94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
#include "scope.h"
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#include "variables.h"
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#include "types.h"
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#include <vector>
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#include <stack>
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struct t_scope {
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std::vector<t_variable> variables;
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int total_size;
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};
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static t_scope global;
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static t_scope local;
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static std::stack<int> blocks;
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static bool are_we_inside_local = false;
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static t_variable *current_var = NULL;
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void scope_init() {
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global.variables.clear();
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global.total_size = 0;
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local.variables.clear();
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local.total_size = 0;
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while (!blocks.empty()) blocks.pop();
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are_we_inside_local = false;
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}
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void scope_open_local() {
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are_we_inside_local = true;
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}
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const int scope_close_local() {
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if (!blocks.empty()) {
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// Malament, no havem tancat algún block. No se si es detectarà abans per altra part. Per ara anem a deixar este comentari.
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}
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const int return_value = local.total_size;
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local.variables.clear();
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local.total_size = 0;
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are_we_inside_local = false;
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return return_value;
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}
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void scope_open_block() {
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blocks.push(local.variables.size());
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}
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void scope_close_block() {
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const int size_before_block = blocks.top();
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blocks.pop();
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while (local.variables.size() > size_before_block) local.variables.pop_back();
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}
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const uint32_t scope_declare_variable(const std::string name, const int type, const int length) {
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t_scope& scope = (are_we_inside_local ? local : global);
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if (are_we_inside_local) {
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for (int i = blocks.top(); i < scope.variables.size(); i++ ) if (scope.variables[i].name == name) return -1;
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} else {
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for (t_variable v : scope.variables) if (v.name == name) return -1;
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}
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const int address = scope.total_size;
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const t_variable var {name, type, length, address};
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scope.variables.push_back(var);
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scope.total_size += types_get_length(type) + (length == 0 ? 1 : length);
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return address;
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}
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const bool scope_variable_exists(const std::string name) {
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t_scope& scope = (are_we_inside_local ? local : global);
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for (t_variable v : scope.variables) if (v.name == name) {
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current_var = &v;
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return true;
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}
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}
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const uint32_t scope_get_variable_address() {
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if (current_var == NULL) {
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// ERROR INTERN
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}
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return current_var->address;
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}
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const int scope_get_variable_size() {
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if (current_var == NULL) {
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// ERROR INTERN
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}
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return current_var->length;
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}
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const int scope_get_variable_type() {
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if (current_var == NULL) {
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// ERROR INTERN
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}
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return current_var->type;
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}
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