/* $NetBSD: mksyntax.c,v 1.29 2003/08/07 09:05:35 agc 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. 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 1.29 2003/08/07 09:05:35 agc Exp $"; #endif #endif /* not lint */ /* * This program creates syntax.h and syntax.c. */ #include #include #include #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" }, { "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(int); static void digit_convert(void); int main(int, char **); int main(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 \n", hfile); fputs("#include \n", hfile); /* Generate the #define statements in the header file */ fputs("/* Syntax classes */\n", hfile); for (i = 0 ; synclass[i].name ; i++) { snprintf(buf, sizeof(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++) { snprintf(buf, sizeof(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 ((char)%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(sign); /* 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("\"", "CDQUOTE"); add("`", "CBQUOTE"); add("$", "CVAR"); add("}", "CENDVAR"); /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ add("!*?[=~:/-", "CCTL"); print("dqsyntax"); init(); fputs("\n/* syntax table used when in single quotes */\n", cfile); add("\n", "CNL"); add("'", "CSQUOTE"); /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ add("!*?[=~:/-", "CCTL"); print("sqsyntax"); init(); fputs("\n/* syntax table used when in arithmetic */\n", cfile); add("\n", "CNL"); add("\\", "CBACK"); add("`", "CBQUOTE"); add("'", "CSQUOTE"); add("\"", "CDQUOTE"); add("$", "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(char *dftval) { int i; for (i = 0 ; i < size ; i++) syntax[i] = dftval; } /* * Initialize the syntax table with default values. */ static void init(void) { int ctl; filltable("CWORD"); syntax[0] = "CEOF"; for (ctl = CTL_FIRST; ctl <= CTL_LAST; ctl++ ) #ifdef TARGET_CHAR syntax[base + (TARGET_CHAR)ctl ] = "CCTL"; #else syntax[base + ctl] = "CCTL"; #endif /* TARGET_CHAR */ } /* * Add entries to the syntax table. */ static void add(char *p, char *type) { while (*p) syntax[*p++ + base] = type; } /* * Output the syntax table. */ static void print(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)[(unsigned char)(c)] & ISDIGIT)\n", "#define is_alpha(c)\t(((%s)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && isalpha((unsigned char)(c)))\n", "#define is_name(c)\t(((%s)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalpha((unsigned char)(c))))\n", "#define is_in_name(c)\t(((%s)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalnum((unsigned char)(c))))\n", "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))\n", NULL }; static void output_type_macros(int sign) { char **pp; if (digit_contig) macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)\n"; for (pp = macro ; *pp ; pp++) fprintf(hfile, *pp, sign ? "char" : "unsigned char"); if (digit_contig) fputs("#define digit_val(c)\t((c) - '0')\n", hfile); else fputs("#define digit_val(c)\t(digit_value[(unsigned char)(c)])\n", hfile); } /* * Output digit conversion table (if digits are not contiguous). */ static void digit_convert(void) { 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); }