Power-Programmierung/CD2.mdf/c/tools/formatte/indent3/io.c

C/C++ Source or Header | 1992-08-04 | 13.5 KB | 541 lines

/*
 * Copyright (c) 1980 Regents of the University of California. All rights
 * reserved.  The Berkeley software License Agreement specifies the terms and
 * conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)io.c    5.2 (Berkeley) 8/28/85";
#endif not lint

/*-
 *              Copyright (C) 1976
 *                by the
 *              Board of Trustees
 *                of the
 *            University of Illinois
 *             All rights reserved
 * 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
 *
 */
/*-
 *
 *              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
 *
 */
#include "indent_globs.h"

int ff = '\f';            /* used to write a form feed */
int comment_open;
static paren_target;

void 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 == 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; */
            target += tabsize - (target % tabsize) + 1;
            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('\f', 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
 *
 */
void
  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
 *
 */
int 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;
    int t_target;

    if (troff)
    fprintf(output, "\\h'|%dp'", (target - 1) * 7);
    else {
    if (current >= target)
        return (current);    /* line is already long enough */
#if 0
    curr = current;
    while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) {
        putc('\t', output);
        curr = tcur;
    }
    while (curr++ < target)
        putc(' ', output);    /* pad with final blanks */
#else
    t_target = target - 1;
    current--;
    tcur = t_target - (t_target % tabsize);        /* align it on a tabstop */
    curr = (current - (current % tabsize));
    curr = tcur - curr;
    curr /= tabsize;
    while (curr--)
        putc('\t', output);
    curr = t_target - tcur;
    while (curr--)
        putc(' ', output);
#endif
    }
    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 '\f':        /* form feed */
        cur = 1;
        break;

        case '\t':
#if 0
        cur = ((cur - 1) & tabmask) + tabsize + 1;
#else
        cur += tabsize - (cur % tabsize) + 1;
#endif
        break;

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

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

#ifdef __STDC__
void diag(int level, char *msg,...)
#else
void diag(va_alist)
  va_decl
#endif
{
    va_list mark;
#ifndef __STDC__
    int level;
    int msg;
    char *msg;
    va_start(mark);
    level = va_arg(mark, int);
    msg = va_arg(mark, char *)
#else
    va_start(mark, msg);
#endif

    if (output == stdout) {
    fprintf(stdout, "/**INDENT** %s(%d): ", level == 0 ? "Warning" : "Error", line_no);
    vfprintf(stdout, msg, mark);
    fprintf(stdout, " */\n");
    } else {
    fprintf(stderr, "%s(%d): ", level == 0 ? "Warning" : "Error", line_no);
    vfprintf(stderr, msg, mark);
    fprintf(stderr, "\n");
    }
    va_end(mark);
}