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Diffstat (limited to 'gas/app.c')
| -rw-r--r-- | gas/app.c | 1255 |
1 files changed, 1255 insertions, 0 deletions
diff --git a/gas/app.c b/gas/app.c new file mode 100644 index 0000000000..2a8df3ace5 --- /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 */ |