Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 2 | Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum, |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 3 | Amsterdam, The Netherlands. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI not be used in advertising or publicity pertaining to |
| 13 | distribution of the software without specific, written prior permission. |
| 14 | |
| 15 | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 16 | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 17 | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| 18 | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 21 | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
| 23 | ******************************************************************/ |
| 24 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | /* Parser generator main program */ |
| 26 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 27 | /* This expects a filename containing the grammar as argv[1] (UNIX) |
| 28 | or asks the console for such a file name (THINK C). |
| 29 | It writes its output on two files in the current directory: |
| 30 | - "graminit.c" gets the grammar as a bunch of initialized data |
| 31 | - "graminit.h" gets the grammar's non-terminals as #defines. |
| 32 | Error messages and status info during the generation process are |
| 33 | written to stdout, or sometimes to stderr. */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 34 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 35 | /* XXX TO DO: |
| 36 | - check for duplicate definitions of names (instead of fatal err) |
| 37 | */ |
| 38 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 39 | #include "pgenheaders.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 40 | #include "grammar.h" |
| 41 | #include "node.h" |
| 42 | #include "parsetok.h" |
| 43 | #include "pgen.h" |
| 44 | |
| 45 | int debugging; |
| 46 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 47 | /* Forward */ |
| 48 | grammar *getgrammar PROTO((char *filename)); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 49 | #ifdef THINK_C |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 50 | int main PROTO((int, char **)); |
| 51 | char *askfile PROTO((void)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 52 | #endif |
| 53 | |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 54 | void |
| 55 | goaway(sts) |
| 56 | int sts; |
| 57 | { |
| 58 | exit(sts); |
| 59 | } |
| 60 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 61 | int |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 62 | main(argc, argv) |
| 63 | int argc; |
| 64 | char **argv; |
| 65 | { |
| 66 | grammar *g; |
| 67 | node *n; |
| 68 | FILE *fp; |
| 69 | char *filename; |
| 70 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 71 | #ifdef THINK_C |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 72 | filename = askfile(); |
| 73 | #else |
| 74 | if (argc != 2) { |
| 75 | fprintf(stderr, "usage: %s grammar\n", argv[0]); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 76 | goaway(2); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 77 | } |
| 78 | filename = argv[1]; |
| 79 | #endif |
| 80 | g = getgrammar(filename); |
| 81 | fp = fopen("graminit.c", "w"); |
| 82 | if (fp == NULL) { |
| 83 | perror("graminit.c"); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 84 | goaway(1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 85 | } |
| 86 | printf("Writing graminit.c ...\n"); |
| 87 | printgrammar(g, fp); |
| 88 | fclose(fp); |
| 89 | fp = fopen("graminit.h", "w"); |
| 90 | if (fp == NULL) { |
| 91 | perror("graminit.h"); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 92 | goaway(1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 93 | } |
| 94 | printf("Writing graminit.h ...\n"); |
| 95 | printnonterminals(g, fp); |
| 96 | fclose(fp); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 97 | goaway(0); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 98 | } |
| 99 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 100 | grammar * |
| 101 | getgrammar(filename) |
| 102 | char *filename; |
| 103 | { |
| 104 | FILE *fp; |
| 105 | node *n; |
| 106 | grammar *g0, *g; |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 107 | perrdetail err; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 108 | |
| 109 | fp = fopen(filename, "r"); |
| 110 | if (fp == NULL) { |
| 111 | perror(filename); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 112 | goaway(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 113 | } |
| 114 | g0 = meta_grammar(); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 115 | n = parsefile(fp, filename, g0, g0->g_start, |
| 116 | (char *)NULL, (char *)NULL, &err); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 117 | fclose(fp); |
| 118 | if (n == NULL) { |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 119 | fprintf(stderr, "Parsing error %d, line %d.\n", |
| 120 | err.error, err.lineno); |
| 121 | if (err.text != NULL) { |
| 122 | int i; |
| 123 | fprintf(stderr, "%s", err.text); |
| 124 | i = strlen(err.text); |
| 125 | if (i == 0 || err.text[i-1] != '\n') |
| 126 | fprintf(stderr, "\n"); |
| 127 | for (i = 0; i < err.offset; i++) { |
| 128 | if (err.text[i] == '\t') |
| 129 | putc('\t', stderr); |
| 130 | else |
| 131 | putc(' ', stderr); |
| 132 | } |
| 133 | fprintf(stderr, "^\n"); |
| 134 | free(err.text); |
| 135 | } |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 136 | goaway(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 137 | } |
| 138 | g = pgen(n); |
| 139 | if (g == NULL) { |
| 140 | printf("Bad grammar.\n"); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 141 | goaway(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 142 | } |
| 143 | return g; |
| 144 | } |
| 145 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 146 | #ifdef THINK_C |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 147 | char * |
| 148 | askfile() |
| 149 | { |
| 150 | char buf[256]; |
| 151 | static char name[256]; |
| 152 | printf("Input file name: "); |
| 153 | if (fgets(buf, sizeof buf, stdin) == NULL) { |
| 154 | printf("EOF\n"); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 155 | goaway(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 156 | } |
Guido van Rossum | 706eea8 | 1990-12-20 23:11:02 +0000 | [diff] [blame] | 157 | /* XXX The (unsigned char *) case is needed by THINK C 3.0 */ |
| 158 | if (sscanf(/*(unsigned char *)*/buf, " %s ", name) != 1) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 159 | printf("No file\n"); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 160 | goaway(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 161 | } |
| 162 | return name; |
| 163 | } |
| 164 | #endif |
| 165 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 166 | void |
| 167 | fatal(msg) |
| 168 | char *msg; |
| 169 | { |
| 170 | fprintf(stderr, "pgen: FATAL ERROR: %s\n", msg); |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 171 | goaway(1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 172 | } |
| 173 | |
Guido van Rossum | 7ebb23c | 1992-03-27 17:31:35 +0000 | [diff] [blame] | 174 | #ifdef macintosh |
| 175 | /* ARGSUSED */ |
| 176 | int |
| 177 | guesstabsize(path) |
| 178 | char *path; |
| 179 | { |
| 180 | return 4; |
| 181 | } |
| 182 | #endif |
| 183 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 184 | /* No-nonsense my_readline() for tokenizer.c */ |
| 185 | |
| 186 | char * |
| 187 | my_readline(prompt) |
| 188 | char *prompt; |
| 189 | { |
| 190 | int n = 1000; |
| 191 | char *p = malloc(n); |
| 192 | char *q; |
| 193 | if (p == NULL) |
| 194 | return NULL; |
| 195 | fprintf(stderr, "%s", prompt); |
| 196 | q = fgets(p, n, stdin); |
| 197 | if (q == NULL) { |
| 198 | *p = '\0'; |
| 199 | return p; |
| 200 | } |
| 201 | n = strlen(p); |
| 202 | if (n > 0 && p[n-1] != '\n') |
| 203 | p[n-1] = '\n'; |
| 204 | return realloc(p, n+1); |
| 205 | } |