From 43ff02231117bacb3cd60af0e654a0b3e8b5678b Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Thu, 23 Jan 2020 07:05:01 +0100
Subject: wip... there is a crash in get_or_create hash map

---
 README.md         |  3 ++-
 include/program.h |  7 ++++++-
 include/value.h   |  5 ++++-
 src/parser.c      | 13 -------------
 src/program.c     | 31 +++++++++++++++++++++++++++++++
 5 files changed, 43 insertions(+), 16 deletions(-)

diff --git a/README.md b/README.md
index bbf1212..3077b8f 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 A tiny scripting language that is designed to be a replacement for small shell/python scripts.\
-Written in ANSI C to allow embedding everywhere and a WTFPL license that allows it to be used anywhere without any restrictions.
+Written in ANSI C to allow embedding everywhere and a WTFPL license that allows it to be used anywhere without any restrictions.\
+See example.tsl for an example of what tsl looks like.
 # TODO
 * Remove dependency on `gc`. Write our own gc instead.
 * Implement big int, which numbers should automatically switch to when they are too large to fit into double.
diff --git a/include/program.h b/include/program.h
index 6135726..c097c7b 100644
--- a/include/program.h
+++ b/include/program.h
@@ -3,10 +3,15 @@
 
 #include "std/buffer.h"
 #include "std/hash_map.h"
+#include "value.h"
+
+#define TSL_STACK_MAX_SIZE 255
 
 typedef struct {
     TslBuffer /*TslBytecode*/ function_bytecode_list;
-    TslHashMap variables;
+    TslHashMap /*TslStringView, TslValue*/ variables;
+    TslValue stack_values[TSL_STACK_MAX_SIZE];
+    size_t stack_index;
 } TslProgram;
 
 typedef enum {
diff --git a/include/value.h b/include/value.h
index 1d053b7..58e57fe 100644
--- a/include/value.h
+++ b/include/value.h
@@ -14,6 +14,9 @@ typedef enum {
     TSL_TYPE_USERDATA
 } TslType;
 
+/* TODO: Support BigInt */
+typedef double TslNumber;
+
 typedef enum {
     TSL_FALSE,
     TSL_TRUE
@@ -36,7 +39,7 @@ typedef struct {
 
 typedef struct {
     union {
-        double number;
+        TslNumber number;
         TslString *string;
         TslBool boolean;
         TslList *list;
diff --git a/src/parser.c b/src/parser.c
index 608f670..098962a 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -65,19 +65,6 @@ static void tsl_parser_pop_function(TslParser *self) {
     tsl_buffer_pop(&self->function_bytecode_list_index, sizeof(int));
 }
 
-#if 0
-static uint64_t hash_string_view(const void *data, size_t size) {
-    uint64_t result = 0xdec05eba;
-    const uint8_t *p = data;
-    while(size) {
-        result = ((result << 5) + result) + *p;
-        ++p;
-        --size;
-    }
-    return result;
-}
-#endif
-
 static TslParseResult tsl_parser_parse_map(TslParser *self, int *num_items) {
     #define parse_map_element_separator                                             \
         return_if_error(tsl_tokenizer_accept(&self->tokenizer, TSL_TOKEN_COLON));   \
diff --git a/src/program.c b/src/program.c
index 862931a..3ec6f85 100644
--- a/src/program.c
+++ b/src/program.c
@@ -1,10 +1,12 @@
 #include "../include/program.h"
 #include "../include/bytecode.h"
 #include <stdio.h>
+#include <assert.h>
 
 void tsl_program_init(TslProgram *self) {
     tsl_buffer_init(&self->function_bytecode_list);
     tsl_hash_map_init(&self->variables);
+    self->stack_index = 0;
 }
 
 void tsl_program_deinit(TslProgram *self) {
@@ -18,7 +20,27 @@ void tsl_program_deinit(TslProgram *self) {
     tsl_hash_map_deinit(&self->variables);
 }
 
+static uint64_t hash_string_view(const void *data, size_t size) {
+    uint64_t result = 0xdec05eba;
+    const uint8_t *p = data;
+    while(size) {
+        result = ((result << 5) + result) + *p;
+        ++p;
+        --size;
+    }
+    return result;
+}
+
 TslProgramResult tsl_program_run(TslProgram *self) {
+    #define push(value, type_enum, value_field)                                 \
+        do {                                                                    \
+            if(self->stack_index == TSL_STACK_MAX_SIZE)                         \
+                return TSL_PROGRAM_RESULT_ERR;                                  \
+            self->stack_values[self->stack_index].data.value_field = (value);   \
+            self->stack_values[self->stack_index].type = (type_enum);           \
+            ++self->stack_index;                                                \
+        } while(0)
+
     TslBytecode *file_scope_bytecode = tsl_buffer_begin(&self->function_bytecode_list);
     char *instruction = tsl_buffer_begin(&file_scope_bytecode->buffer);
     char *instruction_end = tsl_buffer_end(&file_scope_bytecode->buffer);
@@ -33,11 +55,13 @@ TslProgramResult tsl_program_run(TslProgram *self) {
         switch(opcode) {
             case TSL_OPCODE_LOADN: {
                 printf("loadn %f\n", instruction_type2->value);
+                push(instruction_type2->value, TSL_TYPE_NUMBER, number);
                 instruction += sizeof(TslInstructionType2);
                 break;
             }
             case TSL_OPCODE_LOADB: {
                 printf("loadb %s\n", instruction_type3->value ? "true" : "false");
+                push(instruction_type3->value, TSL_TYPE_BOOL, boolean);
                 instruction += sizeof(TslInstructionType3);
                 break;
             }
@@ -62,7 +86,14 @@ TslProgramResult tsl_program_run(TslProgram *self) {
                 break;
             }
             case TSL_OPCODE_SETV: {
+                TslValue stack_value;
+                TslValue *value;
                 printf("setv \"%.*s\"\n", (int)instruction_type4->value.size, instruction_type4->value.data);
+                assert(self->stack_index > 0);
+                stack_value = self->stack_values[--self->stack_index];
+                if(!tsl_hash_map_get_or_create(&self->variables, &instruction_type4->value, sizeof(TslValue), hash_string_view, (void**)&value))
+                    return TSL_PROGRAM_RESULT_ERR;
+                *value = stack_value;
                 instruction += sizeof(TslInstructionType4);
                 break;
             }
-- 
cgit v1.2.3