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{.push stack_trace: off.}
const useLibC = not defined(nimNoLibc)
when useLibC:
import ansi_c
proc nimCopyMem*(dest, source: pointer, size: Natural) {.nonReloadable, compilerproc, inline.} =
when useLibC:
c_memcpy(dest, source, cast[csize_t](size))
else:
let d = cast[ptr UncheckedArray[byte]](dest)
let s = cast[ptr UncheckedArray[byte]](source)
var i = 0
while i < size:
d[i] = s[i]
inc i
proc nimSetMem*(a: pointer, v: cint, size: Natural) {.nonReloadable, inline.} =
when useLibC:
c_memset(a, v, cast[csize_t](size))
else:
let a = cast[ptr UncheckedArray[byte]](a)
var i = 0
let v = cast[byte](v)
while i < size:
a[i] = v
inc i
proc nimZeroMem*(p: pointer, size: Natural) {.compilerproc, nonReloadable, inline.} =
nimSetMem(p, 0, size)
proc nimCmpMem*(a, b: pointer, size: Natural): cint {.compilerproc, nonReloadable, inline.} =
when useLibC:
c_memcmp(a, b, cast[csize_t](size))
else:
let a = cast[ptr UncheckedArray[byte]](a)
let b = cast[ptr UncheckedArray[byte]](b)
var i = 0
while i < size:
let d = a[i].cint - b[i].cint
if d != 0: return d
inc i
proc nimCStrLen*(a: cstring): int {.compilerproc, nonReloadable, inline.} =
when useLibC:
cast[int](c_strlen(a))
else:
var a = cast[ptr byte](a)
while a[] != 0:
a = cast[ptr byte](cast[uint](a) + 1)
inc result
{.pop.}
|