libabacus/src/libabacus.c

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#include "libabacus.h"
#include "lexer.h"
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#include "reserved.h"
#include "util.h"
#include <stdlib.h>
libab_result _prepare_types(libab* ab, void (*free_function)(void*));
libab_result libab_init(libab* ab, void* (*parse_function)(const char*),
void (*free_function)(void*)) {
int parser_initialized = 0;
int lexer_initialized = 0;
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libab_ref null_ref;
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libab_result result;
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libab_ref_null(&null_ref);
libab_ref_null(&ab->type_num);
libab_ref_null(&ab->type_function_list);
ab->impl.parse_num = parse_function;
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result = libab_create_table(&ab->table, &null_ref);
if (result == LIBAB_SUCCESS) {
result = _prepare_types(ab, free_function);
}
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if(result == LIBAB_SUCCESS) {
parser_initialized = 1;
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libab_parser_init(&ab->parser, &ab->table);
libab_interpreter_init(&ab->intr, &ab->table, &ab->impl);
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result = libab_lexer_init(&ab->lexer);
}
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if (result == LIBAB_SUCCESS) {
lexer_initialized = 1;
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result = libab_register_reserved_operators(&ab->lexer);
}
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if (result != LIBAB_SUCCESS) {
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libab_ref_free(&ab->table);
libab_ref_free(&ab->type_num);
libab_ref_free(&ab->type_function_list);
if(parser_initialized) {
libab_parser_free(&ab->parser);
libab_interpreter_free(&ab->intr);
}
if(lexer_initialized) {
libab_lexer_free(&ab->lexer);
}
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}
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libab_ref_free(&null_ref);
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return result;
}
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void _sanitize(char* to, const char* from, size_t buffer_size) {
size_t index = 0;
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while (*from && index < (buffer_size - 2)) {
if (*from == '+' || *from == '*' || *from == '\\')
to[index++] = '\\';
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to[index++] = *(from++);
}
to[index] = '\0';
}
void _initialize_behavior(libab_behavior* behavior, libab_ref* type,
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libab_function_ptr func) {
behavior->impl.variant = BIMPL_INTERNAL;
behavior->impl.data_u.internal = func;
libab_ref_copy(type, &behavior->type);
}
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libab_result _register_operator(libab* ab, const char* op,
libab_operator_variant token_type,
int precedence, int associativity,
libab_ref* type, libab_function_ptr func) {
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char op_buffer[8];
libab_result result = LIBAB_SUCCESS;
libab_table_entry* new_entry;
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if ((new_entry = malloc(sizeof(*new_entry)))) {
new_entry->variant = ENTRY_OP;
new_entry->data_u.op.precedence = precedence;
new_entry->data_u.op.associativity = associativity;
new_entry->data_u.op.type = token_type;
_initialize_behavior(&(new_entry->data_u.op.behavior), type, func);
} else {
result = LIBAB_MALLOC;
}
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if (result == LIBAB_SUCCESS) {
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_sanitize(op_buffer, op, 8);
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result = libab_convert_lex_result(
eval_config_add(&ab->lexer.config, op_buffer, TOKEN_OP));
}
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if (result == LIBAB_SUCCESS) {
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result = libab_table_put(libab_ref_get(&ab->table), op, new_entry);
}
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if (result != LIBAB_SUCCESS) {
if (new_entry)
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libab_ref_free(&new_entry->data_u.op.behavior.type);
eval_config_remove(&ab->lexer.config, op, TOKEN_OP);
free(new_entry);
}
return result;
}
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libab_result libab_register_operator_infix(libab* ab, const char* op,
int precedence, int associativity,
libab_ref* type,
libab_function_ptr func) {
return _register_operator(ab, op, OPERATOR_INFIX, precedence, associativity,
type, func);
}
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libab_result libab_register_operator_prefix(libab* ab, const char* op,
libab_ref* type,
libab_function_ptr func) {
return _register_operator(ab, op, OPERATOR_PREFIX, 0, 0, type, func);
}
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libab_result libab_register_operator_postfix(libab* ab, const char* op,
libab_ref* type,
libab_function_ptr func) {
return _register_operator(ab, op, OPERATOR_POSTFIX, 0, 0, type, func);
}
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libab_result libab_register_function(libab* ab, const char* name,
libab_ref* type, libab_function_ptr func) {
libab_result result = LIBAB_SUCCESS;
libab_table_entry* new_entry;
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if ((new_entry = malloc(sizeof(*new_entry)))) {
new_entry->variant = ENTRY_FUN;
_initialize_behavior(&(new_entry->data_u.function.behavior), type,
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func);
} else {
result = LIBAB_MALLOC;
}
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if (result == LIBAB_SUCCESS) {
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result = libab_table_put(libab_ref_get(&ab->table), name, new_entry);
}
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if (result != LIBAB_SUCCESS) {
if (new_entry)
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libab_ref_free(&new_entry->data_u.function.behavior.type);
free(new_entry);
}
return result;
}
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libab_result libab_register_basetype(libab* ab, const char* name,
libab_basetype* basetype) {
libab_result result = LIBAB_SUCCESS;
libab_table_entry* new_entry;
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if ((new_entry = malloc(sizeof(*new_entry)))) {
new_entry->variant = ENTRY_BASETYPE;
new_entry->data_u.basetype = basetype;
}
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if (result == LIBAB_SUCCESS) {
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result = libab_table_put(libab_ref_get(&ab->table), name, new_entry);
}
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if (result != LIBAB_SUCCESS) {
free(new_entry);
}
return result;
}
void _free_function_list(void* function_list) {
libab_function_list_free(function_list);
free(function_list);
}
static libab_basetype _basetype_function_list = {
_free_function_list,
NULL,
0
};
void _free_function(void* function) {
libab_function_free(function);
free(function);
}
static libab_basetype_param _basetype_function_params[] = {
{ BT_LIST, NULL }
};
static libab_basetype _basetype_function = {
_free_function,
_basetype_function_params,
1
};
libab_result _prepare_types(libab* ab, void (*free_function)(void*)) {
libab_result result = LIBAB_SUCCESS;
ab->basetype_num.count = 0;
ab->basetype_num.params = NULL;
ab->basetype_num.free_function = free_function;
libab_ref_null(&ab->type_num);
libab_ref_null(&ab->type_function_list);
if (result == LIBAB_SUCCESS) {
libab_ref_free(&ab->type_num);
result = libab_instantiate_basetype(&ab->basetype_num,
&ab->type_num, 0);
}
if (result == LIBAB_SUCCESS) {
libab_ref_free(&ab->type_function_list);
result = libab_instantiate_basetype(&_basetype_function_list,
&ab->type_function_list, 0);
}
if (result == LIBAB_SUCCESS) {
result = libab_register_basetype(ab, "num", &ab->basetype_num);
}
if (result == LIBAB_SUCCESS) {
result = libab_register_basetype(ab, "function", &_basetype_function);
}
if (result == LIBAB_SUCCESS) {
result = libab_register_basetype(ab, "function_list",
&_basetype_function_list);
}
if(result != LIBAB_SUCCESS) {
libab_ref_free(&ab->type_num);
libab_ref_free(&ab->type_function_list);
libab_ref_null(&ab->type_num);
libab_ref_null(&ab->type_function_list);
}
return result;
}
libab_result libab_create_type(libab* ab, libab_ref* into, const char* type) {
libab_result result;
ll tokens;
ll_init(&tokens);
result = libab_lexer_lex(&ab->lexer, type, &tokens);
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if (result == LIBAB_SUCCESS) {
result = libab_parser_parse_type(&ab->parser, &tokens, type, into);
}
ll_foreach(&tokens, NULL, compare_always, libab_lexer_foreach_match_free);
ll_free(&tokens);
return result;
}
libab_result libab_free(libab* ab) {
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libab_ref_free(&ab->table);
libab_ref_free(&ab->type_num);
libab_ref_free(&ab->type_function_list);
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libab_parser_free(&ab->parser);
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libab_interpreter_free(&ab->intr);
return libab_lexer_free(&ab->lexer);
}