diff options
Diffstat (limited to 'libntp/dolfptoa.c')
| -rw-r--r-- | libntp/dolfptoa.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libntp/dolfptoa.c b/libntp/dolfptoa.c index 7c92a30..f68679c 100644 --- a/libntp/dolfptoa.c +++ b/libntp/dolfptoa.c @@ -36,6 +36,14 @@ dolfptoa( memset((char *) cbuf, 0, sizeof(cbuf)); /* + * safeguard against sign extensions and other mishaps on 64 bit platforms + * the code following is designed for and only for 32-bit inputs and + * only 32-bit worth of input are supplied. + */ + fpi &= 0xffffffff; + fpv &= 0xffffffff; + + /* * Work on the integral part. This is biased by what I know * compiles fairly well for a 68000. */ @@ -49,6 +57,7 @@ dolfptoa( ltmp = lwork; lwork /= lten; ltmp -= (lwork << 3) + (lwork << 1); + if (cp < cbuf) abort(); /* rather die a horrible death than trash the memory */ *--cp = (u_char)ltmp; } while (lwork & 0xffff0000); } @@ -61,6 +70,7 @@ dolfptoa( stmp = swork; swork = (u_short) (swork/sten); stmp = (u_short)(stmp - ((swork<<3) + (swork<<1))); + if (cp < cbuf) abort(); /* rather die a horrible death than trash the memory */ *--cp = (u_char)stmp; } while (swork != 0); } @@ -110,6 +120,7 @@ dolfptoa( *cpend++ = (u_char)work.l_ui; if (work.l_uf == 0) break; + if (cpend > (cbuf + sizeof(cbuf))) abort(); /* rather die a horrible death than trash the memory */ } /* |
