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#include "cccl.h"
#include "types.h"
#include <cvector/cvector.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "operation.h"
#include "platform/getch.h"
#include "utils.h"
static cccl pc = {0};
static const s8 *const name_allowed = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
static const s8 *const name_allowed_ = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_";
static const s8 *const all_allowed = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_{}[]()?;@=!&$%<>^+-*~#:/ \n\t";
static const s8 *const skippable = " \t\n";
static const s8 *const open_brackets = "[({?";
static const s8 *const close_brackets = "])};";
static void cccl_varpair_free(void *p)
{
cvector_free(*(cccl_varpair **)p);
}
void cccl_init(s8 *filename)
{
memset(&pc, 0, sizeof(pc));
cvector_init(pc.stack, 1, NULL);
cvector_init(pc.variables, 1, NULL);
cvector_init(pc.procedures, 1, NULL);
cvector_init(pc.lv_stack, 1, cccl_varpair_free);
cvector_init(pc.ep_stack, 1, NULL);
if (errno) die(1, strerror(errno));
pc.filename = filename;
cccl_operation_init(&pc);
}
void cccl_free()
{
cvector_free(pc.stack);
cvector_free(pc.variables);
cvector_free(pc.procedures);
cvector_free(pc.lv_stack);
cvector_free(pc.ep_stack);
free(pc.code);
}
void cccl_read(void)
{
s8 chr;
FILE *file = fopen(pc.filename, "r");
if (errno) die(1, strerror(errno));
fseek(file, 0, SEEK_END);
pc.size = ftell(file);
fseek(file, 0, SEEK_SET);
pc.code = calloc(pc.size + 1, sizeof(s8));
for (u32 i = 0; i < pc.size; ++i)
{
if ((chr = fgetc(file)) == EOF)
{
if (errno)
{
fclose(file);
die(1, strerror(errno));
}
else
{
break;
}
}
pc.code[i] = chr;
}
fclose(file);
}
static void check_symbol(void)
{
if (!strchr(all_allowed, pc.code[pc.ep]))
die(1, "illegal character (%u at %d)", pc.code[pc.ep], pc.ep);
}
static void require_stack_size(u32 size, i32 start)
{
if (cvector_size(pc.stack) < size)
die(1, "stack size is %d, but %d is required (%c at %d)", cvector_size(pc.stack), size, pc.code[start], start);
}
static i32 require_variable_local(s8 name)
{
if (cvector_size(pc.lv_stack) > 0)
for (i32 i = 0; i < cvector_size(pc.lv_stack[cvector_size(pc.lv_stack) - 1]); ++i)
if (pc.lv_stack[cvector_size(pc.lv_stack) - 1][i].name == name)
return i;
return -1;
}
static i32 require_variable(s8 name)
{
for (i32 i = 0; i < cvector_size(pc.variables); ++i)
if (pc.variables[i].name == name)
return i;
return -1;
}
static i32 require_procedure(s8 name)
{
for (i32 i = 0; i < cvector_size(pc.procedures); ++i)
if (pc.procedures[i].name == name)
return i;
return -1;
}
static i32 find_bracket(i32 start)
{
i32 start_length = cvector_size(pc.br_stack);
cccl_brpair brpair;
for (i32 pointer = pc.ep+1; pointer < pc.size; ++pointer)
{
check_symbol();
if (strchr(skippable, pc.code[pointer])) continue;
else if (strchr(open_brackets, pc.code[pointer]))
{
brpair = (cccl_brpair){.pointer=pointer, .bracket=close_brackets[strchr(open_brackets, pc.code[pointer]) - open_brackets]};
cvector_push_back(pc.br_stack, brpair);
}
else if (strchr(close_brackets, pc.code[pointer]))
{
if (pc.code[pointer] != pc.br_stack[cvector_size(pc.br_stack) - 1].bracket)
die(1, "invalid bracket (%c at %d for %c at %d)", pc.code[pointer], pointer, pc.code[pc.br_stack[cvector_size(pc.br_stack) - 1].pointer], pc.br_stack[cvector_size(pc.br_stack) - 1].pointer);
cvector_pop_back(pc.br_stack);
}
if (cvector_size(pc.br_stack) < start_length) return pointer;
}
die(1, "unclosed bracket (%c at %d)", pc.code[start], start);
}
static s8 read_operand(bool allow_underscore)
{
i32 start = pc.ep;
for (++pc.ep; pc.ep < pc.size; ++pc.ep)
{
check_symbol();
if (strchr(skippable, pc.code[pc.ep])) continue;
if (!strchr(allow_underscore ? name_allowed_ : name_allowed, pc.code[pc.ep]))
die(1, "invalid operand name (%c at %d for %c at %d)", pc.code[pc.ep], pc.ep, pc.code[start], start);
return pc.code[pc.ep];
}
die(1, "no operand (for %c at %d)", pc.code[start], start);
}
void cccl_run(void)
{
i32 variable, start, var, bracket;
cccl_varpair varpair;
cccl_pointer pointer;
cccl_brpair brpair;
s8 operand;
bool is_comment;
for (pc.ep = 0; pc.ep < pc.size; ++pc.ep)
{
if (is_comment && pc.code[pc.ep] == '\n')
is_comment = false;
else if (is_comment)
continue;
check_symbol();
start = pc.ep;
switch (pc.code[pc.ep])
{
case ' ':
case '\t':
case ';':
break;
case '/':
is_comment = true;
break;
case '^':
cvector_push_back(pc.stack, 0);
break;
case '+':
require_stack_size(1, pc.ep);
++pc.stack[cvector_size(pc.stack) - 1];
break;
case '-':
require_stack_size(1, pc.ep);
--pc.stack[cvector_size(pc.stack) - 1];
break;
case '*':
require_stack_size(2, pc.ep);
pc.stack[cvector_size(pc.stack) - 2] += pc.stack[cvector_size(pc.stack) - 1];
cvector_pop_back(pc.stack);
break;
case '~':
require_stack_size(2, pc.ep);
pc.stack[cvector_size(pc.stack) - 2] -= pc.stack[cvector_size(pc.stack) - 1];
cvector_pop_back(pc.stack);
break;
case '%':
operand = read_operand(true);
i16 *to_reverse = NULL;
i32 size;
if (operand == '_')
{
size = cvector_size(pc.stack);
}
else
{
if ((var = require_variable_local(operand)) == -1)
{
if ((var = require_variable(operand)) == -1)
die(1, "no %c variable found (%% at %d)", operand, start);
else
size = pc.lv_stack[cvector_size(pc.lv_stack) - 1][var].value;
} else
{
size = pc.variables[var].value;
}
}
if (size < 1)
die(1, "invalid argument %d, should be not less than 1 (%% at %d)", size, start);
require_stack_size(size, start);
cvector_init(to_reverse, size, NULL);
for (int i = 0; i < size; ++i)
{
cvector_push_back(to_reverse, pc.stack[cvector_size(pc.stack) - 1]);
cvector_pop_back(pc.stack);
}
for (int i = 0; i < size; ++i)
cvector_push_back(pc.stack, to_reverse[i]);
cvector_free(to_reverse);
break;
case '=':
operand = read_operand(true);
require_stack_size(1, start);
varpair = (cccl_varpair){.name=operand, .value=pc.stack[cvector_size(pc.stack) - 1]};
if (operand != '_')
{
if ((var = require_variable_local(operand)) == -1)
if ((var = require_variable(operand)) == -1)
cvector_push_back(pc.variables, varpair);
else
pc.variables[var] = varpair;
else
pc.lv_stack[cvector_size(pc.lv_stack) - 1][var] = varpair;
}
cvector_pop_back(pc.stack);
break;
case '!':
operand = read_operand(false);
if ((var = require_variable_local(operand)) == -1)
if ((var = require_variable(operand)) == -1)
die(1, "no %c variable found (! at %d)", operand, start);
else
cvector_erase(pc.variables, var);
else
cvector_erase(pc.lv_stack[cvector_size(pc.lv_stack) - 1], var);
break;
case '$':
operand = read_operand(false);
i16 value;
if ((var = require_variable_local(operand)) == -1)
if ((var = require_variable(operand)) == -1)
die(1, "no %c variable found ($ at %d)", operand, start);
else
value = pc.variables[var].value;
else
value = pc.lv_stack[cvector_size(pc.lv_stack) - 1][var].value;
cvector_push_back(pc.stack, value);
break;
case '&':
operand = read_operand(false);
if (cvector_size(pc.lv_stack) == 0)
die(1, "local variables cannot be created in global scope (& at %d)", start);
varpair = (cccl_varpair){.name=operand, .value=0};
if (require_variable_local(operand) == -1)
cvector_push_back(pc.lv_stack[cvector_size(pc.lv_stack) - 1], varpair);
break;
case '<':
operand = read_operand(false);
if ((var = require_variable_local(operand)) == -1)
if ((var = require_variable(operand)) == -1)
die(1, "no %c variable found (< at %d)", operand, start);
else
printf("%c", pc.variables[var].value);
else
printf("%c", pc.lv_stack[cvector_size(pc.lv_stack) - 1][var].value);
break;
case '>':
operand = read_operand(false);
i16 *to_store;
if ((var = require_variable_local(operand)) == -1)
if ((var = require_variable(operand)) == -1)
die(1, "no %c variable found (> at %d)", operand, start);
else
to_store = &pc.variables[var].value;
else
to_store = &pc.lv_stack[cvector_size(pc.lv_stack) - 1][var].value;
*to_store = getch();
break;
case '@':
operand = read_operand(false);
if ((var = require_procedure(operand)) == -1)
die(1, "no %c procedure found (@ at %d)", operand, start);
pointer = (cccl_pointer){.value=pc.ep, .meta=0};
cvector_push_back(pc.ep_stack, pointer);
pc.ep = pc.procedures[var].value;
break;
case '#':
if (cvector_size(pc.lv_stack) == 0)
exit(0);
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 1].value;
if (pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta != -1)
cvector_pop_back(pc.ep_stack);
cvector_pop_back(pc.ep_stack);
break;
case ':':
if (pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta == -1)
{
die(1, "not in a loop (: at %d)", start);
} else if (pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta == 0)
{
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 1].value;
cvector_pop_back(pc.ep_stack);
cvector_pop_back(pc.ep_stack);
} else
{
if (pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta > 0)
--pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta;
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 2].value;
}
break;
case '}':
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 1].value;
cvector_pop_back(pc.ep_stack);
break;
case ')':
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 2].value;
break;
case ']':
if (pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta == 0)
{
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 1].value;
cvector_pop_back(pc.ep_stack);
cvector_pop_back(pc.ep_stack);
} else
{
--pc.ep_stack[cvector_size(pc.ep_stack) - 1].meta;
pc.ep = pc.ep_stack[cvector_size(pc.ep_stack) - 2].value;
}
break;
case '(':
pointer = (cccl_pointer){.value=start, .meta=-2};
brpair = (cccl_brpair){.pointer=start, .bracket=')'};
cvector_push_back(pc.br_stack, brpair);
bracket = find_bracket(start);
cvector_push_back(pc.ep_stack, pointer);
pointer.value = bracket;
cvector_push_back(pc.ep_stack, pointer);
break;
case '?':
operand = read_operand(false);
if ((var = require_variable_local(operand)) == -1)
if ((var = require_variable(operand)) == -1)
die(1, "no %c variable found (? at %d)", operand, start);
else
var = pc.variables[var].value;
else
var = pc.lv_stack[cvector_size(pc.lv_stack) - 1][var].value;
if (var != pc.stack[cvector_size(pc.stack) - 1])
{
brpair = (cccl_brpair){.pointer=start, .bracket='?'};
cvector_push_back(pc.br_stack, brpair);
bracket = find_bracket(start);
pc.ep = bracket;
}
break;
}
}
printf("Stack: ^^^\n");
for (int i = 0; i < cvector_size(pc.stack); ++i)
printf("%d\n", pc.stack[i]);
printf("Variables:\n");
for (int i = 0; i < cvector_size(pc.variables); ++i)
printf("%c:%d\n", pc.variables[i].name, pc.variables[i].value);
printf("Call stack:\n");
for (int i = 0; i < cvector_size(pc.ep_stack); ++i)
printf("%d(%d)", pc.ep_stack[i].value, pc.ep_stack[i].meta);
}
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