asar coverage - build #271

src/asar/
File: src/asar/math_parse.cpp
Date: 2025-03-03 19:43:36
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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 long hextable[] = {
39 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
40 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
41 -1,-1, 0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,-1,10,11,12,13,14,15,-1,
42 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
43 -1,-1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
44 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-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,-1,-1,-1,-1,-1,-1,-1,
46 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-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,-1,-1,-1,-1,-1,-1,-1,
48 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
49 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
50 };
51
52 // "atom" = literal, parenthesized expression, or label reference
53 20860 owned_node parse_context::parse_atom() {
54
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 20860 if(*str == '$') {
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 6518 if (!is_xdigit(*++str)) throw_err_block(2, err_invalid_hex_value);
56 6518 const char* start = str;
57 6518 int64_t ret = 0; // todo error on overflow?
58
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 27754 while (hextable[0 + *str] >= 0) {
59
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 21236 ret = (ret << 4) | hextable[0 + *str++];
60 }
61 6518 int len = str - start;
62 6518 int len_bytes = (len+1)/2;
63
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 6518 return std::make_unique<math_ast_literal>(ret, len_bytes);
64 }
65
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 14342 if (is_ualpha(*str) || *str=='.' || *str=='?') {
66 2570 const char * start=str;
67
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 20110 while (is_ualnum(*str) || *str == '.') str++;
68 2570 int len=(int)(str-start);
69
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 2648 while (*str==' ') str++;
70
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 2570 if (*str=='(') {
71 1010 str++;
72 1010 string func_name;
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 1010 func_name.assign(start, len);
74 1010 std::vector<owned_node> arguments;
75
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 3282 while(*str != ')') {
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 1262 while (*str==' ') str++;
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 1262 arguments.emplace_back(parse_binops());
78 // is "invalid number" good here?
79
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 1262 if(*str != ',' && *str != ')') throw_err_block(2, err_invalid_number);
80
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 1262 if(*str == ',') str++;
81 }
82 1010 str++;
83
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 1010 return std::make_unique<math_ast_function_call>(std::move(arguments), std::move(func_name));
84 1010 } else {
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 1560 string name_part(start, len);
86
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 1560 if(name_part == "...") {
87 // a tiny bit ugly, but whatever
88
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 350 return std::make_unique<math_ast_literal>(math_val::make_identifier(name_part));
89 }
90
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 1210 if(!function_arg_names.empty()) {
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 54 auto it = function_arg_names.find(name_part);
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 54 if(it != function_arg_names.end()) {
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 54 return std::make_unique<math_ast_function_argument>(it->second);
94 }
95 }
96
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 1156 string name = labelname(&start);
97 1156 str = start;
98
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 1156 if(*str == '[') {
99 // struct array indexing
100 50 str++;
101
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 50 auto index = parse_binops();
102
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 50 if(*str != ']') throw_err_block(2, err_invalid_label_missing_closer);
103 50 str++;
104
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 50 string subname = name;
105
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 50 if(*str == '.') {
106 // this part used to be in labelname... not sure where it really belongs....
107
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 288 while (is_ualnum(*str) || *str == '.') {
108
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 240 subname += *(str++);
109 }
110 }
111 // when doing base[index].sub:
112 // result = (base_addr + index*object_size(base)) + sub_offset
113 // = sub_addr + index*object_size(base)
114 // so we build a math node that represents this calculation
115
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 50 auto node_sub = std::make_unique<math_ast_label>(subname);
116
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 50 auto node_base = std::make_unique<math_ast_label>(name);
117 50 std::vector<owned_node> arg_list;
118
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 50 arg_list.emplace_back(std::move(node_base));
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 50 auto node_objsize = std::make_unique<math_ast_function_call>(std::move(arg_list), "objectsize");
120
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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);
121
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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);
122 50 return node_add;
123 50 } else {
124
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 1106 return std::make_unique<math_ast_label>(name);
125 }
126 1560 }
127 }
128
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 11772 if(*str == '(') {
129 164 str++;
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 164 auto res = parse_binops();
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 164 if(*str != ')') throw_err_block(2, err_mismatched_parentheses);
132 164 str++;
133 164 return res;
134 164 }
135
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 11608 if(*str == '%') {
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 20 if (str[1] != '0' && str[1] != '1') throw_err_block(2, err_invalid_binary_value);
137 20 const char* start = str+1;
138
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 20 uint64_t res = strtoull(str+1, const_cast<char**>(&str), 2);
139 20 int len = str - start;
140
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 20 return std::make_unique<math_ast_literal>((int64_t)res, (len+7)/8);
141 }
142
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 11588 if (*str=='\'') {
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 226 if (!str[1]) throw_err_block(2, err_invalid_character);
144 113 int orig_val;
145 226 str++;
146
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 226 str += utf8_val(&orig_val, str);
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 226 if (orig_val == -1) throw_err_block(0, err_invalid_utf8);
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 226 if (*str != '\'') throw_err_block(2, err_invalid_character);
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 226 int64_t rval=thetable.get_val(orig_val);
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 226 if (rval == -1)
151 {
152 // RPG Hacker: Should be fine to not check return value of codepoint_to_utf8() here, because
153 // our error cases above already made sure that orig_val contains valid data at this point.
154 ✗ string u8_str;
155 ✗ codepoint_to_utf8(&u8_str, orig_val);
156 ✗ throw_err_block(2, err_undefined_char, u8_str.data());
157 ✗ }
158 226 str++;
159
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 226 return std::make_unique<math_ast_literal>(rval, 1);
160 }
161
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 11362 if (is_digit(*str)) {
162 11210 const char* end = str;
163 11210 bool is_float = false;
164
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 25860 while (is_digit(*end) || *end == '.') {
165
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 14650 if(*end == '.') is_float = true;
166 14650 end++;
167 }
168 11210 string number;
169
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 11210 number.assign(str, (int)(end - str));
170 11210 str = end;
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 11210 if(is_float) {
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 132 double res = std::atof(number);
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 132 return std::make_unique<math_ast_literal>(res);
174 } else {
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 11078 int64_t res = strtoll(number, nullptr, 10);
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 11078 int len = (res >= 0x10000) ? 3 : (res >= 0x100) ? 2 : 1;
177
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 11078 return std::make_unique<math_ast_literal>(res, len);
178 }
179 11210 }
180
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 152 if(*str == '"') {
181 142 const char * strpos = str + 1;
182
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 142 while (*str!='"' && *str!='\0') str++;
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 142 str = strchr(str + 1, '"'); // TODO don't we have string escapes????
184
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 142 string tempname(strpos , (int)(str - strpos));
185 142 str++;
186
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 142 while (*str==' ') str++; //eat space
187
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 142 return std::make_unique<math_ast_literal>(tempname);
188 142 }
189 10 throw_err_block(2, err_invalid_number);
190 }
191
192 20950 owned_node parse_context::parse_unops() {
193
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 23530 while(*str == ' ') str++;
194 // optimize for the common case
195 // TODO how much of an optimization is this really?
196
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 20950 if(*str == '$') return parse_atom();
197
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 14432 if(*str == '-') {
199 64 str++;
200
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 64 return std::make_unique<math_ast_unop>(parse_unops(), math_unop_type::neg);
201
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 14368 } else if(*str == '~') {
202 8 str++;
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 8 return std::make_unique<math_ast_unop>(parse_unops(), math_unop_type::bit_not);
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 14360 } else if(*str == '<' && str[1] == ':') {
205 18 str += 2;
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 18 return std::make_unique<math_ast_unop>(parse_unops(), math_unop_type::bank_extract);
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 14342 } else if(*str == '+') {
208 ✗ str++;
209 ✗ return parse_unops();
210 }
211 14342 else return parse_atom();
212 }
213
214 20894 owned_node parse_context::parse_binops(int depth) {
215 20894 const char* posneglabel = str;
216
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 20894 string posnegname = posneglabelname(&posneglabel, false);
217
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 20974 if (posnegname.length() > 0 &&
218
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 80 (*posneglabel == '\0' || *posneglabel == ')')) {
219 34 str = posneglabel;
220
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 34 return std::make_unique<math_ast_label>(posnegname);
221 }
222
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 20860 recurseblock rec;
224
225
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 20860 owned_node left = parse_unops();
226 20850 owned_node right;
227
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 23430 while(*str == ' ') str++;
228
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 25968 while (*str && *str != ')' && *str != ','&& *str != ']') {
229
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 5190 while(*str == ' ') str++;
230 // TODO can we make this macro a bit nicer???
231 #define oper(name, thisdepth, contents) \
232 if (!strncmp(str, name, strlen(name))) \
233 { \
234 if (depth<=thisdepth) \
235 { \
236 str += strlen(name); \
237 right = parse_binops(thisdepth+1); \
238 left = std::make_unique<math_ast_binop>(std::move(left), std::move(right), contents); \
239 continue; \
240 } \
241 else return left; \
242 }
243
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 5190 oper("**", 6, math_binop_type::pow);
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 5178 oper("*", 5, math_binop_type::mul);
245
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 5142 oper("/", 5, math_binop_type::div);
246
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 5108 oper("%", 5, math_binop_type::mod);
247
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 5108 oper("+", 4, math_binop_type::add);
248
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 3134 oper("-", 4, math_binop_type::sub);
249
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 2602 oper("<<", 3, math_binop_type::shift_left);
250
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 2596 oper(">>", 3, math_binop_type::shift_right);
251
252 //these two needed checked early to avoid bitwise from eating a operator
253
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 2572 oper("&&", 0, math_binop_type::logical_and);
254
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 2542 oper("||", 0, math_binop_type::logical_or);
255
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 2524 oper("&", 2, math_binop_type::bit_and);
256
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 2524 oper("|", 2,math_binop_type::bit_or);
257
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 2518 oper("^", 2, math_binop_type::bit_xor);
258
259
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 2518 oper(">=", 1, math_binop_type::comp_ge);
260
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 2512 oper("<=", 1, math_binop_type::comp_le);
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 2506 oper(">", 1, math_binop_type::comp_gt);
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 2368 oper("<", 1, math_binop_type::comp_lt);
263
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 568 oper("==", 1, math_binop_type::comp_eq);
264
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 64 oper("!=", 1, math_binop_type::comp_ne);
265
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 16 throw_err_block(2, err_unknown_operator);
266 #undef oper
267 }
268 20778 return left;
269 20952 }
270
271 14300 owned_node parse_context::parse() {
272 14300 auto res = parse_binops();
273
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 14274 if(*str) {
274 ✗ if(*str == ',') throw_err_block(2, err_invalid_input);
275 ✗ else throw_err_block(2, err_mismatched_parentheses);
276 }
277 14274 return res;
278 ✗ }
279
280 48 void createuserfunc(const char * name, const char * arguments, const char * content) {
281
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 48 if(user_functions.count(name) != 0 || builtin_functions.count(name) != 0) {
282 ✗ throw_err_block(0, err_function_redefined, name);
283 }
284
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 48 string arguments_buf = arguments;
285 // TODO: if we want to be more lenient with spaces in the `function`
286 // command, then we need to handle spaces inside `arguments_buf`
287 24 int numargs;
288
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 48 autoptr<char**> spl = split(arguments_buf.raw(), ',', &numargs);
289 48 size_t arg_count = numargs;
290
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 48 if(numargs == 1 && spl[0] == string{""}) {
291 12 arg_count = 0;
292 }
293 48 std::unordered_map<string, size_t> arg_indices;
294
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 102 for(size_t i = 0; i < arg_count; i++) {
295
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 54 string argname = spl[i];
296
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 54 if(arg_indices.count(argname)) {
297 ✗ throw_err_block(0, err_duplicate_param_name, argname.data(), name);
298 }
299
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 54 if(!confirmname(argname)) {
300 ✗ throw_err_block(0, err_invalid_param_name, argname.data());
301 }
302
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 54 arg_indices.emplace(std::move(argname), i);
303 54 }
304
305
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 48 parse_context ctx{ content, arg_indices };
306
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 48 auto parsed = ctx.parse();
307 48 math_user_function userfunc = { std::move(parsed), arg_count };
308
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 48 user_functions.emplace(name, std::move(userfunc));
309 72 }
310
311 14252 owned_node parse_math_expr(const char * str) {
312 14252 parse_context parse_ctx { str, {}};
313
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 28478 return parse_ctx.parse();
314 14252 }
315
316 3114 int64_t getnum(const char * str) {
317
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 3114 owned_node parsed = parse_math_expr(str);
318
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 3100 int haslabel = parsed->has_label();
319 3100 foundlabel = haslabel > 0;
320 3100 foundlabel_static = haslabel < 2;
321 3100 forwardlabel = haslabel == 7;
322
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 6268 math_val rval = parsed->evaluate();
323
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 6064 return rval.get_integer();
324 6200 }
325
326 414 int getlen(const char * orgstr, bool optimizebankextraction) {
327
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 414 owned_node parsed = parse_math_expr(orgstr);
328
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 414 int letgen = parsed->get_len(optimizebankextraction);
329 414 return letgen;
330 414 }
331
332 837 void initmathcore()
333 {
334 837 user_functions.clear();
335 837 }
336
337 827 void deinitmathcore()
338 {
339 //not needed
340 827 }
341