diff options
Diffstat (limited to 'misc/efgcvt.c')
| -rw-r--r-- | misc/efgcvt.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/misc/efgcvt.c b/misc/efgcvt.c index 37b4bc0..5196c10 100644 --- a/misc/efgcvt.c +++ b/misc/efgcvt.c @@ -31,6 +31,7 @@ /* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we don't have log10 available in the preprocessor. */ # define MAXDIG (NDIGIT_MAX + 3) +# define FCVT_MAXDIG (DBL_MAX_10_EXP + MAXDIG) # if DBL_MANT_DIG == 53 # define NDIGIT_MAX 17 # elif DBL_MANT_DIG == 24 @@ -50,22 +51,34 @@ #define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer) +#define FCVT_BUFPTR APPEND (FUNC_PREFIX, fcvt_bufptr) #define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer) static char FCVT_BUFFER[MAXDIG]; static char ECVT_BUFFER[MAXDIG]; - +static char *FCVT_BUFPTR; char * APPEND (FUNC_PREFIX, fcvt) (value, ndigit, decpt, sign) FLOAT_TYPE value; int ndigit, *decpt, *sign; { + if (FCVT_BUFPTR == NULL) + { + if (APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign, + FCVT_BUFFER, MAXDIG) != -1) + return FCVT_BUFFER; + + FCVT_BUFPTR = (char *) malloc (FCVT_MAXDIG); + if (FCVT_BUFPTR == NULL) + return FCVT_BUFFER; + } + (void) APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign, - FCVT_BUFFER, MAXDIG); + FCVT_BUFPTR, FCVT_MAXDIG); - return FCVT_BUFFER; + return FCVT_BUFPTR; } @@ -89,3 +102,13 @@ APPEND (FUNC_PREFIX, gcvt) (value, ndigit, buf) sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value); return buf; } + +/* Free all resources if necessary. */ +static void __attribute__ ((unused)) +free_mem (void) +{ + if (FCVT_BUFPTR != NULL) + free (FCVT_BUFPTR); +} + +text_set_element (__libc_subfreeres, free_mem); |