BSD 4_4 release

[unix-history] / usr / src / contrib / nvi / nvi / options.c

/*-
* Copyright (c) 1991, 1993
*      The Regents of the University of California.  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.
*/

#ifndef lint
static char sccsid[] = "@(#)options.c   8.1 (Berkeley) 6/9/93";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>

#include <ctype.h>
#include <curses.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "vi.h"
#include "excmd.h"
#include "pathnames.h"

static int               opts_abbcmp __P((const void *, const void *));
static int               opts_cmp __P((const void *, const void *));
static OPTLIST const    *opts_prefix __P((char *));
static int               opts_print __P((SCR *, OPTLIST const *, OPTION *));

static OPTLIST const optlist[] = {
/* O_AUTOINDENT */
       {"autoindent",  NULL,           OPT_0BOOL,      0},
/* O_AUTOPRINT */
       {"autoprint",   NULL,           OPT_1BOOL,      0},
/* O_AUTOWRITE */
       {"autowrite",   NULL,           OPT_0BOOL,      0},
/* O_BEAUTIFY */
       {"beautify",    NULL,           OPT_0BOOL,      0},
/* O_CC */
       {"cc",          NULL,           OPT_STR,        0},
/* O_COLUMNS */
       {"columns",     f_columns,      OPT_NUM,        OPT_NOSAVE},
/* O_COMMENT */
       {"comment",     NULL,           OPT_0BOOL,      0},
/* O_DIGRAPH */
       {"digraph",     NULL,           OPT_0BOOL,      0},
/* O_DIRECTORY */
       {"directory",   NULL,           OPT_STR,        OPT_NOSAVE},
/* O_EDCOMPATIBLE */
       {"edcompatible",NULL,           OPT_0BOOL,      0},
/* O_ERRORBELLS */
       {"errorbells",  NULL,           OPT_0BOOL,      0},
/* O_EXRC */
       {"exrc",        NULL,           OPT_0BOOL,      0},
/* O_EXTENDED */
       {"extended",    NULL,           OPT_0BOOL,      0},
/* O_FLASH */
       {"flash",       f_flash,        OPT_1BOOL,      0},
/* O_IGNORECASE */
       {"ignorecase",  NULL,           OPT_0BOOL,      0},
/* O_KEYTIME */
       {"keytime",     f_keytime,      OPT_NUM,        0},
/* O_LEFTRIGHT */
       {"leftright",   f_leftright,    OPT_0BOOL,      0},
/* O_LINES */
       {"lines",       f_lines,        OPT_NUM,        OPT_NOSAVE},
/* O_LIST */
       {"list",        f_list,         OPT_0BOOL,      0},
/* O_MAGIC */
       {"magic",       NULL,           OPT_1BOOL,      0},
/* O_MAKE */
       {"make",        NULL,           OPT_STR,        0},
/* O_MESG */
       {"mesg",        f_mesg,         OPT_1BOOL,      0},
/* O_MODELINES */
       {"modelines",   f_modelines,    OPT_0BOOL,      0},
/* O_NUMBER */
       {"number",      f_number,       OPT_0BOOL,      0},
/* O_NUNDO */
       {"nundo",       NULL,           OPT_0BOOL,      0},
/* O_OPTIMIZE */
       {"optimize",    NULL,           OPT_1BOOL,      0},
/* O_PARAGRAPHS */
       {"paragraphs",  f_paragraph,    OPT_STR,        0},
/* O_PROMPT */
       {"prompt",      NULL,           OPT_1BOOL,      0},
/* O_READONLY */
       {"readonly",    f_readonly,     OPT_0BOOL,      0},
/* O_REDRAW */
       {"redraw",      NULL,           OPT_0BOOL,      0},
/* O_REMAP */
       {"remap",       NULL,           OPT_1BOOL,      0},
/* O_REPORT */
       {"report",      NULL,           OPT_NUM,        0},
/* O_RULER */
       {"ruler",       f_ruler,        OPT_0BOOL,      0},
/* O_SCROLL */
       {"scroll",      NULL,           OPT_NUM,        0},
/* O_SECTIONS */
       {"sections",    f_section,      OPT_STR,        0},
/* O_SHELL */
       {"shell",       NULL,           OPT_STR,        0},
/* O_SHIFTWIDTH */
       {"shiftwidth",  f_shiftwidth,   OPT_NUM,        0},
/* O_SHOWMATCH */
       {"showmatch",   NULL,           OPT_0BOOL,      0},
/* O_SHOWMODE */
       {"showmode",    NULL,           OPT_0BOOL,      0},
/* O_SIDESCROLL */
       {"sidescroll",  f_sidescroll,   OPT_NUM,        0},
/* O_TABSTOP */
       {"tabstop",     f_tabstop,      OPT_NUM,        0},
/* O_TAGLENGTH */
       {"taglength",   NULL,           OPT_NUM,        0},
/* O_TAGS */
       {"tags",        f_tags,         OPT_STR,        0},
/* O_TERM */
       {"term",        f_term,         OPT_STR,        OPT_NOSAVE},
/* O_TERSE */
       {"terse",       NULL,           OPT_0BOOL,      0},
/* O_TIMEOUT */
       {"timeout",     NULL,           OPT_0BOOL,      0},
/* O_VERBOSE */
       {"verbose",     NULL,           OPT_0BOOL,      0},
/* O_WARN */
       {"warn",        NULL,           OPT_1BOOL,      0},
/* O_WRAPMARGIN */
       {"wrapmargin",  f_wrapmargin,   OPT_NUM,        0},
/* O_WRAPSCAN */
       {"wrapscan",    NULL,           OPT_1BOOL,      0},
/* O_WRITEANY */
       {"writeany",    NULL,           OPT_0BOOL,      0},
       {NULL},
};

typedef struct abbrev {
       char *name;
       int offset;
} OABBREV;

static OABBREV const abbrev[] = {
       {"ai",          O_AUTOINDENT},
       {"ap",          O_AUTOPRINT},
       {"aw",          O_AUTOWRITE},
       {"bf",          O_BEAUTIFY},
       {"cc",          O_CC},
       {"co",          O_COLUMNS},
       {"dig",         O_DIGRAPH},
       {"dir",         O_DIRECTORY},
       {"eb",          O_ERRORBELLS},
       {"ed",          O_EDCOMPATIBLE},
       {"fl",          O_FLASH},
       {"ic",          O_IGNORECASE},
       {"kt",          O_KEYTIME},
       {"li",          O_LIST},
       {"ls",          O_LINES},
       {"ma",          O_MAGIC},
       {"me",          O_MESG},
       {"mk",          O_MAKE},
       {"modeline",    O_MODELINES},
       {"nu",          O_NUMBER},
       {"opt",         O_OPTIMIZE},
       {"pa",          O_PARAGRAPHS},
       {"pr",          O_PROMPT},
       {"re",          O_REPORT},
       {"ro",          O_READONLY},
       {"ru",          O_RULER},
       {"sc",          O_SCROLL},
       {"se",          O_SECTIONS},
       {"sh",          O_SHELL},
       {"sm",          O_SHOWMATCH},
       {"ss",          O_SIDESCROLL},
       {"sw",          O_SHIFTWIDTH},
       {"te",          O_TERM},
       {"to",          O_KEYTIME},
       {"tr",          O_TERSE},
       {"ts",          O_TABSTOP},
       {"ve",          O_VERBOSE},
       {"wa",          O_WARN},
       {"wm",          O_WRAPMARGIN},
       {"wr",          O_WRITEANY},
       {"ws",          O_WRAPSCAN},
       {NULL},
};

/*
* opts_init --
*      Initialize some of the options.  Since the user isn't really
*      "setting" these variables, don't set their OPT_SET bits.
*/
int
opts_init(sp)
       SCR *sp;
{
       OPTLIST const *op;
       int cnt;
       char *s, *argv[2], b1[1024];

       argv[0] = b1;
       argv[1] = NULL;

#define SET_DEF(opt, str) {                                             \
       if (str != b1)          /* GCC puts strings in text-space. */   \
               (void)strcpy(b1, str);                                  \
       if (opts_set(sp, argv)) {                                       \
               msgq(sp, M_ERR,                                         \
                   "Unable to set default %s option", optlist[opt]);   \
               return (1);                                             \
       }                                                               \
       F_CLR(&sp->opts[opt], OPT_SET);                                 \
}
       /* Set default values. */
       for (op = optlist, cnt = 0; op->name != NULL; ++op, ++cnt)
               if (op->type == OPT_0BOOL)
                       O_CLR(sp, cnt);
               else if (op->type == OPT_1BOOL)
                       O_SET(sp, cnt);
                       
       SET_DEF(O_CC, "cc=cc -c");
       (void)snprintf(b1, sizeof(b1), "directory=%s", _PATH_TMP);
       SET_DEF(O_DIRECTORY, b1);
       SET_DEF(O_KEYTIME, "keytime=2");
       SET_DEF(O_MAKE, "make=make");
       SET_DEF(O_REPORT, "report=5");
       SET_DEF(O_PARAGRAPHS, "paragraphs=IPLPPPQPP LIpplpipbp");
       (void)snprintf(b1, sizeof(b1), "scroll=%ld", O_VAL(sp, O_LINES) / 2);
       SET_DEF(O_SCROLL, b1);
       SET_DEF(O_SECTIONS, "sections=NHSHH HUnhsh");
       (void)snprintf(b1, sizeof(b1),
           "shell=%s", (s = getenv("SHELL")) == NULL ? _PATH_BSHELL : s);
       SET_DEF(O_SHELL, b1);
       SET_DEF(O_SHIFTWIDTH, "shiftwidth=8");
       SET_DEF(O_SIDESCROLL, "sidescroll=16");
       SET_DEF(O_TABSTOP, "tabstop=8");
       (void)snprintf(b1, sizeof(b1), "tags=%s", _PATH_TAGS);
       SET_DEF(O_TAGS, b1);
       (void)snprintf(b1, sizeof(b1),
           "term=%s", (s = getenv("TERM")) == NULL ? "unknown" : s);
       SET_DEF(O_TERM, b1);
       SET_DEF(O_WRAPMARGIN, "wrapmargin=0");

       /*
        * By default, the historic vi displayed information about
        * two options, redraw and term.  Term seems sufficient.
        */
       F_SET(&sp->opts[O_TERM], OPT_SET);
       return (0);
}

/*
* opts_set --
*      Change the values of one or more options.
*/
int
opts_set(sp, argv)
       SCR *sp;
       char **argv;
{
       register char *p;
       OABBREV atmp, *ap;
       OPTLIST const *op;
       OPTLIST otmp;
       OPTION *spo;
       u_long value, turnoff;
       int all, ch, offset, rval;
       char *endp, *equals, *name;
       
       for (all = rval = 0; *argv; ++argv) {
               /*
                * The historic vi dumped the options for each occurrence of
                * "all" in the set list.  Puhleeze.
                */
               if (!strcmp(*argv, "all")) {
                       all = 1;
                       continue;
               }
                       
               /* Find equals sign or end of set, skipping backquoted chars. */
               for (p = name = *argv, equals = NULL; ch = *p; ++p)
                       switch(ch) {
                       case '=':
                               equals = p;
                               break;
                       case '\\':
                               /* Historic vi just used the backslash. */
                               if (p[1] == '\0')
                                       break;
                               ++p;
                               break;
                       }

               turnoff = 0;
               op = NULL;
               if (equals)
                       *equals++ = '\0';

               /* Check list of abbreviations. */
               atmp.name = name;
               if ((ap = bsearch(&atmp, abbrev,
                   sizeof(abbrev) / sizeof(OABBREV) - 1,
                   sizeof(OABBREV), opts_abbcmp)) != NULL) {
                       op = optlist + ap->offset;
                       goto found;
               }

               /* Check list of options. */
               otmp.name = name;
               if ((op = bsearch(&otmp, optlist,
                   sizeof(optlist) / sizeof(OPTLIST) - 1,
                   sizeof(OPTLIST), opts_cmp)) != NULL)
                       goto found;

               /* Try the name without any leading "no". */
               if (name[0] == 'n' && name[1] == 'o') {
                       turnoff = 1;
                       name += 2;
               } else
                       goto prefix;

               /* Check list of abbreviations. */
               atmp.name = name;
               if ((ap = bsearch(&atmp, abbrev,
                   sizeof(abbrev) / sizeof(OABBREV) - 1,
                   sizeof(OABBREV), opts_abbcmp)) != NULL) {
                       op = optlist + ap->offset;
                       goto found;
               }

               /* Check list of options. */
               otmp.name = name;
               if ((op = bsearch(&otmp, optlist,
                   sizeof(optlist) / sizeof(OPTLIST) - 1,
                   sizeof(OPTLIST), opts_cmp)) != NULL)
                       goto found;

               /* Check for prefix match. */
prefix:         op = opts_prefix(name);

found:          if (op == NULL) {
                       msgq(sp, M_ERR,
                           "no %s option: 'set all' gives all option values",
                           name);
                       continue;
               }

               /* Find current option values. */
               offset = op - optlist;
               spo = sp->opts + offset;

               /* Set name, value. */
               switch (op->type) {
               case OPT_0BOOL:
               case OPT_1BOOL:
                       if (equals) {
                               msgq(sp, M_ERR,
                                   "set: [no]%s option doesn't take a value",
                                   name);
                               break;
                       }
                       if (op->func != NULL) {
                               if (op->func(sp, spo, NULL, turnoff)) {
                                       rval = 1;
                                       break;
                               }
                       } else if (turnoff)
                               O_CLR(sp, offset);
                       else
                               O_SET(sp, offset);
                       F_SET(&sp->opts[offset], OPT_SET);
                       break;
               case OPT_NUM:
                       if (turnoff) {
                               msgq(sp, M_ERR,
                                   "set: %s option isn't a boolean", name);
                               break;
                       }
                       if (!equals) {
                               msgq(sp, M_ERR,
                                   "set: %s option requires a value", name);
                               break;
                       }
                       value = strtol(equals, &endp, 10);
                       if (*endp && !isspace(*endp)) {
                               msgq(sp, M_ERR,
                                   "set %s: illegal number %s", name, equals);
                               break;
                       }
                       if (op->func != NULL) {
                               if (op->func(sp, spo, equals, value)) {
                                       rval = 1;
                                       break;
                               }
                       } else
                               O_VAL(sp, offset) = value;
                       F_SET(&sp->opts[offset], OPT_SET);
                       break;
               case OPT_STR:
                       if (turnoff) {
                               msgq(sp, M_ERR,
                                   "set: %s option isn't a boolean", name);
                               break;
                       }
                       if (!equals) {
                               msgq(sp, M_ERR,
                                   "set: %s option requires a value", name);
                               break;
                       }
                       if (op->func != NULL) {
                               if (op->func(sp, spo, equals, (u_long)0)) {
                                       rval = 1;
                                       break;
                               }
                       } else {
                               if (F_ISSET(&sp->opts[offset], OPT_ALLOCATED))
                                       free(O_STR(sp, offset));
                               if ((O_STR(sp, offset) =
                                   strdup(equals)) == NULL) {
                                       msgq(sp, M_ERR,
                                           "Error: %s", strerror(errno));
                                       rval = 1;
                                       break;
                               } else
                                       F_SET(&sp->opts[offset], OPT_ALLOCATED);
                       }
                       F_SET(&sp->opts[offset], OPT_SET);
                       break;
               default:
                       abort();
               }
       }
       if (all)
               opts_dump(sp, 1);
       return (rval);
}

/*
* opt_dump --
*      List the current values of selected options.
*/
void
opts_dump(sp, all)
       SCR *sp;
       int all;
{
       OPTLIST const *op;
       int base, b_num, chcnt, cnt, col, colwidth, curlen, endcol, s_num;
       int numcols, numrows, row, tablen, termwidth;
       int b_op[O_OPTIONCOUNT], s_op[O_OPTIONCOUNT];
       char nbuf[20];

       /*
        * Options are output in two groups -- those that fit at least two to
        * a line and those that don't.  We do output on tab boundaries for no
        * particular reason.   First get the set of options to list, keeping
        * track of the length of each.  No error checking, because we know
        * that O_TERM was set so at least one option has the OPT_SET bit on.
        * Termwidth is the tab stop before half of the line in the first loop,
        * and the full line length later on.
        */
       colwidth = -1;
       tablen = O_VAL(sp, O_TABSTOP);
       termwidth = (sp->cols - 1) / 2 & ~(tablen - 1);
       for (b_num = s_num = 0, op = optlist; op->name; ++op) {
               cnt = op - optlist;
               if (!all && !F_ISSET(&sp->opts[cnt], OPT_SET))
                       continue;
               curlen = strlen(op->name);
               switch (op->type) {
               case OPT_0BOOL:
               case OPT_1BOOL:
                       if (!O_ISSET(sp, cnt))
                               curlen += 2;
                       break;
               case OPT_NUM:
                       (void)snprintf(nbuf,
                           sizeof(nbuf), "%ld", O_VAL(sp, cnt));
                       curlen += strlen(nbuf);
                       break;
               case OPT_STR:
                       curlen += strlen(O_STR(sp, cnt)) + 3;
                       break;
               }
               if (curlen < termwidth) {
                       if (colwidth < curlen)
                               colwidth = curlen;
                       s_op[s_num++] = cnt;
               } else
                       b_op[b_num++] = cnt;
       }

       colwidth = (colwidth + tablen) & ~(tablen - 1);
       termwidth = sp->cols - 1;
       numcols = termwidth / colwidth;
       if (s_num > numcols) {
               numrows = s_num / numcols;
               if (s_num % numcols)
                       ++numrows;
       } else
               numrows = 1;

       for (row = 0; row < numrows;) {
               endcol = colwidth;
               for (base = row, chcnt = col = 0; col < numcols; ++col) {
                       chcnt += opts_print(sp,
                           &optlist[s_op[base]], &sp->opts[s_op[base]]);
                       if ((base += numrows) >= s_num)
                               break;
                       while ((cnt =
                           (chcnt + tablen & ~(tablen - 1))) <= endcol) {
                               (void)putc('\t', sp->stdfp);
                               chcnt = cnt;
                       }
                       endcol += colwidth;
               }
               if (++row < numrows || b_num)
                       (void)putc('\n', sp->stdfp);
       }

       for (row = 0; row < b_num;) {
               (void)opts_print(sp, &optlist[b_op[row]], &sp->opts[b_op[row]]);
               if (++row < b_num)
                       (void)putc('\n', sp->stdfp);
       }
       (void)putc('\n', sp->stdfp);
}

/*
* opts_save --
*      Write the current configuration to a file.
*/
int
opts_save(sp, fp)
       SCR *sp;
       FILE *fp;
{
       OPTION *spo;
       OPTLIST const *op;
       int cnt;

       for (spo = sp->opts, op = optlist; op->name; ++op) {
               if (F_ISSET(op, OPT_NOSAVE))
                       continue;
               cnt = op - optlist;
               switch (op->type) {
               case OPT_0BOOL:
               case OPT_1BOOL:
                       if (O_ISSET(sp, cnt))
                               (void)fprintf(fp, "set %s\n", op->name);
                       else
                               (void)fprintf(fp, "set no%s\n", op->name);
                       break;
               case OPT_NUM:
                       (void)fprintf(fp,
                           "set %s=%-3d\n", op->name, O_VAL(sp, cnt));
                       break;
               case OPT_STR:
                       (void)fprintf(fp,
                           "set %s=\"%s\"\n", op->name, O_STR(sp, cnt));
                       break;
               }
               if (ferror(fp)) {
                       msgq(sp, M_ERR, "I/O error: %s", strerror(errno));
                       return (1);
               }
       }
       return (0);
}

/*
* opts_print --
*      Print out an option.
*/
static int
opts_print(sp, op, spo)
       SCR *sp;
       OPTLIST const *op;
       OPTION *spo;
{
       int curlen, offset;

       curlen = 0;
       offset = op - optlist;
       switch (op->type) {
       case OPT_0BOOL:
       case OPT_1BOOL:
               if (!O_ISSET(sp, offset)) {
                       curlen += 2;
                       (void)putc('n', sp->stdfp);
                       (void)putc('o', sp->stdfp);
               }
               curlen += fprintf(sp->stdfp, "%s", op->name);
               break;
       case OPT_NUM:
               curlen += fprintf(sp->stdfp, "%s", op->name);
               curlen += 1;
               (void)putc('=', sp->stdfp);
               curlen += fprintf(sp->stdfp, "%ld", O_VAL(sp, offset));
               break;
       case OPT_STR:
               curlen += fprintf(sp->stdfp, "%s", op->name);
               curlen += 1;
               (void)putc('=', sp->stdfp);
               curlen += 1;
               (void)putc('"', sp->stdfp);
               curlen += fprintf(sp->stdfp, "%s", O_STR(sp, offset));
               curlen += 1;
               (void)putc('"', sp->stdfp);
               break;
       }
       return (curlen);
}

/*
* opts_prefix --
*      Check to see if the name is the prefix of one (and only one)
*      option.  If so, return the option.
*/
static OPTLIST const *
opts_prefix(name)
       char *name;
{
       OPTLIST const *op, *save_op;
       size_t len;

       save_op = NULL;
       len = strlen(name);
       for (op = optlist; op->name != NULL; ++op) {
               if (op->name[0] < name[0])
                       continue;
               if (op->name[0] > name[0])
                       break;
               if (!memcmp(op->name, name, len)) {
                       if (save_op != NULL)
                               return (NULL);
                       save_op = op;
               }
       }
       return (save_op);
}

static int
opts_abbcmp(a, b)
       const void *a, *b;
{
       return(strcmp(((OABBREV *)a)->name, ((OABBREV *)b)->name));
}

static int
opts_cmp(a, b)
       const void *a, *b;
{
       return(strcmp(((OPTLIST *)a)->name, ((OPTLIST *)b)->name));
}