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Bram Matthys
87 lines
3.6 KiB
Plaintext
87 lines
3.6 KiB
Plaintext
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Some minor rules about patches & modifications to UnrealIRCd
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1. When making a change, always add a small description in Changes, in the
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BOTTOM
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2. If new files are made, it must contain proper copyright headers,
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and a $Id$ somewhere.
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3. /*
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* These kind of comments
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*/
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NOT
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// These kind of comments
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4. if (something == 1)
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{
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moo; /* comment */
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/* This does what what what */
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cow(go(moo));
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}
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NOT
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if (something == 1) {
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}
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5. Do not touch version.c.SH or version.h, unless you are a head coder
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if you need a credit in, contact us
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6. Patches are submitted to coders@lists.unrealircd.org,
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using "cvs diff -u > patchname". A submision must contain description of
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what it does, etc.
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7. Protocol changes must be discussed before making patches for it.
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8. We do NOT rip people off. If we use other people's code, it MUST be
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properly credited.
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9. We generally use tabsize 4 and 8. In any case, use tabs and NOT spaces.
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Some code is old and horrible and has a mix of tabs and spaces used for
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spacing, that's something we do not want to have ;)
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10. Be careful about overflows. As you know a line from a user can never be longer
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than 511 (510?) characters, sometimes you can use this knowledge to your
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advantage. Whenever it's not safe or when you don't know what input size you
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can expect, use strlcpy instead of strcpy. Do not ever use strncpy, this is
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older, slower, and does not add proper zero termination.
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For the same reason, use snprintf if really needed. Note though, that using
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ircsprintf with a bigger buffer (eg: 1024 bytes) is MUCH faster, so preferably
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use that instead of snprintf. The same can be true for strcpy vs strlcpy in
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some circumstances as well.
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11. Speed. When optimizing or writing code, keep in mind that readability and
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stability comes first, and after that comes speed. So we'd rather prefer some
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readable code (even if difficult) over some odd highly optimized routine which
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nobody understands, is difficult to extend, and might have several bugs.
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As mentioned earlier: use ircsprintf, not sprintf (this is because ircsprintf
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is optimized for simple strings like the ones we use).
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Prefer ircsprintf with a bigger buffer over the use of snprintf, since
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ircsprintf is much faster.
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12. Initialize your structs and use the proper memory calls.
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In UnrealIRCd we use MyMalloc, MyMallocEx and MyFree (so not malloc/free).
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MyMalloc usually maps to malloc, and MyMallocEx is a malloc plus filling
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the memory area (eg: the struct) with zero's (a la calloc).
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Use of MyMallocEx is suggested. In general you should not be using MyMalloc.
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"But MyMalloc is faster!" you might say. This is true, but using MyMallocEx
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has very little speed impact and enourmous benefits: people tend to forget
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to set certain fields in the struct to NULL, or much more common: when
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someone later on (eg: 1 year later) adds a field to a struct, there could
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be several places he/she needs to update to make sure x->something is NULL
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after allocating a new struct. Bad idea.
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Little speed impact, huge stability benefits, easy decision ;).
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13. Comment your code! This should speak for itself...
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Put comments wherever you think they are needed, to aid any further coders
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with reading your code.. and, in fact, it will aid yourself as well if you
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would look back at your code 2 years later.
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If there's some obscure pitfall, do mention it! Don't just "hope" a next
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author will see it like you did.
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14. Use enums whenever possible, rather than #define constants. Besides making
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things more clean, it also aids debugging.
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