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/*  $NetBSD: mksyntax.c,v 1.23 2000/07/18 19:13:21 cgd Exp $    */

/*-

 * Copyright (c) 1991, 1993

 *  The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Kenneth Almquist.

 *

 * 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 const char copyright[] =

    "@(#) Copyright (c) 1991, 1993\n\

    The Regents of the University of California.  All rights reserved.\n";

#endif /* not lint */

#ifndef lint

#if 0

static char sccsid[] = "@(#)mksyntax.c  8.2 (Berkeley) 5/4/95";

#else

static const char rcsid[] =

    "$NetBSD: mksyntax.c,v 1.23 2000/07/18 19:13:21 cgd Exp $";

#endif

#endif /* not lint */

/*

 * This program creates syntax.h and syntax.c.

 */

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

#include "../parser.h"

struct synclass {

    char *name;

    char *comment;

};

/* Syntax classes */

struct synclass synclass[] = {

    { "CWORD",  "character is nothing special" },

    { "CNL",    "newline character" },

    { "CBACK",  "a backslash character" },

    { "CSQUOTE",    "single quote" },

    { "CDQUOTE",    "double quote" },

    { "CENDQUOTE",  "a terminating quote" },

    { "CBQUOTE",    "backwards single quote" },

    { "CVAR",   "a dollar sign" },

    { "CENDVAR",    "a '}' character" },

    { "CLP",    "a left paren in arithmetic" },

    { "CRP",    "a right paren in arithmetic" },

    { "CEOF",   "end of file" },

    { "CCTL",   "like CWORD, except it must be escaped" },

    { "CSPCL",  "these terminate a word" },

    { NULL,     NULL }

};

/*

 * Syntax classes for is_ functions.  Warning:  if you add new classes

 * you may have to change the definition of the is_in_name macro.

 */

struct synclass is_entry[] = {

    { "ISDIGIT",    "a digit" },

    { "ISUPPER",    "an upper case letter" },

    { "ISLOWER",    "a lower case letter" },

    { "ISUNDER",    "an underscore" },

    { "ISSPECL",    "the name of a special parameter" },

    { NULL,     NULL }

};

static char writer[] = "\

/*\n\

 * This file was generated by the mksyntax program.\n\

 */\n\

\n";

static FILE *cfile;

static FILE *hfile;

static char *syntax[513];

static int base;

static int size;    /* number of values which a char variable can have */

static int nbits;   /* number of bits in a character */

static int digit_contig;/* true if digits are contiguous */

static void filltable(char *);

static void init(void);

static void add(char *, char *);

static void print(char *);

static void output_type_macros(void);

static void digit_convert(void);

int main(int, char **);

int

main(argc, argv)

    int argc;

    char **argv;

{

#ifdef  TARGET_CHAR

    TARGET_CHAR c;

    TARGET_CHAR d;

#else

    char c;

    char d;

#endif

    int sign;

    int i;

    char buf[80];

    int pos;

    static char digit[] = "0123456789";

    /* Create output files */

    if ((cfile = fopen("syntax.c", "w")) == NULL) {

        perror("syntax.c");

        exit(2);

    }

    if ((hfile = fopen("syntax.h", "w")) == NULL) {

        perror("syntax.h");

        exit(2);

    }

    fputs(writer, hfile);

    fputs(writer, cfile);

    /* Determine the characteristics of chars. */

    c = -1;

    if (c <= 0)

        sign = 1;

    else

        sign = 0;

    for (nbits = 1 ; ; nbits++) {

        d = (1 << nbits) - 1;

        if (d == c)

            break;

    }

    printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);

    if (nbits > 9) {

        fputs("Characters can't have more than 9 bits\n", stderr);

        exit(2);

    }

    size = (1 << nbits) + 1;

    base = 1;

    if (sign)

        base += 1 << (nbits - 1);

    digit_contig = 1;

    for (i = 0 ; i < 10 ; i++) {

        if (digit[i] != '0' + i)

            digit_contig = 0;

    }

    fputs("#include <sys/cdefs.h>\n", hfile);

    fputs("#include <ctype.h>\n", hfile);

    /* Generate the #define statements in the header file */

    fputs("/* Syntax classes */\n", hfile);

    for (i = 0 ; synclass[i].name ; i++) {

        sprintf(buf, "#define %s %d", synclass[i].name, i);

        fputs(buf, hfile);

        for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)

            putc('\t', hfile);

        fprintf(hfile, "/* %s */\n", synclass[i].comment);

    }

    putc('\n', hfile);

    fputs("/* Syntax classes for is_ functions */\n", hfile);

    for (i = 0 ; is_entry[i].name ; i++) {

        sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i);

        fputs(buf, hfile);

        for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07)

            putc('\t', hfile);

        fprintf(hfile, "/* %s */\n", is_entry[i].comment);

    }

    putc('\n', hfile);

    fprintf(hfile, "#define SYNBASE %d\n", base);

    fprintf(hfile, "#define PEOF %d\n\n", -base);

    if (sign)

        fprintf(hfile, "#define UPEOF %d\n\n", -base);

    else

        fprintf(hfile, "#define UPEOF ((unsigned char) %d)\n\n", -base);

    putc('\n', hfile);

    fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile);

    fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile);

    fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile);

    fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile);

    putc('\n', hfile);

    output_type_macros();       /* is_digit, etc. */

    putc('\n', hfile);

    /* Generate the syntax tables. */

    fputs("#include \"shell.h\"\n", cfile);

    fputs("#include \"syntax.h\"\n\n", cfile);

    init();

    fputs("/* syntax table used when not in quotes */\n", cfile);

    add("\n", "CNL");

    add("\\", "CBACK");

    add("'", "CSQUOTE");

    add("\"", "CDQUOTE");

    add("`", "CBQUOTE");

    add("$", "CVAR");

    add("}", "CENDVAR");

    add("<>();&| \t", "CSPCL");

    print("basesyntax");

    init();

    fputs("\n/* syntax table used when in double quotes */\n", cfile);

    add("\n", "CNL");

    add("\\", "CBACK");

    add("\"", "CENDQUOTE");

    add("`", "CBQUOTE");

    add("$", "CVAR");

    add("}", "CENDVAR");

    /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */

    add("!*?[=~:/-]", "CCTL");

    print("dqsyntax");

    init();

    fputs("\n/* syntax table used when in single quotes */\n", cfile);

    add("\n", "CNL");

    add("'", "CENDQUOTE");

    /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */

    add("!*?[=~:/-]\\", "CCTL");

    print("sqsyntax");

    init();

    fputs("\n/* syntax table used when in arithmetic */\n", cfile);

    add("\n", "CNL");

    add("\\", "CBACK");

    add("`", "CBQUOTE");

    add("'", "CSQUOTE");

    add("\"", "CDQUOTE");

    add("$", "CVAR");

    add("}", "CENDVAR");

    add("(", "CLP");

    add(")", "CRP");

    print("arisyntax");

    filltable("0");

    fputs("\n/* character classification table */\n", cfile);

    add("0123456789", "ISDIGIT");

    add("abcdefghijklmnopqrstucvwxyz", "ISLOWER");

    add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER");

    add("_", "ISUNDER");

    add("#?$!-*@", "ISSPECL");

    print("is_type");

    if (! digit_contig)

        digit_convert();

    exit(0);

    /* NOTREACHED */

}

/*

 * Clear the syntax table.

 */

static void

filltable(dftval)

    char *dftval;

{

    int i;

    for (i = 0 ; i < size ; i++)

        syntax[i] = dftval;

}

/*

 * Initialize the syntax table with default values.

 */

static void

init()

{

    filltable("CWORD");

    syntax[0] = "CEOF";

#ifdef TARGET_CHAR

    syntax[base + (TARGET_CHAR)CTLESC] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLVAR] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLENDVAR] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLBACKQ] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLBACKQ + (TARGET_CHAR)CTLQUOTE] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLARI] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLENDARI] = "CCTL";

    syntax[base + (TARGET_CHAR)CTLQUOTEMARK] = "CCTL";

#else

    syntax[base + CTLESC] = "CCTL";

    syntax[base + CTLVAR] = "CCTL";

    syntax[base + CTLENDVAR] = "CCTL";

    syntax[base + CTLBACKQ] = "CCTL";

    syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL";

    syntax[base + CTLARI] = "CCTL";

    syntax[base + CTLENDARI] = "CCTL";

    syntax[base + CTLQUOTEMARK] = "CCTL";

#endif /* TARGET_CHAR */

}

/*

 * Add entries to the syntax table.

 */

static void

add(p, type)

    char *p, *type;

{

    while (*p)

        syntax[*p++ + base] = type;

}

/*

 * Output the syntax table.

 */

static void

print(name)

    char *name;

{

    int i;

    int col;

    fprintf(hfile, "extern const char %s[];\n", name);

    fprintf(cfile, "const char %s[%d] = {\n", name, size);

    col = 0;

    for (i = 0 ; i < size ; i++) {

        if (i == 0) {

            fputs("      ", cfile);

        } else if ((i & 03) == 0) {

            fputs(",\n      ", cfile);

            col = 0;

        } else {

            putc(',', cfile);

            while (++col < 9 * (i & 03))

                putc(' ', cfile);

        }

        fputs(syntax[i], cfile);

        col += strlen(syntax[i]);

    }

    fputs("\n};\n", cfile);

}

/*

 * Output character classification macros (e.g. is_digit).  If digits are

 * contiguous, we can test for them quickly.

 */

static char *macro[] = {

    "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)",

    "#define is_alpha(c)\t((c) != UPEOF && ((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))",

    "#define is_name(c)\t((c) != UPEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))",

    "#define is_in_name(c)\t((c) != UPEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))",

    "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))",

    NULL

};

static void

output_type_macros()

{

    char **pp;

    if (digit_contig)

        macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)";

    for (pp = macro ; *pp ; pp++)

        fprintf(hfile, "%s\n", *pp);

    if (digit_contig)

        fputs("#define digit_val(c)\t((c) - '0')\n", hfile);

    else

        fputs("#define digit_val(c)\t(digit_value[c])\n", hfile);

}

/*

 * Output digit conversion table (if digits are not contiguous).

 */

static void

digit_convert()

{

    int maxdigit;

    static char digit[] = "0123456789";

    char *p;

    int i;

    maxdigit = 0;

    for (p = digit ; *p ; p++)

        if (*p > maxdigit)

            maxdigit = *p;

    fputs("extern const char digit_value[];\n", hfile);

    fputs("\n\nconst char digit_value[] = {\n", cfile);

    for (i = 0 ; i <= maxdigit ; i++) {

        for (p = digit ; *p && *p != i ; p++);

        if (*p == '\0')

            p = digit;

        fprintf(cfile, "      %ld,\n", (long)(p - digit));

    }

    fputs("};\n", cfile);

}