6f47734fd7
multiple times when performing nested variable expansion, and preserve some quoting information in order to avoid removing apparently empty expansion result.
404 lines
10 KiB
C
404 lines
10 KiB
C
/*-
|
|
* 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 char const 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";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$Id: mksyntax.c,v 1.11 1998/05/18 06:44:03 charnier Exp $";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* This program creates syntax.h and syntax.c.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.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 __P((char *));
|
|
static void init __P((void));
|
|
static void add __P((char *, char *));
|
|
static void print __P((char *));
|
|
static void output_type_macros __P((void));
|
|
static void digit_convert __P((void));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc __unused;
|
|
char **argv __unused;
|
|
{
|
|
char c;
|
|
char d;
|
|
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;
|
|
}
|
|
#if 0
|
|
printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits);
|
|
#endif
|
|
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);
|
|
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);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* 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";
|
|
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";
|
|
}
|
|
|
|
|
|
/*
|
|
* 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) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))",
|
|
"#define is_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))",
|
|
"#define is_in_name(c)\t((c) != PEOF && ((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, " %d,\n", p - digit);
|
|
}
|
|
fputs("};\n", cfile);
|
|
}
|