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Assorted V86-mode fixes and IOPM support

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This commit is contained in:
Jeff Parsons 2015-07-24 16:53:39 -07:00
commit afcdd055e1
7 changed files with 445 additions and 75 deletions
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25
modules/shared/lib/strlib.js
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@ -42,13 +42,14 @@ var str = {};
* So use this function to validate the entire string.
*
* @param {string} s is the string representation of some number
* @param {number} [base] is the radix of the number represented above (only 10 and 16 are supported)
* @param {number} [base] is the radix of the number represented above (only 2, 10 and 16 are supported)
* @return {boolean} true if valid, false if invalid (or the specified base isn't supported)
*/
str.isValidInt = function(s, base)
{
if (!base || base == 10) return s.match(/^[0-9]+$/) !== null;
if (base == 16) return s.match(/^[0-9a-f]+$/i) !== null;
if (base == 2) return s.match(/^[01]+$/i) !== null;
return false;
};
@ -56,8 +57,11 @@ str.isValidInt = function(s, base)
* parseInt(s, base)
*
* This is a wrapper around the built-in parseInt() function, which recognizes certain prefixes (eg,
* '$' or "0x" for hex) and suffixes (eg, 'h' for hex or '.' for decimal), and then calls isValidInt()
* to ensure we don't get partial values (see isValidInt() for details).
* '$' or "0x" for hex) and suffixes (eg, 'h' for hex, or '.' for decimal), and then calls isValidInt()
* to ensure we don't convert strings that contain partial values (see isValidInt() for details).
*
* We don't support multiple prefix/suffix combinations, nor do we support the "0b" prefix (or "b" suffix)
* for binary, because 1) it's not commonly used, and 2) it conflicts with valid hex sequences.
*
* @param {string} s is the string representation of some number
* @param {number} [base] is the default radix to use (default is 16); can be overridden by prefixes/suffixes
@ -84,7 +88,7 @@ str.parseInt = function(s, base)
base = 10;
chSuffix = null;
}
if (chSuffix === null) s = s.substr(0, s.length-1);
if (chSuffix == null) s = s.substr(0, s.length-1);
}
var v;
if (str.isValidInt(s, base) && !isNaN(v = parseInt(s, base))) {
@ -108,13 +112,16 @@ str.toBin = function(n, cch)
var s = "";
if (cch === undefined) {
cch = 32;
s = "b";
} else {
if (cch > 32) cch = 32;
}
/*
* An initial "falsey" check for null takes care of both null and undefined;
* we can't rely entirely on isNaN(), because isNaN(null) returns false, oddly enough.
*
* Alternatively, we could mask and shift n regardless of whether it's null/undefined/NaN,
* since JavaScript coerces such operands to zero, but I think there's "value" in seeing those
* values displayed differently.
*/
if (n == null || isNaN(n)) {
while (cch-- > 0) s = '?' + s;
@ -155,8 +162,8 @@ str.toBinBytes = function(n, cb)
*
* You might be tempted to use the built-in n.toString(16) instead, but it doesn't zero-pad and it
* doesn't properly convert negative values; for example, if n is -2147483647, then n.toString(16)
* will return "-7fffffff" instead of "80000001". Moreover, if n is undefined, n.toString() will throw
* an exception, whereas toHex() will simply return '?' characters.
* will return "-7fffffff" instead of "80000001". Moreover, if n is undefined, n.toString() will
* throw an exception, whereas this function will return '?' characters.
*
* NOTE: The following work-around (adapted from code found on StackOverflow) would be another solution,
* taking care of negative values, zero-padding, and upper-casing, but not null/undefined/NaN values:
@ -180,6 +187,10 @@ str.toHex = function(n, cch)
/*
* An initial "falsey" check for null takes care of both null and undefined;
* we can't rely entirely on isNaN(), because isNaN(null) returns false, oddly enough.
*
* Alternatively, we could mask and shift n regardless of whether it's null/undefined/NaN,
* since JavaScript coerces such operands to zero, but I think there's "value" in seeing those
* values displayed differently.
*/
if (n == null || isNaN(n)) {
while (cch-- > 0) s = '?' + s;