95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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*
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* File uscanf.h
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*
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* Modification History:
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*
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* Date Name Description
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* 12/02/98 stephen Creation.
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* 03/13/99 stephen Modified for new C API.
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*******************************************************************************
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*/
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#ifndef USCANF_H
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#define USCANF_H
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#include "unicode/ustdio.h"
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#include "ufmt_cmn.h"
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/**
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* Struct encapsulating a single uscanf format specification.
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*/
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struct u_scanf_spec_info {
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UChar fSpec; /* Format specification */
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int32_t fWidth; /* Width */
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UChar fPadChar; /* Padding character */
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UBool fIsLongDouble; /* L flag */
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UBool fIsShort; /* h flag */
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UBool fIsLong; /* l flag */
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UBool fIsLongLong; /* ll flag */
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};
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typedef struct u_scanf_spec_info u_scanf_spec_info;
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/**
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* A u_scanf info function.
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* A u_scanf info is reponsible for reporting to u_scanf how many
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* arguments are required for the <TT>u_scanf_spec_info</TT> <TT>info</TT>,
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* and what their types are.
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* @param info A pointer to a <TT>uscan_info</TT> struct containing
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* information on the format specification.
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* @param argtypes The array to receive the types of arguments specified
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* by <TT>info</TT>.
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* @param n The number of available slots in the array <TT>argtypes</TT>
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* @return The number of arguments required by <TT>info</TT>.
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*/
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typedef int32_t (*u_scanf_info) (const u_scanf_spec_info *info,
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int32_t *argtypes,
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int32_t n);
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/**
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* A u_scanf handler function.
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* A u_scanf handler is responsible for handling a single u_scanf
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* format specification, for example 'd' or 's'.
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* @param stream The UFILE to which to write output.
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* @param info A pointer to a <TT>u_scanf_spec_info</TT> struct containing
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* information on the format specification.
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* @param args A pointer to the argument data
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* @param fmt A pointer to the first character in the format string
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* following the spec.
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* @param consumed On output, set to the number of characters consumed
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* in <TT>fmt</TT>.
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* @return The number of arguments converted and assigned, or -1 if an
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* error occurred.
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*/
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typedef int32_t (*u_scanf_handler) (UFILE *stream,
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const u_scanf_spec_info *info,
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ufmt_args *args,
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const UChar *fmt,
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int32_t *consumed);
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/**
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* Register a u_scanf handler function with u_scanf.
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* @param spec The format specififier handled by the handler <TT>func</TT>.
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* @param nfo A pointer to the <TT>u_scanf_info</TT> function used
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* to determine how many arguments are required for <TT>spec</TT>, and
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* what their types are.
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* @param handler A pointer to the <TT>u_scanf_handler</TT> function.
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* @return 0 if successful
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*/
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int32_t
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u_scanf_register_handler (UChar spec,
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u_scanf_info info,
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u_scanf_handler handler);
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#endif
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