Purpose

This function provides the mechanism for decrementing a character point, taking into account DBCS considerations.

Calling Sequence

void far pascal FSH_PREVCHAR(pBeg, ppStr)
 
char far * pBeg;
char far * far * ppStr;

Where

pBeg is a pointer to the beginning of a string.

ppStr is a pointer to the character pointer of a string.

The value is decremented appropriately upon return. If it is at the beginning of a string, the pointer is not decremented. If it points to the second byte of a DBCS character, it will be decremented to point to the first byte of the character.

Returns

There are no error returns.

Remarks

The FSD is responsible for verifying the string pointer and checking for segment boundaries.

Note: OS/2 does not validate input parameters. An FSD, therefore, should call FSH_PROBEBUF where appropriate.