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binutils-gdb/bfd/doc/chew.c

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/* chew
Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1998
Free Software Foundation, Inc.
Contributed by steve chamberlain @cygnus
This file is part of BFD, the Binary File Descriptor library.
This program 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 of the License, or
(at your option) any later version.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Yet another way of extracting documentation from source.
No, I haven't finished it yet, but I hope you people like it better
than the old way
sac
Basically, this is a sort of string forth, maybe we should call it
struth?
You define new words thus:
: <newword> <oldwords> ;
*/
/* Primitives provided by the program:
Two stacks are provided, a string stack and an integer stack.
Internal state variables:
internal_wanted - indicates whether `-i' was passed
internal_mode - user-settable
Commands:
push_text
! - pop top of integer stack for address, pop next for value; store
@ - treat value on integer stack as the address of an integer; push
that integer on the integer stack after popping the "address"
hello - print "hello\n" to stdout
stdout - put stdout marker on TOS
stderr - put stderr marker on TOS
print - print TOS-1 on TOS (eg: "hello\n" stdout print)
skip_past_newline
catstr - fn icatstr
copy_past_newline - append input, up to and including newline into TOS
dup - fn other_dup
drop - discard TOS
idrop - ditto
remchar - delete last character from TOS
get_stuff_in_command
do_fancy_stuff - translate <<foo>> to @code{foo} in TOS
bulletize - if "o" lines found, prepend @itemize @bullet to TOS
and @item to each "o" line; append @end itemize
courierize - put @example around . and | lines, translate {* *} { }
exit - fn chew_exit
swap
outputdots - strip out lines without leading dots
paramstuff - convert full declaration into "PARAMS" form if not already
maybecatstr - do catstr if internal_mode == internal_wanted, discard
value in any case
translatecomments - turn {* and *} into comment delimiters
kill_bogus_lines - get rid of extra newlines
indent
internalmode - pop from integer stack, set `internalmode' to that value
print_stack_level - print current stack depth to stderr
strip_trailing_newlines - go ahead, guess...
[quoted string] - push string onto string stack
[word starting with digit] - push atol(str) onto integer stack
A command must be all upper-case, and alone on a line.
Foo. */
#include <ansidecl.h>
#include "sysdep.h"
#include <assert.h>
#include <stdio.h>
#include <ctype.h>
#define DEF_SIZE 5000
#define STACK 50
int internal_wanted;
int internal_mode;
int warning;
/* Here is a string type ... */
typedef struct buffer
{
char *ptr;
unsigned long write_idx;
unsigned long size;
} string_type;
#ifdef __STDC__
static void init_string_with_size (string_type *, unsigned int);
static void init_string (string_type *);
static int find (string_type *, char *);
static void write_buffer (string_type *, FILE *);
static void delete_string (string_type *);
static char *addr (string_type *, unsigned int);
static char at (string_type *, unsigned int);
static void catchar (string_type *, int);
static void overwrite_string (string_type *, string_type *);
static void catbuf (string_type *, char *, unsigned int);
static void cattext (string_type *, char *);
static void catstr (string_type *, string_type *);
#endif
static void DEFUN(init_string_with_size,(buffer, size),
string_type *buffer AND
unsigned int size )
{
buffer->write_idx = 0;
buffer->size = size;
buffer->ptr = malloc(size);
}
static void DEFUN(init_string,(buffer),
string_type *buffer)
{
init_string_with_size(buffer, DEF_SIZE);
}
static int DEFUN(find, (str, what),
string_type *str AND
char *what)
{
unsigned int i;
char *p;
p = what;
for (i = 0; i < str->write_idx && *p; i++)
{
if (*p == str->ptr[i])
p++;
else
p = what;
}
return (*p == 0);
}
static void DEFUN(write_buffer,(buffer, f),
string_type *buffer AND
FILE *f)
{
fwrite(buffer->ptr, buffer->write_idx, 1, f);
}
static void DEFUN(delete_string,(buffer),
string_type *buffer)
{
free(buffer->ptr);
}
static char *DEFUN(addr, (buffer, idx),
string_type *buffer AND
unsigned int idx)
{
return buffer->ptr + idx;
}
static char DEFUN(at,(buffer, pos),
string_type *buffer AND
unsigned int pos)
{
if (pos >= buffer->write_idx)
return 0;
return buffer->ptr[pos];
}
static void DEFUN(catchar,(buffer, ch),
string_type *buffer AND
int ch)
{
if (buffer->write_idx == buffer->size)
{
buffer->size *=2;
buffer->ptr = realloc(buffer->ptr, buffer->size);
}
buffer->ptr[buffer->write_idx ++ ] = ch;
}
static void DEFUN(overwrite_string,(dst, src),
string_type *dst AND
string_type *src)
{
free(dst->ptr);
dst->size = src->size;
dst->write_idx = src->write_idx;
dst->ptr = src->ptr;
}
static void DEFUN(catbuf,(buffer, buf, len),
string_type *buffer AND
char *buf AND
unsigned int len)
{
if (buffer->write_idx + len >= buffer->size)
{
while (buffer->write_idx + len >= buffer->size)
buffer->size *= 2;
buffer->ptr = realloc (buffer->ptr, buffer->size);
}
memcpy (buffer->ptr + buffer->write_idx, buf, len);
buffer->write_idx += len;
}
static void DEFUN(cattext,(buffer, string),
string_type *buffer AND
char *string)
{
catbuf (buffer, string, (unsigned int) strlen (string));
}
static void DEFUN(catstr,(dst, src),
string_type *dst AND
string_type *src)
{
catbuf (dst, src->ptr, src->write_idx);
}
static unsigned int
DEFUN(skip_white_and_stars,(src, idx),
string_type *src AND
unsigned int idx)
{
char c;
while ((c = at(src,idx)),
isspace ((unsigned char) c)
|| (c == '*'
/* Don't skip past end-of-comment or star as first
character on its line. */
&& at(src,idx +1) != '/'
&& at(src,idx -1) != '\n'))
idx++;
return idx;
}
/***********************************************************************/
string_type stack[STACK];
string_type *tos;
unsigned int idx = 0; /* Pos in input buffer */
string_type *ptr; /* and the buffer */
typedef void (*stinst_type)();
stinst_type *pc;
stinst_type sstack[STACK];
stinst_type *ssp = &sstack[0];
long istack[STACK];
long *isp = &istack[0];
typedef int *word_type;
struct dict_struct
{
char *word;
struct dict_struct *next;
stinst_type *code;
int code_length;
int code_end;
int var;
};
typedef struct dict_struct dict_type;
#define WORD(x) static void x()
static void
die (msg)
char *msg;
{
fprintf (stderr, "%s\n", msg);
exit (1);
}
static void
check_range ()
{
if (tos < stack)
die ("underflow in string stack");
if (tos >= stack + STACK)
die ("overflow in string stack");
}
static void
icheck_range ()
{
if (isp < istack)
die ("underflow in integer stack");
if (isp >= istack + STACK)
die ("overflow in integer stack");
}
#ifdef __STDC__
static void exec (dict_type *);
static void call (void);
static void remchar (void), strip_trailing_newlines (void), push_number (void);
static void push_text (void);
static void remove_noncomments (string_type *, string_type *);
static void print_stack_level (void);
static void paramstuff (void), translatecomments (void);
static void outputdots (void), courierize (void), bulletize (void);
static void do_fancy_stuff (void);
static int iscommand (string_type *, unsigned int);
static int copy_past_newline (string_type *, unsigned int, string_type *);
static void icopy_past_newline (void), kill_bogus_lines (void), indent (void);
static void get_stuff_in_command (void), swap (void), other_dup (void);
static void drop (void), idrop (void);
static void icatstr (void), skip_past_newline (void), internalmode (void);
static void maybecatstr (void);
static char *nextword (char *, char **);
dict_type *lookup_word (char *);
static void perform (void);
dict_type *newentry (char *);
unsigned int add_to_definition (dict_type *, stinst_type);
void add_intrinsic (char *, void (*)());
void add_var (char *);
void compile (char *);
static void bang (void);
static void atsign (void);
static void hello (void);
static void stdout_ (void);
static void stderr_ (void);
static void print (void);
static void read_in (string_type *, FILE *);
static void usage (void);
static void chew_exit (void);
#endif
static void DEFUN(exec,(word),
dict_type *word)
{
pc = word->code;
while (*pc)
(*pc)();
}
WORD(call)
{
stinst_type *oldpc = pc;
dict_type *e;
e = (dict_type *)(pc [1]);
exec(e);
pc = oldpc + 2;
}
WORD(remchar)
{
if (tos->write_idx)
tos->write_idx--;
pc++;
}
static void
strip_trailing_newlines ()
{
while ((isspace ((unsigned char) at (tos, tos->write_idx - 1))
|| at (tos, tos->write_idx - 1) == '\n')
&& tos->write_idx > 0)
tos->write_idx--;
pc++;
}
WORD(push_number)
{
isp++;
icheck_range ();
pc++;
*isp = (long)(*pc);
pc++;
}
WORD(push_text)
{
tos++;
check_range ();
init_string(tos);
pc++;
cattext(tos,*((char **)pc));
pc++;
}
/* This function removes everything not inside comments starting on
the first char of the line from the string, also when copying
comments, removes blank space and leading *'s.
Blank lines are turned into one blank line. */
static void
DEFUN(remove_noncomments,(src,dst),
string_type *src AND
string_type *dst)
{
unsigned int idx = 0;
while (at(src,idx))
{
/* Now see if we have a comment at the start of the line */
if (at(src,idx) == '\n'
&& at(src,idx+1) == '/'
&& at(src,idx+2) == '*')
{
idx+=3;
idx = skip_white_and_stars(src,idx);
/* Remove leading dot */
if (at(src, idx) == '.')
idx++;
/* Copy to the end of the line, or till the end of the
comment */
while (at(src, idx))
{
if (at(src, idx) == '\n')
{
/* end of line, echo and scrape of leading blanks */
if (at(src,idx +1) == '\n')
catchar(dst,'\n');
catchar(dst,'\n');
idx++;
idx = skip_white_and_stars(src, idx);
}
else if (at(src, idx) == '*' && at(src,idx+1) == '/')
{
idx +=2 ;
cattext(dst,"\nENDDD\n");
break;
}
else
{
catchar(dst, at(src, idx));
idx++;
}
}
}
else idx++;
}
}
static void
print_stack_level ()
{
fprintf (stderr, "current string stack depth = %d, ", tos - stack);
fprintf (stderr, "current integer stack depth = %d\n", isp - istack);
pc++;
}
/* turn:
foobar name(stuff);
into:
foobar
name PARAMS ((stuff));
and a blank line.
*/
static void
DEFUN_VOID(paramstuff)
{
unsigned int openp;
unsigned int fname;
unsigned int idx;
string_type out;
init_string(&out);
/* make sure that it's not already param'd or proto'd */
if(find(tos,"PARAMS") || find(tos,"PROTO") || !find(tos,"(")) {
catstr(&out,tos);
}
else
{
/* Find the open paren */
for (openp = 0; at(tos, openp) != '(' && at(tos,openp); openp++)
;
fname = openp;
/* Step back to the fname */
fname--;
while (fname && isspace((unsigned char) at(tos, fname)))
fname --;
while (fname
&& !isspace((unsigned char) at(tos,fname))
&& at(tos,fname) != '*')
fname--;
fname++;
for (idx = 0; idx < fname; idx++) /* Output type */
{
catchar(&out, at(tos,idx));
}
cattext(&out, "\n"); /* Insert a newline between type and fnname */
for (idx = fname; idx < openp; idx++) /* Output fnname */
{
catchar(&out, at(tos,idx));
}
cattext(&out," PARAMS (");
while (at(tos,idx) && at(tos,idx) !=';')
{
catchar(&out, at(tos, idx));
idx++;
}
cattext(&out,");\n\n");
}
overwrite_string(tos, &out);
pc++;
}
/* turn {*
and *} into comments */
WORD(translatecomments)
{
unsigned int idx = 0;
string_type out;
init_string(&out);
while (at(tos, idx))
{
if (at(tos,idx) == '{' && at(tos,idx+1) =='*')
{
cattext(&out,"/*");
idx+=2;
}
else if (at(tos,idx) == '*' && at(tos,idx+1) =='}')
{
cattext(&out,"*/");
idx+=2;
}
else
{
catchar(&out, at(tos, idx));
idx++;
}
}
overwrite_string(tos, &out);
pc++;
}
#if 0
/* This is not currently used. */
/* turn everything not starting with a . into a comment */
WORD(manglecomments)
{
unsigned int idx = 0;
string_type out;
init_string(&out);
while (at(tos, idx))
{
if (at(tos,idx) == '\n' && at(tos,idx+1) =='*')
{
cattext(&out," /*");
idx+=2;
}
else if (at(tos,idx) == '*' && at(tos,idx+1) =='}')
{
cattext(&out,"*/");
idx+=2;
}
else
{
catchar(&out, at(tos, idx));
idx++;
}
}
overwrite_string(tos, &out);
pc++;
}
#endif
/* Mod tos so that only lines with leading dots remain */
static void
DEFUN_VOID(outputdots)
{
unsigned int idx = 0;
string_type out;
init_string(&out);
while (at(tos, idx))
{
if (at(tos, idx) == '\n' && at(tos, idx+1) == '.')
{
char c;
idx += 2;
while ((c = at(tos, idx)) && c != '\n')
{
if (c == '{' && at(tos,idx+1) =='*')
{
cattext(&out," /*");
idx+=2;
}
else if (c == '*' && at(tos,idx+1) =='}')
{
cattext(&out,"*/");
idx+=2;
}
else
{
catchar(&out, c);
idx++;
}
}
catchar(&out,'\n');
}
else
{
idx++;
}
}
overwrite_string(tos, &out);
pc++;
}
/* Find lines starting with . and | and put example around them on tos */
WORD(courierize)
{
string_type out;
unsigned int idx = 0;
int command = 0;
init_string(&out);
while (at(tos, idx))
{
if (at(tos, idx) == '\n'
&& (at(tos, idx +1 ) == '.'
|| at(tos,idx+1) == '|'))
{
cattext(&out,"\n@example\n");
do
{
idx += 2;
while (at(tos, idx) && at(tos, idx)!='\n')
{
if (at(tos,idx)=='{' && at(tos,idx+1) =='*')
{
cattext(&out," /*");
idx+=2;
}
else if (at(tos,idx)=='*' && at(tos,idx+1) =='}')
{
cattext(&out,"*/");
idx+=2;
}
else if (at(tos,idx) == '{' && !command)
{
cattext(&out,"@{");
idx++;
}
else if (at(tos,idx) == '}' && !command)
{
cattext(&out,"@}");
idx++;
}
else
{
if (at(tos,idx) == '@')
command = 1;
else if (isspace((unsigned char) at(tos,idx))
|| at(tos,idx) == '}')
command = 0;
catchar(&out, at(tos, idx));
idx++;
}
}
catchar(&out,'\n');
}
while (at(tos, idx) == '\n'
&& ((at(tos, idx+1) == '.')
|| (at(tos,idx+1) == '|')))
;
cattext(&out,"@end example");
}
else
{
catchar(&out, at(tos, idx));
idx++;
}
}
overwrite_string(tos, &out);
pc++;
}
/* Finds any lines starting with "o ", if there are any, then turns
on @itemize @bullet, and @items each of them. Then ends with @end
itemize, inplace at TOS*/
WORD(bulletize)
{
unsigned int idx = 0;
int on = 0;
string_type out;
init_string(&out);
while (at(tos, idx)) {
if (at(tos, idx) == '@' &&
at(tos, idx+1) == '*')
{
cattext(&out,"*");
idx+=2;
}
else
if (at(tos, idx) == '\n' &&
at(tos, idx+1) == 'o' &&
isspace((unsigned char) at(tos, idx +2)))
{
if (!on)
{
cattext(&out,"\n@itemize @bullet\n");
on = 1;
}
cattext(&out,"\n@item\n");
idx+=3;
}
else
{
catchar(&out, at(tos, idx));
if (on && at(tos, idx) == '\n' &&
at(tos, idx+1) == '\n' &&
at(tos, idx+2) != 'o')
{
cattext(&out, "@end itemize");
on = 0;
}
idx++;
}
}
if (on)
{
cattext(&out,"@end itemize\n");
}
delete_string(tos);
*tos = out;
pc++;
}
/* Turn <<foo>> into @code{foo} in place at TOS*/
WORD(do_fancy_stuff)
{
unsigned int idx = 0;
string_type out;
init_string(&out);
while (at(tos, idx))
{
if (at(tos, idx) == '<'
&& at(tos, idx+1) == '<'
&& !isspace((unsigned char) at(tos,idx + 2)))
{
/* This qualifies as a << startup */
idx +=2;
cattext(&out,"@code{");
while(at(tos,idx) &&
at(tos,idx) != '>' )
{
catchar(&out, at(tos, idx));
idx++;
}
cattext(&out,"}");
idx+=2;
}
else
{
catchar(&out, at(tos, idx));
idx++;
}
}
delete_string(tos);
*tos = out;
pc++;
}
/* A command is all upper case,and alone on a line */
static int
DEFUN( iscommand,(ptr, idx),
string_type *ptr AND
unsigned int idx)
{
unsigned int len = 0;
while (at(ptr,idx)) {
if (isupper((unsigned char) at(ptr,idx)) || at(ptr,idx) == ' ' ||
at(ptr,idx) == '_')
{
len++;
idx++;
}
else if(at(ptr,idx) == '\n')
{
if (len > 3) return 1;
return 0;
}
else return 0;
}
return 0;
}
static int
DEFUN(copy_past_newline,(ptr, idx, dst),
string_type *ptr AND
unsigned int idx AND
string_type *dst)
{
int column = 0;
while (at(ptr, idx) && at(ptr, idx) != '\n')
{
if (at (ptr, idx) == '\t')
{
/* Expand tabs. Neither makeinfo nor TeX can cope well with
them. */
do
catchar (dst, ' ');
while (++column & 7);
}
else
{
catchar(dst, at(ptr, idx));
column++;
}
idx++;
}
catchar(dst, at(ptr, idx));
idx++;
return idx;
}
WORD(icopy_past_newline)
{
tos++;
check_range ();
init_string(tos);
idx = copy_past_newline(ptr, idx, tos);
pc++;
}
/* indent
Take the string at the top of the stack, do some prettying */
WORD(kill_bogus_lines)
{
int sl ;
int idx = 0;
int c;
int dot = 0 ;
string_type out;
init_string(&out);
/* Drop leading nl */
while (at(tos,idx) == '\n')
{
idx++;
}
c = idx;
/* If the first char is a '.' prepend a newline so that it is
recognized properly later. */
if (at (tos, idx) == '.')
catchar (&out, '\n');
/* Find the last char */
while (at(tos,idx))
{
idx++;
}
/* find the last non white before the nl */
idx--;
while (idx && isspace((unsigned char) at(tos,idx)))
idx--;
idx++;
/* Copy buffer upto last char, but blank lines before and after
dots don't count */
sl = 1;
while (c < idx)
{
if (at(tos,c) == '\n'
&& at(tos,c+1) == '\n'
&& at(tos,c+2) == '.')
{
/* Ignore two newlines before a dot*/
c++;
}
else if (at(tos,c) == '.' && sl)
{
/* remember that this line started with a dot */
dot=2;
}
else if (at(tos,c) == '\n'
&& at(tos,c+1) == '\n'
&& dot)
{
c++;
/* Ignore two newlines when last line was dot */
}
catchar(&out, at(tos,c));
if (at(tos,c) == '\n')
{
sl = 1;
if (dot == 2)dot=1;else dot = 0;
}
else
sl = 0;
c++;
}
/* Append nl*/
catchar(&out, '\n');
pc++;
delete_string(tos);
*tos = out;
}
WORD(indent)
{
string_type out;
int tab = 0;
int idx = 0;
int ol =0;
init_string(&out);
while (at(tos,idx)) {
switch (at(tos,idx))
{
case '\n':
cattext(&out,"\n");
idx++;
if (tab && at(tos,idx))
{
cattext(&out," ");
}
ol = 0;
break;
case '(':
tab++;
if (ol == 0)
cattext(&out," ");
idx++;
cattext(&out,"(");
ol = 1;
break;
case ')':
tab--;
cattext(&out,")");
idx++;
ol=1;
break;
default:
catchar(&out,at(tos,idx));
ol=1;
idx++;
break;
}
}
pc++;
delete_string(tos);
*tos = out;
}
WORD(get_stuff_in_command)
{
tos++;
check_range ();
init_string(tos);
while (at(ptr, idx)) {
if (iscommand(ptr, idx)) break;
idx = copy_past_newline(ptr, idx, tos);
}
pc++;
}
WORD(swap)
{
string_type t;
t = tos[0];
tos[0] = tos[-1];
tos[-1] =t;
pc++;
}
WORD(other_dup)
{
tos++;
check_range ();
init_string(tos);
catstr(tos, tos-1);
pc++;
}
WORD(drop)
{
tos--;
check_range ();
pc++;
}
WORD(idrop)
{
isp--;
icheck_range ();
pc++;
}
WORD(icatstr)
{
tos--;
check_range ();
catstr(tos, tos+1);
delete_string(tos+1);
pc++;
}
WORD(skip_past_newline)
{
while (at(ptr,idx)
&& at(ptr,idx) != '\n')
idx++;
idx++;
pc++;
}
WORD(internalmode)
{
internal_mode = *(isp);
isp--;
icheck_range ();
pc++;
}
WORD(maybecatstr)
{
if (internal_wanted == internal_mode)
{
catstr(tos-1, tos);
}
delete_string(tos);
tos--;
check_range ();
pc++;
}
char *
DEFUN(nextword,(string, word),
char *string AND
char **word)
{
char *word_start;
int idx;
char *dst;
char *src;
int length = 0;
while (isspace((unsigned char) *string) || *string == '-') {
if (*string == '-')
{
while (*string && *string != '\n')
string++;
}
else {
string++;
}
}
if (!*string) return 0;
word_start = string;
if (*string == '"')
{
do
{
string++;
length++;
if (*string == '\\')
{
string += 2;
length += 2;
}
}
while (*string != '"');
}
else
{
while (!isspace((unsigned char) *string))
{
string++;
length++;
}
}
*word = malloc(length + 1);
dst = *word;
src = word_start;
for (idx= 0; idx < length; idx++)
{
if (src[idx] == '\\')
switch (src[idx+1])
{
case 'n':
*dst++ = '\n';
idx++;
break;
case '"':
case '\\':
*dst++ = src[idx+1];
idx++;
break;
default:
*dst++ = '\\';
break;
}
else
*dst++ = src[idx];
}
*dst++ = 0;
if(*string)
return string + 1;
else
return 0;
}
dict_type *root;
dict_type *
DEFUN(lookup_word,(word),
char *word)
{
dict_type *ptr = root;
while (ptr) {
if (strcmp(ptr->word, word) == 0) return ptr;
ptr = ptr->next;
}
if (warning)
fprintf(stderr,"Can't find %s\n",word);
return 0;
}
static void DEFUN_VOID(perform)
{
tos = stack;
while (at(ptr, idx)) {
/* It's worth looking through the command list */
if (iscommand(ptr, idx))
{
char *next;
dict_type *word ;
(void) nextword(addr(ptr, idx), &next);
word = lookup_word(next);
if (word)
{
exec(word);
}
else
{
if (warning)
fprintf(stderr,"warning, %s is not recognised\n", next);
skip_past_newline();
}
}
else skip_past_newline();
}
}
dict_type *
DEFUN(newentry,(word),
char *word)
{
dict_type *new = (dict_type *)malloc(sizeof(dict_type));
new->word = word;
new->next = root;
root = new;
new->code = (stinst_type *)malloc(sizeof(stinst_type ));
new->code_length = 1;
new->code_end = 0;
return new;
}
unsigned int
DEFUN(add_to_definition,(entry, word),
dict_type *entry AND
stinst_type word)
{
if (entry->code_end == entry->code_length)
{
entry->code_length += 2;
entry->code =
(stinst_type *) realloc((char *)(entry->code),
entry->code_length *sizeof(word_type));
}
entry->code[entry->code_end] = word;
return entry->code_end++;
}
void
DEFUN(add_intrinsic,(name, func),
char *name AND
void (*func)())
{
dict_type *new = newentry(name);
add_to_definition(new, func);
add_to_definition(new, 0);
}
void
DEFUN(add_var,(name),
char *name)
{
dict_type *new = newentry(name);
add_to_definition(new, push_number);
add_to_definition(new, (stinst_type)(&(new->var)));
add_to_definition(new,0);
}
void
DEFUN(compile, (string),
char *string)
{
/* add words to the dictionary */
char *word;
string = nextword(string, &word);
while (string && *string && word[0])
{
if (strcmp(word,"var")==0)
{
string=nextword(string, &word);
add_var(word);
string=nextword(string, &word);
}
else
if (word[0] == ':')
{
dict_type *ptr;
/* Compile a word and add to dictionary */
string = nextword(string, &word);
ptr = newentry(word);
string = nextword(string, &word);
while (word[0] != ';' )
{
switch (word[0])
{
case '"':
/* got a string, embed magic push string
function */
add_to_definition(ptr, push_text);
add_to_definition(ptr, (stinst_type)(word+1));
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
/* Got a number, embedd the magic push number
function */
add_to_definition(ptr, push_number);
add_to_definition(ptr, (stinst_type)atol(word));
break;
default:
add_to_definition(ptr, call);
add_to_definition(ptr, (stinst_type)lookup_word(word));
}
string = nextword(string, &word);
}
add_to_definition(ptr,0);
string = nextword(string, &word);
}
else
{
fprintf(stderr,"syntax error at %s\n",string-1);
}
}
}
static void DEFUN_VOID(bang)
{
*(long *)((isp[0])) = isp[-1];
isp-=2;
icheck_range ();
pc++;
}
WORD(atsign)
{
isp[0] = *(long *)(isp[0]);
pc++;
}
WORD(hello)
{
printf("hello\n");
pc++;
}
WORD(stdout_)
{
isp++;
icheck_range ();
*isp = 1;
pc++;
}
WORD(stderr_)
{
isp++;
icheck_range ();
*isp = 2;
pc++;
}
WORD(print)
{
if (*isp == 1)
write_buffer (tos, stdout);
else if (*isp == 2)
write_buffer (tos, stderr);
else
fprintf (stderr, "print: illegal print destination `%ld'\n", *isp);
isp--;
tos--;
icheck_range ();
check_range ();
pc++;
}
static void DEFUN(read_in, (str, file),
string_type *str AND
FILE *file)
{
char buff[10000];
unsigned int r;
do
{
r = fread(buff, 1, sizeof(buff), file);
catbuf(str, buff, r);
}
while (r);
buff[0] = 0;
catbuf(str, buff,1);
}
static void DEFUN_VOID(usage)
{
fprintf(stderr,"usage: -[d|i|g] <file >file\n");
exit(33);
}
/* There is no reliable way to declare exit. Sometimes it returns
int, and sometimes it returns void. Sometimes it changes between
OS releases. Trying to get it declared correctly in the hosts file
is a pointless waste of time. */
static void
chew_exit ()
{
exit (0);
}
int DEFUN(main,(ac,av),
int ac AND
char *av[])
{
unsigned int i;
string_type buffer;
string_type pptr;
init_string(&buffer);
init_string(&pptr);
init_string(stack+0);
tos=stack+1;
ptr = &pptr;
add_intrinsic("push_text", push_text);
add_intrinsic("!", bang);
add_intrinsic("@", atsign);
add_intrinsic("hello",hello);
add_intrinsic("stdout",stdout_);
add_intrinsic("stderr",stderr_);
add_intrinsic("print",print);
add_intrinsic("skip_past_newline", skip_past_newline );
add_intrinsic("catstr", icatstr );
add_intrinsic("copy_past_newline", icopy_past_newline );
add_intrinsic("dup", other_dup );
add_intrinsic("drop", drop);
add_intrinsic("idrop", idrop);
add_intrinsic("remchar", remchar );
add_intrinsic("get_stuff_in_command", get_stuff_in_command );
add_intrinsic("do_fancy_stuff", do_fancy_stuff );
add_intrinsic("bulletize", bulletize );
add_intrinsic("courierize", courierize );
/* If the following line gives an error, exit() is not declared in the
../hosts/foo.h file for this host. Fix it there, not here! */
/* No, don't fix it anywhere; see comment on chew_exit--Ian Taylor. */
add_intrinsic("exit", chew_exit );
add_intrinsic("swap", swap );
add_intrinsic("outputdots", outputdots );
add_intrinsic("paramstuff", paramstuff );
add_intrinsic("maybecatstr", maybecatstr );
add_intrinsic("translatecomments", translatecomments );
add_intrinsic("kill_bogus_lines", kill_bogus_lines);
add_intrinsic("indent", indent);
add_intrinsic("internalmode", internalmode);
add_intrinsic("print_stack_level", print_stack_level);
add_intrinsic("strip_trailing_newlines", strip_trailing_newlines);
/* Put a nl at the start */
catchar(&buffer,'\n');
read_in(&buffer, stdin);
remove_noncomments(&buffer, ptr);
for (i= 1; i < (unsigned int) ac; i++)
{
if (av[i][0] == '-')
{
if (av[i][1] == 'f')
{
string_type b;
FILE *f;
init_string(&b);
f = fopen(av[i+1],"r");
if (!f)
{
fprintf(stderr,"Can't open the input file %s\n",av[i+1]);
return 33;
}
read_in(&b, f);
compile(b.ptr);
perform();
}
else if (av[i][1] == 'i')
{
internal_wanted = 1;
}
else if (av[i][1] == 'w')
{
warning = 1;
}
else
usage ();
}
}
write_buffer(stack+0, stdout);
if (tos != stack)
{
fprintf (stderr, "finishing with current stack level %d\n", tos - stack);
return 1;
}
return 0;
}
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