1 | // Python wrapper for FANOS library in cpp/fanos_shared.h
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2 |
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3 | #include <assert.h>
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4 | #include <stdarg.h> // va_list, etc.
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5 | #include <stdio.h> // vfprintf
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6 | #include <stdlib.h>
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7 |
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8 | #include "data_lang/j8.h" // CanOmitQuotes
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9 | #include "data_lang/j8_libc.h"
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10 | #include "data_lang/utf8.h"
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11 |
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12 | #include <Python.h>
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13 |
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14 | #if 0
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15 | // Log messages to stderr.
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16 | static void debug(const char* fmt, ...) {
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17 | va_list args;
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18 | va_start(args, fmt);
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19 | vfprintf(stderr, fmt, args);
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20 | va_end(args);
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21 | fprintf(stderr, "\n");
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22 | }
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23 | #endif
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24 |
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25 | static PyObject *
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26 | func_J8EncodeString(PyObject *self, PyObject *args) {
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27 | j8_buf_t in;
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28 | int j8_fallback;
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29 |
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30 | if (!PyArg_ParseTuple(args, "s#i", &(in.data), &(in.len), &j8_fallback)) {
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31 | return NULL;
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32 | }
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33 |
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34 | j8_buf_t out;
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35 | J8EncodeString(in, &out, j8_fallback);
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36 |
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37 | PyObject *ret = PyString_FromStringAndSize(out.data, out.len);
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38 | return ret;
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39 | }
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40 |
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41 | static PyObject *
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42 | func_ShellEncodeString(PyObject *self, PyObject *args) {
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43 | j8_buf_t in;
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44 | int ysh_fallback;
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45 |
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46 | if (!PyArg_ParseTuple(args, "s#i", &(in.data), &(in.len), &ysh_fallback)) {
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47 | return NULL;
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48 | }
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49 |
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50 | j8_buf_t out;
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51 | ShellEncodeString(in, &out, ysh_fallback);
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52 |
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53 | PyObject *ret = PyString_FromStringAndSize(out.data, out.len);
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54 | return ret;
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55 | }
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56 |
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57 | static PyObject *
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58 | func_PartIsUtf8(PyObject *self, PyObject *args) {
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59 | j8_buf_t in;
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60 | int start;
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61 | int end;
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62 |
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63 | if (!PyArg_ParseTuple(args, "s#ii", &(in.data), &(in.len), &start, &end)) {
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64 | return NULL;
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65 | }
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66 | // Bounds check for safety
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67 | assert(0 <= start);
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68 | assert(end <= in.len);
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69 |
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70 | Utf8Result_t result;
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71 | for (int i = start; i < end;) {
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72 | utf8_decode(in.data + i, &result);
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73 | if (result.error) {
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74 | return PyBool_FromLong(0);
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75 | }
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76 |
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77 | i += result.bytes_read;
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78 | }
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79 |
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80 | return PyBool_FromLong(1);
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81 | }
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82 |
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83 | static PyObject *
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84 | func_Utf8DecodeOne(PyObject *self, PyObject *args) {
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85 | char *string;
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86 | size_t length;
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87 | int start;
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88 |
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89 | if (!PyArg_ParseTuple(args, "s#i", &string, &length, &start)) {
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90 | return NULL;
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91 | }
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92 |
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93 | // Bounds check for safety
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94 | assert(0 <= start && start < length);
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95 |
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96 | Utf8Result_t decode_result;
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97 | utf8_decode(string + start, &decode_result);
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98 | int32_t codepoint_or_error;
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99 | if (decode_result.error) {
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100 | codepoint_or_error = -decode_result.error;
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101 | } else {
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102 | codepoint_or_error = decode_result.codepoint;
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103 | }
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104 |
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105 | PyObject *ret_val = PyTuple_New(2);
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106 | PyTuple_SET_ITEM(ret_val, 0, PyInt_FromLong(codepoint_or_error));
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107 | PyTuple_SET_ITEM(ret_val, 1, PyInt_FromLong(decode_result.bytes_read));
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108 | return ret_val;
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109 | }
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110 |
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111 | static PyObject *
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112 | func_CanOmitQuotes(PyObject *self, PyObject *args) {
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113 | j8_buf_t in;
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114 | if (!PyArg_ParseTuple(args, "s#", &(in.data), &(in.len))) {
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115 | return NULL;
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116 | }
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117 | int result = CanOmitQuotes(in.data, in.len);
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118 | return PyBool_FromLong(result);
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119 | }
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120 |
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121 | static PyMethodDef methods[] = {
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122 | {"J8EncodeString", func_J8EncodeString, METH_VARARGS, ""},
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123 | {"ShellEncodeString", func_ShellEncodeString, METH_VARARGS, ""},
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124 | {"PartIsUtf8", func_PartIsUtf8, METH_VARARGS, ""},
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125 | {"Utf8DecodeOne", func_Utf8DecodeOne, METH_VARARGS, ""},
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126 | {"CanOmitQuotes", func_CanOmitQuotes, METH_VARARGS, ""},
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127 |
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128 | {NULL, NULL},
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129 | };
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130 |
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131 | void initfastfunc(void) {
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132 | Py_InitModule("fastfunc", methods);
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133 | }
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