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Diffstat (limited to 'www/design.html')
| -rw-r--r-- | www/design.html | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/www/design.html b/www/design.html index 37838be9..707596bc 100644 --- a/www/design.html +++ b/www/design.html @@ -303,8 +303,8 @@ effort on them.</p> <p>We depend on C99 and posix-2008 libc features such as the openat() family of functions. We also assume certain "modern" linux kernel behavior such -as large environment sizes (linux commit b6a2fea39318, went into 2.6.22 -released July 2007). In theory this shouldn't prevent us from working on +as large environment sizes (<a href=https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b6a2fea39318>linux commit b6a2fea39318</a>, went into 2.6.22 +released <a href=faq.html#support_horizon>July 2007</a>). In theory this shouldn't prevent us from working on older kernels or other implementations (ala BSD), but we don't police their corner cases.</p> @@ -316,9 +316,8 @@ in embedded devices for several more years.</p> <p>Toybox relies on the fact that on any Unix-like platform, pointer and long are always the same size (on both 32 and 64 bit). Pointer and int are _not_ -the same size on 64 bit systems, but pointer and long are.</p> - -<p>This is guaranteed by the LP64 memory model, a Unix standard (which Linux +the same size on 64 bit systems, but pointer and long are. +This is guaranteed by the LP64 memory model, a Unix standard (which Linux and MacOS X both implement, and which modern 64 bit processors such as x86-64 were <a href=http://www.pagetable.com/?p=6>designed for</a>). See <a href=http://www.unix.org/whitepapers/64bit.html>the LP64 standard</a> and @@ -335,7 +334,8 @@ platforms like arm, char defaults to signed. This difference can lead to subtle portability bugs, and to avoid them we specify which one we want by feeding the compiler -funsigned-char.</p> -<p>The reason to pick "unsigned" is that way we're 8-bit clean by default.</p> +<p>The reason to pick "unsigned" is that way char strings are 8-bit clean by +default, which makes UTF-8 support easier.</p> <p><h3>Error messages and internationalization:</h3></p> @@ -373,6 +373,9 @@ of it.)</p> <p>Locale support isn't currently a goal; that's a presentation layer issue (I.E. a GUI problem).</p> +<p>Someday we should probably have translated --help text, but that's a +post-1.0 issue.</p> + <p><h3>Shared Libraries</h3></p> <p>Toybox's policy on shared libraries is that they should never be @@ -486,7 +489,7 @@ varargs), "if (function() != NULL)" is the same as "if (function())", <p>The goal is to be concise, not cryptic: if you're worried about the code being hard to understand, splitting it to multiple steps on multiple lines is -better than a NOP operation like "!= NULL". A common sign of trying to +better than a NOP operation like "!= NULL". A common sign of trying too hard is nesting ? : three levels deep, sometimes if/else and a temporary variable is just plain easier to read. If you think you need a comment, you may be right.</p> |