diff options
| author | Manuel Novoa III <mjn3@codepoet.org> | 2001-01-30 16:00:13 +0000 |
|---|---|---|
| committer | Manuel Novoa III <mjn3@codepoet.org> | 2001-01-30 16:00:13 +0000 |
| commit | ec2e4b41b98fdc9083405be56b8bfa91d892438e (patch) | |
| tree | bfb8b5bf24fc8ded3433da5942a39ae849eacafa | |
| parent | 35ec5000a5d5319a3f64931561e20ba20ebe7f65 (diff) | |
Added some notes. Removed some dead code.
| -rw-r--r-- | libc/misc/internals/dtostr.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/libc/misc/internals/dtostr.c b/libc/misc/internals/dtostr.c index 9fe7b2624..498887fb3 100644 --- a/libc/misc/internals/dtostr.c +++ b/libc/misc/internals/dtostr.c @@ -9,6 +9,11 @@ * * Notes: * + * At most MAX_DIGITS significant digits are kept. Any trailing digits + * are treated as 0 as they are really just the results of rounding noise + * anyway. If you want to do better, use an arbitary precision arithmetic + * package. ;-) + * * It should also be fairly portable, as not assumptions are made about the * bit-layout of doubles. * @@ -154,7 +159,6 @@ int __dtostr(FILE * fp, size_t size, double x, char *s; char *e; char buf[BUF_SIZE]; - char buf2[BUF_SIZE]; INT_OR_PTR pc_fwi[2*MAX_CALLS]; INT_OR_PTR *ppc; char exp_buf[8]; @@ -232,7 +236,7 @@ int __dtostr(FILE * fp, size_t size, double x, assert(x < 1e9); GENERATE_DIGITS: - s = buf2 + 2; /* leave space for '\0' and '0' */ + s = buf + 2; /* leave space for '\0' and '0' */ for (i = 0 ; i < NUM_DIGIT_BLOCKS ; ++i ) { digit_block = (DIGIT_BLOCK_TYPE) x; @@ -260,9 +264,6 @@ int __dtostr(FILE * fp, size_t size, double x, round += exp; } - RESTART: - memcpy(buf,buf2,sizeof(buf2)); /* backup in case g need to be f */ - s = buf; *s++ = 0; /* terminator for rounding and 0-triming */ *s = '0'; /* space to round */ @@ -291,7 +292,6 @@ int __dtostr(FILE * fp, size_t size, double x, if ((mode == 'g') && ((o_exp >= -4) && (o_exp < round))) { mode = 'f'; - goto RESTART; } exp = o_exp; |