start working on text representation and constants

Makefile

@@ -2,7 +2,7 @@ SRC=src
 OBJ=obj
 
 CC=gcc
-CFLAGS=-Wall -Wextra -O3
+CFLAGS=-Wall -Wextra -fPIC -O3
 
 TARGET=libgravity.so
 TEST_TARGET=testapp
@@ -17,7 +17,7 @@ $(OBJ)/%.o: $(SRC)/%.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
 $(TEST_TARGET): test.c $(TARGET)
-	$(CC) $(CFLAGS) test.c -lgravity -L. -o $(TEST_TARGET) 
+	$(CC) $(CFLAGS) test.c -lgravity -L. -o $(TEST_TARGET)
 
 test: $(TEST_TARGET)
 
@@ -25,9 +25,9 @@ setup:
 	mkdir -p $(OBJ)
 
 clean:
+	rm -r $(OBJ)/*.o
 	rm $(TARGET)
 	rm $(TEST_TARGET)
-	rm -r $(OBJ)/*.o
 
 install: $(TARGET)
 	sudo cp $(TARGET) /usr/local/lib/

include/gravity/core.h

@@ -6,12 +6,10 @@
 
 // === TYPE DEFINITIONS === //
 typedef struct GravityOpaqueModule* GravityModule;
-
 typedef struct GravityOpaqueValue* GravityValue;
-
 typedef struct GravityOpaqueBuilder* GravityBuilder;
-
 typedef struct GravityOpaqueFunction* GravityFunction;
+typedef struct GravityOpaqueBlock* GravityBlock;
 
 typedef struct GravityOpaqueType* GravityType;
 typedef enum {
@@ -27,9 +25,20 @@ GravityModule gravityCreateModule(void);
 GravityBuilder gravityCreateBuilder(void);
 
 GravityFunction gravityNewFunction(GravityModule module, const char* name, GravityType functionType);
+GravityBlock gravityStartBlock(const char* name, GravityFunction function, uint16_t numBlockParams, ...);
+
+GravityValue newIntConstant(GravityType intType, int64_t value);
 
 GravityType gravityCreateFunctionType(int numArgs, GravityType* argTypes, GravityType returnType);
 GravityType gravityCreateIntegerType(uint8_t width, bool isSigned);
+
+char* gravityModuleToCStr(GravityModule module);
+char* gravityTypeToCStr(GravityType type);
+char* gravityFunctionToCStr(GravityFunction function);
+char* gravityValueToCStr(GravityValue value);
+
+void gravityPositionBuilderAtEnd(GravityBuilder builder, GravityBlock block);
+GravityValue gravityBuildAlloc(GravityBuilder builder, GravityType type, const char* name);
 // ============================ //
 
 #endif

src/block.c

@@ -0,0 +1,24 @@
+#include "block.h"
+
+char* gravityBlockToCStr(GravityBlock block) {
+    StringBuffer buff;
+    initStringBuff(&buff);
+
+    // print block header
+    sbAppend(&buff, "%s (", block->name);
+    for (unsigned int i = 0; i < block->numParams; i++) {
+        if (i < block->numParams - 1) {
+            sbAppend(&buff, "%s, ", gravityTypeToCStr(block->paramTypes[i]));
+        } else {
+            sbAppend(&buff, "%s", gravityTypeToCStr(block->paramTypes[i]));
+        }
+    }
+    sbAppend(&buff, "):\n");
+
+    for (unsigned int i = 0; i < block->instructions.count; i++) {
+        GravityInstruction inst = *get(block->instructions, i);
+        sbAppend(&buff, "    %s\n", gravityInstructionToCStr(inst));
+    }
+
+    return buff.data;
+}

src/block.h

@@ -3,11 +3,20 @@
 
 #include "list.h"
 #include "instruction.h"
+#include "type.h"
+
+typedef struct GravityOpaqueBlock* GravityBlock;
 
 UseList(GravityInstruction);
 
-typedef struct {
+struct GravityOpaqueBlock {
+    const char* name;
+    GravityType* paramTypes;
+    uint16_t numParams;
+
     List(GravityInstruction) instructions;
-} GravityBlock;
+};
+
+char* gravityBlockToCStr(GravityBlock block);
 
 #endif

src/builder.c

@@ -1,8 +1,44 @@
 #include "builder.h"
 
-GravityBuilder* gravityCreateBuilder(void) {
-    GravityBuilder* newBuilder = malloc(sizeof(GravityBuilder));
+void gravityBuildInstruction(GravityBuilder builder, GravityOpcode opcode, GravityValue* operands, size_t numOperands, GravityValue result) {
+    assert(builder->currentBlock != NULL);
+
+    // copy operands list to avoid stack lifetime
+    GravityValue* operandsCopy = calloc(numOperands, sizeof(GravityValue));
+    if (!operandsCopy)
+        return;
+    memcpy(operandsCopy, operands, sizeof(GravityValue) * numOperands);
+    
+    GravityInstruction newInst = {
+        .opcode = opcode,
+        .operands = operandsCopy,
+        .numOperands = numOperands,
+        .result = result
+    };
+
+    append(builder->currentBlock->instructions, newInst);
+}
+
+GravityBuilder gravityCreateBuilder(void) {
+    GravityBuilder newBuilder = malloc(sizeof(struct GravityOpaqueBuilder));
     if (newBuilder == NULL) return newBuilder;
 
     return newBuilder;
+}
+
+void gravityPositionBuilderAtEnd(GravityBuilder builder, GravityBlock block) {
+    builder->currentBlock = block;
+}
+
+GravityValue gravityBuildAlloc(GravityBuilder builder, GravityType type, const char* name) {
+    GravityValue result = gravityNewValue(name, gravityCreatePointerType());
+
+    GravityType wrapperType = gravityCreateType();
+    wrapperType->typeKind = GravityTypeTypeKind;
+    wrapperType->typeData = type;\
+
+    GravityValue constant = gravityNewConstant(wrapperType);
+    gravityBuildInstruction(builder, GravityOpcodeAlloc, (GravityValue[]){constant}, 1, result);
+
+    return result;
 }

src/builder.h

@@ -3,13 +3,18 @@
 
 #include "block.h"
 #include <stdlib.h>
+#include <assert.h>
 
 typedef struct GravityOpaqueBuilder* GravityBuilder;
 
-struct {
+struct GravityOpaqueBuilder {
     GravityBlock currentBlock;
-} GravityOpaqueBuilder;
+};
 
 GravityBuilder gravityCreateBuilder(void);
 
+void gravityPositionBuilderAtEnd(GravityBuilder builder, GravityBlock block);
+
+GravityValue gravityBuildAlloc(GravityBuilder builder, GravityType type, const char* name);
+
 #endif

src/function.c

@@ -0,0 +1,57 @@
+#include "function.h"
+
+GravityBlock gravityStartBlock(const char* name, GravityFunction function, uint16_t numBlockParams, ...) {
+    GravityBlock newBlock = malloc(sizeof(struct GravityOpaqueBlock));
+    if (newBlock == NULL) return newBlock;
+
+    newBlock->name = strdup(name);
+
+    GravityType* paramTypes = calloc(numBlockParams, sizeof(GravityType));
+    if (paramTypes == NULL) {
+        free(newBlock);
+        return NULL;
+    }
+
+    va_list vargs;
+    va_start(vargs, numBlockParams);
+
+    for (unsigned int i = 0; i < numBlockParams; i++) {
+        paramTypes[i] = va_arg(vargs, GravityType);
+    }
+
+    newBlock->numParams = numBlockParams;
+    newBlock->paramTypes = paramTypes;
+    newBlock->instructions = newList(GravityInstruction);
+
+    append(function->blocks, newBlock);
+
+    return newBlock;
+}
+
+char* gravityFunctionToCStr(GravityFunction function) {
+    StringBuffer buff;
+    initStringBuff(&buff);
+
+    // print func header
+    sbAppend(&buff, "fn %s (", function->name);
+    for (unsigned int i = 0; i < function->functionType.numArgs; i++) {
+        if (i < function->functionType.numArgs) {
+            sbAppend(&buff, "%s, ", gravityTypeToCStr(function->functionType.argTypes[i]));
+            
+        } else {
+            sbAppend(&buff, "%s", gravityTypeToCStr(function->functionType.argTypes[i]));
+        }
+
+        break;
+    }
+
+    // print function blocks
+    sbAppend(&buff, ") %s {\n", gravityTypeToCStr(function->functionType.returnType));
+    for (unsigned int i = 0; i < function->blocks.count; i++) {
+        GravityBlock block = *get(function->blocks, i);
+        sbAppend(&buff, "%s\n", gravityBlockToCStr(block));
+    }
+    sbAppend(&buff, "}");
+
+    return buff.data;
+}

src/function.h

@@ -4,7 +4,10 @@
 #include "type.h"
 #include "block.h"
 #include "list.h"
-#include <assert.h>
+#include "strb.h"
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
 
 UseList(GravityBlock);
 
@@ -13,6 +16,10 @@ typedef struct GravityOpaqueFunction* GravityFunction;
 struct GravityOpaqueFunction {
     GravityFunctionType functionType;
     List(GravityBlock) blocks;
+    const char* name;
 };
 
+GravityBlock gravityStartBlock(const char* name, GravityFunction function, uint16_t numBlockParams, ...);
+char* gravityFunctionToCStr(GravityFunction function);
+
 #endif

src/instruction.c

@@ -0,0 +1,30 @@
+#include "instruction.h"
+
+char* gravityOpcodeToCStr(GravityOpcode opcode) {
+    switch (opcode) {
+        case GravityOpcodeAlloc: return "alloc";
+        case GravityOpcodeStore: return "store";
+        case GravityOpcodeLoad: return "load";
+        default: return "fixme";
+    }
+}
+
+char* gravityInstructionToCStr(GravityInstruction inst) {
+    StringBuffer buff;
+    initStringBuff(&buff);
+
+    if (inst.result != NULL) {
+        sbAppend(&buff, "%s = ", gravityValueToCStr(inst.result));
+    }
+
+    sbAppend(&buff, "%s ", gravityOpcodeToCStr(inst.opcode));
+    for (unsigned int i = 0; i < inst.numOperands; i++) {
+        if (i < inst.numOperands - 1) {
+            sbAppend(&buff, "%s, ", gravityValueToCStr(inst.operands[i]));
+        } else {
+            sbAppend(&buff, "%s", gravityValueToCStr(inst.operands[i]));
+        }
+    }
+
+    return buff.data;
+}

src/instruction.h

@@ -5,13 +5,19 @@
 #include <stddef.h>
 
 typedef enum {
-    GravityOpcodeAdd = 0
+    GravityOpcodeAlloc = 0,
+    GravityOpcodeStore,
+    GravityOpcodeLoad
 } GravityOpcode;
 
 typedef struct {
     GravityOpcode opcode;
     GravityValue* operands;
     size_t numOperands;
+    GravityValue result;
 } GravityInstruction;
 
+char* gravityInstructionToCStr(GravityInstruction inst);
+char* gravityOpcodeToCStr(GravityOpcode opcode);
+
 #endif

src/module.c

@@ -15,10 +15,23 @@ GravityFunction gravityNewFunction(GravityModule module, const char* name, Gravi
     GravityFunction newFunc = malloc(sizeof(struct GravityOpaqueFunction));
     if (newFunc == NULL) return newFunc;
 
+    newFunc->name = strdup(name);
     newFunc->blocks = newList(GravityBlock);
     newFunc->functionType = functionType->function;
 
     append(module->functions, newFunc);
 
     return newFunc;
+}
+
+char* gravityModuleToCStr(GravityModule module) {
+    StringBuffer buff;
+    initStringBuff(&buff);
+
+    for (unsigned int i = 0; i < module->functions.count; i++) {
+        GravityFunction func = *get(module->functions, i);
+        sbAppend(&buff, "%s\n\n", gravityFunctionToCStr(func));
+    }
+
+    return buff.data;
 }

src/module.h

@@ -3,7 +3,9 @@
 
 #include "function.h"
 #include "list.h"
+#include "strb.h"
 #include <stdlib.h>
+#include <assert.h>
 
 typedef struct GravityOpaqueModule* GravityModule;
 
@@ -17,4 +19,6 @@ GravityModule gravityCreateModule(void);
 
 GravityFunction gravityNewFunction(GravityModule module, const char* name, GravityType functionType);
 
+char* gravityModuleToCStr(GravityModule module);
+
 #endif

src/strb.c

@@ -0,0 +1,37 @@
+#include "strb.h"
+
+void initStringBuff(StringBuffer* sb) {
+    sb->capacity = 128;
+    sb->length = 0;
+    sb->data = (char*)malloc(sb->capacity);
+    sb->data[0] = '\0';
+}
+
+void sbAppend(StringBuffer* sb, const char* fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    
+    // Check how much space we need
+    va_list args_copy;
+    va_copy(args_copy, args);
+    int needed = vsnprintf(NULL, 0, fmt, args_copy);
+    va_end(args_copy);
+
+    if (needed < 0) {
+        va_end(args);
+        return;
+    }
+
+    // Grow buffer if needed
+    if (sb->length + needed >= sb->capacity) {
+        while (sb->length + needed >= sb->capacity) {
+            sb->capacity *= 2;
+        }
+        sb->data = (char*)realloc(sb->data, sb->capacity);
+    }
+
+    // Append the string safely
+    vsnprintf(sb->data + sb->length, needed + 1, fmt, args);
+    sb->length += needed;
+    va_end(args);
+}

src/strb.h

@@ -0,0 +1,18 @@
+#ifndef __GRAVITY__STRB_H
+#define __GRAVITY__STRB_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+typedef struct {
+    char* data;
+    size_t length;
+    size_t capacity;
+} StringBuffer;
+
+void initStringBuff(StringBuffer* sb);
+void sbAppend(StringBuffer* sb, const char* fmt, ...);
+
+#endif

src/type.c

@@ -2,6 +2,7 @@
 
 GravityType gravityCreateType(void) {
     GravityType type = malloc(sizeof(struct GravityOpaqueType));
+    type->typeKind = GravityIntTypeKind;
     return type;
 }
 
@@ -24,4 +25,47 @@ GravityType gravityCreateIntegerType(uint8_t width, bool isSigned) {
     type->integer.isSigned = isSigned;
 
     return type;
+}
+
+GravityType gravityCreatePointerType(void) {
+    GravityType type = gravityCreateType();
+    if (type == NULL) return type;
+
+    type->typeKind = GravityPointerTypeKind;
+
+    return type;
+}
+
+char* gravityTypeToCStr(GravityType type) {
+    StringBuffer buff;
+    initStringBuff(&buff);
+
+    switch (type->typeKind) {
+        case GravityIntTypeKind: {
+            if (type->integer.isSigned) {
+                sbAppend(&buff, "i%d", type->integer.width);
+            } else {
+                sbAppend(&buff, "u%d", type->integer.width);
+            }
+
+            break;
+        }
+
+        case GravityPointerTypeKind: {
+            sbAppend(&buff, "pointer");
+            break;
+        }
+
+        case GravityTypeTypeKind: {
+            sbAppend(&buff, "%s", gravityTypeToCStr(type->typeData));
+            break;
+        }
+
+        default: {
+            sbAppend(&buff, "type_fixme");
+            break;
+        }
+    }
+
+    return buff.data;
 }

src/type.h

@@ -2,9 +2,11 @@
 #define __GRAVITY__TYPE_H
 
 #include "list.h"
+#include "strb.h"
 #include <stddef.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include <assert.h>
 
 typedef struct GravityOpaqueType* GravityType;
 
@@ -13,6 +15,7 @@ typedef enum {
     GravityFloatTypeKind,
     GravityPointerTypeKind,
     GravityFunctionTypeKind,
+    GravityTypeTypeKind, // type name
 } GravityTypeKind;
 
 typedef struct {
@@ -31,11 +34,17 @@ struct GravityOpaqueType {
     union {
         GravityFunctionType function;
         GravityIntType integer;
+        GravityType typeData;
     };
 };
 
+UseList(GravityType);
+
 GravityType gravityCreateFunctionType(int numArgs, GravityType* argTypes, GravityType returnType);
 GravityType gravityCreateIntegerType(uint8_t width, bool isSigned);
 GravityType gravityCreateType(void);
+GravityType gravityCreatePointerType(void);
+
+char* gravityTypeToCStr(GravityType type);
 
 #endif

src/value.c

@@ -0,0 +1,96 @@
+#include "value.h"
+
+uint32_t globalValueIncrementer = 0;
+
+char* getIncrementedName(void) {
+    char* buffer = malloc(32);
+    if (buffer == NULL) return buffer;
+
+    snprintf(buffer, 32, "%%%d", globalValueIncrementer);
+
+    globalValueIncrementer++;
+
+    return buffer;
+}
+
+GravityValue gravityNewValue(const char* name, GravityType type) {
+    GravityValue newValue = malloc(sizeof(struct GravityOpaqueValue));
+    if (newValue == NULL) return newValue;
+
+    newValue->kind = GravityLocalValueKind;
+    newValue->type = type;
+
+    if (name == NULL) {
+        name = getIncrementedName();
+    } else {
+        name = strdup(name);
+    }
+
+    newValue->name = name;
+
+    return newValue;
+}
+
+GravityValue gravityTypeToTypeValue(GravityType type) {
+    GravityType valueType = gravityCreateType();
+    valueType->typeKind = GravityTypeTypeKind;
+    valueType->typeData = type;
+
+    GravityValue newValue = gravityNewValue(NULL, valueType);
+    if (newValue == NULL) return newValue;
+
+    return newValue;
+}
+
+char* gravityValueToCStr(GravityValue value) {
+    switch (value->kind) {
+        case GravityLocalValueKind:
+            
+            return strdup(value->name);
+
+        case GravityConstantValueKind: {
+            StringBuffer buff;
+            initStringBuff(&buff);
+
+            switch (value->type->typeKind) {
+                case GravityIntTypeKind: {
+                    sbAppend(&buff, "%ld", value->constant.intValue);
+                    break;
+                }
+
+                case GravityTypeTypeKind: {
+                    sbAppend(&buff, "%s", gravityTypeToCStr(value->type->typeData));
+                    break;
+                }
+
+                default: assert(false);
+            }
+
+            return buff.data;
+        }
+
+        default: assert(false);
+    }
+}
+
+GravityValue gravityNewConstant(GravityType type) {
+    GravityValue newValue = malloc(sizeof(struct GravityOpaqueValue));
+    if (newValue == NULL) return newValue;
+
+    newValue->kind = GravityConstantValueKind;
+    newValue->type = type;
+    newValue->name = NULL;
+
+    return newValue;
+}
+
+GravityValue newIntConstant(GravityType intType, int64_t value) {
+    assert(intType->typeKind == GravityIntTypeKind);
+
+    GravityValue newValue = gravityNewConstant(intType);
+    if (newValue == NULL) return newValue;
+
+    newValue->constant.intValue = value;
+
+    return newValue;
+}

src/value.h

@@ -3,9 +3,38 @@
 
 #include "type.h"
 
-typedef struct {
+extern uint32_t globalValueIncrementer;
+
+typedef struct GravityOpaqueValue* GravityValue;
+typedef struct GravityOpaqueConstant* GravityConstant;
+
+typedef enum {
+    GravityLocalValueKind,
+    GravityConstantValueKind
+} GravityValueKind;
+
+struct GravityOpaqueValue {
+    GravityValueKind kind;
     GravityType type;
-    const char* name;
-} GravityValue;
+    const char* name; // local name
+
+    union {
+        int64_t intValue;
+    } constant;
+};
+
+struct GravityOpaqueConstant {
+    GravityType type;
+    union {
+        int64_t intValue;
+    };
+};
+
+GravityValue gravityNewValue(const char* name, GravityType type);
+GravityValue gravityTypeToTypeValue(GravityType type);
+char* gravityValueToCStr(GravityValue value);
+
+GravityValue gravityNewConstant(GravityType type);
+GravityValue newIntConstant(GravityType intType, int64_t value);
 
 #endif

test.c

@@ -5,10 +5,16 @@ int main(void) {
     GravityModule module = gravityCreateModule();
     GravityBuilder builder = gravityCreateBuilder();
 
-    GravityType charType = gravityCreateIntegerType(1, false);
+    GravityType charType = gravityCreateIntegerType(8, false);
     
     GravityType mainFuncType = gravityCreateFunctionType(0, NULL, charType);
     GravityFunction mainFunc = gravityNewFunction(module, "main", mainFuncType);
+    GravityBlock entryBlock = gravityStartBlock("entry", mainFunc, 0);
+
+    gravityPositionBuilderAtEnd(builder, entryBlock);
+    GravityValue something = gravityBuildAlloc(builder, charType, NULL);
+
+    printf("%s\n", gravityFunctionToCStr(mainFunc));
 
     return 0;
 }