mirror of
https://github.com/moparisthebest/pacman
synced 2024-11-17 23:05:00 -05:00
cd8747ba6d
This gets us close to using the same modeline in all files we run through Asciidoc, as well as adding the spell and spelllang declarations, just as we had in NEWS already. The choice of 'en_us' is mainly for consistency and because the body of work already uses these spellings. Signed-off-by: Dan McGee <dan@archlinux.org>
152 lines
4.0 KiB
Plaintext
152 lines
4.0 KiB
Plaintext
Pacman - Contributing
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=====================
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This file is meant to give you a brief overview of coding style and other
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concerns when hacking on pacman. If you are interested in contributing, please
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read link:submitting-patches.html[submitting-patches] and
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link:translation-help.html[translation-help] as well.
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Coding style
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------------
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1. All code should be indented with tabs. (Ignore the use of only spaces in
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this file) By default, source files contain the following VIM modeline:
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+
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[source,C]
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-------------------------------------------
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/* vim: set ts=2 sw=2 noet: */
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-------------------------------------------
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2. When opening new blocks such as 'while', 'if', or 'for', leave the opening
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brace on the same line as the beginning of the codeblock. The closing brace
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gets its own line (the only exception being 'else'). Do not use extra
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spaces around the parentheses of the block. ALWAYS use opening and closing
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braces, even if it's just a one-line block. This reduces future error when
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blocks are expanded beyond one line.
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+
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[source,C]
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-------------------------------------------
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for(lp = list; lp; lp = lp->next) {
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newlist = _alpm_list_add(newlist, strdup(lp->data));
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}
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while(it) {
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ptr = it->next;
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if(fn) {
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fn(it->data);
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} else {
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return 1;
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}
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free(it);
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it = ptr;
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}
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-------------------------------------------
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3. When declaring a new function, put the opening and closing braces on their
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own line. Also, when declaring a pointer, do not put a space between the
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asterisk and the variable name.
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+
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[source,C]
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-------------------------------------------
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alpm_list_t *alpm_list_add(alpm_list_t *list, void *data)
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{
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alpm_list_t *ptr, *lp;
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ptr = list;
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if(ptr == NULL) {
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...
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}
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...
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}
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-------------------------------------------
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4. Comments should be ANSI-C89 compliant. That means no `// Comment` style;
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use only `/* Comment */` style.
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/* This is a comment */
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NOT
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// This is a comment
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5. Return statements should *not* be written like function calls.
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return 0;
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NOT
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return(0);
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6. The sizeof() operator should accept a type, not a value. (TODO: in certain
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cases, it may be better- should this be a set guideline? Read "The Practice
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of Programming")
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sizeof(alpm_list_t);
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NOT
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sizeof(*mylist);
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7. When using strcmp() (or any function that returns 0 on success) in a
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conditional statement, use != 0 or == 0 and not the negation (!) operator.
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It reads much cleaner for humans (using a negative to check for success is
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confusing) and the compiler will treat it correctly anyway.
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if(strcmp(a, b) == 0)
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NOT
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if(!strcmp(a, b))
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Other Concerns
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--------------
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Header Includes
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~~~~~~~~~~~~~~~
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Currently our #include usage is in messy shape, but this is no reason to
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continue down this messy path. When adding an include to a file, follow this
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general pattern, including blank lines:
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[source,C]
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-------------------------------------------
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#include "config.h"
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#include <standardheader.h>
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#include <another.h>
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#include <...>
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-------------------------------------------
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Follow this with some more headers, depending on whether the file is in libalpm
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or pacman proper. For libalpm:
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[source,C]
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-------------------------------------------
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/* libalpm */
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#include "yourfile.h"
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#include "alpm_list.h"
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#include "anythingelse.h"
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-------------------------------------------
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For pacman:
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[source,C]
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-------------------------------------------
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#include <alpm.h>
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#include <alpm_list.h>
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/* pacman */
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#include "yourfile.h"
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#include "anythingelse.h"
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-------------------------------------------
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GDB and Valgrind Usage
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~~~~~~~~~~~~~~~~~~~~~~
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When using GDB or valgrind on pacman, you will want to run it on the actual
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binary rather than the shell script wrapper produced by libtool. The actual
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binary lives at `src/pacman/.libs/lt-pacman`, and will exist after running
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`./src/pacman/pacman` at least once.
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For example, to run valgrind:
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./src/pacman/pacman
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valgrind --leak-check=full -- src/pacman/.libs/lt-pacman -Syu
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/////
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vim:set ts=4 sw=4 syntax=asciidoc noet spell spelllang=en_us:
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/////
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