Implementation of Unlambda, an esoteric programming language.
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/*
* dump.c - dump utility
*
* Copyright (C) 2020 CismonX <admin@cismon.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "common.h"
#include "dump.h"
#include "mnemonic.h"
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <arpa/inet.h>
#define D_INC data[idx + __COUNTER__]
#define D_INC_DUP_4 D_INC, D_INC, D_INC, D_INC
#define D_INC_DUP_16 D_INC_DUP_4, D_INC_DUP_4, D_INC_DUP_4, D_INC_DUP_4
#define F_2B_DUP_2 "%02x%02x %02x%02x "
#define F_2B_DUP_8 F_2B_DUP_2 F_2B_DUP_2 F_2B_DUP_2 F_2B_DUP_2
#define fprintf_check(os, format, ...) \
if (fprintf(os, format, __VA_ARGS__) < 0) { \
return false; \
}
static inline bool
write_mnemonic_ins(FILE* restrict output_stream, uint32_t offset, struct u6a_vm_ins ins) {
fprintf_check(output_stream, "%08x: ", offset);
const char* op = u6a_mnemonic_op(ins.opcode);
if (ins.opcode & U6A_VM_OP_EXTENTED) {
const char* op_ex = u6a_mnemonic_op_ex(ins.opcode_ex);
int op_len = strlen(op);
fprintf_check(output_stream, "%-*s<%-5s>%-*s", op_len, op, op_ex, 3 - op_len, "");
} else {
fprintf_check(output_stream, "%-10s", op);
}
if (ins.opcode & U6A_VM_OP_OFFSET) {
fprintf_check(output_stream, " 0x%08x\n", ntohl(ins.operand.offset));
} else if (ins.opcode == u6a_vo_app) {
const char* fn_1 = u6a_mnemonic_fn(ins.operand.fn.first.fn);
int fn_1_len = strlen(fn_1);
if (ins.operand.fn.first.fn & U6A_VM_FN_CHAR) {
const char* ch_1 = u6a_mnemonic_ch(ins.operand.fn.first.ch);
int fn_ch_1_len = fn_1_len + strlen(ch_1);
fprintf_check(output_stream, " %-*s%s,%-*s", fn_1_len, fn_1, ch_1, 5 - fn_ch_1_len, "");
} else {
fprintf_check(output_stream, " %-*s,%-*s", fn_1_len, fn_1, 5 - fn_1_len, "");
}
const char* fn_2 = u6a_mnemonic_fn(ins.operand.fn.second.fn);
if (ins.operand.fn.second.fn & U6A_VM_FN_CHAR) {
const char* ch_2 = u6a_mnemonic_ch(ins.operand.fn.second.ch);
int fn_2_len = strlen(fn_2);
fprintf_check(output_stream, " %-*s%-4s\n", fn_2_len, fn_2, ch_2);
} else {
fprintf_check(output_stream, " %s\n", fn_2);
}
} else {
fprintf_check(output_stream, " %c", '\n');
}
return true;
}
static inline bool
u6a_hexdump(FILE* restrict output_stream, const char* data, const char* formatted, uint32_t length) {
static const char* format = "%08x: " F_2B_DUP_8 " %.16s\n";
for (uint32_t idx = 0; idx < length; idx += U6A_HEXDUMP_BYTES_PER_LINE) {
uint32_t remaining = length - idx;
if (UNLIKELY(remaining < U6A_HEXDUMP_BYTES_PER_LINE)) {
fprintf_check(output_stream, "%08x: ", idx);
for (; idx < length - 1; idx += 2) {
fprintf_check(output_stream, "%02x%02x ", data[idx], data[idx + 1]);
}
if (idx == length - 1) {
fprintf_check(output_stream, "%02x ", data[idx]);
}
int blanks = (U6A_HEXDUMP_BYTES_PER_LINE - remaining) / 2 * 5;
fprintf_check(output_stream, " %*s%.*s\n", blanks, "", remaining, formatted + length - remaining);
} else {
fprintf_check(output_stream, format, idx, D_INC_DUP_16, formatted + idx);
}
}
return true;
}
bool
u6a_dump_mnemonics(FILE* restrict output_stream, struct u6a_vm_ins* data, uint32_t length) {
fprintf_check(output_stream, "%s\n", ".text");
for (uint32_t idx = 0; idx < length; ++idx) {
if (UNLIKELY(!write_mnemonic_ins(output_stream, idx, data[idx]))) {
return false;
}
}
fprintf_check(output_stream, "%c", '\n');
return true;
}
bool
u6a_dump_data(FILE* restrict output_stream, const char* data, uint32_t length) {
fprintf_check(output_stream, "%s\n", ".rodata");
char* formatted_data = malloc(length);
for (uint32_t idx = 0; idx < length; ++idx) {
formatted_data[idx] = isprint(data[idx]) ? data[idx] : '.';
}
bool result = u6a_hexdump(output_stream, data, formatted_data, length);
free(formatted_data);
return result;
}