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comparison util-src/ringbuffer.c @ 10899:8048255ae61e

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util.ringbuffer: Prevent creation of buffer with negative size Previously this would have been (unsigned)-1 which is a large positive integer.
author Kim Alvefur <zash@zash.se>
date Thu, 04 Jun 2020 16:11:08 +0200
parents c6465fb3c839
children 5e33926f4b43
comparison
equal deleted inserted replaced
10898:c6465fb3c839 10899:8048255ae61e
195 lua_pushinteger(L, b->alen - b->blen); 195 lua_pushinteger(L, b->alen - b->blen);
196 return 1; 196 return 1;
197 } 197 }
198 198
199 static int rb_new(lua_State *L) { 199 static int rb_new(lua_State *L) {
200 size_t size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE)); 200 lua_Integer size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE));
201 luaL_argcheck(L, size > 0, 1, "positive integer expected"); 201 luaL_argcheck(L, size > 0, 1, "positive integer expected");
202 ringbuffer *b = lua_newuserdata(L, sizeof(ringbuffer) + size); 202 ringbuffer *b = lua_newuserdata(L, sizeof(ringbuffer) + size);
203 203
204 b->rpos = 0; 204 b->rpos = 0;
205 b->wpos = 0; 205 b->wpos = 0;