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#include "code_generator.h"
#include <compiler/parser/parser.h>
#include <stdio.h>
#include <stdlib.h>
#include "utils/memory/memory.h"
#include "utils/types.h"
const char *COMMAND_STRINGS[] = {
"COMMAND_NONE",
"COMMAND_PRINT",
"COMMAND_PUSH_STRING",
};
void printInstruction(Instruction instruction) {
printf("%s", COMMAND_STRINGS[instruction.command]);
switch (instruction.command) {
case COMMAND_NONE:
case COMMAND_PRINT:
break;
case COMMAND_PUSH_STRING:
SizedString *sizedString = instruction.operand;
printf(" '%.*s'", (int)sizedString->size, sizedString->str);
break;
default:
fprintf(stderr, "bad instruction %d\n", instruction.command);
}
printf("\n");
}
void printInstructions(Instructions instructions) {
for (size_t i = 0; i < instructions.size; ++i) {
printInstruction(instructions.instructions[i]);
}
}
void deleteInstruction(Instruction instruction) {
switch (instruction.command) {
case COMMAND_NONE:
case COMMAND_PRINT:
break;
case COMMAND_PUSH_STRING:
SizedString *sizedString = instruction.operand;
free(sizedString->str);
free(sizedString);
break;
default:
fprintf(stderr, "bad instruction %d\n", instruction.command);
}
}
void deleteInstructions(Instructions instructions) {
for (size_t i = 0; i < instructions.size; ++i) {
deleteInstruction(instructions.instructions[i]);
}
free(instructions.instructions);
}
Instructions codeGenerator(ParsedNode *root) {
const ScopeMetadata *metadata = root->metadata;
size_t instructions_size = 10;
Instruction *instructions =
a404m_malloc(instructions_size * sizeof(Instruction));
size_t instructions_inserted = 0;
for (size_t i = 0; i < metadata->operands_size; ++i) {
ParsedNode *node = metadata->operands[i];
if (!nodeToInstruction(node, &instructions, &instructions_size,
&instructions_inserted)) {
goto RETURN_ERROR;
}
}
Instructions result = {
.instructions = a404m_realloc(
instructions, instructions_inserted * sizeof(Instruction)),
.size = instructions_inserted,
};
return result;
RETURN_ERROR:
const Instructions error = {
.instructions = NULL,
.size = ERROR_SIZE,
};
return error;
}
bool nodeToInstruction(ParsedNode *node, Instruction **instructions,
size_t *instructions_size,
size_t *instructions_inserted) {
switch (node->token) {
// TODO: this is wrong when you want functions
case PARSED_TOKEN_PARENTHESIS: {
const ScopeMetadata *metadata = node->metadata;
for (size_t i = 0; i < metadata->operands_size; ++i) {
if (!nodeToInstruction(metadata->operands[i], instructions,
instructions_size, instructions_inserted)) {
return false;
}
}
return true;
}
case PARSED_TOKEN_EOL:
return nodeToInstruction(node->metadata, instructions, instructions_size,
instructions_inserted);
case PARSED_TOKEN_PRINT:
if (nodeToInstruction(node->metadata, instructions, instructions_size,
instructions_inserted)) {
const Instruction instruction = {
.command = COMMAND_PRINT,
.operand = NULL,
};
insertInstruction(instruction, instructions, instructions_size,
instructions_inserted);
return true;
} else {
return false;
}
case PARSED_TOKEN_VALUE_STRING: {
SizedString *string = nodeToString(node);
if (string == NULL) {
return false;
}
const Instruction instruction = {
.command = COMMAND_PUSH_STRING,
.operand = string,
};
insertInstruction(instruction, instructions, instructions_size,
instructions_inserted);
return true;
}
case PARSED_TOKEN_NONE:
case PARSED_TOKEN_ROOT:
}
fprintf(stderr, "unexpected token %s\n", PARSED_TOKEN_STRINGS[node->token]);
return false;
}
void insertInstruction(const Instruction instruction,
Instruction **restrict instructions,
size_t *restrict instructions_size,
size_t *restrict instructions_inserted) {
if (*instructions_inserted == *instructions_size) {
*instructions_size += *instructions_size / 2 + 1;
*instructions =
a404m_realloc(*instructions, *instructions_size * sizeof(Instruction));
}
(*instructions)[*instructions_inserted] = instruction;
++*instructions_inserted;
}
SizedString *nodeToString(ParsedNode const *node) {
const char *strBegin = node->strBegin + 1;
const char *strEnd = node->strEnd - 1;
char *str = a404m_malloc((strEnd - strBegin + 1) * sizeof(char));
size_t inserted = 0;
for (char const *iter = strBegin; iter < strEnd; ++iter) {
char c = *iter;
if (c == '\\') {
if (++iter < strEnd) {
switch (*iter) {
case '\'':
c = '\'';
break;
case '\"':
c = '\"';
break;
case '\\':
c = '\\';
break;
case 'a':
c = '\a';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
/*case 'u':*/ // TODO: do it
/* c = '';*/
/* break;*/
default:
fprintf(stderr, "bad string, bad '\\'\n");
goto RETURN_ERROR;
}
} else {
fprintf(stderr, "bad string, bad '\\'\n");
goto RETURN_ERROR;
}
}
str[inserted] = c;
++inserted;
}
str[inserted] = '\0';
SizedString *string = a404m_malloc(sizeof(SizedString));
string->str = a404m_realloc(str, (inserted + 1) * sizeof(char));
string->size = inserted;
return string;
RETURN_ERROR:
free(str);
return NULL;
}
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