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authorRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
committerRichard Henderson <rth@redhat.com>1999-05-03 07:29:11 +0000
commit252b5132c753830d5fd56823373aed85f2a0db63 (patch)
tree1af963bfd8d3e55167b81def4207f175eaff3a56 /gas/app.c
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19990502 sourceware importbinu_ss_19990502
Diffstat (limited to 'gas/app.c')
-rw-r--r--gas/app.c1255
1 files changed, 1255 insertions, 0 deletions
diff --git a/gas/app.c b/gas/app.c
new file mode 100644
index 0000000..2a8df3a
--- /dev/null
+++ b/gas/app.c
@@ -0,0 +1,1255 @@
+/* This is the Assembler Pre-Processor
+ Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999
+ 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, 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.file <filename>
+ pair. This needs better error-handling. */
+
+#include <stdio.h>
+#include "as.h" /* For BAD_CASE() only */
+
+#if (__STDC__ != 1)
+#ifndef const
+#define const /* empty */
+#endif
+#endif
+
+/* Whether we are scrubbing in m68k MRI mode. This is different from
+ flag_m68k_mri, because the two flags will be affected by the .mri
+ pseudo-op at different times. */
+static int scrub_m68k_mri;
+
+/* The pseudo-op which switches in and out of MRI mode. See the
+ comment in do_scrub_chars. */
+static const char mri_pseudo[] = ".mri 0";
+
+#if defined TC_ARM && defined OBJ_ELF
+/* The pseudo-op for which we need to special-case `@' characters.
+ See the comment in do_scrub_chars. */
+static const char symver_pseudo[] = ".symver";
+static const char * symver_state;
+#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_STRINGQUOTE 8
+#define LEX_IS_COLON 9
+#define LEX_IS_NEWLINE 10
+#define LEX_IS_ONECHAR_QUOTE 11
+#ifdef TC_V850
+#define LEX_IS_DOUBLEDASH_1ST 12
+#endif
+#ifdef TC_M32R
+#define LEX_IS_DOUBLEBAR_1ST 13
+#endif
+#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 (m68k_mri)
+ int m68k_mri;
+{
+ const char *p;
+ int c;
+
+ scrub_m68k_mri = m68k_mri;
+
+ lex[' '] = LEX_IS_WHITESPACE;
+ lex['\t'] = LEX_IS_WHITESPACE;
+ lex['\r'] = LEX_IS_WHITESPACE;
+ lex['\n'] = LEX_IS_NEWLINE;
+ lex[';'] = LEX_IS_LINE_SEPARATOR;
+ lex[':'] = LEX_IS_COLON;
+
+ if (! m68k_mri)
+ {
+ lex['"'] = LEX_IS_STRINGQUOTE;
+
+#ifndef TC_HPPA
+ lex['\''] = LEX_IS_ONECHAR_QUOTE;
+#endif
+
+#ifdef SINGLE_QUOTE_STRINGS
+ lex['\''] = LEX_IS_STRINGQUOTE;
+#endif
+ }
+
+ /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop
+ in state 5 of do_scrub_chars must be changed. */
+
+ /* 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 (c = 128; c < 256; ++c)
+ lex[c] = LEX_IS_SYMBOL_COMPONENT;
+
+#ifdef tc_symbol_chars
+ /* This macro permits the processor to specify all characters which
+ may appears in an operand. This will prevent the scrubber from
+ discarding meaningful whitespace in certain cases. The i386
+ backend uses this to support prefixes, which can confuse the
+ scrubber as to whether it is parsing operands or opcodes. */
+ for (p = tc_symbol_chars; *p; ++p)
+ lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT;
+#endif
+
+ /* The m68k backend wants to be able to change comment_chars. */
+#ifndef tc_comment_chars
+#define tc_comment_chars comment_chars
+#endif
+ for (p = tc_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.
+ FIXME: This isn't right. We should always permit them. */
+ if (lex['/'] == 0)
+ {
+ lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST;
+ }
+
+ if (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;
+ }
+
+#ifdef TC_V850
+ lex['-'] = LEX_IS_DOUBLEDASH_1ST;
+#endif
+#ifdef TC_M32R
+ lex['|'] = LEX_IS_DOUBLEBAR_1ST;
+#endif
+#ifdef TC_D30V
+ /* must do this is we want VLIW instruction with "->" or "<-" */
+ lex['-'] = LEX_IS_SYMBOL_COMPONENT;
+#endif
+} /* 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;
+static char *saved_input;
+static int saved_input_len;
+static const char *mri_state;
+static char mri_last_ch;
+
+/* 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 * saved_input;
+ int saved_input_len;
+ int scrub_m68k_mri;
+ const char * mri_state;
+ char mri_last_ch;
+#if defined TC_ARM && defined OBJ_ELF
+ const char * symver_state;
+#endif
+ };
+
+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->saved_input = saved_input;
+ saved->saved_input_len = saved_input_len;
+ saved->scrub_m68k_mri = scrub_m68k_mri;
+ saved->mri_state = mri_state;
+ saved->mri_last_ch = mri_last_ch;
+#if defined TC_ARM && defined OBJ_ELF
+ saved->symver_state = symver_state;
+#endif
+
+ /* do_scrub_begin() is not useful, just wastes time. */
+
+ state = 0;
+ saved_input = NULL;
+
+ 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;
+ saved_input = saved->saved_input;
+ saved_input_len = saved->saved_input_len;
+ scrub_m68k_mri = saved->scrub_m68k_mri;
+ mri_state = saved->mri_state;
+ mri_last_ch = saved->mri_last_ch;
+#if defined TC_ARM && defined OBJ_ELF
+ symver_state = saved->symver_state;
+#endif
+
+ 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;
+ }
+}
+
+/* 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;
+
+ /*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
+#ifdef TC_V850
+ 12: After seeing a dash, looking for a second dash as a start of comment.
+#endif
+#ifdef TC_M32R
+ 13: After seeing a vertical bar, looking for a second vertical bar as a parallel expression seperator.
+#endif
+ */
+
+ /* 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.
+
+ I added state 13 so that something like "cmp r1, r2 || trap #1" does not
+ get squashed into "cmp r1,r2||trap#1", with the all important space
+ between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */
+
+ /* This macro gets the next input character. */
+
+#define GET() \
+ (from < fromend \
+ ? * (unsigned char *) (from++) \
+ : ((saved_input != NULL \
+ ? (free (saved_input), \
+ saved_input = NULL, \
+ 0) \
+ : 0), \
+ fromlen = (*get) (&from), \
+ fromend = from + fromlen, \
+ (fromlen == 0 \
+ ? EOF \
+ : * (unsigned char *) (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;
+ }
+
+ while (1)
+ {
+ /* 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)
+ {
+ case -1:
+ ch = *out_string++;
+ if (*out_string == '\0')
+ {
+ state = old_state;
+ old_state = 3;
+ }
+ PUT (ch);
+ continue;
+
+ case -2:
+ for (;;)
+ {
+ 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);
+ }
+
+ state = old_state;
+ UNGET (' ');
+ 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 (scrub_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);
+ }
+ }
+ 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)
+ {
+ 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 (scrub_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
+ {
+ PUT (ch);
+ }
+ continue;
+
+ 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;
+#endif /* ONLY_STANDARD_ESCAPES */
+
+ case EOF:
+ as_warn (_("End of file in string: '\"' inserted"));
+ PUT ('"');
+ continue;
+ }
+ PUT (ch);
+ continue;
+
+ case 7:
+ ch = GET ();
+ state = 5;
+ old_state = 8;
+ if (ch == EOF)
+ goto fromeof;
+ PUT (ch);
+ continue;
+
+ case 8:
+ do
+ ch = GET ();
+ while (ch != '\n' && ch != EOF);
+ if (ch == EOF)
+ goto fromeof;
+ state = 0;
+ PUT (ch);
+ continue;
+ }
+
+ /* OK, we are somewhere in states 0 through 4 or 9 through 11 */
+
+ /* flushchar: */
+ ch = GET ();
+
+ recycle:
+
+#if defined TC_ARM && defined OBJ_ELF
+ /* We need to watch out for .symver directives. See the comment later
+ in this function. */
+ if (symver_state == NULL)
+ {
+ if ((state == 0 || state == 1) && ch == symver_pseudo[0])
+ symver_state = symver_pseudo + 1;
+ }
+ else
+ {
+ /* We advance to the next state if we find the right
+ character. */
+ if (ch != '\0' && (*symver_state == ch))
+ ++symver_state;
+ else if (*symver_state != '\0')
+ /* We did not get the expected character, or we didn't
+ get a valid terminating character after seeing the
+ entire pseudo-op, so we must go back to the beginning. */
+ symver_state = NULL;
+ else
+ {
+ /* We've read the entire pseudo-op. If this is the end
+ of the line, go back to the beginning. */
+ if (IS_NEWLINE (ch))
+ symver_state = NULL;
+ }
+ }
+#endif /* TC_ARM && OBJ_ELF */
+
+#ifdef TC_M68K
+ /* We want to have pseudo-ops which control whether we are in
+ MRI mode or not. Unfortunately, since m68k MRI mode affects
+ the scrubber, that means that we need a special purpose
+ recognizer here. */
+ if (mri_state == NULL)
+ {
+ if ((state == 0 || state == 1)
+ && ch == mri_pseudo[0])
+ mri_state = mri_pseudo + 1;
+ }
+ else
+ {
+ /* We advance to the next state if we find the right
+ character, or if we need a space character and we get any
+ whitespace character, or if we need a '0' and we get a
+ '1' (this is so that we only need one state to handle
+ ``.mri 0'' and ``.mri 1''). */
+ if (ch != '\0'
+ && (*mri_state == ch
+ || (*mri_state == ' '
+ && lex[ch] == LEX_IS_WHITESPACE)
+ || (*mri_state == '0'
+ && ch == '1')))
+ {
+ mri_last_ch = ch;
+ ++mri_state;
+ }
+ else if (*mri_state != '\0'
+ || (lex[ch] != LEX_IS_WHITESPACE
+ && lex[ch] != LEX_IS_NEWLINE))
+ {
+ /* We did not get the expected character, or we didn't
+ get a valid terminating character after seeing the
+ entire pseudo-op, so we must go back to the
+ beginning. */
+ mri_state = NULL;
+ }
+ else
+ {
+ /* We've read the entire pseudo-op. mips_last_ch is
+ either '0' or '1' indicating whether to enter or
+ leave MRI mode. */
+ do_scrub_begin (mri_last_ch == '1');
+ mri_state = NULL;
+
+ /* We continue handling the character as usual. The
+ main gas reader must also handle the .mri pseudo-op
+ to control expression parsing and the like. */
+ }
+ }
+#endif
+
+ if (ch == EOF)
+ {
+ if (state != 0)
+ {
+ as_warn (_("end of file not at end of a line; newline inserted"));
+ state = 0;
+ PUT ('\n');
+ }
+ goto fromeof;
+ }
+
+ switch (lex[ch])
+ {
+ case LEX_IS_WHITESPACE:
+ do
+ {
+ ch = GET ();
+ }
+ while (ch != EOF && IS_WHITESPACE (ch));
+ if (ch == EOF)
+ goto fromeof;
+
+ if (state == 0)
+ {
+ /* Preserve a single whitespace character at the
+ beginning of a line. */
+ state = 1;
+ UNGET (ch);
+ PUT (' ');
+ break;
+ }
+
+ if (IS_COMMENT (ch)
+ || ch == '/'
+ || IS_LINE_SEPARATOR (ch))
+ {
+ if (scrub_m68k_mri)
+ {
+ /* In MRI mode, we keep these spaces. */
+ UNGET (ch);
+ PUT (' ');
+ break;
+ }
+ goto recycle;
+ }
+
+ /* 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
+ && ! scrub_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)
+ {
+ /* Optimize common case by skipping UNGET/GET. */
+ PUT (' '); /* Sp after opco */
+ goto recycle;
+ }
+ UNGET (ch);
+ PUT (' ');
+ break;
+ case 3:
+ if (scrub_m68k_mri)
+ {
+ /* In MRI mode, we keep these spaces. */
+ UNGET (ch);
+ PUT (' ');
+ break;
+ }
+ goto recycle; /* Sp in operands */
+ case 9:
+ case 10:
+ if (scrub_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:
+ if (flag_m68k_mri
+#ifdef LABELS_WITHOUT_COLONS
+ || 1
+#endif
+ )
+ state = 1;
+ else
+ {
+ /* We know that ch is not ':', since we tested that
+ case above. Therefore this is not a label, so it
+ must be the opcode, and we've just seen the
+ whitespace after it. */
+ state = 3;
+ }
+ UNGET (ch);
+ PUT (' '); /* Sp after label definition. */
+ break;
+ default:
+ BAD_CASE (state);
+ }
+ break;
+
+ case LEX_IS_TWOCHAR_COMMENT_1ST:
+ ch2 = GET ();
+ if (ch2 == '*')
+ {
+ for (;;)
+ {
+ do
+ {
+ ch2 = GET ();
+ if (ch2 != EOF && IS_NEWLINE (ch2))
+ add_newlines++;
+ }
+ while (ch2 != EOF && ch2 != '*');
+
+ while (ch2 == '*')
+ ch2 = GET ();
+
+ if (ch2 == EOF || ch2 == '/')
+ break;
+
+ /* This UNGET will ensure that we count newlines
+ correctly. */
+ UNGET (ch2);
+ }
+
+ 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);
+ }
+ 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;
+
+#ifndef IEEE_STYLE
+ 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 ()) != '\'')
+ {
+#ifdef REQUIRE_CHAR_CLOSE_QUOTE
+ as_warn (_("Missing close quote: (assumed)"));
+#else
+ 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 == 9 || state == 10)
+ state = 3;
+ else if (state != 3)
+ state = 1;
+ PUT (ch);
+ break;
+
+ 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;
+ PUT (ch);
+ break;
+
+#ifdef TC_V850
+ case LEX_IS_DOUBLEDASH_1ST:
+ ch2 = GET();
+ if (ch2 != '-')
+ {
+ UNGET (ch2);
+ goto de_fault;
+ }
+ /* read and skip to end of line */
+ do
+ {
+ ch = GET ();
+ }
+ while (ch != EOF && ch != '\n');
+ if (ch == EOF)
+ {
+ as_warn (_("end of file in comment; newline inserted"));
+ }
+ state = 0;
+ PUT ('\n');
+ break;
+#endif
+#ifdef TC_M32R
+ case LEX_IS_DOUBLEBAR_1ST:
+ ch2 = GET();
+ if (ch2 != '|')
+ {
+ UNGET (ch2);
+ goto de_fault;
+ }
+ /* Reset back to state 1 and pretend that we are parsing a line from
+ just after the first white space. */
+ state = 1;
+ PUT ('|');
+ PUT ('|');
+ break;
+#endif
+ case LEX_IS_LINE_COMMENT_START:
+ /* 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 == '*')
+ {
+ old_state = 3;
+ state = -2;
+ break;
+ }
+ else
+ {
+ UNGET (ch2);
+ }
+ } /* bad hack */
+
+ if (state == 0 || state == 1) /* Only comment at start of line. */
+ {
+ int startch;
+
+ startch = ch;
+
+ 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' || state != 0 || startch != '#')
+ {
+ /* Not a cpp line. */
+ while (ch != EOF && !IS_NEWLINE (ch))
+ ch = GET ();
+ if (ch == EOF)
+ as_warn (_("EOF in Comment: Newline inserted"));
+ state = 0;
+ PUT ('\n');
+ break;
+ }
+ /* Loks like `# 123 "filename"' from cpp. */
+ UNGET (ch);
+ old_state = 4;
+ state = -1;
+ if (scrub_m68k_mri)
+ out_string = "\tappline ";
+ else
+ out_string = "\t.appline ";
+ PUT (*out_string++);
+ break;
+ }
+
+#ifdef TC_D10V
+ /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true.
+ Trap is the only short insn that has a first operand that is
+ neither register nor label.
+ We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 .
+ We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is already
+ LEX_IS_LINE_COMMENT_START. However, it is the only character in
+ line_comment_chars for d10v, hence we can recognize it as such. */
+ /* An alternative approach would be to reset the state to 1 when
+ we see '||', '<'- or '->', but that seems to be overkill. */
+ if (state == 10) PUT (' ');
+#endif
+ /* 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 (tc_comment_chars, ch) == NULL
+ && (! scrub_m68k_mri
+ || (ch != '!' && ch != '*')))
+ goto de_fault;
+ if (scrub_m68k_mri
+ && (ch == '!' || ch == '*' || ch == '#')
+ && state != 1
+ && state != 10)
+ goto de_fault;
+ /* Fall through. */
+ case LEX_IS_COMMENT_START:
+#if defined TC_ARM && defined OBJ_ELF
+ /* On the ARM, `@' is the comment character.
+ Unfortunately this is also a special character in ELF .symver
+ directives (and .type, though we deal with those another way). So
+ we check if this line is such a directive, and treat the character
+ as default if so. This is a hack. */
+ if ((symver_state != NULL) && (*symver_state == 0))
+ goto de_fault;
+#endif
+ do
+ {
+ ch = GET ();
+ }
+ while (ch != EOF && !IS_NEWLINE (ch));
+ if (ch == EOF)
+ as_warn (_("end of file in comment; newline inserted"));
+ state = 0;
+ PUT ('\n');
+ break;
+
+ 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;
+ }
+
+ if (state == 3)
+ state = 9;
+
+ /* This is a common case. Quickly copy CH and all the
+ following symbol component or normal characters. */
+ if (to + 1 < toend
+ && mri_state == NULL
+#if defined TC_ARM && defined OBJ_ELF
+ && symver_state == NULL
+#endif
+ )
+ {
+ char *s;
+ int len;
+
+ for (s = from; s < fromend; s++)
+ {
+ int type;
+
+ ch2 = * (unsigned char *) 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 ();
+ }
+ }
+
+ /* 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;
+ }
+ }
+
+ /*NOTREACHED*/
+
+ 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 */