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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
//: Clean syntax to manipulate and check the file system in scenarios.
//: Instructions 'assume-filesystem' and 'filesystem-should-contain' implicitly create
//: a variable called 'filesystem' that is accessible to later instructions in
//: the scenario. 'filesystem-should-contain' can check unicode characters in
//: the fake filesystem
:(scenarios run_mu_scenario)
:(scenario simple_filesystem)
scenario assume-filesystem [
local-scope
assume-filesystem [
# file 'a' containing two lines of data
[a] <- [
|a bc|
|de f|
]
# directory 'b' containing two files, 'c' and 'd'
[b/c] <- []
[b/d] <- [
|xyz|
]
]
data:address:array:file-mapping <- get *filesystem:address:filesystem, data:offset
file1:file-mapping <- index *data, 0
file1-name:text <- get file1, name:offset
10:array:char/raw <- copy *file1-name
file1-contents:text <- get file1, contents:offset
100:array:char/raw <- copy *file1-contents
file2:file-mapping <- index *data, 1
file2-name:text <- get file2, name:offset
30:array:char/raw <- copy *file2-name
file2-contents:text <- get file2, contents:offset
40:array:char/raw <- copy *file2-contents
file3:file-mapping <- index *data, 2
file3-name:text <- get file3, name:offset
50:array:char/raw <- copy *file3-name
file3-contents:text <- get file3, contents:offset
60:array:char/raw <- copy *file3-contents
memory-should-contain [
10:array:character <- [a]
100:array:character <- [a bc
de f
]
30:array:character <- [b/c]
40:array:character <- []
50:array:character <- [b/d]
60:array:character <- [xyz
]
]
]
:(scenario escaping_file_contents)
scenario assume-filesystem [
local-scope
assume-filesystem [
# file 'a' containing a '|'
# need to escape '\' once for each block
[a] <- [
|x\\\\|yz|
]
]
data:address:array:file-mapping <- get *filesystem:address:filesystem, data:offset
file1:file-mapping <- index *data, 0
file1-name:text <- get file1, name:offset
10:array:char/raw <- copy *file1-name
file1-contents:text <- get file1, contents:offset
20:array:char/raw <- copy *file1-contents
memory-should-contain [
10:array:character <- [a]
20:array:character <- [x|yz
]
]
]
:(before "End Globals")
extern const int FILESYSTEM = Next_predefined_global_for_scenarios++;
//: give 'filesystem' a fixed location in scenarios
:(before "End Special Scenario Variable Names(r)")
Name[r]["filesystem"] = FILESYSTEM;
//: make 'filesystem' always a raw location in scenarios
:(before "End is_special_name Cases")
if (s == "filesystem") return true;
:(before "End initialize_transform_rewrite_literal_string_to_text()")
recipes_taking_literal_strings.insert("assume-filesystem");
//: screen-should-contain is a regular instruction
:(before "End Primitive Recipe Declarations")
ASSUME_FILESYSTEM,
:(before "End Primitive Recipe Numbers")
put(Recipe_ordinal, "assume-filesystem", ASSUME_FILESYSTEM);
:(before "End Primitive Recipe Checks")
case ASSUME_FILESYSTEM: {
break;
}
:(before "End Primitive Recipe Implementations")
case ASSUME_FILESYSTEM: {
assert(scalar(ingredients.at(0)));
assume_filesystem(current_instruction().ingredients.at(0).name, current_recipe_name());
break;
}
:(code)
void assume_filesystem(const string& data, const string& caller) {
map<string, string> contents;
parse_filesystem(data, contents, caller);
construct_filesystem_object(contents);
}
void parse_filesystem(const string& data, map<string, string>& out, const string& caller) {
istringstream in(data);
in >> std::noskipws;
while (true) {
if (!has_data(in)) break;
skip_whitespace_and_comments(in);
if (!has_data(in)) break;
string filename = next_filesystem_word(in);
if (*filename.begin() != '[') {
raise << caller << ": assume-filesystem: filename '" << filename << "' must begin with a '['\n" << end();
break;
}
if (*filename.rbegin() != ']') {
raise << caller << ": assume-filesystem: filename '" << filename << "' must end with a ']'\n" << end();
break;
}
filename.erase(0, 1);
filename.erase(SIZE(filename)-1);
if (!has_data(in)) {
raise << caller << ": assume-filesystem: no data for filename '" << filename << "'\n" << end();
break;
}
string arrow = next_filesystem_word(in);
if (arrow != "<-") {
raise << caller << ": assume-filesystem: expected '<-' after filename '" << filename << "' but got '" << arrow << "'\n" << end();
break;
}
if (!has_data(in)) {
raise << caller << ": assume-filesystem: no data for filename '" << filename << "' after '<-'\n" << end();
break;
}
string contents = next_filesystem_word(in);
if (*contents.begin() != '[') {
raise << caller << ": assume-filesystem: file contents '" << contents << "' for filename '" << filename << "' must begin with a '['\n" << end();
break;
}
if (*contents.rbegin() != ']') {
raise << caller << ": assume-filesystem: file contents '" << contents << "' for filename '" << filename << "' must end with a ']'\n" << end();
break;
}
contents.erase(0, 1);
contents.erase(SIZE(contents)-1);
put(out, filename, munge_filesystem_contents(contents, filename, caller));
}
}
string munge_filesystem_contents(const string& data, const string& filename, const string& caller) {
if (data.empty()) return "";
istringstream in(data);
in >> std::noskipws;
skip_whitespace_and_comments(in);
ostringstream out;
while (true) {
if (!has_data(in)) break;
skip_whitespace(in);
if (!has_data(in)) break;
if (in.peek() != '|') {
raise << caller << ": assume-filesystem: file contents for filename '" << filename << "' must be delimited in '|'s\n" << end();
break;
}
in.get(); // skip leading '|'
string line;
getline(in, line);
for (int i = 0; i < SIZE(line); ++i) {
if (line.at(i) == '|') break;
if (line.at(i) == '\\') {
++i; // skip
if (i == SIZE(line)) {
raise << caller << ": assume-filesystem: file contents can't end a line with '\\'\n" << end();
break;
}
}
out << line.at(i);
}
// todo: some way to represent a file without a final newline
out << '\n';
}
return out.str();
}
void construct_filesystem_object(const map<string, string>& contents) {
int filesystem_data_address = allocate(SIZE(contents)*2 + /*array length*/1);
int curr = filesystem_data_address + /*skip refcount and length*/2;
for (map<string, string>::const_iterator p = contents.begin(); p != contents.end(); ++p) {
put(Memory, curr, new_mu_text(p->first));
trace(9999, "mem") << "storing file name " << get(Memory, curr) << " in location " << curr << end();
put(Memory, get(Memory, curr), 1);
trace(9999, "mem") << "storing refcount 1 in location " << get(Memory, curr) << end();
++curr;
put(Memory, curr, new_mu_text(p->second));
trace(9999, "mem") << "storing file contents " << get(Memory, curr) << " in location " << curr << end();
put(Memory, get(Memory, curr), 1);
trace(9999, "mem") << "storing refcount 1 in location " << get(Memory, curr) << end();
++curr;
}
curr = filesystem_data_address+/*skip refcount*/1;
put(Memory, curr, SIZE(contents)); // size of array
trace(9999, "mem") << "storing filesystem size " << get(Memory, curr) << " in location " << curr << end();
put(Memory, filesystem_data_address, 1); // initialize refcount
trace(9999, "mem") << "storing refcount 1 in location " << filesystem_data_address << end();
// wrap the filesystem data in a filesystem object
int filesystem_address = allocate(size_of_filesystem());
curr = filesystem_address+/*skip refcount*/1;
put(Memory, curr, filesystem_data_address);
trace(9999, "mem") << "storing filesystem data address " << filesystem_data_address << " in location " << curr << end();
put(Memory, filesystem_address, 1); // initialize refcount
trace(9999, "mem") << "storing refcount 1 in location " << filesystem_address << end();
// save in product
put(Memory, FILESYSTEM, filesystem_address);
trace(9999, "mem") << "storing filesystem address " << filesystem_address << " in location " << FILESYSTEM << end();
}
int size_of_filesystem() {
// memoize result if already computed
static int result = 0;
if (result) return result;
assert(get(Type_ordinal, "filesystem"));
type_tree* type = new type_tree("filesystem");
result = size_of(type)+/*refcount*/1;
delete type;
return result;
}
string next_filesystem_word(istream& in) {
skip_whitespace_and_comments(in);
if (in.peek() == '[') {
string result = slurp_quoted(in);
skip_whitespace_and_comments_but_not_newline(in);
return result;
}
ostringstream out;
slurp_word(in, out);
skip_whitespace_and_comments(in);
return out.str();
}
void skip_whitespace(istream& in) {
while (true) {
if (!has_data(in)) break;
if (isspace(in.peek())) in.get();
else break;
}
}
|