/*- * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * Copyright (c) 1997-2005 * Herbert Xu . 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. */ /* * This program creates syntax.h and syntax.c. */ #include #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" }, { "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" }, { "CIGN", "character should be ignored" }, { 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 void filltable(char *); static void init(void); static void add(char *, char *); static void print(char *); static void output_type_macros(void); int main(int, char **); int main(int argc, char **argv) { int i; char buf[80]; int pos; /* 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); fputs("#include \n", hfile); fputs("\n", hfile); fputs("#ifdef CEOF\n", hfile); fputs("#undef CEOF\n", hfile); fputs("#endif\n", hfile); fputs("\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", 130); fprintf(hfile, "#define PEOF %d\n\n", -130); fprintf(hfile, "#define PEOA %d\n\n", -129); 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("$", "CVAR"); add("}", "CENDVAR"); add("<>();&| \t", "CSPCL"); syntax[1] = "CSPCL"; print("basesyntax"); init(); fputs("\n/* syntax table used when in double quotes */\n", cfile); add("\n", "CNL"); add("\\", "CBACK"); add("\"", "CENDQUOTE"); add("`", "CBQUOTE"); add("$", "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("$", "CVAR"); add("}", "CENDVAR"); add("(", "CLP"); add(")", "CRP"); print("arisyntax"); filltable("0"); fputs("\n/* character classification table */\n", cfile); add("0123456789", "ISDIGIT"); add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); add("_", "ISUNDER"); add("#?$!-*@", "ISSPECL"); print("is_type"); exit(0); /* NOTREACHED */ } /* * Clear the syntax table. */ static void filltable(char *dftval) { int i; for (i = 0 ; i < 258; i++) syntax[i] = dftval; } /* * Initialize the syntax table with default values. */ static void init(void) { int ctl; filltable("CWORD"); syntax[0] = "CEOF"; syntax[1] = "CIGN"; for (ctl = CTL_FIRST; ctl <= CTL_LAST; ctl++ ) syntax[130 + ctl] = "CCTL"; } /* * Add entries to the syntax table. */ static void add(char *p, char *type) { while (*p) syntax[(signed char)*p++ + 130] = 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[] = {\n", name); col = 0; for (i = 0 ; i < 258; 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((unsigned)((c) - '0') <= 9)\n", "#define is_alpha(c)\tisalpha((unsigned char)(c))\n", "#define is_name(c)\t((c) == '_' || isalpha((unsigned char)(c)))\n", "#define is_in_name(c)\t((c) == '_' || isalnum((unsigned char)(c)))\n", "#define is_special(c)\t((is_type+SYNBASE)[(signed char)(c)] & (ISSPECL|ISDIGIT))\n", NULL }; static void output_type_macros(void) { char **pp; for (pp = macro ; *pp ; pp++) fputs(*pp, hfile); fputs("#define digit_val(c)\t((c) - '0')\n", hfile); }