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12 Commits

Author SHA1 Message Date
Benny Baumann 57e0ce7b4f Use `#if defined()` syntax when `#elif defined()` is present 
This prefers the `#if defined()` syntax over the `#ifdef` variant
whenever there's also a `#elif defined()` clause, thus making the
multiple branching structure more obvious and the overall use
more consistent.
 2021-03-21 21:49:04 +01:00
Christian Göttsche e6d536dd3f Add compiler hints on memory allocating utility functions 2021-01-11 21:08:58 +01:00
Christian Göttsche 397b5c4bd0 Introduce spaceship comparison for Processes 
If currently two unsigned values are compared via `a - b`, in the case b
is actually bigger than a, the result will not be an negative number (as
-1 is expected) but a huge positive number as the subtraction is an
unsigned subtraction.

Avoid over-/underflow affected operations; use comparisons.
Modern compilers will generate sane code, like:
    xor     eax, eax
    cmp     rdi, rsi
    seta    al
    sbb     eax, 0
    ret
 2020-11-15 18:25:21 +01:00
Christian Göttsche f8208f2173 Drop tabs in source indentions 2020-10-20 21:43:36 +02:00
Christian Göttsche 0db398d4c3 Allow low and high value of CLAMP to be equal 
Can for example occur in RichString_setAttrn(), when pausing and
resuming process tracing:

    htop: RichString.c:56: void RichString_setAttrn(RichString *, int, int, int): Assertion `(0) < (this->chlen - 1)' failed.

    ./htop(backtrace+0x5b)[0x45d9eb]
    ./htop(CRT_handleSIGSEGV+0x189)[0x4ebab9]
    /lib/x86_64-linux-gnu/libpthread.so.0(+0x14140)[0x7fd249d35140]
    /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x141)[0x7fd249b6ac41]
    /lib/x86_64-linux-gnu/libc.so.6(abort+0x123)[0x7fd249b54537]
    /lib/x86_64-linux-gnu/libc.so.6(+0x2540f)[0x7fd249b5440f]
    /lib/x86_64-linux-gnu/libc.so.6(+0x345c2)[0x7fd249b635c2]
    ./htop(RichString_setAttrn+0x234)[0x526de4]
    ./htop(RichString_setAttr+0x50)[0x5275c0]
    ./htop(Panel_draw+0x17b6)[0x514c26]
    ./htop(InfoScreen_run+0x305)[0x4fe7a5]
    ./htop[0x4d59d8]
    ./htop[0x5029cf]
    ./htop(ScreenManager_run+0x69f)[0x52a82f]
    ./htop(main+0x704)[0x4f8774]
    /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xea)[0x7fd249b55cca]
    ./htop(_start+0x2a)[0x4268ea]
 2020-10-19 14:13:58 +02:00
Benny Baumann 0f5262917f Make all required includes explicit 
Information as seen by IWYU 0.12 + clang 9 on Linux
 2020-10-18 20:09:05 +02:00
Christian Göttsche db159e7580 Enclose CLAMP macro arguments in parentheses 2020-10-06 11:46:41 +02:00
Christian Göttsche db472075a4 Enable -Wcast-qual compiler warning 2020-10-06 11:20:07 +02:00
Christian Göttsche 49bb1b57f8 Assert that low value is lower than the high value in CLAMP 2020-10-05 12:47:56 +02:00
Christian Göttsche 42946ec113 Introduce ARRAYSIZE 2020-10-03 19:05:40 +02:00
Christian Göttsche 7107d1db0b Refactor __attribute__ usage 
Use internal macros for compatibility with non GNUC compilers.
 2020-09-18 12:28:40 +02:00
Nathan Scott c5808c56db Consolidate repeated macro definitions into one header 
The MIN, MAX, CLAMP, MINIMUM, and MAXIMUM macros appear
throughout the codebase with many re-definitions.  Make
a single copy of each in a common header file, and use
the BSD variants of MINIMUM/MAXIMUM due to conflicts in
the system <sys/param.h> headers.
 2020-09-09 16:56:04 +10:00