fumiama/base16384
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chore: optimize documents

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源文雨
2024-04-06 20:55:39 +09:00
parent 4ff107e46f
commit 5defe71ba9
3 changed files with 31 additions and 28 deletions
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22
base1432.c
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@@ -30,7 +30,7 @@ typedef union {
int base16384_encode_safe(const char* data, int dlen, char* buf) {
int outlen = dlen / 7 * 8;
int offset = dlen % 7;
switch(offset) { // 算上偏移标志字符占用的2字节
switch(offset) { // also count 0x3dxx
case 0: break;
case 1: outlen += 4; break;
case 2:
@@ -127,7 +127,7 @@ int base16384_encode_safe(const char* data, int dlen, char* buf) {
int base16384_encode(const char* data, int dlen, char* buf) {
int outlen = dlen / 7 * 8;
int offset = dlen % 7;
switch(offset) { // 算上偏移标志字符占用的2字节
switch(offset) { // also count 0x3dxx
case 0: break;
case 1: outlen += 4; break;
case 2:
@@ -202,7 +202,7 @@ int base16384_encode(const char* data, int dlen, char* buf) {
int base16384_encode_unsafe(const char* data, int dlen, char* buf) {
int outlen = dlen / 7 * 8;
int offset = dlen % 7;
switch(offset) { // 算上偏移标志字符占用的2字节
switch(offset) { // also count 0x3dxx
case 0: break;
case 1: outlen += 4; break;
case 2:
@@ -244,7 +244,7 @@ int base16384_decode_safe(const char* data, int dlen, char* buf) {
int offset = 0;
if(data[dlen-2] == '=') {
offset = data[dlen-1];
switch(offset) { // 算上偏移标志字符占用的2字节
switch(offset) { // also count 0x3dxx
case 0: break;
case 1: outlen -= 4; break;
case 2:
@@ -259,7 +259,7 @@ int base16384_decode_safe(const char* data, int dlen, char* buf) {
const uint32_t* vals = (const uint32_t*)data;
uint32_t n = 0;
int32_t i = 0;
for(; i < outlen - 7; i+=7) { // n实际每次自增2
for(; i < outlen - 7; i+=7) { // n += 2 in one loop
register uint32_t sum = 0;
register uint32_t shift = htobe32(vals[n++]) - 0x4e004e00;
shift <<= 2;
@@ -341,7 +341,7 @@ int base16384_decode(const char* data, int dlen, char* buf) {
int offset = 0;
if(data[dlen-2] == '=') {
offset = data[dlen-1];
switch(offset) { // 算上偏移标志字符占用的2字节
switch(offset) { // also count 0x3dxx
case 0: break;
case 1: outlen -= 4; break;
case 2:
@@ -356,7 +356,7 @@ int base16384_decode(const char* data, int dlen, char* buf) {
const uint32_t* vals = (const uint32_t*)data;
uint32_t n = 0;
int32_t i = 0;
for(; i <= outlen - 7; i+=7) { // n实际每次自增2
for(; i <= outlen - 7; i+=7) { // n += 2 in one loop
register uint32_t sum = 0;
register uint32_t shift = htobe32(vals[n++]) - 0x4e004e00;
shift <<= 2;
@@ -375,7 +375,7 @@ int base16384_decode(const char* data, int dlen, char* buf) {
}
if(*(uint8_t*)(&vals[n]) == '=') return outlen;
if(offset--) {
// 这里有读取越界
// here comes a read overlap
#ifdef WORDS_BIGENDIAN
register uint32_t sum = __builtin_bswap32(vals[n++]);
#else
@@ -391,7 +391,7 @@ int base16384_decode(const char* data, int dlen, char* buf) {
if(offset--) {
buf[i] = (sum & 0x0f000000) >> 20;
if(*(uint8_t*)(&vals[n]) == '=') return outlen;
// 这里有读取越界
// here comes a read overlap
#ifdef WORDS_BIGENDIAN
sum = __builtin_bswap32(vals[n]);
#else
@@ -418,7 +418,7 @@ int base16384_decode_unsafe(const char* data, int dlen, char* buf) {
int offset = 0;
if(data[dlen-2] == '=') {
offset = data[dlen-1];
switch(offset) { // 算上偏移标志字符占用的2字节
switch(offset) { // also count 0x3dxx
case 0: break;
case 1: outlen -= 4; break;
case 2:
@@ -433,7 +433,7 @@ int base16384_decode_unsafe(const char* data, int dlen, char* buf) {
const uint32_t* vals = (const uint32_t*)data;
uint32_t n = 0;
int32_t i = 0;
for(; i < outlen-7; i+=7) { // n实际每次自增2
for(; i < outlen-7; i+=7) { // n += 2 in one loop
register uint32_t sum = 0;
register uint32_t shift = htobe32(vals[n++]) - 0x4e004e00;
shift <<= 2;