/* input_scrub.c - Break up input buffers into whole numbers of lines.
- Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
-
+ Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
+
This file is part of GAS, the GNU Assembler.
-
+
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
-
+
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#include <errno.h> /* Need this to make errno declaration right */
+#include <errno.h> /* Need this to make errno declaration right */
#include "as.h"
#include "input-file.h"
+#include "sb.h"
/*
* O/S independent module to supply buffers of sanitised source code
- * to rest of assembler. We get sanitized input data of arbitrary length.
+ * to rest of assembler. We get sanitised input data of arbitrary length.
* We break these buffers on line boundaries, recombine pieces that
* were broken across buffers, and return a buffer of full lines to
* the caller.
*/
\f
#define BEFORE_STRING ("\n")
-#define AFTER_STRING ("\0") /* bcopy of 0 chars might choke. */
+#define AFTER_STRING ("\0") /* memcpy of 0 chars might choke. */
#define BEFORE_SIZE (1)
#define AFTER_SIZE (1)
-static char * buffer_start; /*->1st char of full buffer area. */
-static char * partial_where; /*->after last full line in buffer. */
+static char *buffer_start; /*->1st char of full buffer area. */
+static char *partial_where; /*->after last full line in buffer. */
static int partial_size; /* >=0. Number of chars in partial line in buffer. */
-static char save_source [AFTER_SIZE];
+static char save_source[AFTER_SIZE];
/* Because we need AFTER_STRING just after last */
/* full line, it clobbers 1st part of partial */
/* line. So we preserve 1st part of partial */
/* line here. */
-static int buffer_length; /* What is the largest size buffer that */
+static unsigned int buffer_length; /* What is the largest size buffer that */
/* input_file_give_next_buffer() could */
/* return to us? */
-/* Saved information about the file that .include'd this one. When we hit EOF,
- we automatically pop to that file. */
+/* The index into an sb structure we are reading from. -1 if none. */
+static int sb_index = -1;
+
+/* If we are reading from an sb structure, this is it. */
+static sb from_sb;
-static char *next_saved_file;
+/* The number of nested sb structures we have included. */
+static int macro_nest;
/* We can have more than one source file open at once, though the info for all
but the latest one are saved off in a struct input_save. These files remain
source line numbers. Whenever we open a file we must fill in
physical_input_file. So if it is NULL we have not opened any files yet. */
-char *physical_input_file;
-char *logical_input_file;
+static char *physical_input_file;
+static char *logical_input_file;
-typedef unsigned int line_numberT; /* 1-origin line number in a source file. */
+typedef unsigned int line_numberT; /* 1-origin line number in a source file. */
/* A line ends in '\n' or eof. */
-line_numberT physical_input_line;
-line_numberT logical_input_line;
+static line_numberT physical_input_line;
+static int logical_input_line;
/* Struct used to save the state of the input handler during include files */
-struct input_save {
- char *buffer_start;
- char *partial_where;
- int partial_size;
- char save_source [AFTER_SIZE];
- int buffer_length;
- char *physical_input_file;
- char *logical_input_file;
- line_numberT physical_input_line;
- line_numberT logical_input_line;
- char *next_saved_file; /* Chain of input_saves */
- char *input_file_save; /* Saved state of input routines */
- char *saved_position; /* Caller's saved position in buf */
-};
-
-#ifdef __STDC__
-static void as_1_char(unsigned int c, FILE *stream);
-#else /* __STDC__ */
-static void as_1_char();
-#endif /* __STDC__ */
+struct input_save
+ {
+ char *buffer_start;
+ char *partial_where;
+ int partial_size;
+ char save_source[AFTER_SIZE];
+ unsigned int buffer_length;
+ char *physical_input_file;
+ char *logical_input_file;
+ line_numberT physical_input_line;
+ int logical_input_line;
+ int sb_index;
+ sb from_sb;
+ struct input_save *next_saved_file; /* Chain of input_saves */
+ char *input_file_save; /* Saved state of input routines */
+ char *saved_position; /* Caller's saved position in buf */
+ };
+
+static struct input_save *input_scrub_push PARAMS ((char *saved_position));
+static char *input_scrub_pop PARAMS ((struct input_save *arg));
+static void as_1_char PARAMS ((unsigned int c, FILE * stream));
+
+/* Saved information about the file that .include'd this one. When we hit EOF,
+ we automatically pop to that file. */
+
+static struct input_save *next_saved_file;
/* Push the state of input reading and scrubbing so that we can #include.
The return value is a 'void *' (fudged for old compilers) to a save
area, which can be restored by passing it to input_scrub_pop(). */
-char *input_scrub_push(saved_position)
-char *saved_position;
+static struct input_save *
+input_scrub_push (saved_position)
+ char *saved_position;
{
- register struct input_save *saved;
-
- saved = (struct input_save *) xmalloc(sizeof *saved);
-
- saved->saved_position = saved_position;
- saved->buffer_start = buffer_start;
- saved->partial_where = partial_where;
- saved->partial_size = partial_size;
- saved->buffer_length = buffer_length;
- saved->physical_input_file = physical_input_file;
- saved->logical_input_file = logical_input_file;
- saved->physical_input_line = physical_input_line;
- saved->logical_input_line = logical_input_line;
- bcopy(saved->save_source, save_source, sizeof(save_source));
- saved->next_saved_file = next_saved_file;
- saved->input_file_save = input_file_push();
-
- input_scrub_begin(); /* Reinitialize! */
-
- return((char *) saved);
-} /* input_scrub_push() */
-
-char *
- input_scrub_pop (arg)
-char *arg;
+ register struct input_save *saved;
+
+ saved = (struct input_save *) xmalloc (sizeof *saved);
+
+ saved->saved_position = saved_position;
+ saved->buffer_start = buffer_start;
+ saved->partial_where = partial_where;
+ saved->partial_size = partial_size;
+ saved->buffer_length = buffer_length;
+ saved->physical_input_file = physical_input_file;
+ saved->logical_input_file = logical_input_file;
+ saved->physical_input_line = physical_input_line;
+ saved->logical_input_line = logical_input_line;
+ saved->sb_index = sb_index;
+ saved->from_sb = from_sb;
+ memcpy (saved->save_source, save_source, sizeof (save_source));
+ saved->next_saved_file = next_saved_file;
+ saved->input_file_save = input_file_push ();
+
+ input_file_begin (); /* Reinitialize! */
+ logical_input_line = -1;
+ logical_input_file = (char *) NULL;
+ buffer_length = input_file_buffer_size ();
+
+ buffer_start = xmalloc ((BEFORE_SIZE + buffer_length + buffer_length + AFTER_SIZE));
+ memcpy (buffer_start, BEFORE_STRING, (int) BEFORE_SIZE);
+
+ return saved;
+} /* input_scrub_push() */
+
+static char *
+input_scrub_pop (saved)
+ struct input_save *saved;
{
- register struct input_save *saved;
- char *saved_position;
-
- input_scrub_end (); /* Finish off old buffer */
-
- saved = (struct input_save *)arg;
-
- input_file_pop (saved->input_file_save);
- saved_position = saved->saved_position;
- buffer_start = saved->buffer_start;
- buffer_length = saved->buffer_length;
- physical_input_file = saved->physical_input_file;
- logical_input_file = saved->logical_input_file;
- physical_input_line = saved->physical_input_line;
- logical_input_line = saved->logical_input_line;
- partial_where = saved->partial_where;
- partial_size = saved->partial_size;
- next_saved_file = saved->next_saved_file;
- bcopy (save_source, saved->save_source, sizeof (save_source));
-
- free(arg);
- return saved_position;
+ char *saved_position;
+
+ input_scrub_end (); /* Finish off old buffer */
+
+ input_file_pop (saved->input_file_save);
+ saved_position = saved->saved_position;
+ buffer_start = saved->buffer_start;
+ buffer_length = saved->buffer_length;
+ physical_input_file = saved->physical_input_file;
+ logical_input_file = saved->logical_input_file;
+ physical_input_line = saved->physical_input_line;
+ logical_input_line = saved->logical_input_line;
+ sb_index = saved->sb_index;
+ from_sb = saved->from_sb;
+ partial_where = saved->partial_where;
+ partial_size = saved->partial_size;
+ next_saved_file = saved->next_saved_file;
+ memcpy (save_source, saved->save_source, sizeof (save_source));
+
+ free (saved);
+ return saved_position;
}
-
\f
+
void
- input_scrub_begin ()
+input_scrub_begin ()
{
- know(strlen(BEFORE_STRING) == BEFORE_SIZE);
- know(strlen(AFTER_STRING) == AFTER_SIZE || (AFTER_STRING[0] == '\0' && AFTER_SIZE == 1));
-
- input_file_begin ();
-
- buffer_length = input_file_buffer_size ();
-
- buffer_start = xmalloc((long)(BEFORE_SIZE + buffer_length + buffer_length + AFTER_SIZE));
- bcopy (BEFORE_STRING, buffer_start, (int)BEFORE_SIZE);
-
- /* Line number things. */
- logical_input_line = 0;
- logical_input_file = (char *)NULL;
- physical_input_file = NULL; /* No file read yet. */
- next_saved_file = NULL; /* At EOF, don't pop to any other file */
- do_scrub_begin();
+ know (strlen (BEFORE_STRING) == BEFORE_SIZE);
+ know (strlen (AFTER_STRING) == AFTER_SIZE || (AFTER_STRING[0] == '\0' && AFTER_SIZE == 1));
+
+ input_file_begin ();
+
+ buffer_length = input_file_buffer_size ();
+
+ buffer_start = xmalloc ((BEFORE_SIZE + buffer_length + buffer_length + AFTER_SIZE));
+ memcpy (buffer_start, BEFORE_STRING, (int) BEFORE_SIZE);
+
+ /* Line number things. */
+ logical_input_line = -1;
+ logical_input_file = (char *) NULL;
+ physical_input_file = NULL; /* No file read yet. */
+ next_saved_file = NULL; /* At EOF, don't pop to any other file */
+ do_scrub_begin ();
}
void
- input_scrub_end ()
+input_scrub_end ()
{
- if (buffer_start)
- {
- free (buffer_start);
- buffer_start = 0;
- input_file_end ();
- }
+ if (buffer_start)
+ {
+ free (buffer_start);
+ buffer_start = 0;
+ input_file_end ();
+ }
}
/* Start reading input from a new file. */
char * /* Return start of caller's part of buffer. */
- input_scrub_new_file (filename)
-char * filename;
+input_scrub_new_file (filename)
+ char *filename;
{
- input_file_open (filename, !flagseen['f']);
- physical_input_file = filename[0] ? filename : "{standard input}";
- physical_input_line = 0;
-
- partial_size = 0;
- return (buffer_start + BEFORE_SIZE);
+ input_file_open (filename, !flag_no_comments);
+ physical_input_file = filename[0] ? filename : "{standard input}";
+ physical_input_line = 0;
+
+ partial_size = 0;
+ return (buffer_start + BEFORE_SIZE);
}
input_scrub_new_file. */
char *
- input_scrub_include_file (filename, position)
-char *filename;
-char *position;
+input_scrub_include_file (filename, position)
+ char *filename;
+ char *position;
{
- next_saved_file = input_scrub_push(position);
- return input_scrub_new_file (filename);
+ next_saved_file = input_scrub_push (position);
+ return input_scrub_new_file (filename);
}
+/* Start getting input from an sb structure. This is used when
+ expanding a macro. */
+
void
- input_scrub_close ()
+input_scrub_include_sb (from, position)
+ sb *from;
+ char *position;
{
- input_file_close ();
+ if (macro_nest > max_macro_nest)
+ as_fatal ("macros nested too deeply");
+ ++macro_nest;
+
+ next_saved_file = input_scrub_push (position);
+
+ sb_new (&from_sb);
+ /* Add the sentinel required by read.c. */
+ sb_add_char (&from_sb, '\n');
+ sb_add_sb (&from_sb, from);
+ sb_index = 1;
+
+ /* These variables are reset by input_scrub_push. Restore them
+ since we are, after all, still at the same point in the file. */
+ logical_input_line = next_saved_file->logical_input_line;
+ logical_input_file = next_saved_file->logical_input_file;
}
+
+void
+input_scrub_close ()
+{
+ input_file_close ();
+}
+
char *
- input_scrub_next_buffer (bufp)
-char **bufp;
+input_scrub_next_buffer (bufp)
+ char **bufp;
{
- register char * limit; /*->just after last char of buffer. */
-
- *bufp = buffer_start + BEFORE_SIZE;
-
-#ifdef DONTDEF
- if(preprocess) {
- if(save_buffer) {
- *bufp = save_buffer;
- save_buffer = 0;
- }
- limit = input_file_give_next_buffer(buffer_start+BEFORE_SIZE);
- if (!limit) {
- partial_where = 0;
- if(partial_size)
- as_warn("Partial line at end of file ignored");
- return partial_where;
- }
-
- if(partial_size)
- bcopy(save_source, partial_where,(int)AFTER_SIZE);
- do_scrub(partial_where,partial_size,buffer_start+BEFORE_SIZE,limit-(buffer_start+BEFORE_SIZE),&out_string,&out_length);
- limit=out_string + out_length;
- for(p=limit;*--p!='\n';)
- ;
- p++;
- if(p<=buffer_start+BEFORE_SIZE)
- as_fatal("Source line too long. Please change file '%s' and re-make the assembler.", __FILE__);
-
- partial_where = p;
- partial_size = limit-p;
- bcopy(partial_where, save_source,(int)AFTER_SIZE);
- bcopy(AFTER_STRING, partial_where, (int)AFTER_SIZE);
-
- save_buffer = *bufp;
- *bufp = out_string;
-
- return partial_where;
+ register char *limit; /*->just after last char of buffer. */
+
+ if (sb_index >= 0)
+ {
+ if (sb_index >= from_sb.len)
+ {
+ sb_kill (&from_sb);
+ --macro_nest;
+ partial_where = NULL;
+ if (next_saved_file != NULL)
+ *bufp = input_scrub_pop (next_saved_file);
+ return partial_where;
}
-
- /* We're not preprocessing. Do the right thing */
-#endif
- if (partial_size)
- {
- bcopy (partial_where, buffer_start + BEFORE_SIZE, (int)partial_size);
- bcopy (save_source, buffer_start + BEFORE_SIZE, (int)AFTER_SIZE);
- }
- limit = input_file_give_next_buffer (buffer_start + BEFORE_SIZE + partial_size);
- if (limit)
- {
- register char * p; /* Find last newline. */
-
- for (p = limit; * -- p != '\n';)
- {
- }
- ++ p;
- if (p <= buffer_start + BEFORE_SIZE)
- {
- as_fatal("Source line too long. Please change file %s then rebuild assembler.", __FILE__);
- }
- partial_where = p;
- partial_size = limit - p;
- bcopy (partial_where, save_source, (int)AFTER_SIZE);
- bcopy (AFTER_STRING, partial_where, (int)AFTER_SIZE);
- }
- else
- {
- partial_where = 0;
- if (partial_size > 0)
- {
- as_warn("Partial line at end of file ignored");
- }
- /* If we should pop to another file at EOF, do it. */
- if (next_saved_file)
- {
- *bufp = input_scrub_pop (next_saved_file); /* Pop state */
- /* partial_where is now correct to return, since we popped it. */
- }
- }
- return (partial_where);
-}
+
+ partial_where = from_sb.ptr + from_sb.len;
+ partial_size = 0;
+ *bufp = from_sb.ptr + sb_index;
+ sb_index = from_sb.len;
+ return partial_where;
+ }
+
+ *bufp = buffer_start + BEFORE_SIZE;
+
+ if (partial_size)
+ {
+ memcpy (buffer_start + BEFORE_SIZE, partial_where,
+ (unsigned int) partial_size);
+ memcpy (buffer_start + BEFORE_SIZE, save_source, AFTER_SIZE);
+ }
+ limit = input_file_give_next_buffer (buffer_start
+ + BEFORE_SIZE
+ + partial_size);
+ if (limit)
+ {
+ register char *p; /* Find last newline. */
+
+ for (p = limit; *--p != '\n';);;
+ ++p;
+ if (p <= buffer_start + BEFORE_SIZE)
+ {
+ as_fatal ("Source line too long. Please change file %s then rebuild assembler.", __FILE__);
+ }
+ partial_where = p;
+ partial_size = limit - p;
+ memcpy (save_source, partial_where, (int) AFTER_SIZE);
+ memcpy (partial_where, AFTER_STRING, (int) AFTER_SIZE);
+ }
+ else
+ {
+ partial_where = 0;
+ if (partial_size > 0)
+ {
+ as_warn ("Partial line at end of file ignored");
+ }
+ /* If we should pop to another file at EOF, do it. */
+ if (next_saved_file)
+ {
+ *bufp = input_scrub_pop (next_saved_file); /* Pop state */
+ /* partial_where is now correct to return, since we popped it. */
+ }
+ }
+ return (partial_where);
+} /* input_scrub_next_buffer() */
\f
/*
* The remaining part of this file deals with line numbers, error
int
- seen_at_least_1_file () /* TRUE if we opened any file. */
+seen_at_least_1_file () /* TRUE if we opened any file. */
{
- return (physical_input_file != NULL);
+ return (physical_input_file != NULL);
}
void
- bump_line_counters ()
+bump_line_counters ()
{
- ++ physical_input_line;
- /* ++ logical_input_line; FIXME-now remove this. */
+ if (sb_index < 0)
+ {
+ ++physical_input_line;
+ if (logical_input_line >= 0)
+ ++logical_input_line;
+ }
}
\f
/*
* new_logical_line()
*
* Tells us what the new logical line number and file are.
- * If the line_number is <0, we don't change the current logical line number.
+ * If the line_number is -1, we don't change the current logical line
+ * number. If it is -2, we decrement the logical line number (this is
+ * to support the .appfile pseudo-op inserted into the stream by
+ * do_scrub_chars).
* If the fname is NULL, we don't change the current logical file name.
*/
-void new_logical_line(fname, line_number)
-char *fname; /* DON'T destroy it! We point to it! */
-int line_number;
+void
+new_logical_line (fname, line_number)
+ char *fname; /* DON'T destroy it! We point to it! */
+ int line_number;
{
- if (fname) {
- logical_input_file = fname;
- } /* if we have a file name */
-
- if (line_number >= 0) {
- logical_input_line = line_number;
- } /* if we have a line number */
-} /* new_logical_line() */
+ if (fname)
+ {
+ logical_input_file = fname;
+ } /* if we have a file name */
+
+ if (line_number >= 0)
+ logical_input_line = line_number;
+ else if (line_number == -2 && logical_input_line > 0)
+ --logical_input_line;
+} /* new_logical_line() */
\f
/*
* a s _ w h e r e ()
*
- * Write a line to stderr locating where we are in reading
- * input source files.
- * As a sop to the debugger of AS, pretty-print the offending line.
+ * Return the current file name and line number.
+ * namep should be char * const *, but there are compilers which screw
+ * up declarations like that, and it's easier to avoid it.
*/
-void as_where() {
- char *p;
- line_numberT line;
-
- if (logical_input_file && (logical_input_line > 0)) {
- p = logical_input_file;
- line = logical_input_line;
- } else {
- p = physical_input_file;
- line = physical_input_line;
- } /* line number should match file name */
-
- fprintf(stderr, "%s:%u: ", p, line);
-
-#ifdef DONTDEF
- if (physical_input_file) {
- if (input_file_is_open()) { /* we can still read lines from source */
- fprintf (stderr," @ physical line %ld., file \"%s\"",
- (long) physical_input_line, physical_input_file);
- fprintf (stderr," @ logical line %ld., file \"%s\"\n",
- (long) logical_input_line, logical_input_file);
- (void)putc(' ', stderr);
- as_howmuch (stderr);
- (void)putc('\n', stderr);
- } else {
- fprintf(stderr, " After reading source.\n");
- } /* input file is still open */
- } else {
- fprintf(stderr, " Before reading source.\n");
- } /* we tried to read SOME source */
-#endif /* DONTDEF */
-
- return;
-} /* as_where() */
+void
+as_where (namep, linep)
+ char **namep;
+ unsigned int *linep;
+{
+ if (logical_input_file != NULL
+ && (linep == NULL || logical_input_line >= 0))
+ {
+ *namep = logical_input_file;
+ if (linep != NULL)
+ *linep = logical_input_line;
+ }
+ else if (physical_input_file != NULL)
+ {
+ *namep = physical_input_file;
+ if (linep != NULL)
+ *linep = physical_input_line;
+ }
+ else
+ {
+ *namep = 0;
+ if (linep != NULL)
+ *linep = 0;
+ }
+} /* as_where() */
+\f
-\f
/*
* a s _ h o w m u c h ()
*
* No free '\n' at end of line.
*/
void
- as_howmuch (stream)
-FILE * stream; /* Opened for write please. */
+as_howmuch (stream)
+ FILE *stream; /* Opened for write please. */
{
- register char * p; /* Scan input line. */
- /* register char c; JF unused */
-
- for (p = input_line_pointer - 1; * p != '\n'; --p)
- {
- }
- ++ p; /* p->1st char of line. */
- for (; p <= input_line_pointer; p++)
- {
- /* Assume ASCII. EBCDIC & other micro-computer char sets ignored. */
- /* c = *p & 0xFF; JF unused */
- as_1_char(*p, stream);
- }
+ register char *p; /* Scan input line. */
+ /* register char c; JF unused */
+
+ for (p = input_line_pointer - 1; *p != '\n'; --p)
+ {
+ }
+ ++p; /* p->1st char of line. */
+ for (; p <= input_line_pointer; p++)
+ {
+ /* Assume ASCII. EBCDIC & other micro-computer char sets ignored. */
+ as_1_char ((unsigned char) *p, stream);
+ }
}
-static void as_1_char (c,stream)
-unsigned int c;
-FILE *stream;
+static void
+as_1_char (c, stream)
+ unsigned int c;
+ FILE *stream;
{
- if (c > 127)
- {
- (void)putc('%', stream);
- c -= 128;
- }
- if (c < 32)
- {
- (void)putc('^', stream);
- c += '@';
- }
- (void)putc(c, stream);
+ if (c > 127)
+ {
+ (void) putc ('%', stream);
+ c -= 128;
+ }
+ if (c < 32)
+ {
+ (void) putc ('^', stream);
+ c += '@';
+ }
+ (void) putc (c, stream);
}
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
-
/* end of input_scrub.c */
projects / deliverable / binutils-gdb.git / blobdiff