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#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include "parse.h"
#include "hashtable.h"
sym_t* init_sym(prov_t province, litType_t litType, void* name) {
sym_t* symbol = malloc(sizeof(sym_t));
symbol->province = province;
symbol->litType = litType;
symbol->name = name;
symbol->argCount = 0;
return symbol;
}
sym_t* init_sym_key(char* value) {
char* vp = malloc((strlen(value) + 1) * sizeof(char));
strcpy(vp, value);
return init_sym(KEY_REF, NO_TYPE, vp);
}
sym_t* init_sym_int(int value) {
int* vp = malloc(sizeof(int));
*vp = value;
return init_sym(LITERAL, INT, vp);
}
sym_t* init_sym_str(char* value) {
char* vp = malloc((strlen(value) + 1) * sizeof(char));
strcpy(vp, value);
return init_sym(LITERAL, STRING, vp);
}
void destroy_sym(sym_t* symbol) {
free(symbol->name);
if (symbol->argCount > 0) {
free(symbol->args);
}
free(symbol);
}
void destroy_sym_tree(sym_t* origin) {
if (origin->province == KEY_REF) {
/* doesn't follow user-defined refs */
if (is_internal((char*)origin->name)) {
for (int i = 0; i < origin->argCount; i++) {
destroy_sym_tree(origin->args[i]);
}
destroy_sym(origin);
}
}
else if (origin->province == LITERAL) {
destroy_sym(origin);
}
}
int symtoi(sym_t* symbol) {
return *((int*)symbol->name);
}
float symtof(sym_t* symbol) {
return *((float*)symbol->name);
}
char* symtos(sym_t* symbol) {
return (char*)symbol->name;
}
void symbol_add_arg(sym_t* symbol, sym_t* arg) {
symbol->argCount += 1;
if (symbol->argCount == 1) {
symbol->args = malloc(sizeof(sym_t*));
}
else {
symbol->args = realloc(symbol->args, symbol->argCount * (sizeof(sym_t*)));
}
(symbol->args)[symbol->argCount - 1] = arg;
}
void symset_add_symbol(symset_t* symbolSet, sym_t* symbol) {
symbolSet->count += 1;
if (symbolSet->count == 1) {
symbolSet->symbols = malloc(sizeof(sym_t*));
}
else {
symbolSet->symbols = realloc(symbolSet->symbols, symbolSet->count * (sizeof(sym_t*)));
}
(symbolSet->symbols)[symbolSet->count - 1] = symbol;
}
symset_t* parse_symbols(char** str) {
symset_t* symbolSet = malloc(sizeof(symset_t));
symbolSet->count = 0;
while (1) {
/* clear whitespace */
while (!isalnum(**str) && **str != '(' && **str != ')' && **str != '\0') {
(*str)++;
}
if (**str == ')') {
(*str)++;
return symbolSet;
}
else if (**str == '\0') {
return symbolSet;
}
char* symbolName = calloc(30, sizeof(char));
int i = 0;
while (1) {
symbolName[i] = **str;
if (**str == ',' || **str == ';') {
(*str)++;
symbolName[i] = '\0';
sym_t* symbol;
/* TODO: float */
/* string */
/* TODO: more frees in here */
if (isalpha(symbolName[0])) {
//TODO: realloc this
symbol = init_sym_str(symbolName);
}
/* int */
else {
int v = atoi(symbolName);
symbol = init_sym_int(v);
}
symset_add_symbol(symbolSet, symbol);
break;
}
else if (**str == '(') {
(*str)++;
symbolName[i] = '\0';
sym_t* symbol;
if (i > 1) {
symbol = init_sym_key(symbolName);
}
else {
symbol = init_sym_key("root");
}
symset_t* symbols = parse_symbols(str);
for (int s = 0; s < symbols->count; s++) {
symbol_add_arg(symbol, symbols->symbols[s]);
}
symset_add_symbol(symbolSet, symbol);
break;
}
i++;
(*str)++;
}
free(symbolName);
}
}
sym_t* parse_symbol_final(char* str) {
char** strp = malloc(sizeof(char**));
*strp = str;
symset_t* finalSymset = parse_symbols(strp);
free(strp);
sym_t* root = init_sym_key("root");
for (int s = 0; s < finalSymset->count; s++) {
symbol_add_arg(root, finalSymset->symbols[s]);
}
return root;
}
/* TODO: improve this system */
int is_internal(char* name) {
unsigned int hash = get_hash(name);
if (hash == get_hash("root") || hash == get_hash("store")
|| hash == get_hash("eq") || hash == get_hash("if")
|| hash == get_hash("not") || hash == get_hash("sum")
|| hash == get_hash("print")) {
return 1;
}
return 0;
}
void write_symbol_visual(sym_t* symbol, int offset) {
for (int o = 0; o < offset; o++) {
printf(" ");
}
if (symbol->province == KEY_REF) {
printf("%s (%s)\n", (char*)(symbol->name), "KEY");
}
else if (symbol->province == LITERAL) {
if (symbol->litType == INT) {
printf("%d (%s)\n", *(int*)(symbol->name), "LITERAL");
}
else if (symbol->litType == FLOAT) {
printf("%f (%s)\n", *(float*)(symbol->name), "LITERAL");
}
else if (symbol->litType == STRING) {
printf("%s (%s)\n", (char*)(symbol->name), "LITERAL");
}
}
else {
printf("symbol parse error\n");
}
for (int i = 0; i < symbol->argCount; i++) {
write_symbol_visual(symbol->args[i], offset + 4);
}
}
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