Validates the data entered in an F_DOUBLE field
| Call | ||
| #include <vv_doubl.h> | ||
| int vf_double(stp, picp, dfldp, cvbufp) | ||
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UCHAR *stp |
Pointer to the string containing the field data |
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| UCHAR *picp | Pointer to the picture associated with the string | |
| DFIELDPTR dfldp | Pointer to the floating point field to validate | |
| UCHAR *cvbufp | Pointer to conversion buffer | |
| Returns | ||
| 1 | The data is valid for this F_DOUBLE field. | |
| 0 | The data is invalid for this F_DOUBLE field | |
| Description
vf_double() performs several validation checks on the data. If the data does not pass a validation check, VAL_ERR is set. The form editor will then display the appropriate message. The following table lists the validation checks and the message displayed in the error window if the check fails. |
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| vf_double() checks for: | Message: | |
| Multiple decimal separators | MULT_POINTS | |
| Decimal separators in the exponent | POINTINEXP | |
| Multiple signs (for exponential notation, signs can occur in both the mantissa and the exponent) | MULT_SIGN | |
| Multiple exponential notation symbols (E) | MULT_EXP | |
| Embedded signs | SIGN_FIRST | |
| Field value too large to allow right justification | NO_RTJUST | |
| Embedded blanks (accepted between sign and first digit) | NO_BLANKS | |
| Value is outside the range specified for this field or value exceeds maximum double for the operating system | OUTOFRANGE | |
| If CHKTRUNCATE is ON for the field, values that cannot be redisplayed without losing precision | FLOATTRUNCATE | |
| Vermont Views validation messages are defined in vv_valmsg.c. | ||
| Related Functions
vf_bool(), vf_ch(), vf_date(), vf_dec(), vf_fill(), vf_int(), vf_long(), vf_req(), vf_st(), vf_time() |
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