text: /*
   * Copyright (c) 1985 Sun Microsystems, Inc.
   * Copyright (c) 1980, 1993
   *	The Regents of the University of California.  All rights reserved.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #if 0
  #ifndef lint
  static char sccsid[] = "@(#)io.c	8.1 (Berkeley) 6/6/93";
  #endif /* not lint */
  #endif
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: src/usr.bin/indent/io.c,v 1.15 2005/11/13 20:37:25 dwmalone Exp $");
  
  #include <ctype.h>
  #include <err.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include "indent_globs.h"
  #include "indent.h"
  
  int         comment_open;
  static int  paren_target;
  static int pad_output(int current, int target);
  
  void
  dump_line(void)
  {				/* 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 */
      int cur_col,
                  target_col = 1;
      static int  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());
  	    if (s_lab[0] == '#' && (strncmp(s_lab, "#else", 5) == 0
  				    || strncmp(s_lab, "#endif", 6) == 0)) {
  		char *s = s_lab;
  		if (e_lab[-1] == '\n') e_lab--;
  		do putc(*s++, output);
  		while (s < e_lab && 'a' <= *s && *s<='z');
  		while ((*s == ' ' || *s == '\t') && s < e_lab)
  		    s++;
  		if (s < e_lab)
  		    fprintf(output, s[0]=='/' && s[1]=='*' ? "\t%.*s" : "\t/* %.*s */",
  			    (int)(e_lab - s), s);
  	    }
  	    else fprintf(output, "%.*s", (int)(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 */
  	    char *p;
  
  	    if (comment_open) {
  		comment_open = 0;
  		fprintf(output, ".*/\n");
  	    }
  	    target_col = compute_code_target();
  	    {
  		int 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;
  		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) {
  			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 */
  		int target = ps.com_col;
  		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;
  }
  
  int
  compute_code_target(void)
  {
      int target_col = ps.ind_size * ps.ind_level + 1;
  
      if (ps.paren_level)
  	if (!lineup_to_parens)
  	    target_col += continuation_indent
  		* (2 * continuation_indent == ps.ind_size ? 1 : ps.paren_level);
  	else {
  	    int w;
  	    int 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;
  }
  
  int
  compute_label_target(void)
  {
      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
   *
   */
  void
  fill_buffer(void)
  {				/* this routine reads stuff from the input */
      char *p;
      int i;
      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 = in_buffer;;) {
  	if (p >= in_buffer_limit) {
  	    int size = (in_buffer_limit - in_buffer) * 2 + 10;
  	    int offset = p - in_buffer;
  	    in_buffer = realloc(in_buffer, size);
  	    if (in_buffer == NULL)
  		errx(1, "input line too long");
  	    p = in_buffer + offset;
  	    in_buffer_limit = in_buffer + size - 2;
  	}
  	if ((i = getc(f)) == EOF) {
  		*p++ = ' ';
  		*p++ = '\n';
  		had_eof = true;
  		break;
  	}
  	*p++ = i;
  	if (i == '\n')
  		break;
      }
      buf_ptr = in_buffer;
      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');
      }
  }
  
  /*
   * 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
   *
   */
  static int
  pad_output(int current, int target)
  			        /* writes tabs and blanks (if necessary) to
  				 * get the current output position up to the
  				 * target column */
      /* current: the current column value */
      /* target: position we want it at */
  {
      int curr;		/* internal column pointer */
      int tcur;
  
      if (troff)
  	fprintf(output, "\\h'|%dp'", (target - 1) * 7);
      else {
  	if (current >= target)
  	    return (current);	/* line is already long enough */
  	curr = current;
          if (use_tabs) {
              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(int current, char *buffer)
  /*
   * this routine figures out where the character position will be after
   * printing the text in buffer starting at column "current"
   */
  {
      char *buf;		/* used to look thru buffer */
      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 010:		/* backspace */
  	    --cur;
  	    break;
  
  	default:
  	    ++cur;
  	    break;
  	}			/* end of switch */
      }				/* end of for loop */
      return (cur);
  }
  
  void
  diag4(int level, const char *msg, int a, int b)
  {
      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");
      }
  }
  
  void
  diag3(int level, const char *msg, int a)
  {
      if (level)
  	found_err = 1;
      if (output == stdout) {
  	fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
  	fprintf(stdout, msg, a);
  	fprintf(stdout, " */\n");
      }
      else {
  	fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
  	fprintf(stderr, msg, a);
  	fprintf(stderr, "\n");
      }
  }
  
  void
  diag2(int level, const char *msg)
  {
      if (level)
  	found_err = 1;
      if (output == stdout) {
  	fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
  	fprintf(stdout, msg);
  	fprintf(stdout, " */\n");
      }
      else {
  	fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
  	fprintf(stderr, msg);
  	fprintf(stderr, "\n");
      }
  }
  
  void
  writefdef(struct fstate *f, int nm)
  {
      fprintf(output, ".ds f%c %s\n.nr s%c %d\n",
  	    nm, f->font, nm, f->size);
  }
  
  char *
  chfont(struct fstate *of, struct fstate *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;
  }
  
  void
  parsefont(struct fstate *f, const char *s0)
  {
      const 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 {
  	    errx(1, "bad font specification: %s", s0);
  	}
  	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;
  }
  