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authorlittleblack111 <littleblack11111@gmail.com>2024-10-13 10:37:19 +0800
committerlittleblack111 <littleblack11111@gmail.com>2024-10-13 10:37:19 +0800
commite29b244aeab08ea36fb385c7beb2ad0560217039 (patch)
treec66b744dc29573f1acc871862937a23f1b80e6bf /node_modules/source-map/lib/base64.js
parent62c2881629e6413a8fec6d3dd092e4568e2a81dc (diff)
bump: @babel/cli 7.25.6 → 7.25.7, @babel/core 7.25.2 → 7.25.8, @babel/preset-env 7.25.4 → 7.25.8, postcss 8.4.41 → 8.4.47, swup 4.7.0 → 4.8.1
Diffstat (limited to 'node_modules/source-map/lib/base64.js')
-rw-r--r--node_modules/source-map/lib/base64.js53
1 files changed, 51 insertions, 2 deletions
diff --git a/node_modules/source-map/lib/base64.js b/node_modules/source-map/lib/base64.js
index b9ca3199..8aa86b30 100644
--- a/node_modules/source-map/lib/base64.js
+++ b/node_modules/source-map/lib/base64.js
@@ -5,14 +5,63 @@
* http://opensource.org/licenses/BSD-3-Clause
*/
-const intToCharMap = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("");
+var intToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');
/**
* Encode an integer in the range of 0 to 63 to a single base 64 digit.
*/
-exports.encode = function(number) {
+exports.encode = function (number) {
if (0 <= number && number < intToCharMap.length) {
return intToCharMap[number];
}
throw new TypeError("Must be between 0 and 63: " + number);
};
+
+/**
+ * Decode a single base 64 character code digit to an integer. Returns -1 on
+ * failure.
+ */
+exports.decode = function (charCode) {
+ var bigA = 65; // 'A'
+ var bigZ = 90; // 'Z'
+
+ var littleA = 97; // 'a'
+ var littleZ = 122; // 'z'
+
+ var zero = 48; // '0'
+ var nine = 57; // '9'
+
+ var plus = 43; // '+'
+ var slash = 47; // '/'
+
+ var littleOffset = 26;
+ var numberOffset = 52;
+
+ // 0 - 25: ABCDEFGHIJKLMNOPQRSTUVWXYZ
+ if (bigA <= charCode && charCode <= bigZ) {
+ return (charCode - bigA);
+ }
+
+ // 26 - 51: abcdefghijklmnopqrstuvwxyz
+ if (littleA <= charCode && charCode <= littleZ) {
+ return (charCode - littleA + littleOffset);
+ }
+
+ // 52 - 61: 0123456789
+ if (zero <= charCode && charCode <= nine) {
+ return (charCode - zero + numberOffset);
+ }
+
+ // 62: +
+ if (charCode == plus) {
+ return 62;
+ }
+
+ // 63: /
+ if (charCode == slash) {
+ return 63;
+ }
+
+ // Invalid base64 digit.
+ return -1;
+};