94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
#include "parser.h"
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#include "helper.h"
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int noomP_peek(noomP_Parser* parser, noomL_Token* token) {
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while (1) {
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int success = noomL_lex(parser->code, parser->lex_offset, token);
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if (!success) return -1; // TODO: proper error propogation and stuff
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if (token->type == NOOML_TOKEN_WHITESPACE) {
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// peek changes state, but only if it's one of these useless tokens anyway.
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parser->lex_offset += token->length;
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continue;
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}
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return 0;
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}
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}
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void noomP_skip(noomP_Parser* parser, noomL_Token* token) { // expects you to alr know the token
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if (token->type == NOOML_TOKEN_EOF) return;
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parser->lex_offset += token->length;
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}
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noomP_Node* noomP_allocNode(noomP_Parser* parser) {
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noomP_Node* node = noom_alloc(sizeof(noomP_Node));
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if (node == 0) return 0;
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node->previous_node = parser->last_node;
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node->subnodec = 0;
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node->subnodes = noom_alloc(sizeof(noomP_Node*) * 2);
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node->subnode_cap = 2;
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if (node->subnodes == 0) {
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noom_free(node);
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return 0;
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}
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parser->last_node = node;
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return node;
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}
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int noomP_addSubnode(noomP_Node* node, noomP_Node* subnode) {
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if (node->subnodec == node->subnode_cap) {
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node->subnode_cap = node->subnode_cap * 2;
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node->subnodes = noom_realloc(node->subnodes, sizeof(noomP_Node*) * node->subnode_cap);
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if (node->subnodes == 0) return -1;
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}
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node->subnodes[node->subnodec++] = subnode;
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return 0;
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}
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noomP_Node* noomP_parseStatement(noomP_Parser* parser) {
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return 0;
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}
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int noomP_parse(const char* code, const char* filename, noomP_Node** outpointer) {
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noomP_Parser parser;
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noomP_initParser(&parser, code, filename);
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noomL_Token token;
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noomP_Node* node = noomP_allocNode(&parser);
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node->type = NOOMP_NODE_PROGRAM;
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while (1) {
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noomP_peek(&parser, &token);
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if (token.type == NOOML_TOKEN_EOF) break;
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noomP_Node* child = noomP_parseStatement(&parser);
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if (child == 0) return -1;
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noomP_addSubnode(node, child);
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}
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node->type = NOOMP_NODE_PROGRAM;
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node->subnodec = 0;
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return 0;
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}
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int noomP_initParser(noomP_Parser* parser, const char* code, const char* filename) {
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parser->code = code;
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parser->filename = filename;
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parser->lex_offset = 0;
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parser->last_node = (void *)0;
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return 0;
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}
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