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-rw-r--r--gnu/usr.bin/as/app.c746
1 files changed, 0 insertions, 746 deletions
diff --git a/gnu/usr.bin/as/app.c b/gnu/usr.bin/as/app.c
deleted file mode 100644
index 130fb1e..0000000
--- a/gnu/usr.bin/as/app.c
+++ /dev/null
@@ -1,746 +0,0 @@
-/* This is the Assembler Pre-Processor
- Copyright (C) 1987, 1990, 1991, 1992, 1994 Free Software Foundation, Inc.
-
- This file is part of GAS, the GNU Assembler.
-
- GAS 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.
-
- GAS 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 GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90 */
-/* App, the assembler pre-processor. This pre-processor strips out excess
- spaces, turns single-quoted characters into a decimal constant, and turns
- # <number> <filename> <garbage> into a .line <number>\n.file <filename>
- pair. This needs better error-handling. */
-
-#ifndef lint
-static char rcsid[] = "$FreeBSD$";
-#endif
-
-#include <stdio.h>
-#include "as.h" /* For BAD_CASE() only */
-
-#if (__STDC__ != 1)
-#ifndef const
-#define const /* empty */
-#endif
-#endif
-
-static char lex[256];
-static const char symbol_chars[] =
-"$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
-
-#define LEX_IS_SYMBOL_COMPONENT 1
-#define LEX_IS_WHITESPACE 2
-#define LEX_IS_LINE_SEPARATOR 3
-#define LEX_IS_COMMENT_START 4
-#define LEX_IS_LINE_COMMENT_START 5
-#define LEX_IS_TWOCHAR_COMMENT_1ST 6
-#define LEX_IS_TWOCHAR_COMMENT_2ND 7
-#define LEX_IS_STRINGQUOTE 8
-#define LEX_IS_COLON 9
-#define LEX_IS_NEWLINE 10
-#define LEX_IS_ONECHAR_QUOTE 11
-#define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT)
-#define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE)
-#define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR)
-#define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START)
-#define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START)
-#define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE)
-
-static int process_escape PARAMS ((int));
-
-/* FIXME-soon: The entire lexer/parser thingy should be
- built statically at compile time rather than dynamically
- each and every time the assembler is run. xoxorich. */
-
-void
-do_scrub_begin ()
-{
- const char *p;
-
- lex[' '] = LEX_IS_WHITESPACE;
- lex['\t'] = LEX_IS_WHITESPACE;
- lex['\n'] = LEX_IS_NEWLINE;
- lex[';'] = LEX_IS_LINE_SEPARATOR;
- lex['"'] = LEX_IS_STRINGQUOTE;
-#ifndef TC_HPPA
- lex['\''] = LEX_IS_ONECHAR_QUOTE;
-#endif
- lex[':'] = LEX_IS_COLON;
-
-
-
-#ifdef SINGLE_QUOTE_STRINGS
- lex['\''] = LEX_IS_STRINGQUOTE;
-#endif
-
- /* Note that these override the previous defaults, e.g. if ';' is a
- comment char, then it isn't a line separator. */
- for (p = symbol_chars; *p; ++p)
- {
- lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
- } /* declare symbol characters */
-
- for (p = comment_chars; *p; p++)
- {
- lex[(unsigned char) *p] = LEX_IS_COMMENT_START;
- } /* declare comment chars */
-
- for (p = line_comment_chars; *p; p++)
- {
- lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START;
- } /* declare line comment chars */
-
- for (p = line_separator_chars; *p; p++)
- {
- lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR;
- } /* declare line separators */
-
- /* Only allow slash-star comments if slash is not in use */
- if (lex['/'] == 0)
- {
- lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST;
- }
- /* FIXME-soon. This is a bad hack but otherwise, we can't do
- c-style comments when '/' is a line comment char. xoxorich. */
- if (lex['*'] == 0)
- {
- lex['*'] = LEX_IS_TWOCHAR_COMMENT_2ND;
- }
-} /* do_scrub_begin() */
-
-FILE *scrub_file;
-
-int
-scrub_from_file ()
-{
- return getc (scrub_file);
-}
-
-void
-scrub_to_file (ch)
- int ch;
-{
- ungetc (ch, scrub_file);
-} /* scrub_to_file() */
-
-char *scrub_string;
-char *scrub_last_string;
-
-int
-scrub_from_string ()
-{
- return scrub_string == scrub_last_string ? EOF : *scrub_string++;
-} /* scrub_from_string() */
-
-void
-scrub_to_string (ch)
- int ch;
-{
- *--scrub_string = ch;
-} /* scrub_to_string() */
-
-/* Saved state of the scrubber */
-static int state;
-static int old_state;
-static char *out_string;
-static char out_buf[20];
-static int add_newlines = 0;
-
-/* Data structure for saving the state of app across #include's. Note that
- app is called asynchronously to the parsing of the .include's, so our
- state at the time .include is interpreted is completely unrelated.
- That's why we have to save it all. */
-
-struct app_save
- {
- int state;
- int old_state;
- char *out_string;
- char out_buf[sizeof (out_buf)];
- int add_newlines;
- char *scrub_string;
- char *scrub_last_string;
- FILE *scrub_file;
- };
-
-char *
-app_push ()
-{
- register struct app_save *saved;
-
- saved = (struct app_save *) xmalloc (sizeof (*saved));
- saved->state = state;
- saved->old_state = old_state;
- saved->out_string = out_string;
- memcpy (saved->out_buf, out_buf, sizeof (out_buf));
- saved->add_newlines = add_newlines;
- saved->scrub_string = scrub_string;
- saved->scrub_last_string = scrub_last_string;
- saved->scrub_file = scrub_file;
-
- /* do_scrub_begin() is not useful, just wastes time. */
- return (char *) saved;
-}
-
-void
-app_pop (arg)
- char *arg;
-{
- register struct app_save *saved = (struct app_save *) arg;
-
- /* There is no do_scrub_end (). */
- state = saved->state;
- old_state = saved->old_state;
- out_string = saved->out_string;
- memcpy (out_buf, saved->out_buf, sizeof (out_buf));
- add_newlines = saved->add_newlines;
- scrub_string = saved->scrub_string;
- scrub_last_string = saved->scrub_last_string;
- scrub_file = saved->scrub_file;
-
- free (arg);
-} /* app_pop() */
-
-/* @@ This assumes that \n &c are the same on host and target. This is not
- necessarily true. */
-static int
-process_escape (ch)
- int ch;
-{
- switch (ch)
- {
- case 'b':
- return '\b';
- case 'f':
- return '\f';
- case 'n':
- return '\n';
- case 'r':
- return '\r';
- case 't':
- return '\t';
- case '\'':
- return '\'';
- case '"':
- return '\"';
- default:
- return ch;
- }
-}
-int
-do_scrub_next_char (get, unget)
- int (*get) ();
- void (*unget) ();
-{
- /*State 0: beginning of normal line
- 1: After first whitespace on line (flush more white)
- 2: After first non-white (opcode) on line (keep 1white)
- 3: after second white on line (into operands) (flush white)
- 4: after putting out a .line, put out digits
- 5: parsing a string, then go to old-state
- 6: putting out \ escape in a "d string.
- 7: After putting out a .appfile, put out string.
- 8: After putting out a .appfile string, flush until newline.
- 9: After seeing symbol char in state 3 (keep 1white after symchar)
- 10: After seeing whitespace in state 9 (keep white before symchar)
- 11: After seeing a symbol character in state 0 (eg a label definition)
- -1: output string in out_string and go to the state in old_state
- -2: flush text until a '*' '/' is seen, then go to state old_state
- */
-
- /* I added states 9 and 10 because the MIPS ECOFF assembler uses
- constructs like ``.loc 1 20''. This was turning into ``.loc
- 120''. States 9 and 10 ensure that a space is never dropped in
- between characters which could appear in a identifier. Ian
- Taylor, ian@cygnus.com.
-
- I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works
- correctly on the PA (and any other target where colons are optional).
- Jeff Law, law@cs.utah.edu. */
-
- register int ch, ch2 = 0;
- int not_cpp_line = 0;
-
- switch (state)
- {
- case -1:
- ch = *out_string++;
- if (*out_string == 0)
- {
- state = old_state;
- old_state = 3;
- }
- return ch;
-
- case -2:
- for (;;)
- {
- do
- {
- ch = (*get) ();
- }
- while (ch != EOF && ch != '\n' && ch != '*');
- if (ch == '\n' || ch == EOF)
- return ch;
-
- /* At this point, ch must be a '*' */
- while ((ch = (*get) ()) == '*')
- {
- ;
- }
- if (ch == EOF || ch == '/')
- break;
- (*unget) (ch);
- }
- state = old_state;
- return ' ';
-
- case 4:
- ch = (*get) ();
- if (ch == EOF || (ch >= '0' && ch <= '9'))
- return ch;
- else
- {
- while (ch != EOF && IS_WHITESPACE (ch))
- ch = (*get) ();
- if (ch == '"')
- {
- (*unget) (ch);
- out_string = "\n\t.appfile ";
- old_state = 7;
- state = -1;
- return *out_string++;
- }
- else
- {
- while (ch != EOF && ch != '\n')
- ch = (*get) ();
- state = 0;
- return ch;
- }
- }
-
- case 5:
- ch = (*get) ();
- if (lex[ch] == LEX_IS_STRINGQUOTE)
- {
- state = old_state;
- return ch;
- }
-#ifndef NO_STRING_ESCAPES
- else if (ch == '\\')
- {
- state = 6;
- return ch;
- }
-#endif
- else if (ch == EOF)
- {
- as_warn ("End of file in string: inserted '\"'");
- state = old_state;
- (*unget) ('\n');
- return '"';
- }
- else
- {
- return ch;
- }
-
- case 6:
- state = 5;
- ch = (*get) ();
- switch (ch)
- {
- /* Handle strings broken across lines, by turning '\n' into
- '\\' and 'n'. */
- case '\n':
- (*unget) ('n');
- add_newlines++;
- return '\\';
-
- case '"':
- case '\\':
- case 'b':
- case 'f':
- case 'n':
- case 'r':
- case 't':
-#ifdef BACKSLASH_V
- case 'v':
-#endif /* BACKSLASH_V */
- case 'x':
- case 'X':
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- break;
-#if defined(IGNORE_NONSTANDARD_ESCAPES) | defined(ONLY_STANDARD_ESCAPES)
- default:
- as_warn ("Unknown escape '\\%c' in string: Ignored", ch);
- break;
-#else /* ONLY_STANDARD_ESCAPES */
- default:
- /* Accept \x as x for any x */
- break;
-#endif /* ONLY_STANDARD_ESCAPES */
-
- case EOF:
- as_warn ("End of file in string: '\"' inserted");
- return '"';
- }
- return ch;
-
- case 7:
- ch = (*get) ();
- state = 5;
- old_state = 8;
- return ch;
-
- case 8:
- do
- ch = (*get) ();
- while (ch != '\n');
- state = 0;
- return ch;
- }
-
- /* OK, we are somewhere in states 0 through 4 or 9 through 11 */
-
- /* flushchar: */
- ch = (*get) ();
-recycle:
- if (ch == EOF)
- {
- if (state != 0)
- as_warn ("End of file not at end of a line: Newline inserted.");
- return ch;
- }
-
- switch (lex[ch])
- {
- case LEX_IS_WHITESPACE:
- do
- /* Preserve a single whitespace character at the beginning of
- a line. */
- if (state == 0)
- {
- state = 1;
- return ch;
- }
- else
- ch = (*get) ();
- while (ch != EOF && IS_WHITESPACE (ch));
- if (ch == EOF)
- return ch;
-
- if (IS_COMMENT (ch)
- || (state == 0 && IS_LINE_COMMENT (ch))
- || ch == '/'
- || IS_LINE_SEPARATOR (ch))
- {
- /* cpp never outputs a leading space before the #, so try to
- avoid being confused. */
- not_cpp_line = 1;
- goto recycle;
- }
-#ifdef MRI
- (*unget) (ch); /* Put back */
- return ' '; /* Always return one space at start of line */
-#endif
-
- /* If we're in state 2 or 11, we've seen a non-white character
- followed by whitespace. If the next character is ':', this
- is whitespace after a label name which we *must* ignore. */
- if ((state == 2 || state == 11) && lex[ch] == LEX_IS_COLON)
- {
- state = 1;
- return ch;
- }
-
- switch (state)
- {
- case 0:
- state++;
- goto recycle; /* Punted leading sp */
- case 1:
- /* We can arrive here if we leave a leading whitespace character
- at the beginning of a line. */
- goto recycle;
- case 2:
- state = 3;
- (*unget) (ch);
- return ' '; /* Sp after opco */
- case 3:
- goto recycle; /* Sp in operands */
- case 9:
- case 10:
- state = 10; /* Sp after symbol char */
- goto recycle;
- case 11:
- state = 1;
- (*unget) (ch);
- return ' '; /* Sp after label definition. */
- default:
- BAD_CASE (state);
- }
- break;
-
- case LEX_IS_TWOCHAR_COMMENT_1ST:
- ch2 = (*get) ();
- if (ch2 != EOF && lex[ch2] == LEX_IS_TWOCHAR_COMMENT_2ND)
- {
- for (;;)
- {
- do
- {
- ch2 = (*get) ();
- if (ch2 != EOF && IS_NEWLINE (ch2))
- add_newlines++;
- }
- while (ch2 != EOF &&
- (lex[ch2] != LEX_IS_TWOCHAR_COMMENT_2ND));
-
- while (ch2 != EOF &&
- (lex[ch2] == LEX_IS_TWOCHAR_COMMENT_2ND))
- {
- ch2 = (*get) ();
- }
-
- if (ch2 == EOF
- || lex[ch2] == LEX_IS_TWOCHAR_COMMENT_1ST)
- break;
- (*unget) (ch);
- }
- if (ch2 == EOF)
- as_warn ("End of file in multiline comment");
-
- ch = ' ';
- goto recycle;
- }
- else
- {
- if (ch2 != EOF)
- (*unget) (ch2);
- if (state == 9 || state == 10)
- state = 3;
- return ch;
- }
- break;
-
- case LEX_IS_STRINGQUOTE:
- if (state == 9 || state == 10)
- old_state = 3;
- else
- old_state = state;
- state = 5;
- return ch;
-#ifndef MRI
-#ifndef IEEE_STYLE
- case LEX_IS_ONECHAR_QUOTE:
- ch = (*get) ();
- if (ch == EOF)
- {
- as_warn ("End-of-file after a one-character quote; \\000 inserted");
- ch = 0;
- }
- if (ch == '\\')
- {
- ch = (*get) ();
- ch = process_escape (ch);
- }
- sprintf (out_buf, "%d", (int) (unsigned char) ch);
-
-
- /* None of these 'x constants for us. We want 'x'. */
- if ((ch = (*get) ()) != '\'')
- {
-#ifdef REQUIRE_CHAR_CLOSE_QUOTE
- as_warn ("Missing close quote: (assumed)");
-#else
- (*unget) (ch);
-#endif
- }
- if (strlen (out_buf) == 1)
- {
- return out_buf[0];
- }
- if (state == 9 || state == 10)
- old_state = 3;
- else
- old_state = state;
- state = -1;
- out_string = out_buf;
- return *out_string++;
-#endif
-#endif
- case LEX_IS_COLON:
- if (state == 9 || state == 10)
- state = 3;
- else if (state != 3)
- state = 1;
- return ch;
-
- case LEX_IS_NEWLINE:
- /* Roll out a bunch of newlines from inside comments, etc. */
- if (add_newlines)
- {
- --add_newlines;
- (*unget) (ch);
- }
- /* fall thru into... */
-
- case LEX_IS_LINE_SEPARATOR:
- state = 0;
- return ch;
-
- case LEX_IS_LINE_COMMENT_START:
- if (state == 0) /* Only comment at start of line. */
- {
- /* FIXME-someday: The two character comment stuff was badly
- thought out. On i386, we want '/' as line comment start
- AND we want C style comments. hence this hack. The
- whole lexical process should be reworked. xoxorich. */
- if (ch == '/')
- {
- ch2 = (*get) ();
- if (ch2 == '*')
- {
- state = -2;
- return (do_scrub_next_char (get, unget));
- }
- else
- {
- (*unget) (ch2);
- }
- } /* bad hack */
-
- if (ch != '#')
- not_cpp_line = 1;
-
- do
- ch = (*get) ();
- while (ch != EOF && IS_WHITESPACE (ch));
- if (ch == EOF)
- {
- as_warn ("EOF in comment: Newline inserted");
- return '\n';
- }
- if (ch < '0' || ch > '9' || not_cpp_line)
- {
- /* Non-numerics: Eat whole comment line */
- while (ch != EOF && !IS_NEWLINE (ch))
- ch = (*get) ();
- if (ch == EOF)
- as_warn ("EOF in Comment: Newline inserted");
- state = 0;
- return '\n';
- }
- /* Numerics begin comment. Perhaps CPP `# 123 "filename"' */
- (*unget) (ch);
- old_state = 4;
- state = -1;
- out_string = "\t.appline ";
- return *out_string++;
- }
-
- /* We have a line comment character which is not at the start of
- a line. If this is also a normal comment character, fall
- through. Otherwise treat it as a default character. */
- if (strchr (comment_chars, ch) == NULL)
- goto de_fault;
- /* Fall through. */
- case LEX_IS_COMMENT_START:
- do
- ch = (*get) ();
- while (ch != EOF && !IS_NEWLINE (ch));
- if (ch == EOF)
- as_warn ("EOF in comment: Newline inserted");
- state = 0;
- return '\n';
-
- case LEX_IS_SYMBOL_COMPONENT:
- if (state == 10)
- {
- /* This is a symbol character following another symbol
- character, with whitespace in between. We skipped the
- whitespace earlier, so output it now. */
- (*unget) (ch);
- state = 3;
- return ' ';
- }
- if (state == 3)
- state = 9;
- /* Fall through. */
- default:
- de_fault:
- /* Some relatively `normal' character. */
- if (state == 0)
- {
- state = 11; /* Now seeing label definition */
- return ch;
- }
- else if (state == 1)
- {
- state = 2; /* Ditto */
- return ch;
- }
- else if (state == 9)
- {
- if (lex[ch] != LEX_IS_SYMBOL_COMPONENT)
- state = 3;
- return ch;
- }
- else if (state == 10)
- {
- state = 3;
- return ch;
- }
- else
- {
- return ch; /* Opcode or operands already */
- }
- }
- return -1;
-}
-
-#ifdef TEST
-
-const char comment_chars[] = "|";
-const char line_comment_chars[] = "#";
-
-main ()
-{
- int ch;
-
- app_begin ();
- while ((ch = do_scrub_next_char (stdin)) != EOF)
- putc (ch, stdout);
-}
-
-as_warn (str)
- char *str;
-{
- fputs (str, stderr);
- putc ('\n', stderr);
-}
-
-#endif
-
-/* end of app.c */
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