-/* Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
-
- Modified by Allen Wirfs-Brock, Instantiations Inc 2/90
- */
/* This is the Assembler Pre-Processor
- Copyright (C) 1987 Free Software Foundation, Inc.
+ Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 1996
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
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. */
+ the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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.app-file <filename>
- pair. This needs better error-handling.
- */
+ # <number> <filename> <garbage> into a .line <number>\n.file <filename>
+ pair. This needs better error-handling. */
#include <stdio.h>
#include "as.h" /* For BAD_CASE() only */
-#include "read.h"
-#if (__STDC__ != 1) && !defined(const)
-#define const /* Nothing */
+#if (__STDC__ != 1)
+#ifndef const
+#define const /* empty */
+#endif
#endif
static char lex[256];
#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. */
lex['\t'] = LEX_IS_WHITESPACE;
lex['\n'] = LEX_IS_NEWLINE;
lex[';'] = LEX_IS_LINE_SEPARATOR;
- lex['"'] = LEX_IS_STRINGQUOTE;
- lex['\''] = LEX_IS_ONECHAR_QUOTE;
lex[':'] = LEX_IS_COLON;
+ if (! flag_m68k_mri)
+ {
+ lex['"'] = LEX_IS_STRINGQUOTE;
+#ifndef TC_HPPA
+ lex['\''] = LEX_IS_ONECHAR_QUOTE;
+#endif
#ifdef SINGLE_QUOTE_STRINGS
- lex['\''] = LEX_IS_STRINGQUOTE;
+ lex['\''] = LEX_IS_STRINGQUOTE;
#endif
+ }
- /* Note that these override the previous defaults, e.g. if ';'
+ /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop
+ in state 5 of do_scrub_chars must be changed. */
- is a comment char, then it isn't a line separator. */
+ /* 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[*p] = LEX_IS_SYMBOL_COMPONENT;
+ lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
} /* declare symbol characters */
- for (p = line_comment_chars; *p; p++)
- {
- lex[*p] = LEX_IS_LINE_COMMENT_START;
- } /* declare line comment chars */
-
for (p = comment_chars; *p; p++)
{
- lex[*p] = LEX_IS_COMMENT_START;
+ 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[*p] = LEX_IS_LINE_SEPARATOR;
+ lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR;
} /* declare line separators */
/* Only allow slash-star comments if slash is not in use */
{
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. */
+ /* 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() */
+ if (flag_m68k_mri)
+ {
+ lex['\''] = LEX_IS_STRINGQUOTE;
+ lex[';'] = LEX_IS_COMMENT_START;
+ lex['*'] = LEX_IS_LINE_COMMENT_START;
+ /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but
+ then it can't be used in an expression. */
+ lex['!'] = LEX_IS_LINE_COMMENT_START;
+ }
+} /* do_scrub_begin() */
/* 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;
+static int add_newlines;
+static char *saved_input;
+static int saved_input_len;
/* 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
char *out_string;
char out_buf[sizeof (out_buf)];
int add_newlines;
- char *scrub_string;
- char *scrub_last_string;
- FILE *scrub_file;
+ char *saved_input;
+ int saved_input_len;
};
char *
saved->state = state;
saved->old_state = old_state;
saved->out_string = out_string;
- memcpy (out_buf, saved->out_buf, sizeof (out_buf));
+ 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;
+ saved->saved_input = saved_input;
+ saved->saved_input_len = saved_input_len;
/* do_scrub_begin() is not useful, just wastes time. */
+
+ state = 0;
+ saved_input = NULL;
+
return (char *) saved;
}
state = saved->state;
old_state = saved->old_state;
out_string = saved->out_string;
- memcpy (saved->out_buf, out_buf, sizeof (out_buf));
+ 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;
+ saved_input = saved->saved_input;
+ saved_input_len = saved->saved_input_len;
free (arg);
} /* app_pop() */
/* @@ This assumes that \n &c are the same on host and target. This is not
necessarily true. */
-int
+static int
process_escape (ch)
- char ch;
+ int ch;
{
switch (ch)
{
return ch;
}
}
-int
-do_scrub_next_char (get, unget)
- int (*get) ();
- void (*unget) ();
+
+/* This function is called to process input characters. The GET
+ parameter is used to retrieve more input characters. GET should
+ set its parameter to point to a buffer, and return the length of
+ the buffer; it should return 0 at end of file. The scrubbed output
+ characters are put into the buffer starting at TOSTART; the TOSTART
+ buffer is TOLEN bytes in length. The function returns the number
+ of scrubbed characters put into TOSTART. This will be TOLEN unless
+ end of file was seen. This function is arranged as a state
+ machine, and saves its state so that it may return at any point.
+ This is the way the old code used to work. */
+
+int
+do_scrub_chars (get, tostart, tolen)
+ int (*get) PARAMS ((char **));
+ char *tostart;
+ int tolen;
{
+ char *to = tostart;
+ char *toend = tostart + tolen;
+ char *from;
+ char *fromend;
+ int fromlen;
+ register int ch, ch2 = 0;
+ int not_cpp_line = 0;
+
/*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)
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 .app-file, put out string.
- 8: After putting out a .app-file string, flush until newline.
- -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
+ 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
*/
- register int ch, ch2 = 0;
+ /* 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. */
+
+ /* This macro gets the next input character. */
+
+#define GET() \
+ (from < fromend \
+ ? *from++ \
+ : ((saved_input != NULL \
+ ? (free (saved_input), \
+ saved_input = NULL, \
+ 0) \
+ : 0), \
+ fromlen = (*get) (&from), \
+ fromend = from + fromlen, \
+ (fromlen == 0 \
+ ? EOF \
+ : *from++)))
+
+ /* This macro pushes a character back on the input stream. */
+
+#define UNGET(uch) (*--from = (uch))
+
+ /* This macro puts a character into the output buffer. If this
+ character fills the output buffer, this macro jumps to the label
+ TOFULL. We use this rather ugly approach because we need to
+ handle two different termination conditions: EOF on the input
+ stream, and a full output buffer. It would be simpler if we
+ always read in the entire input stream before processing it, but
+ I don't want to make such a significant change to the assembler's
+ memory usage. */
+
+#define PUT(pch) \
+ do \
+ { \
+ *to++ = (pch); \
+ if (to >= toend) \
+ goto tofull; \
+ } \
+ while (0)
+
+ if (saved_input != NULL)
+ {
+ from = saved_input;
+ fromend = from + saved_input_len;
+ }
+ else
+ {
+ fromlen = (*get) (&from);
+ if (fromlen == 0)
+ return 0;
+ fromend = from + fromlen;
+ }
- switch (state)
+ while (1)
{
- case -1:
- ch = *out_string++;
- if (*out_string == 0)
+ /* The cases in this switch end with continue, in order to
+ branch back to the top of this while loop and generate the
+ next output character in the appropriate state. */
+ switch (state)
{
- state = old_state;
- old_state = 3;
- }
- return ch;
+ case -1:
+ ch = *out_string++;
+ if (*out_string == '\0')
+ {
+ state = old_state;
+ old_state = 3;
+ }
+ PUT (ch);
+ continue;
- case -2:
- for (;;)
- {
- do
+ case -2:
+ for (;;)
{
- ch = (*get) ();
+ do
+ {
+ ch = GET ();
+
+ if (ch == EOF)
+ {
+ as_warn ("end of file in comment");
+ goto fromeof;
+ }
+
+ if (ch == '\n')
+ PUT ('\n');
+ }
+ while (ch != '*');
+
+ while ((ch = GET ()) == '*')
+ ;
+
+ if (ch == EOF)
+ {
+ as_warn ("end of file in comment");
+ goto fromeof;
+ }
+
+ if (ch == '/')
+ break;
+
+ UNGET (ch);
}
- while (ch != EOF && ch != '\n' && ch != '*');
- if (ch == '\n' || ch == EOF)
- return ch;
- /* At this point, ch must be a '*' */
- while ((ch = (*get) ()) == '*')
+ state = old_state;
+ PUT (' ');
+ continue;
+
+ case 4:
+ ch = GET ();
+ if (ch == EOF)
+ goto fromeof;
+ else if (ch >= '0' && ch <= '9')
+ PUT (ch);
+ else
{
- ;
+ while (ch != EOF && IS_WHITESPACE (ch))
+ ch = GET ();
+ if (ch == '"')
+ {
+ UNGET (ch);
+ if (flag_m68k_mri)
+ out_string = "\n\tappfile ";
+ else
+ out_string = "\n\t.appfile ";
+ old_state = 7;
+ state = -1;
+ PUT (*out_string++);
+ }
+ else
+ {
+ while (ch != EOF && ch != '\n')
+ ch = GET ();
+ state = 0;
+ PUT (ch);
+ }
}
- 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 == '"')
+ continue;
+
+ case 5:
+ /* We are going to copy everything up to a quote character,
+ with special handling for a backslash. We try to
+ optimize the copying in the simple case without using the
+ GET and PUT macros. */
+ {
+ char *s;
+ int len;
+
+ for (s = from; s < fromend; s++)
+ {
+ ch = *s;
+ /* This condition must be changed if the type of any
+ other character can be LEX_IS_STRINGQUOTE. */
+ if (ch == '\\'
+ || ch == '"'
+ || ch == '\''
+ || ch == '\n')
+ break;
+ }
+ len = s - from;
+ if (len > toend - to)
+ len = toend - to;
+ if (len > 0)
+ {
+ memcpy (to, from, len);
+ to += len;
+ from += len;
+ }
+ }
+
+ ch = GET ();
+ if (ch == EOF)
{
- (*unget) (ch);
- out_string = "\n.app-file ";
- old_state = 7;
- state = -1;
- return *out_string++;
+ as_warn ("end of file in string: inserted '\"'");
+ state = old_state;
+ UNGET ('\n');
+ PUT ('"');
+ }
+ else if (lex[ch] == LEX_IS_STRINGQUOTE)
+ {
+ state = old_state;
+ PUT (ch);
+ }
+#ifndef NO_STRING_ESCAPES
+ else if (ch == '\\')
+ {
+ state = 6;
+ PUT (ch);
+ }
+#endif
+ else if (flag_m68k_mri && ch == '\n')
+ {
+ /* Just quietly terminate the string. This permits lines like
+ bne label loop if we haven't reach end yet
+ */
+ state = old_state;
+ UNGET (ch);
+ PUT ('\'');
}
else
{
- while (ch != EOF && ch != '\n')
- ch = (*get) ();
- return ch;
+ PUT (ch);
}
- }
+ continue;
- case 5:
- ch = (*get) ();
- if (lex[ch] == LEX_IS_STRINGQUOTE)
- {
- state = old_state;
- return ch;
- }
- else if (ch == '\\')
- {
- state = 6;
- return ch;
- }
- 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 '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- break;
+ 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++;
+ PUT ('\\');
+ continue;
+
+ case '"':
+ case '\\':
+ case 'b':
+ case 'f':
+ case 'n':
+ case 'r':
+ case 't':
+ case '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;
+ 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 EOF:
+ as_warn ("End of file in string: '\"' inserted");
+ PUT ('"');
+ continue;
+ }
+ PUT (ch);
+ continue;
- case 8:
- do
- ch = (*get) ();
- while (ch != '\n');
- state = 0;
- return ch;
- }
+ case 7:
+ ch = GET ();
+ state = 5;
+ old_state = 8;
+ if (ch == EOF)
+ goto fromeof;
+ PUT (ch);
+ continue;
- /* OK, we are somewhere in states 0 through 4 */
+ case 8:
+ do
+ ch = GET ();
+ while (ch != '\n' && ch != EOF);
+ if (ch == EOF)
+ goto fromeof;
+ state = 0;
+ PUT (ch);
+ continue;
+ }
- /* 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;
- }
+ /* OK, we are somewhere in states 0 through 4 or 9 through 11 */
- switch (lex[ch])
- {
- case LEX_IS_WHITESPACE:
- do
- ch = (*get) ();
- while (ch != EOF && IS_WHITESPACE (ch));
+ /* flushchar: */
+ ch = GET ();
+ recycle:
if (ch == EOF)
- return ch;
-
- if (IS_COMMENT (ch) || (state == 0 && IS_LINE_COMMENT (ch)) || ch == '/' || IS_LINE_SEPARATOR (ch))
{
- goto recycle;
+ if (state != 0)
+ {
+ as_warn ("end of file not at end of a line; newline inserted");
+ state = 0;
+ PUT ('\n');
+ }
+ goto fromeof;
}
-#ifdef MRI
- (*unget) (ch); /* Put back */
- return ' '; /* Always return one space at start of line */
-#endif
- /* If we're in state 2, we've seen a non-white
- character followed by whitespace. If the next
- character is ':', this is whitespace after a label
- name which we can ignore. */
- if (state == 2 && lex[ch] == LEX_IS_COLON)
+ switch (lex[ch])
{
- state = 0;
- return ch;
- }
+ case LEX_IS_WHITESPACE:
+ do
+ {
+ ch = GET ();
+ }
+ while (ch != EOF && IS_WHITESPACE (ch));
+ if (ch == EOF)
+ goto fromeof;
- switch (state)
- {
- case 0:
- state++;
- goto recycle; /* Punted leading sp */
- case 1:
- BAD_CASE (state); /* We can't get here */
- case 2:
- state++;
- (*unget) (ch);
- return ' '; /* Sp after opco */
- case 3:
- goto recycle; /* Sp in operands */
- default:
- BAD_CASE (state);
- }
- break;
+ if (state == 0)
+ {
+ /* Preserve a single whitespace character at the
+ beginning of a line. */
+ state = 1;
+ UNGET (ch);
+ PUT (' ');
+ break;
+ }
- case LEX_IS_TWOCHAR_COMMENT_1ST:
- ch2 = (*get) ();
- if (ch2 != EOF && lex[ch2] == LEX_IS_TWOCHAR_COMMENT_2ND)
- {
- for (;;)
+ if (IS_COMMENT (ch)
+ || ch == '/'
+ || IS_LINE_SEPARATOR (ch))
{
- do
+ /* cpp never outputs a leading space before the #, so
+ try to avoid being confused. */
+ not_cpp_line = 1;
+ if (flag_m68k_mri)
{
- ch2 = (*get) ();
- if (ch2 != EOF && IS_NEWLINE (ch2))
- add_newlines++;
+ /* In MRI mode, we keep these spaces. */
+ UNGET (ch);
+ PUT (' ');
+ break;
}
- while (ch2 != EOF &&
- (lex[ch2] != LEX_IS_TWOCHAR_COMMENT_2ND));
+ goto recycle;
+ }
- while (ch2 != EOF &&
- (lex[ch2] == LEX_IS_TWOCHAR_COMMENT_2ND))
+ /* 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
+ normally must ignore. In MRI mode, though, spaces are
+ not permitted between the label and the colon. */
+ if ((state == 2 || state == 11)
+ && lex[ch] == LEX_IS_COLON
+ && ! flag_m68k_mri)
+ {
+ state = 1;
+ PUT (ch);
+ break;
+ }
+
+ 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;
+ if (to + 1 < toend)
{
- ch2 = (*get) ();
+ /* Optimize common case by skipping UNGET/GET. */
+ PUT (' '); /* Sp after opco */
+ goto recycle;
}
+ UNGET (ch);
+ PUT (' ');
+ break;
+ case 3:
+ if (flag_m68k_mri)
+ {
+ /* In MRI mode, we keep these spaces. */
+ UNGET (ch);
+ PUT (' ');
+ break;
+ }
+ goto recycle; /* Sp in operands */
+ case 9:
+ case 10:
+ if (flag_m68k_mri)
+ {
+ /* In MRI mode, we keep these spaces. */
+ state = 3;
+ UNGET (ch);
+ PUT (' ');
+ break;
+ }
+ state = 10; /* Sp after symbol char */
+ goto recycle;
+ case 11:
+ state = 1;
+ UNGET (ch);
+ PUT (' '); /* Sp after label definition. */
+ break;
+ default:
+ BAD_CASE (state);
+ }
+ break;
- if (ch2 == EOF
- || lex[ch2] == LEX_IS_TWOCHAR_COMMENT_1ST)
- break;
- (*unget) (ch);
+ 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;
+ PUT (ch);
}
- if (ch2 == EOF)
- as_warn ("End of file in multiline comment");
+ break;
- ch = ' ';
- goto recycle;
- }
- else
- {
- if (ch2 != EOF)
- (*unget) (ch2);
- return ch;
- }
- break;
+ case LEX_IS_STRINGQUOTE:
+ if (state == 10)
+ {
+ /* Preserve the whitespace in foo "bar" */
+ UNGET (ch);
+ state = 3;
+ PUT (' ');
+
+ /* PUT didn't jump out. We could just break, but we
+ know what will happen, so optimize a bit. */
+ ch = GET ();
+ old_state = 3;
+ }
+ else if (state == 9)
+ old_state = 3;
+ else
+ old_state = state;
+ state = 5;
+ PUT (ch);
+ break;
- case LEX_IS_STRINGQUOTE:
- 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);
-
+ case LEX_IS_ONECHAR_QUOTE:
+ if (state == 10)
+ {
+ /* Preserve the whitespace in foo 'b' */
+ UNGET (ch);
+ state = 3;
+ PUT (' ');
+ break;
+ }
+ ch = GET ();
+ if (ch == EOF)
+ {
+ as_warn ("end of file after a one-character quote; \\0 inserted");
+ ch = 0;
+ }
+ if (ch == '\\')
+ {
+ ch = GET ();
+ if (ch == EOF)
+ {
+ as_warn ("end of file in escape character");
+ ch = '\\';
+ }
+ else
+ 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) ()) != '\'')
- {
+ /* None of these 'x constants for us. We want 'x'. */
+ if ((ch = GET ()) != '\'')
+ {
#ifdef REQUIRE_CHAR_CLOSE_QUOTE
- as_warn ("Missing close quote: (assumed)");
+ as_warn ("Missing close quote: (assumed)");
#else
- (*unget) (ch);
-#endif
- }
- if (strlen (out_buf) == 1)
- {
- return out_buf[0];
- }
- old_state = state;
- state = -1;
- out_string = out_buf;
- return *out_string++;
+ if (ch != EOF)
+ UNGET (ch);
#endif
+ }
+ if (strlen (out_buf) == 1)
+ {
+ PUT (out_buf[0]);
+ break;
+ }
+ if (state == 9)
+ old_state = 3;
+ else
+ old_state = state;
+ state = -1;
+ out_string = out_buf;
+ PUT (*out_string++);
+ break;
#endif
- case LEX_IS_COLON:
- if (state != 3)
- state = 0;
- 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_COLON:
+ if (state == 9 || state == 10)
+ state = 3;
+ else if (state != 3)
+ state = 1;
+ PUT (ch);
+ break;
- case LEX_IS_LINE_SEPARATOR:
- state = 0;
- 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_COMMENT_START:
- if (state != 0) /* Not at start of line, act normal */
- goto de_fault;
+ case LEX_IS_LINE_SEPARATOR:
+ state = 0;
+ PUT (ch);
+ break;
- /* 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. */
+ 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;
+ break;
+ }
+ else
+ {
+ UNGET (ch2);
+ }
+ } /* bad hack */
+
+ if (ch != '#')
+ not_cpp_line = 1;
- if (ch == '/' && (ch2 = (*get) ()) == '*')
- {
- state = -2;
- return (do_scrub_next_char (get, unget));
- }
- else
- {
- (*unget) (ch2);
- } /* bad hack */
+ do
+ {
+ ch = GET ();
+ }
+ while (ch != EOF && IS_WHITESPACE (ch));
+ if (ch == EOF)
+ {
+ as_warn ("end of file in comment; newline inserted");
+ PUT ('\n');
+ break;
+ }
+ 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;
+ PUT ('\n');
+ break;
+ }
+ /* Numerics begin comment. Perhaps CPP `# 123 "filename"' */
+ UNGET (ch);
+ old_state = 4;
+ state = -1;
+ if (flag_m68k_mri)
+ out_string = "\tappline ";
+ else
+ out_string = "\t.appline ";
+ PUT (*out_string++);
+ break;
+ }
- 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')
- {
- /* Non-numerics: Eat whole comment line */
- while (ch != EOF && !IS_NEWLINE (ch))
- ch = (*get) ();
+ /* 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
+ && (! flag_m68k_mri
+ || (ch != '!' && ch != '*')))
+ goto de_fault;
+ if (flag_m68k_mri
+ && (ch == '!' || ch == '*' || ch == '#')
+ && state != 1
+ && state != 10)
+ 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");
+ as_warn ("end of file in comment; newline inserted");
state = 0;
- return '\n';
- }
- /* Numerics begin comment. Perhaps CPP `# 123 "filename"' */
- (*unget) (ch);
- old_state = 4;
- state = -1;
- out_string = ".line ";
- return *out_string++;
-
- 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';
+ PUT ('\n');
+ break;
- default:
- de_fault:
- /* Some relatively `normal' character. */
- if (state == 0)
- {
- state = 2; /* Now seeing opcode */
- return ch;
- }
- else if (state == 1)
- {
- state = 2; /* Ditto */
- return ch;
- }
- else
- {
- return ch; /* Opcode or operands already */
- }
- }
- return -1;
-}
+ 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;
+ PUT (' ');
+ break;
+ }
-#ifdef TEST
+ if (state == 3)
+ state = 9;
-const char comment_chars[] = "|";
-const char line_comment_chars[] = "#";
+ /* This is a common case. Quickly copy CH and all the
+ following symbol component or normal characters. */
+ if (to + 1 < toend)
+ {
+ char *s;
+ int len;
-main ()
-{
- int ch;
+ for (s = from; s < fromend; s++)
+ {
+ int type;
- app_begin ();
- while ((ch = do_scrub_next_char (stdin)) != EOF)
- putc (ch, stdout);
-}
+ ch2 = *s;
+ type = lex[ch2];
+ if (type != 0
+ && type != LEX_IS_SYMBOL_COMPONENT)
+ break;
+ }
+ if (s > from)
+ {
+ /* Handle the last character normally, for
+ simplicity. */
+ --s;
+ }
+ len = s - from;
+ if (len > (toend - to) - 1)
+ len = (toend - to) - 1;
+ if (len > 0)
+ {
+ PUT (ch);
+ if (len > 8)
+ {
+ memcpy (to, from, len);
+ to += len;
+ from += len;
+ }
+ else
+ {
+ switch (len)
+ {
+ case 8: *to++ = *from++;
+ case 7: *to++ = *from++;
+ case 6: *to++ = *from++;
+ case 5: *to++ = *from++;
+ case 4: *to++ = *from++;
+ case 3: *to++ = *from++;
+ case 2: *to++ = *from++;
+ case 1: *to++ = *from++;
+ }
+ }
+ ch = GET ();
+ }
+ }
-as_warn (str)
- char *str;
-{
- fputs (str, stderr);
- putc ('\n', stderr);
-}
+ /* Fall through. */
+ default:
+ de_fault:
+ /* Some relatively `normal' character. */
+ if (state == 0)
+ {
+ state = 11; /* Now seeing label definition */
+ }
+ else if (state == 1)
+ {
+ state = 2; /* Ditto */
+ }
+ else if (state == 9)
+ {
+ if (lex[ch] != LEX_IS_SYMBOL_COMPONENT)
+ state = 3;
+ }
+ else if (state == 10)
+ {
+ state = 3;
+ }
+ PUT (ch);
+ break;
+ }
+ }
-#endif
+ /*NOTREACHED*/
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
+ fromeof:
+ /* We have reached the end of the input. */
+ return to - tostart;
+
+ tofull:
+ /* The output buffer is full. Save any input we have not yet
+ processed. */
+ if (fromend > from)
+ {
+ char *save;
+
+ save = (char *) xmalloc (fromend - from);
+ memcpy (save, from, fromend - from);
+ if (saved_input != NULL)
+ free (saved_input);
+ saved_input = save;
+ saved_input_len = fromend - from;
+ }
+ else
+ {
+ if (saved_input != NULL)
+ {
+ free (saved_input);
+ saved_input = NULL;
+ }
+ }
+ return to - tostart;
+}
/* end of app.c */
projects / deliverable / binutils-gdb.git / blobdiff