", SPACE },
|
|
{ "gfont", GFONT },
|
|
{ "gsize", GSIZE },
|
|
{ "define", DEFINE },
|
|
{ "sdefine", SDEFINE },
|
|
{ "ndefine", NDEFINE },
|
|
{ "tdefine", TDEFINE },
|
|
{ "undef", UNDEF },
|
|
{ "ifdef", IFDEF },
|
|
{ "include", INCLUDE },
|
|
{ "copy", INCLUDE },
|
|
{ "delim", DELIM },
|
|
{ "chartype", CHARTYPE },
|
|
{ "type", TYPE },
|
|
{ "vcenter", VCENTER },
|
|
{ "set", SET },
|
|
{ "opprime", PRIME },
|
|
{ "grfont", GRFONT },
|
|
{ "gbfont", GBFONT },
|
|
{ "split", SPLIT },
|
|
{ "nosplit", NOSPLIT },
|
|
{ "special", SPECIAL },
|
|
};
|
|
|
|
static struct {
|
|
const char *name;
|
|
const char *def;
|
|
} def_table[] = {
|
|
{ "ALPHA", "\\(*A" },
|
|
{ "BETA", "\\(*B" },
|
|
{ "CHI", "\\(*X" },
|
|
{ "DELTA", "\\(*D" },
|
|
{ "EPSILON", "\\(*E" },
|
|
{ "ETA", "\\(*Y" },
|
|
{ "GAMMA", "\\(*G" },
|
|
{ "IOTA", "\\(*I" },
|
|
{ "KAPPA", "\\(*K" },
|
|
{ "LAMBDA", "\\(*L" },
|
|
{ "MU", "\\(*M" },
|
|
{ "NU", "\\(*N" },
|
|
{ "OMEGA", "\\(*W" },
|
|
{ "OMICRON", "\\(*O" },
|
|
{ "PHI", "\\(*F" },
|
|
{ "PI", "\\(*P" },
|
|
{ "PSI", "\\(*Q" },
|
|
{ "RHO", "\\(*R" },
|
|
{ "SIGMA", "\\(*S" },
|
|
{ "TAU", "\\(*T" },
|
|
{ "THETA", "\\(*H" },
|
|
{ "UPSILON", "\\(*U" },
|
|
{ "XI", "\\(*C" },
|
|
{ "ZETA", "\\(*Z" },
|
|
{ "Alpha", "\\(*A" },
|
|
{ "Beta", "\\(*B" },
|
|
{ "Chi", "\\(*X" },
|
|
{ "Delta", "\\(*D" },
|
|
{ "Epsilon", "\\(*E" },
|
|
{ "Eta", "\\(*Y" },
|
|
{ "Gamma", "\\(*G" },
|
|
{ "Iota", "\\(*I" },
|
|
{ "Kappa", "\\(*K" },
|
|
{ "Lambda", "\\(*L" },
|
|
{ "Mu", "\\(*M" },
|
|
{ "Nu", "\\(*N" },
|
|
{ "Omega", "\\(*W" },
|
|
{ "Omicron", "\\(*O" },
|
|
{ "Phi", "\\(*F" },
|
|
{ "Pi", "\\(*P" },
|
|
{ "Psi", "\\(*Q" },
|
|
{ "Rho", "\\(*R" },
|
|
{ "Sigma", "\\(*S" },
|
|
{ "Tau", "\\(*T" },
|
|
{ "Theta", "\\(*H" },
|
|
{ "Upsilon", "\\(*U" },
|
|
{ "Xi", "\\(*C" },
|
|
{ "Zeta", "\\(*Z" },
|
|
{ "alpha", "\\(*a" },
|
|
{ "beta", "\\(*b" },
|
|
{ "chi", "\\(*x" },
|
|
{ "delta", "\\(*d" },
|
|
{ "epsilon", "\\(*e" },
|
|
{ "eta", "\\(*y" },
|
|
{ "gamma", "\\(*g" },
|
|
{ "iota", "\\(*i" },
|
|
{ "kappa", "\\(*k" },
|
|
{ "lambda", "\\(*l" },
|
|
{ "mu", "\\(*m" },
|
|
{ "nu", "\\(*n" },
|
|
{ "omega", "\\(*w" },
|
|
{ "omicron", "\\(*o" },
|
|
{ "phi", "\\(*f" },
|
|
{ "pi", "\\(*p" },
|
|
{ "psi", "\\(*q" },
|
|
{ "rho", "\\(*r" },
|
|
{ "sigma", "\\(*s" },
|
|
{ "tau", "\\(*t" },
|
|
{ "theta", "\\(*h" },
|
|
{ "upsilon", "\\(*u" },
|
|
{ "xi", "\\(*c" },
|
|
{ "zeta", "\\(*z" },
|
|
{ "max", "{type \"operator\" roman \"max\"}" },
|
|
{ "min", "{type \"operator\" roman \"min\"}" },
|
|
{ "lim", "{type \"operator\" roman \"lim\"}" },
|
|
{ "sin", "{type \"operator\" roman \"sin\"}" },
|
|
{ "cos", "{type \"operator\" roman \"cos\"}" },
|
|
{ "tan", "{type \"operator\" roman \"tan\"}" },
|
|
{ "sinh", "{type \"operator\" roman \"sinh\"}" },
|
|
{ "cosh", "{type \"operator\" roman \"cosh\"}" },
|
|
{ "tanh", "{type \"operator\" roman \"tanh\"}" },
|
|
{ "arc", "{type \"operator\" roman \"arc\"}" },
|
|
{ "log", "{type \"operator\" roman \"log\"}" },
|
|
{ "ln", "{type \"operator\" roman \"ln\"}" },
|
|
{ "exp", "{type \"operator\" roman \"exp\"}" },
|
|
{ "Re", "{type \"operator\" roman \"Re\"}" },
|
|
{ "Im", "{type \"operator\" roman \"Im\"}" },
|
|
{ "det", "{type \"operator\" roman \"det\"}" },
|
|
{ "and", "{roman \"and\"}" },
|
|
{ "if", "{roman \"if\"}" },
|
|
{ "for", "{roman \"for\"}" },
|
|
{ "sum", "{type \"operator\" vcenter size +5 \\(*S}" },
|
|
{ "prod", "{type \"operator\" vcenter size +5 \\(*P}" },
|
|
{ "int", "{type \"operator\" vcenter size +8 \\(is}" },
|
|
{ "union", "{type \"operator\" vcenter size +5 \\(cu}" },
|
|
{ "inter", "{type \"operator\" vcenter size +5 \\(ca}" },
|
|
{ "times", "type \"binary\" \\(mu" },
|
|
{ "ldots", "type \"inner\" { . . . }" },
|
|
{ "inf", "\\(if" },
|
|
{ "partial", "\\(pd" },
|
|
{ "nothing", "\"\"" },
|
|
{ "half", "{1 smallover 2}" },
|
|
{ "hat_def", "roman \"^\"" },
|
|
{ "hat", "accent { hat_def }" },
|
|
{ "dot_def", "back 15 \"\\v'-52M'.\\v'52M'\"" },
|
|
{ "dot", "accent { dot_def }" },
|
|
{ "dotdot_def", "back 25 \"\\v'-52M'..\\v'52M'\"" },
|
|
{ "dotdot", "accent { dotdot_def }" },
|
|
{ "tilde_def", "\"~\"" },
|
|
{ "tilde", "accent { tilde_def }" },
|
|
{ "utilde_def", "\"\\v'75M'~\\v'-75M'\"" },
|
|
{ "utilde", "uaccent { utilde_def }" },
|
|
{ "vec_def", "up 52 size -5 \\(->" },
|
|
{ "vec", "accent { vec_def }" },
|
|
{ "dyad_def", "up 52 size -5 {\\(<- back 60 \\(->}" },
|
|
{ "dyad", "accent { dyad_def }" },
|
|
{ "==", "type \"relation\" \\(==" },
|
|
{ "!=", "type \"relation\" \\(!=" },
|
|
{ "+-", "type \"binary\" \\(+-" },
|
|
{ "->", "type \"relation\" \\(->" },
|
|
{ "<-", "type \"relation\" \\(<-" },
|
|
{ "<<", "{ < back 20 < }" },
|
|
{ ">>", "{ > back 20 > }" },
|
|
{ "...", "type \"inner\" vcenter { . . . }" },
|
|
{ "prime", "'" },
|
|
{ "approx", "type \"relation\" \"\\(~=\"" },
|
|
{ "grad", "\\(gr" },
|
|
{ "del", "\\(gr" },
|
|
{ "cdot", "type \"binary\" vcenter ." },
|
|
{ "dollar", "$" },
|
|
};
|
|
|
|
void init_table(const char *device)
|
|
{
|
|
int i;
|
|
for (i = 0; i < sizeof(token_table)/sizeof(token_table[0]); i++) {
|
|
definition *def = new definition;
|
|
def->is_macro = 0;
|
|
def->tok = token_table[i].token;
|
|
macro_table.define(token_table[i].name, def);
|
|
}
|
|
for (i = 0; i < sizeof(def_table)/sizeof(def_table[0]); i++) {
|
|
definition *def = new definition;
|
|
def->is_macro = 1;
|
|
def->contents = strsave(def_table[i].def);
|
|
def->is_simple = 1;
|
|
macro_table.define(def_table[i].name, def);
|
|
}
|
|
definition *def = new definition;
|
|
def->is_macro = 1;
|
|
def->contents = strsave("1");
|
|
macro_table.define(device, def);
|
|
}
|
|
|
|
class input {
|
|
input *next;
|
|
public:
|
|
input(input *p);
|
|
virtual ~input();
|
|
virtual int get() = 0;
|
|
virtual int peek() = 0;
|
|
virtual int get_location(char **, int *);
|
|
|
|
friend int get_char();
|
|
friend int peek_char();
|
|
friend int get_location(char **, int *);
|
|
friend void init_lex(const char *str, const char *filename, int lineno);
|
|
};
|
|
|
|
class file_input : public input {
|
|
FILE *fp;
|
|
char *filename;
|
|
int lineno;
|
|
string line;
|
|
const char *ptr;
|
|
int read_line();
|
|
public:
|
|
file_input(FILE *, const char *, input *);
|
|
~file_input();
|
|
int get();
|
|
int peek();
|
|
int get_location(char **, int *);
|
|
};
|
|
|
|
|
|
class macro_input : public input {
|
|
char *s;
|
|
char *p;
|
|
public:
|
|
macro_input(const char *, input *);
|
|
~macro_input();
|
|
int get();
|
|
int peek();
|
|
};
|
|
|
|
class top_input : public macro_input {
|
|
char *filename;
|
|
int lineno;
|
|
public:
|
|
top_input(const char *, const char *, int, input *);
|
|
~top_input();
|
|
int get();
|
|
int get_location(char **, int *);
|
|
};
|
|
|
|
class argument_macro_input: public input {
|
|
char *s;
|
|
char *p;
|
|
char *ap;
|
|
int argc;
|
|
char *argv[9];
|
|
public:
|
|
argument_macro_input(const char *, int, char **, input *);
|
|
~argument_macro_input();
|
|
int get();
|
|
int peek();
|
|
};
|
|
|
|
input::input(input *x) : next(x)
|
|
{
|
|
}
|
|
|
|
input::~input()
|
|
{
|
|
}
|
|
|
|
int input::get_location(char **, int *)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
file_input::file_input(FILE *f, const char *fn, input *p)
|
|
: input(p), lineno(0), ptr("")
|
|
{
|
|
fp = f;
|
|
filename = strsave(fn);
|
|
}
|
|
|
|
file_input::~file_input()
|
|
{
|
|
a_delete filename;
|
|
fclose(fp);
|
|
}
|
|
|
|
int file_input::read_line()
|
|
{
|
|
for (;;) {
|
|
line.clear();
|
|
lineno++;
|
|
for (;;) {
|
|
int c = getc(fp);
|
|
if (c == EOF)
|
|
break;
|
|
else if (illegal_input_char(c))
|
|
lex_error("illegal input character code %1", c);
|
|
else {
|
|
line += char(c);
|
|
if (c == '\n')
|
|
break;
|
|
}
|
|
}
|
|
if (line.length() == 0)
|
|
return 0;
|
|
if (!(line.length() >= 3 && line[0] == '.' && line[1] == 'E'
|
|
&& (line[2] == 'Q' || line[2] == 'N')
|
|
&& (line.length() == 3 || line[3] == ' ' || line[3] == '\n'
|
|
|| compatible_flag))) {
|
|
line += '\0';
|
|
ptr = line.contents();
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
int file_input::get()
|
|
{
|
|
if (*ptr != '\0' || read_line())
|
|
return *ptr++ & 0377;
|
|
else
|
|
return EOF;
|
|
}
|
|
|
|
int file_input::peek()
|
|
{
|
|
if (*ptr != '\0' || read_line())
|
|
return *ptr;
|
|
else
|
|
return EOF;
|
|
}
|
|
|
|
int file_input::get_location(char **fnp, int *lnp)
|
|
{
|
|
*fnp = filename;
|
|
*lnp = lineno;
|
|
return 1;
|
|
}
|
|
|
|
macro_input::macro_input(const char *str, input *x) : input(x)
|
|
{
|
|
p = s = strsave(str);
|
|
}
|
|
|
|
macro_input::~macro_input()
|
|
{
|
|
a_delete s;
|
|
}
|
|
|
|
int macro_input::get()
|
|
{
|
|
if (p == 0 || *p == '\0')
|
|
return EOF;
|
|
else
|
|
return *p++ & 0377;
|
|
}
|
|
|
|
int macro_input::peek()
|
|
{
|
|
if (p == 0 || *p == '\0')
|
|
return EOF;
|
|
else
|
|
return *p & 0377;
|
|
}
|
|
|
|
top_input::top_input(const char *str, const char *fn, int ln, input *x)
|
|
: macro_input(str, x), lineno(ln)
|
|
{
|
|
filename = strsave(fn);
|
|
}
|
|
|
|
top_input::~top_input()
|
|
{
|
|
a_delete filename;
|
|
}
|
|
|
|
int top_input::get()
|
|
{
|
|
int c = macro_input::get();
|
|
if (c == '\n')
|
|
lineno++;
|
|
return c;
|
|
}
|
|
|
|
int top_input::get_location(char **fnp, int *lnp)
|
|
{
|
|
*fnp = filename;
|
|
*lnp = lineno;
|
|
return 1;
|
|
}
|
|
|
|
// Character representing $1. Must be illegal input character.
|
|
#define ARG1 14
|
|
|
|
argument_macro_input::argument_macro_input(const char *body, int ac,
|
|
char **av, input *x)
|
|
: input(x), argc(ac), ap(0)
|
|
{
|
|
int i;
|
|
for (i = 0; i < argc; i++)
|
|
argv[i] = av[i];
|
|
p = s = strsave(body);
|
|
int j = 0;
|
|
for (i = 0; s[i] != '\0'; i++)
|
|
if (s[i] == '$' && s[i+1] >= '0' && s[i+1] <= '9') {
|
|
if (s[i+1] != '0')
|
|
s[j++] = ARG1 + s[++i] - '1';
|
|
}
|
|
else
|
|
s[j++] = s[i];
|
|
s[j] = '\0';
|
|
}
|
|
|
|
|
|
argument_macro_input::~argument_macro_input()
|
|
{
|
|
for (int i = 0; i < argc; i++)
|
|
a_delete argv[i];
|
|
a_delete s;
|
|
}
|
|
|
|
int argument_macro_input::get()
|
|
{
|
|
if (ap) {
|
|
if (*ap != '\0')
|
|
return *ap++ & 0377;
|
|
ap = 0;
|
|
}
|
|
if (p == 0)
|
|
return EOF;
|
|
while (*p >= ARG1 && *p <= ARG1 + 8) {
|
|
int i = *p++ - ARG1;
|
|
if (i < argc && argv[i] != 0 && argv[i][0] != '\0') {
|
|
ap = argv[i];
|
|
return *ap++ & 0377;
|
|
}
|
|
}
|
|
if (*p == '\0')
|
|
return EOF;
|
|
return *p++ & 0377;
|
|
}
|
|
|
|
int argument_macro_input::peek()
|
|
{
|
|
if (ap) {
|
|
if (*ap != '\0')
|
|
return *ap & 0377;
|
|
ap = 0;
|
|
}
|
|
if (p == 0)
|
|
return EOF;
|
|
while (*p >= ARG1 && *p <= ARG1 + 8) {
|
|
int i = *p++ - ARG1;
|
|
if (i < argc && argv[i] != 0 && argv[i][0] != '\0') {
|
|
ap = argv[i];
|
|
return *ap & 0377;
|
|
}
|
|
}
|
|
if (*p == '\0')
|
|
return EOF;
|
|
return *p & 0377;
|
|
}
|
|
|
|
static input *current_input = 0;
|
|
|
|
/* we insert a newline between input from different levels */
|
|
|
|
int get_char()
|
|
{
|
|
if (current_input == 0)
|
|
return EOF;
|
|
else {
|
|
int c = current_input->get();
|
|
if (c != EOF)
|
|
return c;
|
|
else {
|
|
input *tem = current_input;
|
|
current_input = current_input->next;
|
|
delete tem;
|
|
return '\n';
|
|
}
|
|
}
|
|
}
|
|
|
|
int peek_char()
|
|
{
|
|
if (current_input == 0)
|
|
return EOF;
|
|
else {
|
|
int c = current_input->peek();
|
|
if (c != EOF)
|
|
return c;
|
|
else
|
|
return '\n';
|
|
}
|
|
}
|
|
|
|
int get_location(char **fnp, int *lnp)
|
|
{
|
|
for (input *p = current_input; p; p = p->next)
|
|
if (p->get_location(fnp, lnp))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
string token_buffer;
|
|
const int NCONTEXT = 4;
|
|
string context_ring[NCONTEXT];
|
|
int context_index = 0;
|
|
|
|
void flush_context()
|
|
{
|
|
for (int i = 0; i < NCONTEXT; i++)
|
|
context_ring[i] = "";
|
|
context_index = 0;
|
|
}
|
|
|
|
void show_context()
|
|
{
|
|
int i = context_index;
|
|
fputs(" context is\n\t", stderr);
|
|
for (;;) {
|
|
int j = (i + 1) % NCONTEXT;
|
|
if (j == context_index) {
|
|
fputs(">>> ", stderr);
|
|
put_string(context_ring[i], stderr);
|
|
fputs(" <<<", stderr);
|
|
break;
|
|
}
|
|
else if (context_ring[i].length() > 0) {
|
|
put_string(context_ring[i], stderr);
|
|
putc(' ', stderr);
|
|
}
|
|
i = j;
|
|
}
|
|
putc('\n', stderr);
|
|
}
|
|
|
|
void add_context(const string &s)
|
|
{
|
|
context_ring[context_index] = s;
|
|
context_index = (context_index + 1) % NCONTEXT;
|
|
}
|
|
|
|
void add_context(char c)
|
|
{
|
|
context_ring[context_index] = c;
|
|
context_index = (context_index + 1) % NCONTEXT;
|
|
}
|
|
|
|
void add_quoted_context(const string &s)
|
|
{
|
|
string &r = context_ring[context_index];
|
|
r = '"';
|
|
for (int i = 0; i < s.length(); i++)
|
|
if (s[i] == '"')
|
|
r += "\\\"";
|
|
else
|
|
r += s[i];
|
|
r += '"';
|
|
context_index = (context_index + 1) % NCONTEXT;
|
|
}
|
|
|
|
void init_lex(const char *str, const char *filename, int lineno)
|
|
{
|
|
while (current_input != 0) {
|
|
input *tem = current_input;
|
|
current_input = current_input->next;
|
|
delete tem;
|
|
}
|
|
current_input = new top_input(str, filename, lineno, 0);
|
|
flush_context();
|
|
}
|
|
|
|
|
|
void get_delimited_text()
|
|
{
|
|
char *filename;
|
|
int lineno;
|
|
int got_location = get_location(&filename, &lineno);
|
|
int start = get_char();
|
|
while (start == ' ' || start == '\t' || start == '\n')
|
|
start = get_char();
|
|
token_buffer.clear();
|
|
if (start == EOF) {
|
|
if (got_location)
|
|
error_with_file_and_line(filename, lineno,
|
|
"end of input while defining macro");
|
|
else
|
|
error("end of input while defining macro");
|
|
return;
|
|
}
|
|
for (;;) {
|
|
int c = get_char();
|
|
if (c == EOF) {
|
|
if (got_location)
|
|
error_with_file_and_line(filename, lineno,
|
|
"end of input while defining macro");
|
|
else
|
|
error("end of input while defining macro");
|
|
add_context(start + token_buffer);
|
|
return;
|
|
}
|
|
if (c == start)
|
|
break;
|
|
token_buffer += char(c);
|
|
}
|
|
add_context(start + token_buffer + start);
|
|
}
|
|
|
|
void interpolate_macro_with_args(const char *body)
|
|
{
|
|
char *argv[9];
|
|
int argc = 0;
|
|
int i;
|
|
for (i = 0; i < 9; i++)
|
|
argv[i] = 0;
|
|
int level = 0;
|
|
int c;
|
|
do {
|
|
token_buffer.clear();
|
|
for (;;) {
|
|
c = get_char();
|
|
if (c == EOF) {
|
|
lex_error("end of input while scanning macro arguments");
|
|
break;
|
|
}
|
|
if (level == 0 && (c == ',' || c == ')')) {
|
|
if (token_buffer.length() > 0) {
|
|
token_buffer += '\0';
|
|
argv[argc] = strsave(token_buffer.contents());
|
|
}
|
|
// for `foo()', argc = 0
|
|
if (argc > 0 || c != ')' || i > 0)
|
|
argc++;
|
|
break;
|
|
}
|
|
token_buffer += char(c);
|
|
if (c == '(')
|
|
level++;
|
|
else if (c == ')')
|
|
level--;
|
|
}
|
|
} while (c != ')' && c != EOF);
|
|
current_input = new argument_macro_input(body, argc, argv, current_input);
|
|
}
|
|
|
|
/* If lookup flag is non-zero the token will be looked up to see
|
|
if it is macro. If it's 1, it will looked up to see if it's a token.
|
|
*/
|
|
|
|
int get_token(int lookup_flag = 0)
|
|
{
|
|
for (;;) {
|
|
int c = get_char();
|
|
while (c == ' ' || c == '\n')
|
|
c = get_char();
|
|
switch (c) {
|
|
case EOF:
|
|
{
|
|
add_context("end of input");
|
|
}
|
|
return 0;
|
|
case '"':
|
|
{
|
|
int quoted = 0;
|
|
token_buffer.clear();
|
|
for (;;) {
|
|
c = get_char();
|
|
if (c == EOF) {
|
|
lex_error("missing \"");
|
|
break;
|
|
}
|
|
else if (c == '\n') {
|
|
lex_error("newline before end of quoted text");
|
|
break;
|
|
}
|
|
else if (c == '"') {
|
|
if (!quoted)
|
|
break;
|
|
token_buffer[token_buffer.length() - 1] = '"';
|
|
quoted = 0;
|
|
}
|
|
else {
|
|
token_buffer += c;
|
|
quoted = quoted ? 0 : c == '\\';
|
|
}
|
|
}
|
|
}
|
|
add_quoted_context(token_buffer);
|
|
return QUOTED_TEXT;
|
|
case '{':
|
|
case '}':
|
|
case '^':
|
|
case '~':
|
|
case '\t':
|
|
add_context(c);
|
|
return c;
|
|
default:
|
|
{
|
|
int break_flag = 0;
|
|
int quoted = 0;
|
|
token_buffer.clear();
|
|
if (c == '\\')
|
|
quoted = 1;
|
|
else
|
|
token_buffer += c;
|
|
int done = 0;
|
|
while (!done) {
|
|
c = peek_char();
|
|
if (!quoted && lookup_flag != 0 && c == '(') {
|
|
token_buffer += '\0';
|
|
definition *def = macro_table.lookup(token_buffer.contents());
|
|
if (def && def->is_macro && !def->is_simple) {
|
|
(void)get_char(); // skip initial '('
|
|
interpolate_macro_with_args(def->contents);
|
|
break_flag = 1;
|
|
break;
|
|
}
|
|
token_buffer.set_length(token_buffer.length() - 1);
|
|
}
|
|
if (quoted) {
|
|
quoted = 0;
|
|
switch (c) {
|
|
case EOF:
|
|
lex_error("`\\' ignored at end of equation");
|
|
done = 1;
|
|
break;
|
|
case '\n':
|
|
lex_error("`\\' ignored because followed by newline");
|
|
done = 1;
|
|
break;
|
|
case '\t':
|
|
lex_error("`\\' ignored because followed by tab");
|
|
done = 1;
|
|
break;
|
|
case '"':
|
|
(void)get_char();
|
|
token_buffer += '"';
|
|
break;
|
|
default:
|
|
(void)get_char();
|
|
token_buffer += '\\';
|
|
token_buffer += c;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
switch (c) {
|
|
case EOF:
|
|
case '{':
|
|
case '}':
|
|
case '^':
|
|
case '~':
|
|
case '"':
|
|
case ' ':
|
|
case '\t':
|
|
case '\n':
|
|
done = 1;
|
|
break;
|
|
case '\\':
|
|
(void)get_char();
|
|
quoted = 1;
|
|
break;
|
|
default:
|
|
(void)get_char();
|
|
token_buffer += char(c);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (break_flag || token_buffer.length() == 0)
|
|
break;
|
|
if (lookup_flag != 0) {
|
|
token_buffer += '\0';
|
|
definition *def = macro_table.lookup(token_buffer.contents());
|
|
token_buffer.set_length(token_buffer.length() - 1);
|
|
if (def) {
|
|
if (def->is_macro) {
|
|
current_input = new macro_input(def->contents, current_input);
|
|
break;
|
|
}
|
|
else if (lookup_flag == 1) {
|
|
add_context(token_buffer);
|
|
return def->tok;
|
|
}
|
|
}
|
|
}
|
|
add_context(token_buffer);
|
|
return TEXT;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void do_include()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad filename for include");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
const char *filename = token_buffer.contents();
|
|
errno = 0;
|
|
FILE *fp = fopen(filename, "r");
|
|
if (fp == 0) {
|
|
lex_error("can't open included file `%1'", filename);
|
|
return;
|
|
}
|
|
current_input = new file_input(fp, filename, current_input);
|
|
}
|
|
|
|
void ignore_definition()
|
|
{
|
|
int t = get_token();
|
|
if (t != TEXT) {
|
|
lex_error("bad definition");
|
|
return;
|
|
}
|
|
get_delimited_text();
|
|
}
|
|
|
|
void do_definition(int is_simple)
|
|
{
|
|
int t = get_token();
|
|
if (t != TEXT) {
|
|
lex_error("bad definition");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
const char *name = token_buffer.contents();
|
|
definition *def = macro_table.lookup(name);
|
|
if (def == 0) {
|
|
def = new definition;
|
|
macro_table.define(name, def);
|
|
}
|
|
else if (def->is_macro) {
|
|
a_delete def->contents;
|
|
}
|
|
get_delimited_text();
|
|
token_buffer += '\0';
|
|
def->is_macro = 1;
|
|
def->contents = strsave(token_buffer.contents());
|
|
def->is_simple = is_simple;
|
|
}
|
|
|
|
void do_undef()
|
|
{
|
|
int t = get_token();
|
|
if (t != TEXT) {
|
|
lex_error("bad undef command");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
macro_table.define(token_buffer.contents(), 0);
|
|
}
|
|
|
|
void do_gsize()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad argument to gsize command");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
if (!set_gsize(token_buffer.contents()))
|
|
lex_error("invalid size `%1'", token_buffer.contents());
|
|
}
|
|
|
|
void do_gfont()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad argument to gfont command");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
set_gfont(token_buffer.contents());
|
|
}
|
|
|
|
void do_grfont()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad argument to grfont command");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
set_grfont(token_buffer.contents());
|
|
}
|
|
|
|
void do_gbfont()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad argument to gbfont command");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
set_gbfont(token_buffer.contents());
|
|
}
|
|
|
|
void do_space()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad argument to space command");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
char *ptr;
|
|
long n = strtol(token_buffer.contents(), &ptr, 10);
|
|
if (n == 0 && ptr == token_buffer.contents())
|
|
lex_error("bad argument `%1' to space command", token_buffer.contents());
|
|
else
|
|
set_space(int(n));
|
|
}
|
|
|
|
void do_ifdef()
|
|
{
|
|
int t = get_token();
|
|
if (t != TEXT) {
|
|
lex_error("bad ifdef");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
definition *def = macro_table.lookup(token_buffer.contents());
|
|
int result = def && def->is_macro && !def->is_simple;
|
|
get_delimited_text();
|
|
if (result) {
|
|
token_buffer += '\0';
|
|
current_input = new macro_input(token_buffer.contents(), current_input);
|
|
}
|
|
}
|
|
|
|
void do_delim()
|
|
{
|
|
int c = get_char();
|
|
while (c == ' ' || c == '\n')
|
|
c = get_char();
|
|
int d;
|
|
if (c == EOF || (d = get_char()) == EOF)
|
|
lex_error("end of file while reading argument to `delim'");
|
|
else {
|
|
if (c == 'o' && d == 'f' && peek_char() == 'f') {
|
|
(void)get_char();
|
|
start_delim = end_delim = '\0';
|
|
}
|
|
else {
|
|
start_delim = c;
|
|
end_delim = d;
|
|
}
|
|
}
|
|
}
|
|
|
|
void do_chartype()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad chartype");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
string type = token_buffer;
|
|
t = get_token();
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad chartype");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
set_char_type(type.contents(), strsave(token_buffer.contents()));
|
|
}
|
|
|
|
void do_set()
|
|
{
|
|
int t = get_token(2);
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad set");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
string param = token_buffer;
|
|
t = get_token();
|
|
if (t != TEXT && t != QUOTED_TEXT) {
|
|
lex_error("bad set");
|
|
return;
|
|
}
|
|
token_buffer += '\0';
|
|
int n;
|
|
if (sscanf(&token_buffer[0], "%d", &n) != 1) {
|
|
lex_error("bad number `%1'", token_buffer.contents());
|
|
return;
|
|
}
|
|
set_param(param.contents(), n);
|
|
}
|
|
|
|
int yylex()
|
|
{
|
|
for (;;) {
|
|
int tk = get_token(1);
|
|
switch(tk) {
|
|
case UNDEF:
|
|
do_undef();
|
|
break;
|
|
case SDEFINE:
|
|
do_definition(1);
|
|
break;
|
|
case DEFINE:
|
|
do_definition(0);
|
|
break;
|
|
case TDEFINE:
|
|
if (!nroff)
|
|
do_definition(0);
|
|
else
|
|
ignore_definition();
|
|
break;
|
|
case NDEFINE:
|
|
if (nroff)
|
|
do_definition(0);
|
|
else
|
|
ignore_definition();
|
|
break;
|
|
case GSIZE:
|
|
do_gsize();
|
|
break;
|
|
case GFONT:
|
|
do_gfont();
|
|
break;
|
|
case GRFONT:
|
|
do_grfont();
|
|
break;
|
|
case GBFONT:
|
|
do_gbfont();
|
|
break;
|
|
case SPACE:
|
|
do_space();
|
|
break;
|
|
case INCLUDE:
|
|
do_include();
|
|
break;
|
|
case IFDEF:
|
|
do_ifdef();
|
|
break;
|
|
case DELIM:
|
|
do_delim();
|
|
break;
|
|
case CHARTYPE:
|
|
do_chartype();
|
|
break;
|
|
case SET:
|
|
do_set();
|
|
break;
|
|
case QUOTED_TEXT:
|
|
case TEXT:
|
|
token_buffer += '\0';
|
|
yylval.str = strsave(token_buffer.contents());
|
|
// fall through
|
|
default:
|
|
return tk;
|
|
}
|
|
}
|
|
}
|
|
|
|
void lex_error(const char *message,
|
|
const errarg &arg1,
|
|
const errarg &arg2,
|
|
const errarg &arg3)
|
|
{
|
|
char *filename;
|
|
int lineno;
|
|
if (!get_location(&filename, &lineno))
|
|
error(message, arg1, arg2, arg3);
|
|
else
|
|
error_with_file_and_line(filename, lineno, message, arg1, arg2, arg3);
|
|
}
|
|
|
|
void yyerror(const char *s)
|
|
{
|
|
char *filename;
|
|
int lineno;
|
|
if (!get_location(&filename, &lineno))
|
|
error(s);
|
|
else
|
|
error_with_file_and_line(filename, lineno, s);
|
|
show_context();
|
|
}
|
|
|