| 1 | /*
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| 2 | * Fast lexer using re2c.
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| 3 | */
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| 4 |
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| 5 | #include <stdarg.h> // va_list, etc.
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| 6 | #include <stdio.h> // printf
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| 7 |
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| 8 | #include <Python.h>
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| 9 |
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| 10 | #include "_gen/frontend/id_kind.asdl_c.h"
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| 11 | #include "_gen/frontend/types.asdl_c.h" // for lex_mode_e
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| 12 | #include "_gen/frontend/match.re2c.h"
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| 13 |
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| 14 | // TODO: Should this be shared among all extensions?
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| 15 | // Log messages to stderr.
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| 16 | #if 0
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| 17 | static void debug(const char* fmt, ...) {
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| 18 | va_list args;
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| 19 | va_start(args, fmt);
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| 20 | vfprintf(stderr, fmt, args);
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| 21 | va_end(args);
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| 22 | fprintf(stderr, "\n");
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| 23 | }
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| 24 | #endif
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| 25 |
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| 26 | static PyObject *
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| 27 | fastlex_MatchOshToken(PyObject *self, PyObject *args) {
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| 28 | int lex_mode;
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| 29 |
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| 30 | unsigned char* line;
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| 31 | int line_len;
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| 32 |
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| 33 | int start_pos;
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| 34 | if (!PyArg_ParseTuple(args, "is#i",
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| 35 | &lex_mode, &line, &line_len, &start_pos)) {
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| 36 | return NULL;
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| 37 | }
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| 38 |
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| 39 | // Bounds checking. It's OK to be called with a start_pos looking at \0.
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| 40 | // Eol_Tok is inserted everywhere.
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| 41 | if (start_pos > line_len) {
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| 42 | PyErr_Format(PyExc_ValueError,
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| 43 | "Invalid MatchOshToken call (start_pos = %d, line_len = %d)",
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| 44 | start_pos, line_len);
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| 45 | return NULL;
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| 46 | }
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| 47 |
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| 48 | int id;
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| 49 | int end_pos;
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| 50 | MatchOshToken(lex_mode, line, line_len, start_pos, &id, &end_pos);
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| 51 | return Py_BuildValue("(ii)", id, end_pos);
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| 52 | }
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| 53 |
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| 54 | static PyObject *
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| 55 | fastlex_MatchEchoToken(PyObject *self, PyObject *args) {
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| 56 | unsigned char* line;
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| 57 | int line_len;
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| 58 |
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| 59 | int start_pos;
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| 60 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 61 | return NULL;
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| 62 | }
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| 63 |
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| 64 | // Bounds checking.
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| 65 | if (start_pos > line_len) {
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| 66 | PyErr_Format(PyExc_ValueError,
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| 67 | "Invalid MatchEchoToken call (start_pos = %d, line_len = %d)",
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| 68 | start_pos, line_len);
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| 69 | return NULL;
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| 70 | }
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| 71 |
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| 72 | int id;
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| 73 | int end_pos;
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| 74 | MatchEchoToken(line, line_len, start_pos, &id, &end_pos);
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| 75 | return Py_BuildValue("(ii)", id, end_pos);
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| 76 | }
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| 77 |
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| 78 | static PyObject *
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| 79 | fastlex_MatchGlobToken(PyObject *self, PyObject *args) {
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| 80 | unsigned char* line;
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| 81 | int line_len;
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| 82 |
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| 83 | int start_pos;
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| 84 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 85 | return NULL;
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| 86 | }
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| 87 |
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| 88 | // Bounds checking.
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| 89 | if (start_pos > line_len) {
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| 90 | PyErr_Format(PyExc_ValueError,
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| 91 | "Invalid MatchGlobToken call (start_pos = %d, line_len = %d)",
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| 92 | start_pos, line_len);
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| 93 | return NULL;
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| 94 | }
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| 95 |
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| 96 | int id;
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| 97 | int end_pos;
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| 98 | MatchGlobToken(line, line_len, start_pos, &id, &end_pos);
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| 99 | return Py_BuildValue("(ii)", id, end_pos);
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| 100 | }
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| 101 |
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| 102 | static PyObject *
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| 103 | fastlex_MatchPS1Token(PyObject *self, PyObject *args) {
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| 104 | unsigned char* line;
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| 105 | int line_len;
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| 106 |
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| 107 | int start_pos;
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| 108 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 109 | return NULL;
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| 110 | }
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| 111 |
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| 112 | // Bounds checking.
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| 113 | if (start_pos > line_len) {
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| 114 | PyErr_Format(PyExc_ValueError,
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| 115 | "Invalid MatchPS1Token call (start_pos = %d, line_len = %d)",
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| 116 | start_pos, line_len);
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| 117 | return NULL;
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| 118 | }
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| 119 |
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| 120 | int id;
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| 121 | int end_pos;
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| 122 | MatchPS1Token(line, line_len, start_pos, &id, &end_pos);
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| 123 | return Py_BuildValue("(ii)", id, end_pos);
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| 124 | }
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| 125 |
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| 126 | static PyObject *
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| 127 | fastlex_MatchHistoryToken(PyObject *self, PyObject *args) {
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| 128 | unsigned char* line;
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| 129 | int line_len;
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| 130 |
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| 131 | int start_pos;
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| 132 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 133 | return NULL;
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| 134 | }
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| 135 |
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| 136 | // Bounds checking.
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| 137 | if (start_pos > line_len) {
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| 138 | PyErr_Format(PyExc_ValueError,
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| 139 | "Invalid MatchHistoryToken call (start_pos = %d, line_len = %d)",
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| 140 | start_pos, line_len);
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| 141 | return NULL;
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| 142 | }
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| 143 |
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| 144 | int id;
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| 145 | int end_pos;
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| 146 | MatchHistoryToken(line, line_len, start_pos, &id, &end_pos);
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| 147 | return Py_BuildValue("(ii)", id, end_pos);
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| 148 | }
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| 149 |
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| 150 | static PyObject *
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| 151 | fastlex_MatchBraceRangeToken(PyObject *self, PyObject *args) {
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| 152 | unsigned char* line;
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| 153 | int line_len;
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| 154 |
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| 155 | int start_pos;
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| 156 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 157 | return NULL;
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| 158 | }
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| 159 |
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| 160 | // Bounds checking.
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| 161 | if (start_pos > line_len) {
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| 162 | PyErr_Format(PyExc_ValueError,
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| 163 | "Invalid MatchBraceRangeToken call (start_pos = %d, line_len = %d)",
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| 164 | start_pos, line_len);
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| 165 | return NULL;
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| 166 | }
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| 167 |
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| 168 | int id;
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| 169 | int end_pos;
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| 170 | MatchBraceRangeToken(line, line_len, start_pos, &id, &end_pos);
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| 171 | return Py_BuildValue("(ii)", id, end_pos);
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| 172 | }
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| 173 |
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| 174 | static PyObject *
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| 175 | fastlex_MatchJ8Token(PyObject *self, PyObject *args) {
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| 176 | unsigned char* line;
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| 177 | int line_len;
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| 178 |
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| 179 | int start_pos;
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| 180 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 181 | return NULL;
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| 182 | }
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| 183 |
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| 184 | // Bounds checking.
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| 185 | if (start_pos > line_len) {
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| 186 | PyErr_Format(PyExc_ValueError,
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| 187 | "Invalid MatchJ8Token call (start_pos = %d, line_len = %d)",
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| 188 | start_pos, line_len);
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| 189 | return NULL;
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| 190 | }
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| 191 |
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| 192 | int id;
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| 193 | int end_pos;
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| 194 | MatchJ8Token(line, line_len, start_pos, &id, &end_pos);
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| 195 | return Py_BuildValue("(ii)", id, end_pos);
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| 196 | }
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| 197 |
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| 198 | static PyObject *
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| 199 | fastlex_MatchJ8StrToken(PyObject *self, PyObject *args) {
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| 200 | unsigned char* line;
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| 201 | int line_len;
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| 202 |
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| 203 | int start_pos;
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| 204 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 205 | return NULL;
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| 206 | }
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| 207 |
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| 208 | // Bounds checking.
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| 209 | if (start_pos > line_len) {
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| 210 | PyErr_Format(PyExc_ValueError,
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| 211 | "Invalid MatchJ8StrToken call (start_pos = %d, line_len = %d)",
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| 212 | start_pos, line_len);
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| 213 | return NULL;
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| 214 | }
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| 215 |
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| 216 | int id;
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| 217 | int end_pos;
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| 218 | MatchJ8StrToken(line, line_len, start_pos, &id, &end_pos);
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| 219 | return Py_BuildValue("(ii)", id, end_pos);
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| 220 | }
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| 221 |
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| 222 | static PyObject *
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| 223 | fastlex_MatchJsonStrToken(PyObject *self, PyObject *args) {
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| 224 | unsigned char* line;
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| 225 | int line_len;
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| 226 |
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| 227 | int start_pos;
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| 228 | if (!PyArg_ParseTuple(args, "s#i", &line, &line_len, &start_pos)) {
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| 229 | return NULL;
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| 230 | }
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| 231 |
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| 232 | // Bounds checking.
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| 233 | if (start_pos > line_len) {
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| 234 | PyErr_Format(PyExc_ValueError,
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| 235 | "Invalid MatchJsonStrToken call (start_pos = %d, line_len = %d)",
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| 236 | start_pos, line_len);
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| 237 | return NULL;
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| 238 | }
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| 239 |
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| 240 | int id;
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| 241 | int end_pos;
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| 242 | MatchJsonStrToken(line, line_len, start_pos, &id, &end_pos);
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| 243 | return Py_BuildValue("(ii)", id, end_pos);
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| 244 | }
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| 245 |
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| 246 | static PyObject *
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| 247 | fastlex_IsValidVarName(PyObject *self, PyObject *args) {
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| 248 | unsigned char *name;
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| 249 | int len;
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| 250 |
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| 251 | if (!PyArg_ParseTuple(args, "s#", &name, &len)) {
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| 252 | return NULL;
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| 253 | }
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| 254 | return PyBool_FromLong(IsValidVarName(name, len));
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| 255 | }
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| 256 |
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| 257 | static PyObject *
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| 258 | fastlex_ShouldHijack(PyObject *self, PyObject *args) {
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| 259 | unsigned char *name;
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| 260 | int len;
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| 261 |
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| 262 | if (!PyArg_ParseTuple(args, "s#", &name, &len)) {
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| 263 | return NULL;
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| 264 | }
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| 265 | return PyBool_FromLong(ShouldHijack(name, len));
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| 266 | }
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| 267 |
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| 268 | static PyObject *
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| 269 | fastlex_LooksLikeInteger(PyObject *self, PyObject *args) {
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| 270 | unsigned char *name;
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| 271 | int len;
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| 272 |
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| 273 | if (!PyArg_ParseTuple(args, "s#", &name, &len)) {
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| 274 | return NULL;
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| 275 | }
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| 276 | return PyBool_FromLong(LooksLikeInteger(name, len));
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| 277 | }
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| 278 |
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| 279 | static PyObject *
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| 280 | fastlex_LooksLikeFloat(PyObject *self, PyObject *args) {
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| 281 | unsigned char *name;
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| 282 | int len;
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| 283 |
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| 284 | if (!PyArg_ParseTuple(args, "s#", &name, &len)) {
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| 285 | return NULL;
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| 286 | }
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| 287 | return PyBool_FromLong(LooksLikeFloat(name, len));
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| 288 | }
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| 289 |
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| 290 | #ifdef OVM_MAIN
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| 291 | #include "pyext/fastlex.c/methods.def"
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| 292 | #else
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| 293 | static PyMethodDef methods[] = {
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| 294 | {"MatchOshToken", fastlex_MatchOshToken, METH_VARARGS,
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| 295 | "(lexer mode, line, start_pos) -> (id, end_pos)."},
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| 296 | {"MatchEchoToken", fastlex_MatchEchoToken, METH_VARARGS,
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| 297 | "(line, start_pos) -> (id, end_pos)."},
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| 298 | {"MatchGlobToken", fastlex_MatchGlobToken, METH_VARARGS,
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| 299 | "(line, start_pos) -> (id, end_pos)."},
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| 300 | {"MatchPS1Token", fastlex_MatchPS1Token, METH_VARARGS,
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| 301 | "(line, start_pos) -> (id, end_pos)."},
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| 302 | {"MatchHistoryToken", fastlex_MatchHistoryToken, METH_VARARGS,
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| 303 | "(line, start_pos) -> (id, end_pos)."},
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| 304 | {"MatchBraceRangeToken", fastlex_MatchBraceRangeToken, METH_VARARGS,
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| 305 | "(line, start_pos) -> (id, end_pos)."},
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| 306 | {"MatchJ8Token", fastlex_MatchJ8Token, METH_VARARGS,
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| 307 | "(line, start_pos) -> (id, end_pos)."},
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| 308 | {"MatchJ8StrToken", fastlex_MatchJ8StrToken, METH_VARARGS,
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| 309 | "(line, start_pos) -> (id, end_pos)."},
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| 310 | {"MatchJsonStrToken", fastlex_MatchJsonStrToken, METH_VARARGS,
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| 311 | "(line, start_pos) -> (id, end_pos)."},
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| 312 | {"IsValidVarName", fastlex_IsValidVarName, METH_VARARGS,
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| 313 | "Is it a valid var name?"},
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| 314 | // Should we hijack this shebang line?
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| 315 | {"ShouldHijack", fastlex_ShouldHijack, METH_VARARGS, ""},
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| 316 | {"LooksLikeInteger", fastlex_LooksLikeInteger, METH_VARARGS, ""},
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| 317 | {"LooksLikeFloat", fastlex_LooksLikeFloat, METH_VARARGS, ""},
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| 318 | {NULL, NULL},
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| 319 | };
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| 320 | #endif
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| 321 |
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| 322 | void initfastlex(void) {
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| 323 | Py_InitModule("fastlex", methods);
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| 324 | }
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