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#include "parser.h"
#include <compiler/lexer/lexer.h>
#include <stdio.h>
#include <stdlib.h>
#include <utils/memory/memory.h>
const char *PARSED_TOKEN_STRINGS[] = {
"PARSED_TOKEN_NONE", "PARSED_TOKEN_ROOT",
"PARSED_TOKEN_PRINT", "PARSED_TOKEN_PARENTHESIS",
"PARSED_TOKEN_VALUE_STRING", "PARSED_TOKEN_EOL",
};
static const ParseOrder PARSE_ORDER[] = {
{
.ltr = true,
.size = 2,
.tokens =
{
TOKEN_OPERATOR_PARENTHESES_CLOSE,
TOKEN_OPERATOR_CURLY_BRACKET_CLOSE,
},
},
{
.ltr = true,
.size = 3,
.tokens =
{
TOKEN_OPERATOR_ASSIGN,
TOKEN_OPERATOR_EQUAL,
TOKEN_OPERATOR_COLON,
},
},
{
.ltr = true,
.size = 1,
.tokens =
{
TOKEN_KEYWORD_PRINT,
},
},
{
.ltr = true,
.size = 1,
.tokens =
{
TOKEN_STRING,
},
},
{
.ltr = true,
.size = 1,
.tokens =
{
TOKEN_OPERATOR_EOL,
},
},
};
static size_t PARSE_ORDER_SIZE = sizeof(PARSE_ORDER) / sizeof(ParseOrder);
ParsedNode *newParsedNode(char const *strBegin, char const *strEnd,
ParsedToken token, void *metadata,
ParsedNode *parent) {
ParsedNode *parsedNode = a404m_malloc(sizeof(*parsedNode));
parsedNode->strBegin = strBegin;
parsedNode->strEnd = strEnd;
parsedNode->token = token;
parsedNode->metadata = metadata;
parsedNode->parent = parent;
return parsedNode;
}
void _printParsedNode(const ParsedNode *parsedNode, int indent) {
for (int i = 0; i < indent; ++i) printf(" ");
printf("{token=%s", PARSED_TOKEN_STRINGS[parsedNode->token]);
switch (parsedNode->token) {
case PARSED_TOKEN_NONE:
break;
case PARSED_TOKEN_PARENTHESIS:
case PARSED_TOKEN_ROOT: {
++indent;
const ScopeMetadata *metadata = parsedNode->metadata;
printf(",operands=[\n");
for (size_t i = 0; i < metadata->operands_size; ++i) {
_printParsedNode(metadata->operands[i], indent + 1);
}
for (int i = 0; i < indent; ++i) printf(" ");
printf("]\n");
--indent;
} break;
case PARSED_TOKEN_PRINT: {
const PrintMetadata *metadata = parsedNode->metadata;
printf(",operand=\n");
_printParsedNode(metadata, indent + 1);
} break;
case PARSED_TOKEN_VALUE_STRING:
printf("\n");
break;
case PARSED_TOKEN_EOL: {
EOLMetadata *metadata = parsedNode->metadata;
printf(",operand=\n");
_printParsedNode(metadata, indent + 1);
} break;
default:
fprintf(stderr, "bad parsed token %d at compiler line %d\n",
parsedNode->token, __LINE__);
exit(1);
}
for (int i = 0; i < indent; ++i) printf(" ");
printf("}\n");
}
void printParsedNode(const ParsedNode *parsedNode) {
_printParsedNode(parsedNode, 0);
}
ParsedNode *getUntilCommonFather(ParsedNode *parsedNode, ParsedNode *parent) {
while (parsedNode != NULL && parsedNode->parent != parent) {
parsedNode = parsedNode->parent;
}
return parsedNode;
}
void deleteParsedNode(ParsedNode *parsedNode) {
switch (parsedNode->token) {
case PARSED_TOKEN_NONE:
break;
case PARSED_TOKEN_PARENTHESIS:
case PARSED_TOKEN_ROOT: {
ScopeMetadata *metadata = parsedNode->metadata;
for (size_t i = 0; i < metadata->operands_size; ++i) {
deleteParsedNode(metadata->operands[i]);
}
free(metadata->operands);
free(metadata);
} break;
case PARSED_TOKEN_PRINT: {
PrintMetadata *metadata = parsedNode->metadata;
deleteParsedNode(metadata);
} break;
case PARSED_TOKEN_VALUE_STRING:
break;
case PARSED_TOKEN_EOL: {
EOLMetadata *metadata = parsedNode->metadata;
deleteParsedNode(metadata);
break;
}
default:
fprintf(stderr, "bad parsed token %d at compiler line %d\n",
parsedNode->token, __LINE__);
exit(1);
}
free(parsedNode);
}
ParsedNode *parser(Nodes lexedNodes) {
ParsedNode *root = a404m_malloc(sizeof(ParsedNode));
root->token = PARSED_TOKEN_ROOT;
root->parent = NULL;
root->metadata = parserScopeCode(lexedNodes.nodes,
lexedNodes.nodes + lexedNodes.size, root);
if (root->metadata == NULL) {
free(root);
return NULL;
}
return root;
}
ScopeMetadata *parserScope(Node *nodesBegin, Node *nodesEnd, ParsedNode *parent,
bool (*isAllowed)(ParsedToken)) {
if (nodesBegin >= nodesEnd) {
return NULL;
}
size_t nodes_size = 0;
ParsedNode **nodes = a404m_malloc(nodes_size * sizeof(ParsedNode *));
size_t nodes_inserted = 0;
for (size_t order_index = 0; order_index < PARSE_ORDER_SIZE; ++order_index) {
const ParseOrder order = PARSE_ORDER[order_index];
for (Node *node = order.ltr ? nodesBegin : (nodesEnd - 1);
nodesBegin <= node && node < nodesEnd; order.ltr ? ++node : --node) {
for (size_t order_tokens_index = 0; order_tokens_index < order.size;
++order_tokens_index) {
if (node->token == order.tokens[order_tokens_index]) {
ParsedNode *parsedNode =
parseNode(nodesBegin, nodesEnd, node, parent);
if (parsedNode == NULL) {
fprintf(stderr, "error in parsing token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
goto RETURN_ERROR;
}
if (nodes_size == nodes_inserted) {
nodes_size += nodes_size / 2 + 1;
nodes = a404m_realloc(nodes, nodes_size * sizeof(ParsedNode *));
}
nodes[nodes_inserted] = parsedNode;
++nodes_inserted;
}
}
}
}
for (Node *node = nodesBegin; node < nodesEnd; ++node) {
if (node->token != TOKEN_PARSED) {
fprintf(stderr, "error in parsing token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
goto RETURN_ERROR;
}
}
ParsedNode **operands = a404m_malloc(nodes_inserted * sizeof(ParsedNode *));
nodes_size = nodes_inserted;
nodes_inserted = 0;
for (size_t i = 0; i < nodes_size; ++i) {
ParsedNode *currentNode = nodes[i];
if (currentNode->parent == parent) {
if (!isAllowed(currentNode->token)) {
fprintf(
stderr,
"error in parsing token '%s' is not allowed at compiler line %d\n",
PARSED_TOKEN_STRINGS[currentNode->token], __LINE__);
goto RETURN_ERROR;
}
operands[nodes_inserted] = currentNode;
++nodes_inserted;
}
}
free(nodes);
ScopeMetadata *metadata = a404m_malloc(sizeof(ScopeMetadata));
metadata->operands =
a404m_realloc(operands, nodes_inserted * sizeof(ParsedNode *));
metadata->operands_size = nodes_inserted;
return metadata;
RETURN_ERROR:
free(nodes);
return NULL;
}
static bool isAllowedCodeScope(ParsedToken token) {
switch (token) {
case PARSED_TOKEN_NONE:
case PARSED_TOKEN_ROOT:
case PARSED_TOKEN_PRINT:
case PARSED_TOKEN_PARENTHESIS:
case PARSED_TOKEN_VALUE_STRING:
return false;
case PARSED_TOKEN_EOL:
return true;
}
fprintf(stderr, "bad token '%d' at compiler line %d\n", token, __LINE__);
exit(1);
}
static bool isAllowedParenthesisScope(ParsedToken token) {
switch (token) {
case PARSED_TOKEN_PARENTHESIS:
case PARSED_TOKEN_VALUE_STRING:
return true;
case PARSED_TOKEN_NONE:
case PARSED_TOKEN_ROOT:
case PARSED_TOKEN_PRINT:
case PARSED_TOKEN_EOL:
return false;
}
fprintf(stderr, "bad token '%d' at compiler line %d\n", token, __LINE__);
exit(1);
}
ScopeMetadata *parserScopeCode(Node *nodesBegin, Node *nodesEnd,
ParsedNode *parent) {
return parserScope(nodesBegin, nodesEnd, parent, isAllowedCodeScope);
}
ScopeMetadata *parserScopeParenthesis(Node *nodesBegin, Node *nodesEnd,
ParsedNode *parent) {
return parserScope(nodesBegin, nodesEnd, parent, isAllowedParenthesisScope);
}
ParsedNode *parseNode(Node *nodesBegin, Node *nodesEnd, Node *node,
ParsedNode *parent) {
switch (node->token) {
case TOKEN_KEYWORD_PRINT:
return parserPrint(nodesBegin, nodesEnd, node, parent);
case TOKEN_OPERATOR_PARENTHESES_CLOSE:
return parseParenthesis(nodesBegin, nodesEnd, node, parent);
case TOKEN_STRING:
return parseString(node, parent);
case TOKEN_OPERATOR_EOL:
return parseEOL(nodesBegin, nodesEnd, node, parent);
default:
fprintf(stderr, "unexpected token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
return NULL;
}
}
ParsedNode *parserPrint(Node *, Node *nodesEnd, Node *node,
ParsedNode *parent) {
Node *follow = node + 1;
if (follow < nodesEnd && follow->token == TOKEN_PARSED) {
ParsedNode *root = a404m_malloc(sizeof(ParsedNode));
root->strBegin = node->strBegin;
root->strEnd = node->strEnd;
root->token = PARSED_TOKEN_PRINT;
root->parent = parent;
ParsedNode *operand = root->metadata =
getUntilCommonFather(follow->parsedNode, parent);
if (operand == NULL || operand->token != PARSED_TOKEN_PARENTHESIS) {
fprintf(stderr, "error in parsing token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
free(root);
return NULL;
}
operand->parent = root;
node->parsedNode = root;
node->token = TOKEN_PARSED;
return root;
}
return NULL;
}
ParsedNode *parseParenthesis(Node *nodesBegin, Node *, Node *node,
ParsedNode *parent) {
ParsedNode *parsedNode = a404m_malloc(sizeof(*parsedNode));
Node *opening = NULL;
Node *closing = node;
for (Node *iter = closing - 1; iter >= nodesBegin; --iter) {
if (iter->token == TOKEN_OPERATOR_PARENTHESES_OPEN) {
opening = iter;
break;
}
}
if (opening == NULL) {
fprintf(stderr, "error in parsing token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
goto RETURN_ERROR;
}
parsedNode->strBegin = opening->strBegin;
parsedNode->strEnd = closing->strEnd;
parsedNode->token = PARSED_TOKEN_PARENTHESIS;
parsedNode->parent = parent;
const ScopeMetadata *metadata = parsedNode->metadata =
parserScopeParenthesis(opening + 1, closing, parsedNode);
if (metadata == NULL) {
fprintf(stderr, "error in parsing token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
goto RETURN_ERROR;
}
closing->parsedNode = opening->parsedNode = parsedNode;
opening->token = closing->token = TOKEN_PARSED;
return parsedNode;
RETURN_ERROR:
free(parsedNode);
return NULL;
}
ParsedNode *parseString(Node *node, ParsedNode *parent) {
node->token = TOKEN_PARSED;
return node->parsedNode =
newParsedNode(node->strBegin, node->strEnd,
PARSED_TOKEN_VALUE_STRING, NULL, parent);
}
ParsedNode *parseEOL(Node *nodesBegin, Node *, Node *node, ParsedNode *parent) {
Node *before = node - 1;
if (before < nodesBegin && before->token != TOKEN_PARSED) {
return NULL;
}
ParsedNode *experession = getUntilCommonFather(before->parsedNode, parent);
if (experession == NULL) {
fprintf(stderr, "error in parsing token '%s' at compiler line %d\n",
TOKEN_STRINGS[node->token], __LINE__);
return NULL;
}
ParsedNode *root = a404m_malloc(sizeof(ParsedNode));
root->strBegin = node->strBegin;
root->strEnd = node->strEnd;
root->token = PARSED_TOKEN_EOL;
root->parent = parent;
root->metadata = experession;
experession->parent = root;
node->token = TOKEN_PARSED;
node->parsedNode = root;
return root;
}
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