sexy inter time:

include/bf_interpreter.h

@@ -71,5 +71,6 @@ class brainfuck_interpreter
 
 void interpret_bf(const std::string& program);
 void interpret_bf(bf_tokenizer& tokenizer);
+void interpret_bf_test(bf_tokenizer& tokenizer);
 
 #endif //BRAINFUCK_MISC_BF_INTERPRETER_H

libraries/BLT

@@ -1 +1 @@
-Subproject commit b4a7ee403560f2413dc4983cf56dae74c14e926f
+Subproject commit 02c62a2d63f704bba8de5eb7dc151babb53473c3

src/bf_interpreter.cpp

@@ -5,6 +5,8 @@
  */
 #include <bf_interpreter.h>
 #include <iostream>
+#include <functional>
+#include <utility>
 
 template<typename functor>
 static inline void match(functor f, int sp, size_t& index, const std::string& program)
@@ -77,6 +79,27 @@ void interpret_bf(const std::string& program)
     }
 }
 
+std::function<void(brainfuck_interpreter& inter, size_t offset, size_t& index, const std::vector<token_t>& tokens)> funcs[8] = {
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) { inter.increment_dp(off); },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) { inter.decrement_dp(off); },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) {
+            inter.increment(static_cast<int8_t>(off));
+        },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) {
+            inter.decrement(static_cast<int8_t>(off));
+        },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) { inter.print(std::cout); },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) { inter.read(std::cin); },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) {
+            if (inter.is() == 0)
+                match([](size_t& idx) { return ++idx; }, 1, index, tokens);
+        },
+        [](brainfuck_interpreter& inter, size_t off, size_t& index, const std::vector<token_t>& tokens) {
+            if (inter.is() != 0)
+                match([](size_t& idx) { return --idx; }, -1, index, tokens);
+        },
+};
+
 void interpret_bf(bf_tokenizer& tokenizer)
 {
     brainfuck_interpreter fuck;
@@ -119,6 +142,20 @@ void interpret_bf(bf_tokenizer& tokenizer)
     }
 }
 
+void interpret_bf_test(bf_tokenizer& tokenizer)
+{
+    brainfuck_interpreter fuck;
+    auto& tokens = tokenizer.data();
+    
+    size_t index = 0;
+    while (index < tokens.size())
+    {
+        auto& c = tokens[index];
+        funcs[static_cast<std::underlying_type_t<bf_token>>(c.type)](fuck, c.offset, index, tokens);
+        index++;
+    }
+}
+
 void brainfuck_interpreter::check_size()
 {
     if (_dp >= _size)

src/bf_mips_codegen.cpp

@@ -48,12 +48,12 @@ void codegen(bf_tokenizer& tokenizer, std::ostream& out)
                 break;
             case bf_token::INC_DV:
                 out       << "\tlb    $t1, ($t0)\n"
-                          << "\taddi  $t1, $t1, " << static_cast<uint8_t>(token.offset) << "\n"
+                          << "\taddi  $t1, $t1, " << std::to_string(static_cast<uint8_t>(token.offset)) << "\n"
                           << "\tsb    $t1, ($t0)\n";
                 break;
             case bf_token::DEC_DV:
                 out << "\tlb    $t1, ($t0)\n"
-                          << "\tsubi  $t1, $t1, " << static_cast<uint8_t>(token.offset) << "\n"
+                          << "\tsubi  $t1, $t1, " << std::to_string(static_cast<uint8_t>(token.offset)) << "\n"
                           << "\tsb    $t1, ($t0)\n";
                 break;
             case bf_token::PRINT:

src/bf_tokenizer.cpp

@@ -55,43 +55,59 @@ class characterizer
         }
 };
 
+std::optional<bf_token> getType(char c)
+{
+    switch (c)
+    {
+        case '>':
+            return (bf_token::INC_DP);
+        case '<':
+            return (bf_token::DEC_DP);
+        case '+':
+            return (bf_token::INC_DV);
+        case '-':
+            return (bf_token::DEC_DV);
+        case '.':
+            return (bf_token::PRINT);
+        case ',':
+            return (bf_token::READ);
+        case '[':
+            return (bf_token::OPEN);
+        case ']':
+            return (bf_token::CLOSE);
+        default:
+            return {};
+    }
+}
+
 void bf_tokenizer::tokenize(const std::string& program)
 {
     characterizer tk{program};
     while (tk.hasNext())
     {
-        auto dv = tk.fetch();
+        // TODO: something better + an optional wrapper
-        bf_token type = bf_token::PRINT;
+        std::optional<bf_token> type = getType(tk.peek());
-        switch (dv.type)
+        if (type.has_value())
         {
-            case '>':
+            switch (type.value())
-                type = (bf_token::INC_DP);
+            {
-                break;
+                case bf_token::INC_DP:
-            case '<':
+                case bf_token::DEC_DP:
-                type = (bf_token::DEC_DP);
+                case bf_token::INC_DV:
-                break;
+                case bf_token::DEC_DV:
-            case '+':
+                    tokens.emplace_back(type.value(), tk.fetch().count);
-                type = (bf_token::INC_DV);
+                    continue;
-                break;
+                case bf_token::PRINT:
-            case '-':
+                case bf_token::READ:
-                type = (bf_token::DEC_DV);
+                case bf_token::OPEN:
-                break;
+                case bf_token::CLOSE:
-            case '.':
+                    tokens.emplace_back(type.value(), 1);
-                type = (bf_token::PRINT);
-                break;
-            case ',':
-                type = (bf_token::READ);
-                break;
-            case '[':
-                type = (bf_token::OPEN);
-                break;
-            case ']':
-                type = (bf_token::CLOSE);
-                break;
-            default:
                     break;
             }
-        tokens.emplace_back(type, dv.count);
+            
+        }
+        // weird syntax relying on the continue;
+        tk.advance();
     }
 }
 

src/main.cpp

@@ -7,10 +7,11 @@
 #include <bf_mips_codegen.h>
 #include <bf_interpreter.h>
 #include <blt/profiling/profiler_v2.h>
+#include "blt/std/format.h"
 
 int main(int argc, const char** argv)
 {
-    std::string file{"../helloworld.bf"};
+    std::string file{"../mandelbrot.bf"};
     if (argc > 1)
         file = argv[1];
     auto program = blt::fs::loadBrainFuckFile(file);
@@ -21,13 +22,17 @@ int main(int argc, const char** argv)
     codegen(tokenizer, out);
     
     BLT_START_INTERVAL("Interpreters", "Basic");
-    interpret_bf(program);
+    //interpret_bf(program);
     BLT_END_INTERVAL("Interpreters", "Basic");
     
     BLT_START_INTERVAL("Interpreters", "Tokens");
     interpret_bf(tokenizer);
     BLT_END_INTERVAL("Interpreters", "Tokens");
     
+    BLT_START_INTERVAL("Interpreters", "Tokens Test");
+    interpret_bf_test(tokenizer);
+    BLT_END_INTERVAL("Interpreters", "Tokens Test");
+    
     BLT_PRINT_PROFILE("Interpreters");
     
     //interpret_bf(program);