Fixes nim-lang#12187

lib/pure/memfiles.nim

@@ -416,7 +416,7 @@ iterator memSlices*(mfile: MemFile, delim = '\l', eat = '\r'): MemSlice {.inline
   ms.data = mfile.mem
   var remaining = mfile.size
   while remaining > 0:
-    ending = c_memchr(ms.data, delim, remaining)
+    ending = c_memchr(ms.data, delim, csize remaining)
     if ending == nil: # unterminated final slice
       ms.size = remaining # Weird case..check eat?
       yield ms

lib/pure/strutils.nim

@@ -1872,7 +1872,7 @@ proc find*(s: string, sub: char, start: Natural = 0, last = 0): int {.noSideEffe
     when hasCStringBuiltin:
       let L = last-start+1
       if L > 0:
-        let found = c_memchr(s[start].unsafeAddr, sub, L)
+        let found = c_memchr(s[start].unsafeAddr, sub, csize L)
         if not found.isNil:
           return cast[ByteAddress](found) -% cast[ByteAddress](s.cstring)
     else:

lib/system.nim

@@ -2233,7 +2233,7 @@ type # these work for most platforms:
     ## This is the same as the type ``short`` in *C*.
   cint* {.importc: "int", nodecl.} = int32
     ## This is the same as the type ``int`` in *C*.
-  csize* {.importc: "size_t", nodecl.} = int
+  csize* {.importc: "size_t", nodecl.} = uint
     ## This is the same as the type ``size_t`` in *C*.
   clonglong* {.importc: "long long", nodecl.} = int64
     ## This is the same as the type ``long long`` in *C*.
@@ -3597,7 +3597,7 @@ when not defined(JS): #and not defined(nimscript):
       when declared(memTrackerOp):
         memTrackerOp("copyMem", dest, size)
     proc moveMem(dest, source: pointer, size: Natural) =
-      c_memmove(dest, source, size)
+      c_memmove(dest, source, csize size)
       when declared(memTrackerOp):
         memTrackerOp("moveMem", dest, size)
     proc equalMem(a, b: pointer, size: Natural): bool =

lib/system/ansi_c.nim

@@ -17,14 +17,24 @@ when not defined(nimHasHotCodeReloading):
 
 proc c_memchr*(s: pointer, c: cint, n: csize): pointer {.
   importc: "memchr", header: "<string.h>".}
+proc c_memchr*(s: pointer, c: cint, n: cint): pointer {.
+  importc: "memchr", header: "<string.h>", deprecated: "csize is now uint".}
 proc c_memcmp*(a, b: pointer, size: csize): cint {.
   importc: "memcmp", header: "<string.h>", noSideEffect.}
+proc c_memcmp*(a, b: pointer, size: cint): cint {.
+  importc: "memcmp", header: "<string.h>", noSideEffect, deprecated: "csize is now uint".}
 proc c_memcpy*(a, b: pointer, size: csize): pointer {.
   importc: "memcpy", header: "<string.h>", discardable.}
+proc c_memcpy*(a, b: pointer, size: cint): pointer {.
+  importc: "memcpy", header: "<string.h>", discardable, deprecated: "csize is now uint".}
 proc c_memmove*(a, b: pointer, size: csize): pointer {.
   importc: "memmove", header: "<string.h>",discardable.}
+proc c_memmove*(a, b: pointer, size: cint): pointer {.
+  importc: "memmove", header: "<string.h>",discardable, deprecated: "csize is now uint".}
 proc c_memset*(p: pointer, value: cint, size: csize): pointer {.
   importc: "memset", header: "<string.h>", discardable.}
+proc c_memset*(p: pointer, value: cint, size: cint): pointer {.
+  importc: "memset", header: "<string.h>", discardable, deprecated: "csize is now uint".}
 proc c_strcmp*(a, b: cstring): cint {.
   importc: "strcmp", header: "<string.h>", noSideEffect.}
 proc c_strlen*(a: cstring): csize {.
@@ -134,16 +144,22 @@ proc c_sprintf*(buf, frmt: cstring): cint {.
 
 proc c_malloc*(size: csize): pointer {.
   importc: "malloc", header: "<stdlib.h>".}
+proc c_malloc*(size: cint): pointer {.
+  importc: "malloc", header: "<stdlib.h>", deprecated: "csize is now uint".}
 proc c_free*(p: pointer) {.
   importc: "free", header: "<stdlib.h>".}
 proc c_realloc*(p: pointer, newsize: csize): pointer {.
   importc: "realloc", header: "<stdlib.h>".}
+proc c_realloc*(p: pointer, newsize: cint): pointer {.
+  importc: "realloc", header: "<stdlib.h>", deprecated: "csize is now uint".}
 
 proc c_fwrite*(buf: pointer, size, n: csize, f: CFilePtr): cint {.
   importc: "fwrite", header: "<stdio.h>".}
+proc c_fwrite*(buf: pointer, size, n: cint, f: CFilePtr): cint {.
+  importc: "fwrite", header: "<stdio.h>", deprecated: "csize is now uint".}
 
 proc rawWrite*(f: CFilePtr, s: cstring) {.compilerproc, nonReloadable, inline.} =
   # we cannot throw an exception here!
-  discard c_fwrite(s, 1, s.len, f)
+  discard c_fwrite(s, 1, csize s.len, f)
 
 {.pop.}

lib/system/io.nim

@@ -85,10 +85,14 @@ proc c_feof(f: File): cint {.
 when not declared(c_fwrite):
   proc c_fwrite(buf: pointer, size, n: csize, f: File): cint {.
     importc: "fwrite", header: "<stdio.h>".}
+  proc c_fwrite(buf: pointer, size, n: cint, f: File): cint {.
+    importc: "fwrite", header: "<stdio.h>", deprecated: "csize is now uint".}
 
 # C routine that is used here:
 proc c_fread(buf: pointer, size, n: csize, f: File): csize {.
   importc: "fread", header: "<stdio.h>", tags: [ReadIOEffect].}
+proc c_fread(buf: pointer, size, n: cint, f: File): int {.
+  importc: "fread", header: "<stdio.h>", tags: [ReadIOEffect], deprecated: "csize is now uint".}
 when defined(windows):
   when not defined(amd64):
     proc c_fseek(f: File, offset: int64, whence: cint): cint {.
@@ -109,6 +113,8 @@ proc c_ferror(f: File): cint {.
   importc: "ferror", header: "<stdio.h>", tags: [].}
 proc c_setvbuf(f: File, buf: pointer, mode: cint, size: csize): cint {.
   importc: "setvbuf", header: "<stdio.h>", tags: [].}
+proc c_setvbuf(f: File, buf: pointer, mode: cint, size: cint): cint {.
+  importc: "setvbuf", header: "<stdio.h>", tags: [], deprecated: "csize is now uint".}
 
 proc c_fprintf(f: File, frmt: cstring): cint {.
   importc: "fprintf", header: "<stdio.h>", varargs, discardable.}
@@ -292,6 +298,8 @@ proc readLine*(f: File, line: var TaintedString): bool {.tags: [ReadIOEffect],
   ## ``false`` is returned `line` contains no new data.
   proc c_memchr(s: pointer, c: cint, n: csize): pointer {.
     importc: "memchr", header: "<string.h>".}
+  proc c_memchr(s: pointer, c: cint, n: cint): pointer {.
+    importc: "memchr", header: "<string.h>", deprecated: "csize is now uint".}
 
   var pos = 0
 

lib/system/memory.nim

@@ -10,7 +10,7 @@ when useLibC:
 
 proc nimCopyMem*(dest, source: pointer, size: Natural) {.nonReloadable, compilerproc, inline.} =
   when useLibC:
-    c_memcpy(dest, source, size)
+    c_memcpy(dest, source, csize size)
   else:
     let d = cast[ptr UncheckedArray[byte]](dest)
     let s = cast[ptr UncheckedArray[byte]](source)
@@ -21,7 +21,7 @@ proc nimCopyMem*(dest, source: pointer, size: Natural) {.nonReloadable, compiler
 
 proc nimSetMem*(a: pointer, v: cint, size: Natural) {.nonReloadable, inline.} =
   when useLibC:
-    c_memset(a, v, size)
+    c_memset(a, v, csize size)
   else:
     let a = cast[ptr UncheckedArray[byte]](a)
     var i = 0
@@ -35,7 +35,7 @@ proc nimZeroMem*(p: pointer, size: Natural) {.compilerproc, nonReloadable, inlin
 
 proc nimCmpMem*(a, b: pointer, size: Natural): cint {.compilerproc, nonReloadable, inline.} =
   when useLibC:
-    c_memcmp(a, b, size)
+    c_memcmp(a, b, csize size)
   else:
     let a = cast[ptr UncheckedArray[byte]](a)
     let b = cast[ptr UncheckedArray[byte]](b)

lib/system/osalloc.nim

@@ -221,18 +221,18 @@ elif defined(posix):
   proc munmap(adr: pointer, len: csize): cint {.header: "<sys/mman.h>".}
 
   proc osAllocPages(size: int): pointer {.inline.} =
-    result = mmap(nil, size, PROT_READ or PROT_WRITE,
+    result = mmap(nil, csize size, PROT_READ or PROT_WRITE,
                              MAP_PRIVATE or MAP_ANONYMOUS, -1, 0)
     if result == nil or result == cast[pointer](-1):
       raiseOutOfMem()
 
   proc osTryAllocPages(size: int): pointer {.inline.} =
-    result = mmap(nil, size, PROT_READ or PROT_WRITE,
+    result = mmap(nil, csize size, PROT_READ or PROT_WRITE,
                              MAP_PRIVATE or MAP_ANONYMOUS, -1, 0)
     if result == cast[pointer](-1): result = nil
 
   proc osDeallocPages(p: pointer, size: int) {.inline.} =
-    when reallyOsDealloc: discard munmap(p, size)
+    when reallyOsDealloc: discard munmap(p, csize size)
 
 elif defined(windows):
   const

lib/wrappers/openssl.nim

@@ -712,7 +712,7 @@ proc md5_File*(file: string): string {.raises: [IOError,Exception].} =
 
   discard md5_Init(ctx)
   while(let bytes = f.readChars(buf, 0, sz); bytes > 0):
-    discard md5_Update(ctx, buf[0].addr, bytes)
+    discard md5_Update(ctx, buf[0].addr, csize bytes)
 
   discard md5_Final(buf[0].addr, ctx)
   f.close
@@ -731,7 +731,7 @@ proc md5_Str*(str: string): string =
   var i = 0
   while i < str.len:
     let L = min(str.len - i, 512)
-    discard md5_Update(ctx, input[i].addr, L)
+    discard md5_Update(ctx, input[i].addr, csize L)
     i += L
 
   discard md5_Final(addr res, ctx)

tests/manyloc/keineschweine/lib/estreams.nim

@@ -26,7 +26,7 @@ proc newBuffer*(pkt: PPacket): PBuffer =
   copyMem(addr result.data[0], pkt.data, pkt.dataLength)
 proc toPacket*(buffer: PBuffer; flags: TPacketFlag): PPacket =
   buffer.data.setLen buffer.pos
-  result = createPacket(cstring(buffer.data), buffer.pos, flags)
+  result = createPacket(cstring(buffer.data), csize buffer.pos, flags)
 
 proc isDirty*(buffer: PBuffer): bool {.inline.} =
   result = (buffer.pos != 0)