summaryrefslogtreecommitdiff
path: root/src/base64.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/base64.cpp')
-rw-r--r--src/base64.cpp143
1 files changed, 64 insertions, 79 deletions
diff --git a/src/base64.cpp b/src/base64.cpp
index 259288757b..001a467899 100644
--- a/src/base64.cpp
+++ b/src/base64.cpp
@@ -1,81 +1,67 @@
#include <base64.hpp>
#include <cassert>
-namespace base64
-{
-bool base64_encode(const gsl::cstring_span<> &input, std::string &output)
-{
- static const char encoding_data[] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
- unsigned int input_length = input.size();
-
- // allocate space for output string
- output.clear();
- output.reserve(((input_length + 2) / 3) * 4);
-
- // for each 3-bytes sequence from the input, extract 4 6-bits sequences and
- // encode using
- // encoding_data lookup table.
- // if input do not contains enough chars to complete 3-byte sequence,use pad
- // char '='
- for (unsigned int i = 0; i < input_length; i++) {
- int base64code0 = 0;
- int base64code1 = 0;
- int base64code2 = 0;
- int base64code3 = 0;
-
- base64code0 = (input[i] >> 2) & 0x3f; // 1-byte 6 bits
- output += encoding_data[base64code0];
- base64code1 = (input[i] << 4) & 0x3f; // 1-byte 2 bits +
-
- if (++i < input_length) {
- base64code1 |= (input[i] >> 4) & 0x0f; // 2-byte 4 bits
- output += encoding_data[base64code1];
- base64code2 = (input[i] << 2) & 0x3f; // 2-byte 4 bits +
-
- if (++i < input_length) {
- base64code2 |= (input[i] >> 6) & 0x03; // 3-byte 2 bits
- base64code3 = input[i] & 0x3f; // 3-byte 6 bits
- output += encoding_data[base64code2];
- output += encoding_data[base64code3];
- } else {
- output += encoding_data[base64code2];
- output += '=';
- }
- } else {
- output += encoding_data[base64code1];
- output += '=';
- output += '=';
- }
+namespace base64 {
+bool base64_encode(const gsl::cstring_span<> &input, std::string &output) {
+ static const char encoding_data[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+ unsigned int input_length = input.size();
+
+ // allocate space for output string
+ output.clear();
+ output.reserve(((input_length + 2) / 3) * 4);
+
+ // for each 3-bytes sequence from the input, extract 4 6-bits sequences and
+ // encode using
+ // encoding_data lookup table.
+ // if input do not contains enough chars to complete 3-byte sequence,use pad
+ // char '='
+ for (unsigned int i = 0; i < input_length; i++) {
+ int base64code0 = 0;
+ int base64code1 = 0;
+ int base64code2 = 0;
+ int base64code3 = 0;
+
+ base64code0 = (input[i] >> 2) & 0x3f; // 1-byte 6 bits
+ output += encoding_data[base64code0];
+ base64code1 = (input[i] << 4) & 0x3f; // 1-byte 2 bits +
+
+ if (++i < input_length) {
+ base64code1 |= (input[i] >> 4) & 0x0f; // 2-byte 4 bits
+ output += encoding_data[base64code1];
+ base64code2 = (input[i] << 2) & 0x3f; // 2-byte 4 bits +
+
+ if (++i < input_length) {
+ base64code2 |= (input[i] >> 6) & 0x03; // 3-byte 2 bits
+ base64code3 = input[i] & 0x3f; // 3-byte 6 bits
+ output += encoding_data[base64code2];
+ output += encoding_data[base64code3];
+ } else {
+ output += encoding_data[base64code2];
+ output += '=';
+ }
+ } else {
+ output += encoding_data[base64code1];
+ output += '=';
+ output += '=';
}
+ }
- return true;
+ return true;
}
-
-bool base64_decode(const gsl::cstring_span<> &input, std::string &output)
-{
+bool base64_decode(const gsl::cstring_span<> &input, std::string &output) {
static const char nop = -1;
static const char decoding_data[] = {
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, 62, nop,
- nop, nop, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, nop, nop,
- nop, nop, nop, nop, nop, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
- 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
- 25, nop, nop, nop, nop, nop, nop, 26, 27, 28, 29, 30, 31, 32, 33,
- 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
- 49, 50, 51, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
- nop};
+ nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
+ nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, 62, nop, nop, nop, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
+ nop, nop, nop, nop, nop, nop, nop, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
+ 22, 23, 24, 25, nop, nop, nop, nop, nop, nop, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44,
+ 45, 46, 47, 48, 49, 50, 51, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
+ nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
+ nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
+ nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop,
+ nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop, nop};
unsigned int input_length = input.size();
@@ -90,29 +76,29 @@ bool base64_decode(const gsl::cstring_span<> &input, std::string &output)
for (unsigned int i = 0; i < input_length; i++) {
char base64code0;
char base64code1;
- char base64code2 = 0; // initialized to 0 to suppress warnings
+ char base64code2 = 0; // initialized to 0 to suppress warnings
char base64code3;
base64code0 = decoding_data[static_cast<int>(input[i])];
- if (base64code0 == nop) // non base64 character
+ if (base64code0 == nop) // non base64 character
return false;
- if (!(++i < input_length)) // we need at least two input bytes for first
- // byte output
+ if (!(++i < input_length)) // we need at least two input bytes for first
+ // byte output
return false;
base64code1 = decoding_data[static_cast<int>(input[i])];
- if (base64code1 == nop) // non base64 character
+ if (base64code1 == nop) // non base64 character
return false;
output += ((base64code0 << 2) | ((base64code1 >> 4) & 0x3));
if (++i < input_length) {
char c = input[i];
- if (c == '=') { // padding , end of input
+ if (c == '=') { // padding , end of input
assert((base64code1 & 0x0f) == 0);
return true;
}
base64code2 = decoding_data[static_cast<int>(input[i])];
- if (base64code2 == nop) // non base64 character
+ if (base64code2 == nop) // non base64 character
return false;
output += ((base64code1 << 4) & 0xf0) | ((base64code2 >> 2) & 0x0f);
@@ -120,12 +106,12 @@ bool base64_decode(const gsl::cstring_span<> &input, std::string &output)
if (++i < input_length) {
char c = input[i];
- if (c == '=') { // padding , end of input
+ if (c == '=') { // padding , end of input
assert((base64code2 & 0x03) == 0);
return true;
}
base64code3 = decoding_data[static_cast<int>(input[i])];
- if (base64code3 == nop) // non base64 character
+ if (base64code3 == nop) // non base64 character
return false;
output += (((base64code2 << 6) & 0xc0) | base64code3);
@@ -134,5 +120,4 @@ bool base64_decode(const gsl::cstring_span<> &input, std::string &output)
return true;
}
-
} \ No newline at end of file
generated by cgit v1.2.3 (git 2.39.0) at 2024-06-18 16:39:13 +0300