about summary refs log tree commit diff stats
path: root/087file.cc
blob: 804fee86f72adc4cce0b641630e6c444048479f9 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
//: Interacting with the file system.
//:   '$open-file-for-reading' returns a FILE* as a number (ugh)
//:   '$read-from-file' accepts a number, interprets it as a FILE* (double ugh) and reads a character from it
//: Similarly for writing files.
//: These interfaces are ugly and tied to the current (Linux) host Mu happens
//: to be implemented atop. Later layers will wrap them with better, more
//: testable interfaces.
//:
//: Clearly we don't care about performance or any of that so far.
//: todo: reading/writing binary files

:(before "End Primitive Recipe Declarations")
_OPEN_FILE_FOR_READING,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$open-file-for-reading", _OPEN_FILE_FOR_READING);
:(before "End Primitive Recipe Checks")
case _OPEN_FILE_FOR_READING: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$open-file-for-reading' requires exactly one ingredient, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_string(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of '$open-file-for-reading' should be a string, but got '" << to_string(inst.ingredients.at(0)) << "'\n" << end();
    break;
  }
  if (SIZE(inst.products) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$open-file-for-reading' requires exactly one product, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_number(inst.products.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first product of '$open-file-for-reading' should be a number (file handle), but got '" << to_string(inst.products.at(0)) << "'\n" << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case _OPEN_FILE_FOR_READING: {
  string filename = read_mu_string(ingredients.at(0).at(0));
  assert(sizeof(long long int) >= sizeof(FILE*));
  FILE* f = fopen(filename.c_str(), "r");
  long long int result = reinterpret_cast<long long int>(f);
  products.resize(1);
  products.at(0).push_back(static_cast<double>(result));
  break;
}

:(before "End Primitive Recipe Declarations")
_OPEN_FILE_FOR_WRITING,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$open-file-for-writing", _OPEN_FILE_FOR_WRITING);
:(before "End Primitive Recipe Checks")
case _OPEN_FILE_FOR_WRITING: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$open-file-for-writing' requires exactly one ingredient, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_string(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of '$open-file-for-writing' should be a string, but got '" << to_string(inst.ingredients.at(0)) << "'\n" << end();
    break;
  }
  if (SIZE(inst.products) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$open-file-for-writing' requires exactly one product, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_number(inst.products.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first product of '$open-file-for-writing' should be a number (file handle), but got '" << to_string(inst.products.at(0)) << "'\n" << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case _OPEN_FILE_FOR_WRITING: {
  string filename = read_mu_string(ingredients.at(0).at(0));
  assert(sizeof(long long int) >= sizeof(FILE*));
  long long int result = reinterpret_cast<long long int>(fopen(filename.c_str(), "w"));
  products.resize(1);
  products.at(0).push_back(static_cast<double>(result));
  break;
}

:(before "End Primitive Recipe Declarations")
_READ_FROM_FILE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$read-from-file", _READ_FROM_FILE);
:(before "End Primitive Recipe Checks")
case _READ_FROM_FILE: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$read-from-file' requires exactly one ingredient, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_number(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of '$read-from-file' should be a number, but got '" << to_string(inst.ingredients.at(0)) << "'\n" << end();
    break;
  }
  if (SIZE(inst.products) != 2) {
    raise << maybe(get(Recipe, r).name) << "'$read-from-file' requires exactly two products, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_character(inst.products.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first product of '$read-from-file' should be a character, but got '" << to_string(inst.products.at(0)) << "'\n" << end();
    break;
  }
  if (!is_mu_boolean(inst.products.at(1))) {
    raise << maybe(get(Recipe, r).name) << "second product of '$read-from-file' should be a boolean, but got '" << to_string(inst.products.at(1)) << "'\n" << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case _READ_FROM_FILE: {
  long long int x = static_cast<long long int>(ingredients.at(0).at(0));
  FILE* f = reinterpret_cast<FILE*>(x);
  if (f == NULL) {
    raise << maybe(current_recipe_name()) << "can't read from null file in '" << to_string(current_instruction()) << "'\n" << end();
    break;
  }
  products.resize(2);
  if (feof(f)) {
    products.at(0).push_back(0);
    products.at(1).push_back(1);  // eof
    break;
  }
  if (ferror(f)) {
    raise << maybe(current_recipe_name()) << "file in invalid state in '" << to_string(current_instruction()) << "'\n" << end();
    break;
  }
  char c = getc(f);  // todo: unicode
  if (c == EOF) {
    products.at(0).push_back(0);
    products.at(1).push_back(1);  // eof
    break;
  }
  if (ferror(f)) {
    raise << maybe(current_recipe_name()) << "couldn't read from file in '" << to_string(current_instruction()) << "'\n" << end();
    raise << "  errno: " << errno << '\n' << end();
    break;
  }
  products.at(0).push_back(c);
  products.at(1).push_back(0);  // not eof
  break;
}
:(before "End Includes")
#include <cerrno>

:(before "End Primitive Recipe Declarations")
_WRITE_TO_FILE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$write-to-file", _WRITE_TO_FILE);
:(before "End Primitive Recipe Checks")
case _WRITE_TO_FILE: {
  if (SIZE(inst.ingredients) != 2) {
    raise << maybe(get(Recipe, r).name) << "'$write-to-file' requires exactly two ingredients, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_number(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of '$write-to-file' should be a number, but got '" << to_string(inst.ingredients.at(0)) << "'\n" << end();
    break;
  }
  if (!is_mu_character(inst.ingredients.at(1))) {
    raise << maybe(get(Recipe, r).name) << "second ingredient of '$write-to-file' should be a character, but got '" << to_string(inst.ingredients.at(0)) << "'\n" << end();
    break;
  }
  if (!inst.products.empty()) {
    raise << maybe(get(Recipe, r).name) << "'$write-to-file' writes to no products, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case _WRITE_TO_FILE: {
  long long int x = static_cast<long long int>(ingredients.at(0).at(0));
  FILE* f = reinterpret_cast<FILE*>(x);
  if (f == NULL) {
    raise << maybe(current_recipe_name()) << "can't write to null file in '" << to_string(current_instruction()) << "'\n" << end();
    break;
  }
  if (feof(f)) break;
  if (ferror(f)) {
    raise << maybe(current_recipe_name()) << "file in invalid state in '" << to_string(current_instruction()) << "'\n" << end();
    break;
  }
  long long int y = static_cast<long long int>(ingredients.at(1).at(0));
  char c = static_cast<char>(y);
  putc(c, f);  // todo: unicode
  if (ferror(f)) {
    raise << maybe(current_recipe_name()) << "couldn't write to file in '" << to_string(current_instruction()) << "'\n" << end();
    raise << "  errno: " << errno << '\n' << end();
    break;
  }
  break;
}

:(before "End Primitive Recipe Declarations")
_CLOSE_FILE,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "$close-file", _CLOSE_FILE);
:(before "End Primitive Recipe Checks")
case _CLOSE_FILE: {
  if (SIZE(inst.ingredients) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$close-file' requires exactly one ingredient, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (!is_mu_number(inst.ingredients.at(0))) {
    raise << maybe(get(Recipe, r).name) << "first ingredient of '$close-file' should be a number, but got '" << to_string(inst.ingredients.at(0)) << "'\n" << end();
    break;
  }
  if (SIZE(inst.products) != 1) {
    raise << maybe(get(Recipe, r).name) << "'$close-file' requires exactly one product, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  if (inst.products.at(0).name != inst.ingredients.at(0).name) {
    raise << maybe(get(Recipe, r).name) << "'$close-file' requires its product to be the same as its ingredient, but got '" << inst.original_string << "'\n" << end();
    break;
  }
  break;
}
:(before "End Primitive Recipe Implementations")
case _CLOSE_FILE: {
  long long int x = static_cast<long long int>(ingredients.at(0).at(0));
  FILE* f = reinterpret_cast<FILE*>(x);
  fclose(f);
  products.resize(1);
  products.at(0).push_back(0);  // todo: ensure that caller always resets the ingredient
  break;
}