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#include "ctx.h"
#include "function.h"
#include "syntax.h"
static lsp_bool_t contains_symbol(lsp_mem_t *m, lsp_addr_t ctx,
lsp_addr_t symbol) {
while (ctx != m->nil) {
lsp_addr_t entry = lsp_mem_get_pair_first(m, ctx);
lsp_addr_t entry_symbol = lsp_mem_get_pair_first(m, entry);
if (lsp_mem_eq(m, entry_symbol, symbol))
return true;
ctx = lsp_mem_get_pair_second(m, ctx);
}
return false;
}
static lsp_status_t remove_symbol(lsp_mem_t *m, lsp_addr_t ctx,
lsp_addr_t symbol) {
lsp_addr_t list = lsp_mem_get_pair_first(m, ctx);
lsp_addr_t result = m->nil;
lsp_addr_t result_last = m->nil;
lsp_status_t status = LSP_SUCCESS;
while (list != m->nil) {
lsp_addr_t entry = lsp_mem_get_pair_first(m, list);
lsp_addr_t entry_symbol = lsp_mem_get_pair_first(m, entry);
list = lsp_mem_get_pair_second(m, list);
if (lsp_mem_eq(m, entry_symbol, symbol)) {
if (result == m->nil) {
result = list;
status = lsp_mem_inc_ref(m, list);
} else {
lsp_mem_set_pair_second(m, result_last, list);
}
break;
}
lsp_addr_t new_result_last;
status = lsp_mem_create_pair(m, entry, m->nil, &new_result_last);
if (status != LSP_SUCCESS)
break;
if (result == m->nil) {
result = new_result_last;
} else {
lsp_mem_set_pair_second(m, result_last, new_result_last);
lsp_mem_dec_ref(m, new_result_last);
}
result_last = new_result_last;
}
if (status == LSP_SUCCESS)
lsp_mem_set_pair_first(m, ctx, result);
lsp_mem_dec_ref(m, result);
return status;
}
lsp_status_t lsp_ctx_create(lsp_mem_t *m, lsp_addr_t *ctx) {
lsp_addr_t list = m->nil;
lsp_addr_t list_last = m->nil;
lsp_status_t status = LSP_SUCCESS;
for (uint8_t i = 0; status == LSP_SUCCESS && lsp_syntaxes[i].name; ++i) {
lsp_addr_t symbol;
status =
lsp_mem_create_symbol_from_char(m, lsp_syntaxes[i].name, &symbol);
if (status != LSP_SUCCESS)
break;
lsp_addr_t value;
status = lsp_mem_create_builtin_syntax(m, i, &value);
if (status != LSP_SUCCESS) {
lsp_mem_dec_ref(m, symbol);
break;
}
lsp_addr_t entry;
status = lsp_mem_create_pair(m, symbol, value, &entry);
lsp_mem_dec_ref(m, symbol);
lsp_mem_dec_ref(m, value);
if (status != LSP_SUCCESS)
break;
lsp_addr_t new_list_last;
status = lsp_mem_create_pair(m, entry, m->nil, &new_list_last);
lsp_mem_dec_ref(m, entry);
if (status != LSP_SUCCESS)
break;
if (list == m->nil) {
list = new_list_last;
} else {
lsp_mem_set_pair_second(m, list_last, new_list_last);
lsp_mem_dec_ref(m, new_list_last);
}
list_last = new_list_last;
}
for (uint8_t i = 0; status == LSP_SUCCESS && lsp_functions[i].name; ++i) {
lsp_addr_t symbol;
status =
lsp_mem_create_symbol_from_char(m, lsp_functions[i].name, &symbol);
if (status != LSP_SUCCESS)
break;
lsp_addr_t value;
status = lsp_mem_create_builtin_function(m, i, &value);
if (status != LSP_SUCCESS) {
lsp_mem_dec_ref(m, symbol);
break;
}
lsp_addr_t entry;
status = lsp_mem_create_pair(m, symbol, value, &entry);
lsp_mem_dec_ref(m, symbol);
lsp_mem_dec_ref(m, value);
if (status != LSP_SUCCESS)
break;
lsp_addr_t new_list_last;
status = lsp_mem_create_pair(m, entry, m->nil, &new_list_last);
lsp_mem_dec_ref(m, entry);
if (status != LSP_SUCCESS)
break;
if (list == m->nil) {
list = new_list_last;
} else {
lsp_mem_set_pair_second(m, list_last, new_list_last);
lsp_mem_dec_ref(m, new_list_last);
}
list_last = new_list_last;
}
if (status == LSP_SUCCESS)
status = lsp_mem_create_pair(m, list, m->nil, ctx);
lsp_mem_dec_ref(m, list);
return status;
}
lsp_status_t lsp_ctx_copy(lsp_mem_t *m, lsp_addr_t ctx, lsp_addr_t *result) {
lsp_addr_t list = lsp_mem_get_pair_first(m, ctx);
return lsp_mem_create_pair(m, list, m->nil, result);
}
lsp_status_t lsp_ctx_add(lsp_mem_t *m, lsp_addr_t ctx, lsp_addr_t symbol,
lsp_addr_t value) {
lsp_status_t status;
if (contains_symbol(m, ctx, symbol)) {
status = remove_symbol(m, ctx, symbol);
if (status != LSP_SUCCESS)
return status;
}
lsp_addr_t list = lsp_mem_get_pair_first(m, ctx);
lsp_addr_t entry;
status = lsp_mem_create_pair(m, symbol, value, &entry);
if (status != LSP_SUCCESS)
return status;
status = lsp_mem_create_pair(m, entry, list, &list);
lsp_mem_dec_ref(m, entry);
if (status != LSP_SUCCESS)
return status;
lsp_mem_set_pair_first(m, ctx, list);
lsp_mem_dec_ref(m, list);
return LSP_SUCCESS;
}
lsp_status_t lsp_ctx_set(lsp_mem_t *m, lsp_addr_t ctx, lsp_addr_t symbol,
lsp_addr_t value) {
lsp_addr_t list = lsp_mem_get_pair_first(m, ctx);
while (list != m->nil) {
lsp_addr_t entry = lsp_mem_get_pair_first(m, list);
lsp_addr_t entry_symbol = lsp_mem_get_pair_first(m, entry);
if (lsp_mem_eq(m, symbol, entry_symbol)) {
lsp_mem_set_pair_second(m, entry, value);
return LSP_SUCCESS;
}
list = lsp_mem_get_pair_second(m, list);
}
return LSP_ERR_CTX;
}
lsp_status_t lsp_ctx_get(lsp_mem_t *m, lsp_addr_t ctx, lsp_addr_t symbol,
lsp_addr_t *value) {
lsp_addr_t list = lsp_mem_get_pair_first(m, ctx);
while (list != m->nil) {
lsp_addr_t entry = lsp_mem_get_pair_first(m, list);
lsp_addr_t entry_symbol = lsp_mem_get_pair_first(m, entry);
if (lsp_mem_eq(m, symbol, entry_symbol)) {
*value = lsp_mem_get_pair_second(m, entry);
return lsp_mem_inc_ref(m, *value);
}
list = lsp_mem_get_pair_second(m, list);
}
return LSP_ERR_CTX;
}
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