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|
/* input.c - input for bcc */
/* Copyright (C) 1992 Bruce Evans */
#define ARBITRARY_BACKSLASH_NEWLINES_NOT
#define INSERT_BACKSLASH_NEWLINES_NOT
#include "bcc.h"
#include "gencode.h"
#include "output.h"
#include "os.h"
#include "sc.h"
#include "scan.h"
#include "table.h"
#ifndef VERY_SMALL_MEMORY
#include "parse.h"
#endif
#undef EXTERN
#define EXTERN
#include "input.h"
#define INBUFSIZE 2048
#define NO_EOFHACK
struct fbufstruct /* file buffer structure */
{
struct fcbstruct fcb; /* status after opening an include sub-file */
char *fname; /* file name */
bool_t fname_malloced; /* nonzero if fname was malloced */
char pushback[3]; /* allows pushback to 2 before start of fbuf
* XXX 3 chars before?
* XXX should do everything in fbuf */
char fbuf[INBUFSIZE + 1]; /* buffer to read into */
};
#ifdef BUILTIN_CPP
struct inclist /* list of include file directories */
{
char *incdirname;
struct inclist *incnext;
};
PRIVATE char filemacro[] = "__FILE__";
PRIVATE struct inclist incabsolute; /* dummy list for absolute names */
/* depends on zero (NULL) init */
PRIVATE struct inclist incfirst;
/* begin include searches here for "" */
/* at next in list for <> */
/* -I directories are put in list */
/* between first and last */
PRIVATE struct inclist inclast =
{
#ifdef DEFAULT_INCLUDE_DIR
DEFAULT_INCLUDE_DIR,
#endif
NULL,
};
PRIVATE fastin_t inclevel; /* nest level of include files */
/* depends on zero init */
#endif
PRIVATE struct fbufstruct *inputbuf; /* current input file buffer */
/* its fcb only to date in includes */
/* depends on zero (NULL) init */
PRIVATE bool_t suppress_line_numbers;
#ifdef ARBITRARY_BACKSLASH_NEWLINES
FORWARD void backslash P((void));
#endif
#ifdef BUILTIN_CPP
FORWARD void definefile P((char *fname));
FORWARD void leaveinclude P((void));
#endif
FORWARD void inputinit P((char *fname, fd_t fd));
FORWARD void usage P((void));
#ifdef ARBITRARY_BACKSLASH_NEWLINES
PRIVATE void backslash()
{
static unsigned nbackslash;
if (nbackslash != 0)
--nbackslash;
more:
++nbackslash;
while (*(lineptr + 1) == '\\')
{
++nbackslash;
++lineptr;
}
if (*(lineptr + 1) != EOL)
{
if (--nbackslash != 0)
*--lineptr = '\\'; /* force look at current backslash again */
return;
}
ch = *++lineptr;
more1:
if (!eofile && lineptr >= input.limit)
skipeol();
if (ch == EOL)
{
--nbackslash;
if (eofile)
eofin("backslash-newline");
else
{
skipeol();
if (ch == EOL && !eofile && lineptr >= input.limit)
skipeol();
#ifdef COEOL /* XXX - this should go through specialchar() */
if (ch == COEOL)
{
ch = *++lineptr;
if (ch == EOL && !eofile && lineptr >= input.limit)
skipeol();
}
#endif
}
if (ch == '\\')
goto more;
if (nbackslash != 0 && ch == EOL && !eofile)
goto more1;
if (nbackslash != 0)
{
ch = *--lineptr = '\\';
if (--nbackslash != 0)
ch = *--lineptr = '\\';
}
return;
}
if (ch == '\\')
goto more;
if (ch == EOL && !eofile)
goto more1;
ch = *--lineptr = '\\'; /* pushback */
if (--nbackslash != 0)
ch = *--lineptr = '\\';
}
#endif
PUBLIC void closein()
{
#ifdef FAKE_INBUFSIZE_1
fclose(input.fp);
#else
close(input.fd);
#endif
#ifdef BUILTIN_CPP
while (inclevel != 0)
leaveinclude();
#endif
}
#ifdef BUILTIN_CPP
PRIVATE void definefile(fname)
char *fname;
{
char *def;
def = ourmalloc(sizeof filemacro - 1 + 2 + strlen(fname) + 1 + 1);
strcpy(def, filemacro);
strcat(def, "=\"");
strcat(def, fname);
strcat(def, "\"");
definestring(def);
ourfree(def);
}
#endif
PUBLIC void errorloc()
{
register struct fbufstruct *infbuf;
if ((infbuf = inputbuf) == NULL)
return;
outstr(infbuf->fname);
outbyte(':');
if (eofile)
outstr("eof");
else
{
outudec(input.linenumber);
outbyte('.');
#ifdef BUILTIN_CPP
if (maclevel == 0)
outudec((unsigned) (lineptr - inputbuf->fbuf) - input.lineoffset);
else
{
outudec((unsigned) (savedlineptr() - inputbuf->fbuf)
- input.lineoffset);
outstr(" (macro level ");
outudec((unsigned) maclevel);
outbyte(')');
}
#else
outudec((unsigned) (lineptr - inputbuf->fbuf) - input.lineoffset);
#endif
}
infbuf->fcb.includer = input.includer;
while ((infbuf = infbuf->fcb.includer) != NULL)
{
outstr(" (from ");
outstr(infbuf->fname);
outbyte(':');
outudec(infbuf->fcb.linenumber);
outbyte(')');
}
outstr(": ");
}
/* gch1() - get next char, advance ptr (only works on current line) */
PUBLIC void gch1()
{
if (SYMOFCHAR(ch = *++lineptr) != SPECIALCHAR)
return;
specialchar();
}
#ifdef BUILTIN_CPP
/* process #include */
PUBLIC void include()
{
char *dirnameptr;
char *dirnamend;
unsigned dirnamelen;
fd_t fd;
char *fnameptr;
char *fullnameptr;
struct inclist *incptr;
char terminator;
while (blanksident())
{
if ((gsymptr = findlorg(gsname)) == NULL ||
gsymptr->flags != DEFINITION)
break;
entermac();
}
if ((terminator = ch) == '<')
terminator = '>';
else if (terminator != '"')
{
error("bad file name");
return;
}
gch1();
fnameptr = charptr;
while (TRUE)
{
if (ch == EOL) /* no escapes in file names */
break;
if (ch == terminator)
{
gch1();
blanks();
break;
}
if (charptr >= chartop)
fnameptr = growobject(fnameptr, 1);
#ifdef TS
++ts_n_filename;
++ts_s_filename;
++ts_s_filename_tot;
#endif
*charptr++ = ch;
gch1();
}
if (charptr >= chartop)
fnameptr = growobject(fnameptr, 1);
#ifdef TS
++ts_n_filename_term;
++ts_s_filename_term;
++ts_s_filename_tot;
#endif
*charptr++ = 0;
dirnamend = NULL;
if (isabspath(fnameptr, &ch))
incptr = &incabsolute;
else
{
incptr = &incfirst;
if (terminator == '>')
incptr = incptr->incnext;
else
{
dirnameptr = inputbuf->fname;
if ((dirnamend = strrchr(dirnameptr, DIRCHAR)) == NULL)
incptr->incdirname = NULL;
else
{
*dirnamend = 0;
incptr->incdirname = dirnameptr;
}
}
}
do
{
if (incptr->incdirname == NULL)
{
fullnameptr = ourmalloc(strlen(fnameptr) + 1);
#ifdef TS
++ts_n_pathname;
ts_s_pathname += strlen(fnameptr) + 1;
ts_s_pathname_tot += strlen(fnameptr) + 1;
#endif
strcpy(fullnameptr, fnameptr);
}
else
{
dirnamelen = strlen(incptr->incdirname);
fullnameptr = ourmalloc(dirnamelen + (int) (charptr - fnameptr)
+ 2);
/* 2 extra for null and maybe DIRCHAR */
#ifdef TS
++ts_n_pathname;
ts_s_pathname += dirnamelen + (charptr - fnameptr) + 2;
ts_s_pathname_tot += dirnamelen + (charptr - fnameptr) + 2;
#endif
dirnameptr = fullnameptr + dirnamelen;
strcpy(fullnameptr, incptr->incdirname);
if (*fullnameptr != 0 && *(dirnameptr - 1) != DIRCHAR)
strcat(fullnameptr, DIRSTRING);
strcat(fullnameptr, fnameptr);
if (dirnamend != NULL)
{
*dirnamend = DIRCHAR;
dirnamend = NULL;
}
}
fd = open(fullnameptr, 0);
if (fd >= 0)
{
#ifdef TS
ts_s_filename_tot -= charptr - fnameptr;
#endif
charptr = fnameptr;
input.lineptr = lineptr;
inputbuf->fcb = input;
++inclevel; /* XXX - will run out of memory before overflow */
inputinit(fullnameptr, fd);
inputbuf->fname_malloced = TRUE;
return;
}
#ifdef TS
ts_s_pathname_tot -= strlen(fullnameptr) + 1;
#endif
ourfree(fullnameptr);
}
while ((incptr = incptr->incnext) != NULL);
fullnameptr = ourmalloc(strlen(fnameptr) + 40);
strcpy(fullnameptr, "cannot find include file ");
strcat(fullnameptr, fnameptr);
error(fullnameptr);
ourfree(fullnameptr);
#ifdef TS
ts_s_filename_tot -= charptr - fnameptr;
#endif
charptr = fnameptr;
}
#endif
/* initialise current input file */
PRIVATE void inputinit(fname, fd)
char *fname;
fd_t fd;
{
register struct fbufstruct *newinputbuf;
/* don't allocate after saying input.includer = inputbuf (to save a reg)
* or an error in the alloc would cycle trying to print the include list
*/
newinputbuf = (struct fbufstruct *) ourmalloc(sizeof *inputbuf);
#ifdef TS
++ts_n_inputbuf;
ts_s_inputbuf += sizeof *inputbuf;
ts_s_inputbuf_tot += sizeof *inputbuf;
#endif
input.fd = fd;
#ifdef FAKE_INBUFSIZE_1
input.fp = fdopen(fd, "r");
#endif
input.linenumber = 0;
input.lineoffset = 0;
input.includer = inputbuf;
inputbuf = newinputbuf;
newinputbuf->fname = fname;
newinputbuf->fname_malloced = FALSE;
#ifdef BUILTIN_CPP
undefinestring(filemacro);
definefile(fname);
if (orig_cppmode && !suppress_line_numbers)
outcpplinenumber(1, fname, input.includer == NULL ? "" : " 1");
#endif
*(input.limit = newinputbuf->fbuf) = EOL;
/* dummy line so processing can start with skipline() */
ch = *(lineptr = newinputbuf->fbuf - 1) = EOL;
}
PUBLIC void linecontol()
{
char linename[256];
char * ptr;
int i=0;
blanks();
input.linenumber = atoi(lineptr)-1;
while( SYMOFCHAR(ch) == INTCONST ) gch1();
blanks();
if( ch != '"' ) return;
for(ptr=lineptr+1; *ptr
&& *ptr != EOL
&& *ptr != '"'
&& i<sizeof(linename)-1; i++, ptr++)
linename[i] = *ptr;
linename[i] = '\0';
if (inputbuf->fname_malloced)
{
#ifdef TS
ts_s_pathname_tot -= strlen(inputbuf->fname) + 1;
#endif
ourfree(inputbuf->fname);
}
inputbuf->fname_malloced = TRUE;
ptr = ourmalloc(strlen(linename)+1);
strcpy(ptr, linename);
inputbuf->fname = ptr;
ptr=lineptr;
#ifdef BUILTIN_CPP
undefinestring(filemacro);
definefile(inputbuf->fname);
#endif
ch = *(lineptr = ptr);
}
#ifdef BUILTIN_CPP
/* switch from include file to file which included it */
PRIVATE void leaveinclude()
{
--inclevel;
if (inputbuf->fname_malloced)
{
#ifdef TS
ts_s_pathname_tot -= strlen(inputbuf->fname) + 1;
#endif
ourfree(inputbuf->fname);
}
#ifdef TS
ts_s_inputbuf_tot -= sizeof *inputbuf;
#endif
ourfree((char *) inputbuf);
#ifndef NO_EOFHACK
if(input.fd>=0)
#endif
close(input.fd);
#ifdef FAKE_INBUFSIZE_1
fclose(input.fp);
#endif
inputbuf = input.includer;
input = inputbuf->fcb;
undefinestring(filemacro);
definefile(inputbuf->fname);
ch = *(lineptr = input.lineptr);
skipline();
if (orig_cppmode && !suppress_line_numbers)
outcpplinenumber(input.linenumber, inputbuf->fname, " 2");
}
#endif
/* open input and output files and get options */
PUBLIC void openio(argc, argv)
int argc;
char *argv[];
{
register char *arg;
int argn;
fd_t fd;
char *fname;
#ifdef BUILTIN_CPP
struct inclist *incnew;
struct inclist *incptr;
#endif
bool_t flag[128];
#if 0
lineptr = "\n"; /* empty line in case error message */
#endif
fd = 0; /* standard input */
memset(flag, 0, sizeof flag);
#ifdef I80386
flag['3'] = sizeof (int) >= 4;
#endif
fname = "stdin";
#ifdef BUILTIN_CPP
(incptr = &incfirst)->incnext = &inclast;
#endif
initout();
for (argn = 1; argn < argc; ++argn)
{
arg = argv[argn];
if (*arg != '-')
{
if (fd != 0)
fatalerror("more than one input file");
fname = arg;
if ((fd = open(arg, 0)) < 0)
fatalerror("cannot open input");
}
else
switch (arg[1])
{
#ifdef I8088
case '0': /* generate 16-bit code */
#endif
#ifdef I80386
case '3': /* generate 32-bit code */
#endif
case 'c': /* caller saves */
#ifdef DBNODE
case 'd': /* print debugging information in asm output */
#endif
#ifdef BUILTIN_CPP
case 'E': /* acting as cpp */
#endif
case 'f': /* pass first argument in register */
#ifdef DYNAMIC_LONG_ORDER
case 'l': /* long big-endian */
#endif
case 'P': /* if acting as cpp, suppress line numbers */
#ifdef POSINDEPENDENT
case 'p': /* generate almost-position-independent code */
#endif
case 't': /* print source code in asm output */
case 'w': /* watch location counter */
#ifndef VERY_SMALL_MEMORY
case '7': /* accept ancient K&R code */
#endif
case 'O': /* Optimisation. */
if (arg[2] == 0)
flag[(int)arg[1]] = TRUE;
else if (arg[2] == '-' && arg[3] == 0)
flag[(int)arg[1]] = FALSE;
else
usage();
if (arg[1] == '0') /* flag 0 is negative logic flag 3 */
flag['3'] = TRUE + FALSE - flag['0'];
break;
#ifdef BUILTIN_CPP
case 'D':
definestring(arg + 2);
break;
case 'I':
(incnew = (struct inclist *) ourmalloc(sizeof *incnew))
->incdirname = arg + 2;
#ifdef TS
++ts_n_includelist;
ts_s_includelist += sizeof *incnew;
#endif
incnew->incnext = incptr->incnext;
incptr = incptr->incnext = incnew;
break;
case 'U':
undefinestring(arg + 2);
break;
#endif
case 'o':
if (arg[2] != 0 || ++argn >= argc)
usage();
openout(argv[argn]);
break;
default:
usage();
break;
}
}
#ifdef BUILTIN_CPP
#ifdef I8088
#ifdef I80386
if (flag['3'])
{
i386_32 = TRUE;
definestring("__AS386_32__");
definestring("__i386__");
}
else
#endif
{
definestring("__AS386_16__");
definestring("__8086__");
}
#endif
#ifdef MC6809
definestring("__AS09__");
#endif
if (flag['c'])
{
callersaves = TRUE;
definestring("__CALLER_SAVES__");
}
#ifdef DBNODE
dbnodeon = flag['d'];
#endif
orig_cppmode = cppmode = flag['E'];
if (flag['f'])
{
arg1inreg = TRUE;
#ifdef I8088
definestring("__FIRST_ARG_IN_AX__");
#endif
#ifdef MC6808
definestring("__FIRST_ARG_IN_X__");
#endif
}
arg1op = arg1inreg ? ROOTLISTOP : LISTOP;
#ifdef DYNAMIC_LONG_ORDER
if (flag['l'])
{
long_big_endian = TRUE;
definestring("__LONG_BIG_ENDIAN__");
}
#endif
suppress_line_numbers = flag['P'];
#ifdef POSINDEPENDENT
if (flag['p'])
{
posindependent = TRUE;
definestring("__POS_INDEPENDENT__");
}
#endif
#ifndef VERY_SMALL_MEMORY
if (flag['7'])
{
ancient = TRUE;
definestring("__ANCIENT__");
}
#endif
if (flag['O'])
{
optimise = TRUE;
definestring("__OPTIMISED__");
}
#ifdef NOFLOAT
definestring("__HAS_NO_FLOATS__");
#endif
#else /* !BUILTIN_CPP */
#ifdef I80386
if (flag['3']) i386_32 = TRUE;
#endif
if (flag['c']) callersaves = TRUE;
#ifdef DBNODE
dbnodeon = flag['d'];
#endif
if (flag['f']) arg1inreg = TRUE;
arg1op = arg1inreg ? ROOTLISTOP : LISTOP;
#ifdef DYNAMIC_LONG_ORDER
if (flag['l']) long_big_endian = TRUE;
#endif
suppress_line_numbers = flag['P'];
#ifdef POSINDEPENDENT
if (flag['p']) posindependent = TRUE;
#endif
if (flag['O']) optimise = TRUE;
#endif
ctext = flag['t'];
#ifdef DBNODE
if (ctext) dbnodeon = 1;
#endif
watchlc = flag['w'];
setoutbufs();
inputinit(fname, fd);
}
/* advance over EOL sentinel to new line */
PUBLIC void skipeol()
{
#ifdef FAKE_INBUFSIZE_1
static int ich;
#endif
#ifdef INSERT_BACKSLASH_NEWLINES
static int bs_state;
static bool_t skip_printing_nl;
#endif
int nread;
debug(7, "skipeol %s:%d", inputbuf->fname, input.linenumber);
if (eofile)
return;
if (lineptr < input.limit)
{
++input.linenumber;
ch = *++lineptr;
if (ctext && !asmmode)
{
comment();
outudec(input.linenumber);
outbyte(' ');
outline(lineptr);
}
#ifdef BUILTIN_CPP
#ifndef ASM_BARE
if (!virtual_nl && (orig_cppmode || asmmode))
#else
if (orig_cppmode && !asmmode)
#endif
#ifdef INSERT_BACKSLASH_NEWLINES
if (!skip_printing_nl)
#endif
outbyte('\n');
#else /* !BUILTIN_CPP */
if (asmmode)
#ifdef INSERT_BACKSLASH_NEWLINES
if (!skip_printing_nl)
#endif
outbyte('\n');
#endif
#ifdef INSERT_BACKSLASH_NEWLINES
if (bs_state == 1 && *(lineptr - 1) == EOL)
#endif
input.lineoffset = (int) (lineptr - inputbuf->fbuf);
return;
}
input.lineoffset -= (int) (lineptr - inputbuf->fbuf);
#ifdef FAKE_INBUFSIZE_1
lineptr = inputbuf->fbuf;
#ifdef INSERT_BACKSLASH_NEWLINES
switch (bs_state)
{
case0:
case 0:
bs_state = nread = (ich = getc(input.fp)) == EOF ? 0 : 1;
skip_printing_nl = FALSE;
break;
case 1:
if (ich == '\\')
goto case0; /* avoid chance of splitting \EOL */
ich = '\\';
nread = 1;
bs_state = 2;
++input.lineoffset;
break;
case 2:
ich = EOL;
nread = 1;
bs_state = 0;
skip_printing_nl = TRUE;
++input.lineoffset;
--input.linenumber;
break;
}
#else
nread = (ich = getc(input.fp)) == EOF ? 0 : 1;
#endif
*lineptr = ich;
#else
#ifndef NO_EOFHACK
if(input.fd<0)
nread=0;
else
{
#endif
nread = read(input.fd, lineptr = inputbuf->fbuf, INBUFSIZE);
#ifndef NO_EOFHACK
#ifdef BUILTIN_CPP
if( nread == 0 && inclevel > 0 )
{
close(input.fd);
input.fd = -1;
memcpy(inputbuf->fbuf, "\n", 1);
nread = 1;
}
#endif
}
#endif
#endif
if (nread < 0)
fatalerror("input error");
*(input.limit = lineptr + nread) = EOL;
ch = *lineptr;
if (nread == 0)
{
#ifdef BUILTIN_CPP
if (inclevel == 0)
{
eofile = TRUE;
checknotinif();
}
else
{
leaveinclude();
skipeol();
}
#else
eofile = TRUE;
#endif
return;
}
if (ctext && !asmmode)
{
comment();
outudec(input.linenumber);
outbyte(' ');
outline(lineptr);
}
}
PUBLIC void specialchar()
{
#ifdef BUILTIN_CPP
if (maclevel != 0)
{
if (ch == EOL) /* it might also be backslash or COEOL */
leavemac();
if (ch != EOL)
return;
}
#endif
more:
#ifdef ARBITRARY_BACKSLASH_NEWLINES
if (ch == '\\')
backslash();
#endif
if (!eofile && lineptr >= input.limit)
{
skipeol();
#ifdef ARBITRARY_BACKSLASH_NEWLINES
if (ch == '\\')
backslash();
#endif
}
#ifndef ARBITRARY_BACKSLASH_NEWLINES
if (ch == '\\')
{
if (*(lineptr + 1) == EOL)
{
if (lineptr + 1 >= input.limit)
{
++lineptr;
skipeol();
ch = *--lineptr = '\\'; /* pushback */
}
if (*(lineptr + 1) == EOL)
{
if (eofile)
eofin("backslash-newline");
else
{
++lineptr;
skipeol();
if (SYMOFCHAR(ch) == SPECIALCHAR)
{
#ifdef COEOL
if (ch != COEOL
|| SYMOFCHAR(ch = *++lineptr) == SPECIALCHAR)
#endif
goto more;
}
}
}
}
#endif
}
#ifdef COEOL
if (ch == EOL && !eofile)
{
if (*(lineptr + 1) == EOL && lineptr + 1 >= input.limit)
{
++lineptr;
skipeol(); /* refill buffer */
ch = *--lineptr = EOL; /* pushback */
}
if (*(lineptr + 1) == COEOL)
*++lineptr = EOL; /* discard COEOL */
}
#endif
}
PRIVATE void usage()
{
fatalerror(
#ifdef BUILTIN_CPP
# ifdef MC6809
"usage: cc1 [-cdfptw[-]] [-Ddefine] [-Iincdir] [-Uundef] [-o outfile] [infile]"
# else
# ifdef I80386
"usage: cc1 [-03cdfltw[-]] [-Ddefine] [-Iincdir] [-Uundef] [-o outfile] [infile]"
# else
"usage: cc1 [-cdfltw[-]] [-Ddefine] [-Iincdir] [-Uundef] [-o outfile] [infile]"
# endif
# endif
#else
# ifdef I80386
"usage: cc1 [-03cdfltw[-]] [-o outfile] [infile]"
# else
"usage: cc1 [-cdfltw[-]] [-o outfile] [infile]"
# endif
#endif
);
}
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