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[unix-history] / usr / src / usr.bin / indent / io.c
/*
* Copyright (c) 1980 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 and the University
* of Illinois, Urbana. The name of either
* University 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 5.7 (Berkeley) %G%";
#endif /* not lint */
/*
* FILE NAME:
* io.c
* PURPOSE:
* Contains routines to handle i/o related stuff for indent.
* GLOBALS:
* None
* FUNCTIONS:
* dump_line
* fill_buffer
* pad_output
* count_spaces
* eqin
* cmp
*
*/\f
/*-
*
* Copyright (C) 1976
* by the
* Board of Trustees
* of the
* University of Illinois
*
* All rights reserved
*
*
* NAME:
* dump_line
*
* FUNCTION:
* Does the actual printing of the stored up line
*
* ALGORITHM:
* For each of the label, code, and comment sections which are used on
* this line:
*
* 1) Use pad_output to get the section aligned properly.
* 2) write the section
*
* The indentation level used for the code is set by ps.ind_level. After
* printing, ps.ind_level is set to ps.i_l_follow.
*
* An extra level of indentation is added if ps.ind_stmt is 1. After
* printing, ps.ind_stmt is set to 1 iff the line just printed has an
* unterminated, non-declaration statement.
*
* HISTORY:
* initial coding November 1976 D A Willcox of CAC
*
*/\f
#include "indent_globs.h"
int ff = 014; /* used to write a form feed */
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,
temp_col,
target_col;
if (ps.procname[0]) {
if (troff)
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)
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) {
register char *p;
if (e_com[-1] == '/' && e_com[-2] == '*')
e_com -= 2;
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;
else if (p[0] == '*')
p += p[1] == '/' ? 2 : 1;
while (*p == ' ')
p++;
if (*p == 0)
goto inhibit_newline;
if (!comment_open) {
if ('a' <= *p && *p <= 'z')
*p = *p + 'A' - 'a';
if (s_code != e_code || s_lab != e_lab) {
fprintf(output, "\\c\n./* %dp 1 %dp\n",
ps.com_col * 7, target_col * 7);
}
else
fprintf(output, "./* %dp 0 %dp\n",
ps.com_col * 7, target_col * 7);
}
comment_open = 1;
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 (target <= 0)
if (*s_com == ' ')
target++, s_com++;
else if (*s_com == '\t')
target = ((target - 1) & ~7) + 9, s_com++;
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;
}
cur_col = pad_output(cur_col, target);
if (!ps.box_com) {
if (star_comment_cont && com_st[1] != '*')
if (com_st[1] == ' ' && com_st[0] == ' ')
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];
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
*
*/\f
int
fill_buffer()
{ /* this routine reads stuff from the input */
int count;
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 */
}
p = in_buffer;
buf_ptr = p;
while ((*p++ = i = getc(f)) != EOF && i != '\n');
if (i == EOF) {
p[-1] = ' ';
*p++ = '\n';
had_eof = true;
}
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
*
*/\f
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
*
*/\f
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 '\b': /* 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)
{
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");
}
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.