diff options
author | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
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committer | Norbert Preining <norbert@preining.info> | 2019-09-02 13:46:59 +0900 |
commit | e0c6872cf40896c7be36b11dcc744620f10adf1d (patch) | |
tree | 60335e10d2f4354b0674ec22d7b53f0f8abee672 /support/dktools/dk4mai8dbl.ctr |
Initial commit
Diffstat (limited to 'support/dktools/dk4mai8dbl.ctr')
-rw-r--r-- | support/dktools/dk4mai8dbl.ctr | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/support/dktools/dk4mai8dbl.ctr b/support/dktools/dk4mai8dbl.ctr new file mode 100644 index 0000000000..934270f057 --- /dev/null +++ b/support/dktools/dk4mai8dbl.ctr @@ -0,0 +1,261 @@ +%% options + +copyright owner = Dirk Krause +copyright year = 2015-xxxx +license = bsd + + + +%% header + +/** @file + Read double value from char string. + + CRT on Windows: Required. +*/ + +#ifndef DK4CONF_H_INCLUDED +#include "dk4conf.h" +#endif + +#ifndef DK4TYPES_H_INCLUDED +#include "dk4types.h" +#endif + +#ifndef DK4ERROR_H_INCLUDED +#include "dk4error.h" +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +/** Read double value from char string. + The function temporarily resets the LC_NUMERIC locale setting + to "C" to retrieve the number and returns the setting to the + original value before returning. + @param rp Address of result variable. + @param src String to process. + @param endptr Address of pointer variable. + A pointer to the first character not processed + is stored here. The function may also store + a NULL pointer here. + The pointer variable is probably left unchanged + on errors or if strtod() is not available on your + system (the sscanf() function is used as fallback). + @param atg Allow trailing garbage: + 0=no unprocessable trailing bytes allowed, + 1=trailing whitespaces allowed, + 2=any trailing characaters allowed. + @param erp Error report, may be NULL. + @return 1 on success, 0 on error. + + Error codes: + DK4_E_INVALID_ARGUMENTS if rp or src is NULL, + DK4_E_SYNTAX if there are unexpected characters in the + string, + DK4_E_MATH_OVERFLOW if a mathematical overflow occurs, + DK4_E_MATH_UNDERFLOW if a mathematical underflow occurs. +*/ + +int +dk4ma_input_c8_double( + double *rp, + const char *src, + const char **endptr, + int atg, + dk4_er_t *erp +); + +#ifdef __cplusplus +} +#endif + + +%% module + + +#include "dk4mai8dbl.h" + +#include "dk4str8.h" + +#if DK4_HAVE_ERRNO_H +#ifndef ERRNO_H_INCLUDED +#include <errno.h> +#define ERRNO_H_INCLUDED 1 +#endif +#endif + +#if DK4_HAVE_LOCALE_H +#ifndef LOCALE_H_INCLUDED +#include <locale.h> +#define LOCALE_H_INCLUDED 1 +#endif +#endif + +#if DK4_HAVE_STDLIB_H +#ifndef STDLIB_H_INCLUDED +#include <stdlib.h> +#define STDLIB_H_INCLUDED 1 +#endif +#endif + +#if DK4_HAVE_MATH_H +#ifndef MATH_H_INCLUDED +#include <math.h> +#define MATH_H_INCLUDED 1 +#endif +#endif + + + +/** Default locale to use. +*/ +static const char locale_kw[] = { "C" }; + + + +/** Read double value from char string. + @param rp Address of result variable. + @param src String to process. + @param endptr Address of pointer variable. + A pointer to the first character not processed + is stored here. The function may also store + a NULL pointer here. + The pointer variable is probably left unchanged + on errors or if strtod() is not available on your + system (the sscanf() function is used as fallback). + @param atg Allow trailing garbage: + 0=no unprocessable trailing bytes allowed, + 1=trailing whitespaces allowed, + 2=any trailing characaters allowed. + @param erp Error report, may be NULL. + @return 1 on success, 0 on error. + + Error codes: + DK4_E_INVALID_ARGUMENTS if rp or src is NULL, + DK4_E_SYNTAX if there are unexpected characters in the + string, + DK4_E_MATH_OVERFLOW if a mathematical overflow occurs, + DK4_E_MATH_UNDERFLOW if a mathematical underflow occurs. +*/ + +static +int +dk4ma_internal_input_c8_double( + double *rp, + const char *src, + const char **endptr, + int atg, + dk4_er_t *erp +) +{ +#if DK4_HAVE_STRTOD || DK4_HAVE__STRTOD + double val = 0.0; + char *myend = NULL; + int back = 0; + int xerr = 0; + if ((NULL != rp) && (NULL != src)) { + errno = 0; +#if DK4_HAVE_STRTOD + val = strtod(src, &myend); +#else + val = _strtod(src, &myend); +#endif + xerr = errno; + if (NULL != endptr) { *endptr = myend; } + if (myend != src) { + switch (atg) { + case 2: { + back = 1; + } break; + case 1: { + if (NULL != dk4str8_start(myend, NULL)) { + dk4error_set_simple_error_code(erp, DK4_E_SYNTAX); + } else { + back = 1; + } + } break; + default: { + if ('\0' == *myend) { + back = 1; + } else { + dk4error_set_simple_error_code(erp, DK4_E_SYNTAX); + } + } break; + } + if (1 == back) { + if (ERANGE == xerr) { + if (HUGE_VAL == val) { + back = 0; + dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW); + } + if ((-HUGE_VAL) == val) { + back = 0; + dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW); + } + if (0.0 == val) { + back = 0; + dk4error_set_simple_error_code(erp, DK4_E_MATH_UNDERFLOW); + } + } + } + } else { + dk4error_set_simple_error_code(erp, DK4_E_SYNTAX); + } + if (1 == back) { + *rp = val; + } + } else { + dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS); + } + return back; +#else +#if DK4_USE_PRINTF_SCANF + double val = 0.0; + int back = 0; + if ((NULL != rp) && (NULL != src)) { + if (1 == sscanf(src, "%lf", &val)) { + *rp = val; + back = 1; + } else { + dk4error_set_simple_error_code(erp, DK4_E_SYNTAX); + } + } else { + dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS); + } + return back; +#else + dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED); + return 0; +#endif +#endif +} + + + +int +dk4ma_input_c8_double( + double *rp, + const char *src, + const char **endptr, + int atg, + dk4_er_t *erp +) +{ +#if (DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC) + char *oldloc = NULL; +#endif + int back = 0; +#if (DK4_HAVE_SETLOCALE) && defined(LC_NUMERIC) + oldloc = setlocale(LC_NUMERIC, NULL); + (void)setlocale(LC_NUMERIC, locale_kw); + back = dk4ma_internal_input_c8_double(rp, src, endptr, atg, erp); + (void)setlocale(LC_NUMERIC, oldloc); +#else + back = dk4ma_internal_input_c8_double(rp, src, endptr, atg, erp); +#endif + return back; +} + + |