asar coverage - build #

src/asar/
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medium: ≥ 75.0%
high: ≥ 90.0%
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math_parse.cpp
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1 #include "asar.h"
2 #include "assembleblock.h"
3 #include "asar_math.h"
4 #include "table.h"
5 #include "unicode.h"
6 #include <cmath>
7
8 #include "math_ast.h"
9
10
11 bool foundlabel;
12 // WARNING: this flag is only correctly set in pass 0, as forward labels are
13 // always non-static but we don't know when we hit forward-labels past pass 0
14 bool foundlabel_static;
15 // only set in pass 0
16 bool forwardlabel;
17
18
19 std::unordered_map<string, math_user_function> user_functions;
20
21 // we don't need this struct to be exported
22 namespace {
23 // data necessary for parsing an expression, which might be an user function declaration
24 struct parse_context {
25 const char*& str;
26 // this map is empty unless declaring a function,
27 // in which case it maps argument name to argument index
28 const std::unordered_map<string, size_t> function_arg_names;
29 // these are methods to allow easier access to `str`
30 owned_node parse_atom();
31 owned_node parse_unops();
32 owned_node parse_binops(int depth = 0);
33 owned_node parse();
34 };
35 }
36
37
38 static const int8_t hextable[128] = {
39 // 0 1 2 3 4 5 6 7 8 9 a b c d e f
40 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
41 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
42 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
43 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,
44 -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
45 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
46 -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
47 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
48 };
49
50 // "atom" = literal, parenthesized expression, or label reference
51 21019 owned_node parse_context::parse_atom() {
52
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 21019 if(*str == '$') {
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 6529 if (!is_xdigit(*++str)) throw_err_block(2, err_invalid_hex_value);
54 6529 const char* start = str;
55 6529 int64_t ret = 0; // todo error on overflow?
56
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 27851 while ((unsigned char)*str < 0x80 && hextable[(unsigned char)*str] >= 0) {
57
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 21322 ret = (ret << 4) | hextable[(unsigned char)*str++];
58 }
59 6529 int len = str - start;
60 6529 int len_bytes = (len+1)/2;
61
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 6529 return std::make_unique<math_ast_literal>(ret, len_bytes);
62 }
63
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 14490 if (is_ualpha(*str) || *str=='.' || *str=='?') {
64 2715 const char * start=str;
65
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 20802 while (is_ualnum(*str) || *str == '.' || *str == '?') str++;
66 2715 int len=(int)(str-start);
67
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 2795 while (*str==' ') str++;
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 2715 if (*str=='(') {
69 1043 str++;
70 1043 string func_name;
71
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 1043 func_name.assign(start, len);
72 1043 std::vector<owned_node> arguments;
73
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 3451 while(*str != ')') {
74
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 1367 while (*str==' ') str++;
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 1365 arguments.emplace_back(parse_binops());
76 // is "invalid number" good here?
77
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 1365 if(*str != ',' && *str != ')') throw_err_block(2, err_invalid_number);
78
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 1365 if(*str == ',') str++;
79 }
80 1043 str++;
81 // ternary is basically just a function called "?"
82
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 1043 if(func_name == "?") {
83
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 38 if(arguments.size() != 3) {
84 ✗ throw_err_block(2, err_argument_count, 3, (int)arguments.size());
85 }
86
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 133 return std::make_unique<math_ast_ternary_cond>(
87 38 std::move(arguments[0]),
88 38 std::move(arguments[1]),
89 76 std::move(arguments[2]));
90 }
91
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 1005 return std::make_unique<math_ast_function_call>(std::move(arguments), std::move(func_name));
92 1043 } else {
93
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 1672 string name_part(start, len);
94
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 1672 if(name_part == "...") {
95 // a tiny bit ugly, but whatever
96
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 352 return std::make_unique<math_ast_literal>(math_val::make_identifier(name_part));
97 }
98
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 1320 if(!function_arg_names.empty()) {
99
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 120 auto it = function_arg_names.find(name_part);
100
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 120 if(it != function_arg_names.end()) {
101
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 120 return std::make_unique<math_ast_function_argument>(it->second);
102 }
103 }
104
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 1200 string name = labelname(&start);
105 1200 str = start;
106
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 1200 if(*str == '[') {
107 // struct array indexing
108 50 str++;
109
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 50 auto index = parse_binops();
110
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 50 if(*str != ']') throw_err_block(2, err_invalid_label_missing_closer);
111 50 str++;
112
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 50 string subname = name;
113
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 50 if(*str == '.') {
114 // this part used to be in labelname... not sure where it really belongs....
115
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 288 while (is_ualnum(*str) || *str == '.') {
116
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 240 subname += *(str++);
117 }
118 }
119 // when doing base[index].sub:
120 // result = (base_addr + index*object_size(base)) + sub_offset
121 // = sub_addr + index*object_size(base)
122 // so we build a math node that represents this calculation
123
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 50 auto node_sub = std::make_unique<math_ast_label>(subname);
124
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 50 auto node_base = std::make_unique<math_ast_label>(name);
125 50 std::vector<owned_node> arg_list;
126
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 50 arg_list.emplace_back(std::move(node_base));
127
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 50 auto node_objsize = std::make_unique<math_ast_function_call>(std::move(arg_list), "objectsize");
128
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 50 auto node_mul = std::make_unique<math_ast_binop>(std::move(node_objsize), std::move(index), math_binop_type::mul);
129
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 50 auto node_add = std::make_unique<math_ast_binop>(std::move(node_mul), std::move(node_sub), math_binop_type::add);
130 50 return node_add;
131 50 } else {
132
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 1150 return std::make_unique<math_ast_label>(std::move(name));
133 }
134 1672 }
135 }
136
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 11775 if(*str == '(') {
137 152 str++;
138
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 152 auto res = parse_binops();
139
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 152 if(*str != ')') throw_err_block(2, err_mismatched_parentheses);
140 152 str++;
141 152 return res;
142 152 }
143
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 11623 if(*str == '%') {
144
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 20 if (str[1] != '0' && str[1] != '1') throw_err_block(2, err_invalid_binary_value);
145 20 const char* start = str+1;
146
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 20 uint64_t res = strtoull(str+1, const_cast<char**>(&str), 2);
147 20 int len = str - start;
148
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 20 return std::make_unique<math_ast_literal>((int64_t)res, (len+7)/8);
149 }
150
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 11603 if (*str=='\'') {
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 248 if (!str[1]) throw_err_block(2, err_invalid_character);
152 124 int orig_val;
153 248 str++;
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 248 str += utf8_val(&orig_val, str);
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 248 if (orig_val == -1) throw_err_block(0, err_invalid_utf8);
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 248 if (*str != '\'') throw_err_block(2, err_invalid_character);
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 248 int64_t rval=thetable.get_val(orig_val);
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 248 if (rval == -1)
159 {
160 // RPG Hacker: Should be fine to not check return value of codepoint_to_utf8() here, because
161 // our error cases above already made sure that orig_val contains valid data at this point.
162 ✗ string u8_str;
163 ✗ codepoint_to_utf8(&u8_str, orig_val);
164 ✗ throw_err_block(2, err_undefined_char, u8_str.data());
165 ✗ }
166 248 str++;
167
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 248 return std::make_unique<math_ast_literal>(rval, 1);
168 }
169
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 11355 if (is_digit(*str)) {
170 11007 const char* end = str;
171 11007 bool is_float = false;
172
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 25324 while (is_digit(*end) || *end == '.') {
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 14317 if(*end == '.') is_float = true;
174 14317 end++;
175 }
176 11007 string number;
177
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 11007 number.assign(str, (int)(end - str));
178 11007 str = end;
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 11007 if(is_float) {
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 80 double res = std::atof(number);
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 80 return std::make_unique<math_ast_literal>(res);
182 } else {
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 10927 int64_t res = strtoll(number, nullptr, 10);
184
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 10927 int len = (res >= 0x10000) ? 3 : (res >= 0x100) ? 2 : 1;
185
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 10927 return std::make_unique<math_ast_literal>(res, len);
186 }
187 11007 }
188
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 348 if(*str == '"') {
189 336 const char * strpos = str + 1;
190
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 336 str = strchr(strpos, '"');
191
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 336 if(!str) throw_err_block(2, err_mismatched_quotes);
192
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 336 string output(strpos, str - strpos);
193
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 344 while(str && str[1] == '"') {
194 // we hit an escaped quote
195
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 8 output += '"';
196 8 strpos = str+2;
197
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 8 str = strchr(strpos, '"');
198
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 8 if(!str) throw_err_block(2, err_mismatched_quotes);
199
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 8 output.append(strpos, 0, str - strpos);
200 }
201 336 str++;
202
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 362 while (*str==' ') str++; //eat space
203
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 336 return std::make_unique<math_ast_literal>(std::move(output));
204 336 }
205 12 throw_err_block(2, err_invalid_number);
206 }
207
208 21085 owned_node parse_context::parse_unops() {
209
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 23635 while(*str == ' ') str++;
210 // optimize for the common case
211 // TODO how much of an optimization is this really?
212
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 21085 if(*str == '$') return parse_atom();
213
214
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 14556 if(*str == '-') {
215 40 str++;
216
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 40 return std::make_unique<math_ast_unop>(parse_unops(), math_unop_type::neg);
217
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 14516 } else if(*str == '~') {
218 8 str++;
219
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 8 return std::make_unique<math_ast_unop>(parse_unops(), math_unop_type::bit_not);
220
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 14508 } else if(*str == '<' && str[1] == ':') {
221 18 str += 2;
222
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 18 return std::make_unique<math_ast_unop>(parse_unops(), math_unop_type::bank_extract);
223
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 14490 } else if(*str == '+') {
224 ✗ str++;
225 ✗ return parse_unops();
226 }
227 14490 else return parse_atom();
228 }
229
230 21055 owned_node parse_context::parse_binops(int depth) {
231 21055 const char* posneglabel = str;
232
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 21055 string posnegname = posneglabelname(&posneglabel, false);
233
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 21121 if (posnegname.length() > 0 &&
234
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 68 (*posneglabel == '\0' || *posneglabel == ')' || *posneglabel == ',')) {
235 34 str = posneglabel;
236
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 34 return std::make_unique<math_ast_label>(posnegname);
237 }
238
239
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 21019 recurseblock rec;
240
241
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 21019 owned_node left = parse_unops();
242 21007 owned_node right;
243
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 23463 while(*str == ' ') str++;
244
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 26066 while (*str && *str != ')' && *str != ','&& *str != ']') {
245
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 5121 while(*str == ' ') str++;
246 // TODO can we make this macro a bit nicer???
247 #define oper(name, thisdepth, contents) \
248 if (!strncmp(str, name, strlen(name))) \
249 { \
250 if (depth<=thisdepth) \
251 { \
252 str += strlen(name); \
253 right = parse_binops(thisdepth+1); \
254 left = std::make_unique<math_ast_binop>(std::move(left), std::move(right), contents); \
255 continue; \
256 } \
257 else return left; \
258 }
259
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 5121 oper("**", 6, math_binop_type::pow);
260
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 5109 oper("*", 5, math_binop_type::mul);
261
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 5073 oper("/", 5, math_binop_type::div);
262
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 5039 oper("%", 5, math_binop_type::mod);
263
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 5037 oper("+", 4, math_binop_type::add);
264
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 3058 oper("-", 4, math_binop_type::sub);
265
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 2524 oper("<<", 3, math_binop_type::shift_left);
266
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 2522 oper(">>", 3, math_binop_type::shift_right);
267
268 //these two needed checked early to avoid bitwise from eating a operator
269
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 2502 oper("&&", 0, math_binop_type::logical_and);
270
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 2476 oper("||", 0, math_binop_type::logical_or);
271
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 2462 oper("&", 2, math_binop_type::bit_and);
272
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 2462 oper("|", 2,math_binop_type::bit_or);
273
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 2450 oper("^", 2, math_binop_type::bit_xor);
274
275
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 2450 oper(">=", 1, math_binop_type::comp_ge);
276
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 2442 oper("<=", 1, math_binop_type::comp_le);
277
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 2440 oper(">", 1, math_binop_type::comp_gt);
278
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 2300 oper("<", 1, math_binop_type::comp_lt);
279
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 498 oper("==", 1, math_binop_type::comp_eq);
280
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 56 oper("!=", 1, math_binop_type::comp_ne);
281
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 16 throw_err_block(2, err_unknown_operator);
282 #undef oper
283 }
284 20945 return left;
285 21113 }
286
287 14429 owned_node parse_context::parse() {
288 14429 auto res = parse_binops();
289
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 14399 if(*str) {
290 ✗ if(*str == ',') throw_err_block(2, err_invalid_input);
291 ✗ else throw_err_block(2, err_mismatched_parentheses);
292 }
293 14399 return res;
294 ✗ }
295
296 66 void createuserfunc(const char * name, const char * arguments, const char * content) {
297
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 66 if(user_functions.count(name) != 0 || builtin_functions.count(name) != 0) {
298 ✗ throw_err_block(0, err_function_redefined, name);
299 }
300
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 66 string arguments_buf = arguments;
301 // TODO: if we want to be more lenient with spaces in the `function`
302 // command, then we need to handle spaces inside `arguments_buf`
303 33 int numargs;
304
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 66 autoptr<char**> spl = split(arguments_buf.raw(), ',', &numargs);
305 66 size_t arg_count = numargs;
306
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 66 if(numargs == 1 && spl[0] == string{""}) {
307 12 arg_count = 0;
308 }
309 66 std::unordered_map<string, size_t> arg_indices;
310
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 144 for(size_t i = 0; i < arg_count; i++) {
311
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 78 string argname = spl[i];
312
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 78 if(arg_indices.count(argname)) {
313 ✗ throw_err_block(0, err_duplicate_param_name, argname.data(), name);
314 }
315
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 78 if(!confirmname(argname)) {
316 ✗ throw_err_block(0, err_invalid_param_name, argname.data());
317 }
318
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 78 arg_indices.emplace(std::move(argname), i);
319 78 }
320
321
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 66 parse_context ctx{ content, arg_indices };
322 // define the function name with a dummy function to allow recursive calls to it within its own body
323
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 66 math_user_function dummy_func = { std::make_unique<math_ast_literal>((int64_t)0), arg_count };
324
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 66 auto func_slot = user_functions.emplace(name, std::move(dummy_func)).first;
325
326
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 66 auto parsed = ctx.parse();
327 66 math_user_function userfunc = { std::move(parsed), arg_count };
328 66 func_slot->second = std::move(userfunc);
329 99 }
330
331 14363 owned_node parse_math_expr(const char * str) {
332 14363 parse_context parse_ctx { str, {}};
333
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 28696 return parse_ctx.parse();
334 14363 }
335
336 956 int64_t getnum(const char * str) {
337
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 956 owned_node parsed = parse_math_expr(str);
338
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 956 int haslabel = parsed->has_label();
339 956 foundlabel = haslabel > 0;
340 956 foundlabel_static = haslabel < 2;
341 956 forwardlabel = haslabel == 7;
342
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 1912 math_val rval = parsed->evaluate();
343
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 1912 return rval.get_integer();
344 1912 }
345
346 414 int getlen(const char * orgstr, bool optimizebankextraction) {
347
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 414 owned_node parsed = parse_math_expr(orgstr);
348
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 414 int letgen = parsed->get_len(optimizebankextraction);
349 414 return letgen;
350 414 }
351
352 862 void initmathcore()
353 {
354 862 user_functions.clear();
355 862 }
356
357 852 void deinitmathcore()
358 {
359 //not needed
360 852 }
361