libabacus/src/libabacus.c

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#include "libabacus.h"
#include <stdlib.h>
#include "util.h"
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#include "reserved.h"
libab_result libab_init(libab* ab) {
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libab_result result;
libab_table_init(&ab->table);
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libab_parser_init(&ab->parser, &ab->table);
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result = libab_lexer_init(&ab->lexer);
if(result == LIBAB_SUCCESS) {
result = libab_register_reserved_operators(&ab->lexer);
}
if(result != LIBAB_SUCCESS) {
libab_table_free(&ab->table);
libab_parser_free(&ab->parser);
libab_lexer_free(&ab->lexer);
}
return result;
}
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void _sanitize(char* to, const char* from, size_t buffer_size) {
size_t index = 0;
while(*from && index < (buffer_size - 2)) {
if(*from == '+' || *from == '*' || *from == '\\') to[index++] = '\\';
to[index++] = *(from++);
}
to[index] = '\0';
}
libab_result _initialize_behavior(libab* ab, libab_behavior* behavior,
const char* type, libab_function_ptr func) {
libab_result result = LIBAB_SUCCESS;
ll tokens;
ll_init(&tokens);
behavior->impl.variant = BIMPL_INTERNAL;
behavior->impl.data_u.internal = func;
result = libab_lexer_lex(&ab->lexer, type, &tokens);
if(result == LIBAB_SUCCESS) {
result = libab_parser_parse_type(&ab->parser, &tokens, type, &behavior->type);
}
ll_foreach(&tokens, NULL, compare_always, libab_lexer_foreach_match_free);
ll_free(&tokens);
return result;
}
libab_result _register_operator(libab* ab, const char* op, libab_operator_variant token_type, int precedence, int associativity, const char* type, libab_function_ptr func) {
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char op_buffer[8];
libab_result result = LIBAB_SUCCESS;
libab_table_entry* new_entry;
if((new_entry = malloc(sizeof(*new_entry)))) {
new_entry->variant = ENTRY_OP;
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libab_ref_null(&new_entry->data_u.op.behavior.type);
new_entry->data_u.op.precedence = precedence;
new_entry->data_u.op.associativity = associativity;
new_entry->data_u.op.type = token_type;
} else {
result = LIBAB_MALLOC;
}
if(result == LIBAB_SUCCESS) {
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libab_ref_free(&new_entry->data_u.op.behavior.type);
result = _initialize_behavior(ab, &(new_entry->data_u.op.behavior), type, func);
}
if(result == LIBAB_SUCCESS) {
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_sanitize(op_buffer, op, 8);
result = libab_convert_lex_result(eval_config_add(&ab->lexer.config, op_buffer, TOKEN_OP));
}
if(result == LIBAB_SUCCESS) {
result = libab_table_put(&ab->table, op, new_entry);
}
if(result != LIBAB_SUCCESS) {
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if(new_entry)
libab_ref_free(&new_entry->data_u.op.behavior.type);
eval_config_remove(&ab->lexer.config, op, TOKEN_OP);
free(new_entry);
}
return result;
}
libab_result libab_register_operator_infix(libab* ab, const char* op, int precedence, int associativity, const char* type, libab_function_ptr func) {
return _register_operator(ab, op, OPERATOR_INFIX, precedence, associativity, type, func);
}
libab_result libab_register_operator_prefix(libab* ab, const char* op, const char* type, libab_function_ptr func) {
return _register_operator(ab, op, OPERATOR_PREFIX, 0, 0, type, func);
}
libab_result libab_register_operator_postfix(libab* ab, const char* op, const char* type, libab_function_ptr func) {
return _register_operator(ab, op, OPERATOR_POSTFIX, 0, 0, type, func);
}
libab_result libab_register_function(libab* ab, const char* name, const char* type, libab_function_ptr func) {
libab_result result = LIBAB_SUCCESS;
libab_table_entry* new_entry;
if((new_entry = malloc(sizeof(*new_entry)))) {
new_entry->variant = ENTRY_FUN;
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libab_ref_null(&new_entry->data_u.function.behavior.type);
} else {
result = LIBAB_MALLOC;
}
if(result == LIBAB_SUCCESS) {
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libab_ref_free(&new_entry->data_u.function.behavior.type);
result = _initialize_behavior(ab,
&(new_entry->data_u.function.behavior), type, func);
}
if(result == LIBAB_SUCCESS) {
result = libab_table_put(&ab->table, name, new_entry);
}
if(result != LIBAB_SUCCESS) {
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if(new_entry)
libab_ref_free(&new_entry->data_u.function.behavior.type);
free(new_entry);
}
return result;
}
libab_result libab_register_basetype(libab* ab, const char* name, libab_basetype* basetype) {
libab_result result = LIBAB_SUCCESS;
libab_table_entry* new_entry;
if((new_entry = malloc(sizeof(*new_entry)))) {
new_entry->variant = ENTRY_BASETYPE;
new_entry->data_u.basetype = basetype;
}
if(result == LIBAB_SUCCESS) {
result = libab_table_put(&ab->table, name, new_entry);
}
if(result != LIBAB_SUCCESS) {
free(new_entry);
}
return result;
}
libab_result libab_free(libab* ab) {
libab_table_free(&ab->table);
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libab_parser_free(&ab->parser);
return libab_lexer_free(&ab->lexer);
}