Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 11 | /* Parser generator main program */ |
| 12 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 13 | /* This expects a filename containing the grammar as argv[1] (UNIX) |
| 14 | or asks the console for such a file name (THINK C). |
| 15 | It writes its output on two files in the current directory: |
| 16 | - "graminit.c" gets the grammar as a bunch of initialized data |
| 17 | - "graminit.h" gets the grammar's non-terminals as #defines. |
| 18 | Error messages and status info during the generation process are |
| 19 | written to stdout, or sometimes to stderr. */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 20 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 21 | /* XXX TO DO: |
| 22 | - check for duplicate definitions of names (instead of fatal err) |
| 23 | */ |
| 24 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 25 | #include "pgenheaders.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 26 | #include "grammar.h" |
| 27 | #include "node.h" |
| 28 | #include "parsetok.h" |
| 29 | #include "pgen.h" |
| 30 | |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 31 | int Py_DebugFlag; |
Guido van Rossum | c095200 | 1998-04-10 19:34:15 +0000 | [diff] [blame] | 32 | int Py_VerboseFlag; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 33 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 34 | /* Forward */ |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 35 | grammar *getgrammar(char *filename); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 36 | #ifdef THINK_C |
Tim Peters | dbd9ba6 | 2000-07-09 03:09:57 +0000 | [diff] [blame] | 37 | int main(int, char **); |
| 38 | char *askfile(void); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 39 | #endif |
| 40 | |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 41 | void |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 42 | Py_Exit(sts) |
Guido van Rossum | f1dc566 | 1993-07-05 10:31:29 +0000 | [diff] [blame] | 43 | int sts; |
| 44 | { |
| 45 | exit(sts); |
| 46 | } |
| 47 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 48 | int |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 49 | main(argc, argv) |
| 50 | int argc; |
| 51 | char **argv; |
| 52 | { |
| 53 | grammar *g; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 54 | FILE *fp; |
| 55 | char *filename; |
| 56 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 57 | #ifdef THINK_C |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 58 | filename = askfile(); |
| 59 | #else |
| 60 | if (argc != 2) { |
| 61 | fprintf(stderr, "usage: %s grammar\n", argv[0]); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 62 | Py_Exit(2); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 63 | } |
| 64 | filename = argv[1]; |
| 65 | #endif |
| 66 | g = getgrammar(filename); |
| 67 | fp = fopen("graminit.c", "w"); |
| 68 | if (fp == NULL) { |
| 69 | perror("graminit.c"); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 70 | Py_Exit(1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 71 | } |
| 72 | printf("Writing graminit.c ...\n"); |
| 73 | printgrammar(g, fp); |
| 74 | fclose(fp); |
| 75 | fp = fopen("graminit.h", "w"); |
| 76 | if (fp == NULL) { |
| 77 | perror("graminit.h"); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 78 | Py_Exit(1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 79 | } |
| 80 | printf("Writing graminit.h ...\n"); |
| 81 | printnonterminals(g, fp); |
| 82 | fclose(fp); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 83 | Py_Exit(0); |
Guido van Rossum | fd8a393 | 1996-12-02 18:27:33 +0000 | [diff] [blame] | 84 | return 0; /* Make gcc -Wall happy */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 85 | } |
| 86 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 87 | grammar * |
| 88 | getgrammar(filename) |
| 89 | char *filename; |
| 90 | { |
| 91 | FILE *fp; |
| 92 | node *n; |
| 93 | grammar *g0, *g; |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 94 | perrdetail err; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 95 | |
| 96 | fp = fopen(filename, "r"); |
| 97 | if (fp == NULL) { |
| 98 | perror(filename); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 99 | Py_Exit(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 100 | } |
| 101 | g0 = meta_grammar(); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 102 | n = PyParser_ParseFile(fp, filename, g0, g0->g_start, |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 103 | (char *)NULL, (char *)NULL, &err); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 104 | fclose(fp); |
| 105 | if (n == NULL) { |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 106 | fprintf(stderr, "Parsing error %d, line %d.\n", |
| 107 | err.error, err.lineno); |
| 108 | if (err.text != NULL) { |
Guido van Rossum | 6da3434 | 2000-06-28 22:00:02 +0000 | [diff] [blame] | 109 | size_t i; |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 110 | fprintf(stderr, "%s", err.text); |
| 111 | i = strlen(err.text); |
| 112 | if (i == 0 || err.text[i-1] != '\n') |
| 113 | fprintf(stderr, "\n"); |
| 114 | for (i = 0; i < err.offset; i++) { |
| 115 | if (err.text[i] == '\t') |
| 116 | putc('\t', stderr); |
| 117 | else |
| 118 | putc(' ', stderr); |
| 119 | } |
| 120 | fprintf(stderr, "^\n"); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 121 | PyMem_DEL(err.text); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 122 | } |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 123 | Py_Exit(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 124 | } |
| 125 | g = pgen(n); |
| 126 | if (g == NULL) { |
| 127 | printf("Bad grammar.\n"); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 128 | Py_Exit(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 129 | } |
| 130 | return g; |
| 131 | } |
| 132 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 133 | #ifdef THINK_C |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 134 | char * |
| 135 | askfile() |
| 136 | { |
| 137 | char buf[256]; |
| 138 | static char name[256]; |
| 139 | printf("Input file name: "); |
| 140 | if (fgets(buf, sizeof buf, stdin) == NULL) { |
| 141 | printf("EOF\n"); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 142 | Py_Exit(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 143 | } |
Guido van Rossum | 706eea8 | 1990-12-20 23:11:02 +0000 | [diff] [blame] | 144 | /* XXX The (unsigned char *) case is needed by THINK C 3.0 */ |
| 145 | if (sscanf(/*(unsigned char *)*/buf, " %s ", name) != 1) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 146 | printf("No file\n"); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 147 | Py_Exit(1); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 148 | } |
| 149 | return name; |
| 150 | } |
| 151 | #endif |
| 152 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 153 | void |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 154 | Py_FatalError(msg) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 155 | char *msg; |
| 156 | { |
| 157 | fprintf(stderr, "pgen: FATAL ERROR: %s\n", msg); |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 158 | Py_Exit(1); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 159 | } |
| 160 | |
Guido van Rossum | 7ebb23c | 1992-03-27 17:31:35 +0000 | [diff] [blame] | 161 | #ifdef macintosh |
| 162 | /* ARGSUSED */ |
| 163 | int |
| 164 | guesstabsize(path) |
| 165 | char *path; |
| 166 | { |
| 167 | return 4; |
| 168 | } |
| 169 | #endif |
| 170 | |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 171 | /* No-nonsense my_readline() for tokenizer.c */ |
| 172 | |
| 173 | char * |
Guido van Rossum | 86bea46 | 1997-04-29 21:03:06 +0000 | [diff] [blame] | 174 | PyOS_Readline(prompt) |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 175 | char *prompt; |
| 176 | { |
Guido van Rossum | 6da3434 | 2000-06-28 22:00:02 +0000 | [diff] [blame] | 177 | size_t n = 1000; |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 178 | char *p = PyMem_MALLOC(n); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 179 | char *q; |
| 180 | if (p == NULL) |
| 181 | return NULL; |
| 182 | fprintf(stderr, "%s", prompt); |
| 183 | q = fgets(p, n, stdin); |
| 184 | if (q == NULL) { |
| 185 | *p = '\0'; |
| 186 | return p; |
| 187 | } |
| 188 | n = strlen(p); |
| 189 | if (n > 0 && p[n-1] != '\n') |
| 190 | p[n-1] = '\n'; |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 191 | return PyMem_REALLOC(p, n+1); |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 192 | } |
Guido van Rossum | 47fbc40 | 1998-08-25 18:12:36 +0000 | [diff] [blame] | 193 | |
| 194 | #ifdef HAVE_STDARG_PROTOTYPES |
| 195 | #include <stdarg.h> |
| 196 | #else |
| 197 | #include <varargs.h> |
| 198 | #endif |
| 199 | |
| 200 | void |
| 201 | #ifdef HAVE_STDARG_PROTOTYPES |
| 202 | PySys_WriteStderr(const char *format, ...) |
| 203 | #else |
| 204 | PySys_WriteStderr(va_alist) |
| 205 | va_dcl |
| 206 | #endif |
| 207 | { |
| 208 | va_list va; |
| 209 | |
| 210 | #ifdef HAVE_STDARG_PROTOTYPES |
| 211 | va_start(va, format); |
| 212 | #else |
| 213 | char *format; |
| 214 | va_start(va); |
| 215 | format = va_arg(va, char *); |
| 216 | #endif |
| 217 | vfprintf(stderr, format, va); |
| 218 | va_end(va); |
| 219 | } |