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-rw-r--r--bfd/doc/chew.c1579
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diff --git a/bfd/doc/chew.c b/bfd/doc/chew.c
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@@ -0,0 +1,1579 @@
+/* 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;
+}
generated by cgit v1.1 at 2024-12-03 01:15:27 +0000