/*
 * Copyright (c) 1985 Sun Microsystems, Inc.
 * Copyright (c) 1980 The Regents of the University of California.
 * Copyright (c) 1976 Board of Trustees of the University of Illinois.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley, the University of Illinois,
 * Urbana, and Sun Microsystems, Inc.  The name of either University
 * or Sun Microsystems may not be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)io.c       5.10 (Berkeley) 9/15/88";
#endif /* not lint */

#include "XGLOBS.H"
#include <ctype.h>


int	    comment_open;
static	    paren_target;

dump_line()
{			       /* dump_line is the routine that actually
				* effects the printing of the new source. It
				* prints the label section, followed by the
				* code section with the appropriate nesting
				* level, followed by any comments */
    register int cur_col,
		target_col;
    static	not_first_line;

    if (ps.procname[0]) {
       if (troff) {
	   if (comment_open) {
	       comment_open = 0;
	       fprintf(output, ".*/\n");
	   }
	   fprintf(output, ".Pr \"%s\"\n", ps.procname);
       }
       ps.ind_level = 0;
       ps.procname[0] = 0;
    }
    if (s_code == e_code && s_lab == e_lab && s_com == e_com) {
       if (suppress_blanklines > 0)
	   suppress_blanklines--;
       else {
	   ps.bl_line = true;
	   n_real_blanklines++;
       }
    }
    else if (!inhibit_formatting) {
       suppress_blanklines = 0;
       ps.bl_line = false;
       if (prefix_blankline_requested && not_first_line)
	   if (swallow_optional_blanklines) {
	       if (n_real_blanklines == 1)
		   n_real_blanklines = 0;
	   }
	   else {
	       if (n_real_blanklines == 0)
		   n_real_blanklines = 1;
	   }
       while (--n_real_blanklines >= 0)
	   putc('\n', output);
       n_real_blanklines = 0;
       if (ps.ind_level == 0)
	   ps.ind_stmt = 0;    /* this is a class A kludge. dont do
				* additional statement indentation if we are
				* at bracket level 0 */

       if (e_lab != s_lab || e_code != s_code)
	   ++code_lines;       /* keep count of lines with code */


       if (e_lab != s_lab) {   /* print lab, if any */
	   if (comment_open) {
	       comment_open = 0;
	       fprintf(output, ".*/\n");
	   }
	   while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
	       e_lab--;
	   cur_col = pad_output(1, compute_label_target());
	   fprintf(output, "%.*s", e_lab - s_lab, s_lab);
	   cur_col = count_spaces(cur_col, s_lab);
       }
       else
	   cur_col = 1;        /* there is no label section */

       ps.pcase = false;

       if (s_code != e_code) { /* print code section, if any */
	   register char *p;

	   if (comment_open) {
	       comment_open = 0;
	       fprintf(output, ".*/\n");
	   }
	   target_col = compute_code_target();
	   {
	       register    i;

	       for (i = 0; i < ps.p_l_follow; i++)
		   if (ps.paren_indents[i] >= 0)
		       ps.paren_indents[i] = -(ps.paren_indents[i] + target_col);
	   }
	   cur_col = pad_output(cur_col, target_col);
	   for (p = s_code; p < e_code; p++)
	       if (*p == (char) 0200)
		   fprintf(output, "%d", target_col * 7);
	       else
		   putc(*p, output);
	   cur_col = count_spaces(cur_col, s_code);
       }
       if (s_com != e_com)
	   if (troff) {
	       int	   all_here = 0;
	       register char *p;

	       if (e_com[-1] == '/' && e_com[-2] == '*')
		   e_com -= 2, all_here++;
	       while (e_com > s_com && e_com[-1] == ' ')
		   e_com--;
	       *e_com = 0;
	       p = s_com;
	       while (*p == ' ')
		   p++;
	       if (p[0] == '/' && p[1] == '*')
		   p += 2, all_here++;
	       else if (p[0] == '*')
		   p += p[1] == '/' ? 2 : 1;
	       while (*p == ' ')
		   p++;
	       if (*p == 0)
		   goto inhibit_newline;
	       if (comment_open < 2 && ps.box_com) {
		   comment_open = 0;
		   fprintf(output, ".*/\n");
	       }
	       if (comment_open == 0) {
		   if ('a' <= *p && *p <= 'z')
		       *p = *p + 'A' - 'a';
		   if (e_com - p < 50 && all_here == 2) {
		       register char *follow = p;
		       fprintf(output, "\n.nr C! \\w\1");
		       while (follow < e_com) {
			   switch (*follow) {
			   case '\n':
			       putc(' ', output);
			   case 1:
			       break;
			   case '\\':
			       putc('\\', output);
			   default:
			       putc(*follow, output);
			   }
			   follow++;
		       }
		       putc(1, output);
		   }
		   fprintf(output, "\n./* %dp %d %dp\n",
			   ps.com_col * 7,
			   (s_code != e_code || s_lab != e_lab) - ps.box_com,
			   target_col * 7);
	       }
	       comment_open = 1 + ps.box_com;
	       while (*p) {
		   if (*p == BACKSLASH)
		       putc(BACKSLASH, output);
		   putc(*p++, output);
	       }
	   }
	   else {	       /* print comment, if any */
	       register    target = ps.com_col;
	       register char *com_st = s_com;

	       target += ps.comment_delta;
	       while (*com_st == '\t')
		   com_st++, target += 8;      /* ? */
	       while (target <= 0)
		   if (*com_st == ' ')
		       target++, com_st++;
		   else if (*com_st == '\t')
		       target = ((target - 1) & ~7) + 9, com_st++;
		   else
		       target = 1;
	       if (cur_col > target) { /* if comment cant fit on this line,
					* put it on next line */
		   putc('\n', output);
		   cur_col = 1;
		   ++ps.out_lines;
	       }
	       while (e_com > com_st && isspace(e_com[-1]))
		   e_com--;
	       cur_col = pad_output(cur_col, target);
	       if (!ps.box_com) {
		   if (star_comment_cont && (com_st[1] != '*' || e_com <= com_st + 1))
		       if (com_st[1] == ' ' && com_st[0] == ' ' && e_com > com_st + 1)
			   com_st[1] = '*';
		       else
			   fwrite(" * ", com_st[0] == '\t' ? 2 : com_st[0] == '*' ? 1 : 3, 1, output);
	       }
	       fwrite(com_st, e_com - com_st, 1, output);
	       ps.comment_delta = ps.n_comment_delta;
	       cur_col = count_spaces(cur_col, com_st);
	       ++ps.com_lines; /* count lines with comments */
	   }
       if (ps.use_ff)
	   putc('\014', output);
       else
	   putc('\n', output);
inhibit_newline:
       ++ps.out_lines;
       if (ps.just_saw_decl == 1 && blanklines_after_declarations) {
	   prefix_blankline_requested = 1;
	   ps.just_saw_decl = 0;
       }
       else
	   prefix_blankline_requested = postfix_blankline_requested;
       postfix_blankline_requested = 0;
    }
    ps.decl_on_line = ps.in_decl;      /* if we are in the middle of a
					* declaration, remember that fact for
					* proper comment indentation */
    ps.ind_stmt = ps.in_stmt & ~ps.in_decl;    /* next line should be
						* indented if we have not
						* completed this stmt and if
						* we are not in the middle of
						* a declaration */
    ps.use_ff = false;
    ps.dumped_decl_indent = 0;
    *(e_lab = s_lab) = '\0';   /* reset buffers */
    *(e_code = s_code) = '\0';
    *(e_com = s_com) = '\0';
    ps.ind_level = ps.i_l_follow;
    ps.paren_level = ps.p_l_follow;
    paren_target = -ps.paren_indents[ps.paren_level - 1];
    not_first_line = 1;
    return;
}

compute_code_target()
{
    register	target_col = ps.ind_size * ps.ind_level + 1;

    if (ps.paren_level)
       if (!lineup_to_parens)
	   target_col += continuation_indent * ps.paren_level;
       else {
	   register    w;
	   register    t = paren_target;

	   if ((w = count_spaces(t, s_code) - max_col) > 0
		   && count_spaces(target_col, s_code) <= max_col) {
	       t -= w + 1;
	       if (t > target_col)
		   target_col = t;
	   }
	   else
	       target_col = t;
       }
    else if (ps.ind_stmt)
       target_col += continuation_indent;
    return target_col;
}

compute_label_target()
{
    return
       ps.pcase ? (int) (case_ind * ps.ind_size) + 1
       : *s_lab == '#' ? 1
       : ps.ind_size * (ps.ind_level - label_offset) + 1;
}


/*
 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
 *
 * All rights reserved
 *
 *
 * NAME: fill_buffer
 *
 * FUNCTION: Reads one block of input into input_buffer
 *
 * HISTORY: initial coding     November 1976   D A Willcox of CAC 1/7/77 A
 * Willcox of CAC      Added check for switch back to partly full input
 * buffer from temporary buffer
 *
 */
int
fill_buffer()
{			       /* this routine reads stuff from the input */
    register char *p;
    register int i;
    register FILE *f = input;

    if (bp_save != 0) { 	       /* there is a partly filled input buffer left */
       buf_ptr = bp_save;      /* dont read anything, just switch buffers */
       buf_end = be_save;
       bp_save = be_save = 0;
       if (buf_ptr < buf_end)
	   return;	       /* only return if there is really something in
				* this buffer */
    }
    for (p = buf_ptr = in_buffer;;) {
       if ((i = getc(f)) == EOF) {
	       *p++ = ' ';
	       *p++ = '\n';
	       had_eof = true;
	       break;
       }
       *p++ = i;
       if (i == '\n')
	       break;
    }
    buf_end = p;
    if (p[-2] == '/' && p[-3] == '*') {
       if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0)
	   fill_buffer();      /* flush indent error message */
       else {
	   int	       com = 0;

	   p = in_buffer;
	   while (*p == ' ' || *p == '\t')
	       p++;
	   if (*p == '/' && p[1] == '*') {
	       p += 2;
	       while (*p == ' ' || *p == '\t')
		   p++;
	       if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E'
		       && p[4] == 'N' && p[5] == 'T') {
		   p += 6;
		   while (*p == ' ' || *p == '\t')
		       p++;
		   if (*p == '*')
		       com = 1;
		   else if (*p == 'O')
		       if (*++p == 'N')
			   p++, com = 1;
		       else if (*p == 'F' && *++p == 'F')
			   p++, com = 2;
		   while (*p == ' ' || *p == '\t')
		       p++;
		   if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) {
		       if (s_com != e_com || s_lab != e_lab || s_code != e_code)
			   dump_line();
		       if (!(inhibit_formatting = com - 1)) {
			   n_real_blanklines = 0;
			   postfix_blankline_requested = 0;
			   prefix_blankline_requested = 0;
			   suppress_blanklines = 1;
		       }
		   }
	       }
	   }
       }
    }
    if (inhibit_formatting) {
       p = in_buffer;
       do
	   putc(*p, output);
       while (*p++ != '\n');
    }
    return;
}

/*
 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
 *
 * All rights reserved
 *
 *
 * NAME: pad_output
 *
 * FUNCTION: Writes tabs and spaces to move the current column up to the desired
 * position.
 *
 * ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf.
 *
 * PARAMETERS: current	       integer	       The current column target
 * nteger	       The desired column
 *
 * RETURNS: Integer value of the new column.  (If current >= target, no action is
 * taken, and current is returned.
 *
 * GLOBALS: None
 *
 * CALLS: write (sys)
 *
 * CALLED BY: dump_line
 *
 * HISTORY: initial coding     November 1976   D A Willcox of CAC
 *
 */
pad_output(current, target)    /* writes tabs and blanks (if necessary) to
				* get the current output position up to the
				* target column */
    int 	current;       /* the current column value */
    int 	target; 	       /* position we want it at */
{
    register int curr;	       /* internal column pointer */
    register int tcur;

    if (troff)
       fprintf(output, "\\h'|%dp'", (target - 1) * 7);
    else {
       if (current >= target)
	   return (current);   /* line is already long enough */
       curr = current;
       while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) {
	   putc('\t', output);
	   curr = tcur;
       }
       while (curr++ < target)
	   putc(' ', output);  /* pad with final blanks */
    }
    return (target);
}

/*
 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
 *
 * All rights reserved
 *
 *
 * NAME: count_spaces
 *
 * FUNCTION: Find out where printing of a given string will leave the current
 * character position on output.
 *
 * ALGORITHM: Run thru input string and add appropriate values to current
 * position.
 *
 * RETURNS: Integer value of position after printing "buffer" starting in column
 * "current".
 *
 * HISTORY: initial coding     November 1976   D A Willcox of CAC
 *
 */
int
count_spaces(current, buffer)
/*
 * this routine figures out where the character position will be after
 * printing the text in buffer starting at column "current"
 */
    int 	current;
    char       *buffer;
{
    register char *buf; 	       /* used to look thru buffer */
    register int cur;	       /* current character counter */

    cur = current;

    for (buf = buffer; *buf != '\0'; ++buf) {
       switch (*buf) {

       case '\n':
       case 014:	       /* form feed */
	   cur = 1;
	   break;

       case '\t':
	   cur = ((cur - 1) & tabmask) + tabsize + 1;
	   break;

       case '':               /* this is a backspace */
	   --cur;
	   break;

       default:
	   ++cur;
	   break;
       }		       /* end of switch */
    }			       /* end of for loop */
    return (cur);
}

int    found_err;
diag(level, msg, a, b)
char *msg;
{
    if (level)
       found_err = 1;
    if (output == stdout) {
       fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
       fprintf(stdout, msg, a, b);
       fprintf(stdout, " */\n");
    }
    else {
       fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
       fprintf(stderr, msg, a, b);
       fprintf(stderr, "\n");
    }
}

writefdef(f, nm)
    register struct fstate *f;
{
    fprintf(output, ".ds f%c %s\n.nr s%c %d\n",
	   nm, f->font, nm, f->size);
}

char	   *
chfont(of, nf, s)
    register struct fstate *of,
	       *nf;
    char       *s;
{
    if (of->font[0] != nf->font[0]
	   || of->font[1] != nf->font[1]) {
       *s++ = '\\';
       *s++ = 'f';
       if (nf->font[1]) {
	   *s++ = '(';
	   *s++ = nf->font[0];
	   *s++ = nf->font[1];
       }
       else
	   *s++ = nf->font[0];
    }
    if (nf->size != of->size) {
       *s++ = '\\';
       *s++ = 's';
       if (nf->size < of->size) {
	   *s++ = '-';
	   *s++ = '0' + of->size - nf->size;
       }
       else {
	   *s++ = '+';
	   *s++ = '0' + nf->size - of->size;
       }
    }
    return s;
}


parsefont(f, s0)
    register struct fstate *f;
    char       *s0;
{
    register char *s = s0;
    int 	sizedelta = 0;
    bzero(f, sizeof *f);
    while (*s) {
       if (isdigit(*s))
	   f->size = f->size * 10 + *s - '0';
       else if (isupper(*s))
	   if (f->font[0])
	       f->font[1] = *s;
	   else
	       f->font[0] = *s;
       else if (*s == 'c')
	   f->allcaps = 1;
       else if (*s == '+')
	   sizedelta++;
       else if (*s == '-')
	   sizedelta--;
       else {
	   fprintf(stderr, "indent: bad font specification: %s\n", s0);
	   exit(1);
       }
       s++;
    }
    if (f->font[0] == 0)
       f->font[0] = 'R';
    if (bodyf.size == 0)
       bodyf.size = 11;
    if (f->size == 0)
       f->size = bodyf.size + sizedelta;
    else if (sizedelta > 0)
       f->size += bodyf.size;
    else
       f->size = bodyf.size - f->size;
}