makescan.c

/********************************************
makescan.c
copyright 2009-2016,2024, Thomas E. Dickey
copyright 1991, Michael D. Brennan

This is a source file for mawk, an implementation of
the AWK programming language.

Mawk is distributed without warranty under the terms of
the GNU General Public License, version 2, 1991.
********************************************/

/*
 * $MawkId: makescan.c,v 1.12 2024/08/25 17:17:31 tom Exp $
 */

/* source for makescan.exe which builds the scancode[]
   via:	  makescan.exe > scancode.c
*/

#include <stdio.h>
#include <time.h>

#include <nstd.h>
#include <scancode.h>

char scan_code[256];

static void
scan_init(void)
{
    register char *p;

    memset(scan_code, SC_UNEXPECTED, sizeof(scan_code));
    for (p = &scan_code['0']; p <= &scan_code['9']; p++)
	*p = SC_DIGIT;
    scan_code[0] = 0;
    scan_code[' '] = scan_code['\t'] = scan_code['\f'] = SC_SPACE;
    scan_code['\r'] = scan_code['\013'] = SC_SPACE;

    scan_code[';'] = SC_SEMI_COLON;
    scan_code['\n'] = SC_NL;
    scan_code['{'] = SC_LBRACE;
    scan_code['}'] = SC_RBRACE;
    scan_code['+'] = SC_PLUS;
    scan_code['-'] = SC_MINUS;
    scan_code['*'] = SC_MUL;
    scan_code['/'] = SC_DIV;
    scan_code['%'] = SC_MOD;
    scan_code['^'] = SC_POW;
    scan_code['('] = SC_LPAREN;
    scan_code[')'] = SC_RPAREN;
    scan_code['_'] = SC_IDCHAR;
    scan_code['='] = SC_EQUAL;
    scan_code['#'] = SC_COMMENT;
    scan_code['\"'] = SC_DQUOTE;
    scan_code[','] = SC_COMMA;
    scan_code['!'] = SC_NOT;
    scan_code['<'] = SC_LT;
    scan_code['>'] = SC_GT;
    scan_code['|'] = SC_OR;
    scan_code['&'] = SC_AND;
    scan_code['?'] = SC_QMARK;
    scan_code[':'] = SC_COLON;
    scan_code['['] = SC_LBOX;
    scan_code[']'] = SC_RBOX;
    scan_code['\\'] = SC_ESCAPE;
    scan_code['.'] = SC_DOT;
    scan_code['~'] = SC_MATCH;
    scan_code['$'] = SC_DOLLAR;

    for (p = &scan_code['A']; p <= &scan_code['Z']; p++)
	p[0] = p['a' - 'A'] = SC_IDCHAR;

}

static void
scan_print(void)
{
    time_t now = time((time_t *) 0);
    register char *p = scan_code;
    register int c;		/* column */
    register int r;		/* row */

    printf("/*\n * %cMawkId%c\n * generated by makescan.c\n * date: %s */\n",
	   '$', '$', ctime(&now));
    printf("#include \"scancode.h\"\n");
    printf("/* *INDENT-OFF* */\n");
    printf("char scan_code[256] = {\n");

    for (r = 1; r <= 16; r++) {
	for (c = 1; c <= 16; c++) {
	    printf("%2d", *p++);
	    if (r != 16 || c != 16)
		putchar(',');
	}
	putchar('\n');
    }

    printf("} ;\n");
    printf("/* *INDENT-ON* */\n");
}

int
main(void)
{
    scan_init();
    scan_print();
    return 0;
}