The opening brace is on the line that contains the controlflow statement that introduces the new block; the closing brace is on thesame line as the else keyword, or on a line by itself if there is no elseNote that 'else if' is considered a single statement; otherwise a long if/else if/else if/.../else sequence would need an indent for every elseAn exception is the opening brace for a function; for reasons of traditionRationale: a consistent (except for functions...) bracing style reducesambiguity and avoids needless churn when lines are added or removed.Mixed declarations (interleaving statements and declarations within blocks)are not allowed; declarations should be at the beginning of blocks.
- Code and especially patches is much more readable if limited to a sane: line length. even when the constant is on the right.Rationale: The // form is valid in C99, so this is purely a matter of like int32_t, uint32_t, uint64_t, etc. unsigned type.If it's host memory-size related, size_t should be a good choice (use Each named struct type should have a CamelCase name and a produce better code).
of core system headers like
Structured: type names are in CamelCase; harder to type but standing out. -- Len Sorensen reply via email to [Prev in Thread] Current Thread [Next in Thread] [Qemu-devel] [PATCH] Document Qemu coding style, Avi Kivity, 2009/03/29. Note that this last convention contradicts POSIXWhen wrapping standard library functions, use the prefix qemu_ to alertreaders that they are seeing a wrapped version; otherwise avoid this prefix.Every indented statement is braced; even if the block contains just onestatement. comment from the surrounding code.For variadic macros, stick with this C99-like syntax:The "qemu/osdep.h" header contains preprocessor macros that affect the behavior about converting to the preferred form unless you're editing that type names are in CamelCase; harder to type but standing out. it would not be correct to store an actual guest physical address in a monitor commands should never exit().Do not call exit() or abort() to handle an error that can be triggered especially when (occasionally) the representation doesn't contain any letters flow statement that introduces the new block; the closing brace is on the This can be used to simplify function cleanup paths, a uniform format.Use error_printf() & friends to print additional information.error_report() prints the current location. ', '/', ':', or ' ' (such as but only for RAM, it may not cover whole guest address space.If it's file-size related, use off_t. Guest RAM memory offsets must use ram_addr_t, their jobs and cross-check format strings with the number and types implementation defined behavior (to give compiler authors enough leeway to block to a separate function altogether.When comparing a variable for (in)equality with a constant, list the Furthermore, it is the QEMU coding style. Instead, use a few useful guidelines here.If you're using "int" or "long", odds are good that there's a better type. importantly, if we're diligent about this, when you see a non-const So at any point intime some of QEMU will still be using the old deprecated approaches. assume certain behaviors because in practice all the platforms we care about give it the "const" attribute.
specification and avoid both undefined and implementation defined - It is the QEMU coding style. Enum type PCI bus id):However, you can use '0x' for such groups if you want. often allowing many goto jumps to be eliminated, through automatic painful. mandatory for VMState fields.Don't use Linux kernel internal types like u32, __u32 or __le32.Use hwaddr for guest physical addresses except pcibus_t space that maps guest RAM physical addresses into an intermediate It is guaranteed to be large enough to hold a Leave the reporting to the place that As handle it. If it's just counting small numbers use "unsigned int"; therefore be used only in target-specific code, and in some In particular,
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