152 lines
4.8 KiB
C
152 lines
4.8 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2000-2010, 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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* file name: uparse.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2000apr18
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* created by: Markus W. Scherer
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*
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* This file provides a parser for files that are delimited by one single
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* character like ';' or TAB. Example: the Unicode Character Properties files
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* like UnicodeData.txt are semicolon-delimited.
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*/
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#ifndef __UPARSE_H__
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#define __UPARSE_H__
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#include "unicode/utypes.h"
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/**
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* Is c an invariant-character whitespace?
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* @param c invariant character
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*/
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#define U_IS_INV_WHITESPACE(c) ((c)==' ' || (c)=='\t' || (c)=='\r' || (c)=='\n')
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U_CDECL_BEGIN
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/**
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* Skip space ' ' and TAB '\t' characters.
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*
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* @param s Pointer to characters.
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* @return Pointer to first character at or after s that is not a space or TAB.
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*/
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U_CAPI const char * U_EXPORT2
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u_skipWhitespace(const char *s);
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/**
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* Trim whitespace (including line endings) from the end of the string.
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*
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* @param s Pointer to the string.
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* @return Pointer to the new end of the string.
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*/
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U_CAPI char * U_EXPORT2
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u_rtrim(char *s);
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/** Function type for u_parseDelimitedFile(). */
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typedef void U_CALLCONV
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UParseLineFn(void *context,
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char *fields[][2],
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int32_t fieldCount,
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UErrorCode *pErrorCode);
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/**
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* Parser for files that are similar to UnicodeData.txt:
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* This function opens the file and reads it line by line. It skips empty lines
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* and comment lines that start with a '#'.
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* All other lines are separated into fields with one delimiter character
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* (semicolon for Unicode Properties files) between two fields. The last field in
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* a line does not need to be terminated with a delimiter.
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*
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* For each line, after segmenting it, a line function is called.
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* It gets passed the array of field start and limit pointers that is
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* passed into this parser and filled by it for each line.
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* For each field i of the line, the start pointer in fields[i][0]
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* points to the beginning of the field, while the limit pointer in fields[i][1]
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* points behind the field, i.e., to the delimiter or the line end.
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*
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* The context parameter of the line function is
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* the same as the one for the parse function.
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*
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* The line function may modify the contents of the fields including the
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* limit characters.
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*
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* If the file cannot be opened, or there is a parsing error or a field function
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* sets *pErrorCode, then the parser returns with *pErrorCode set to an error code.
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*/
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U_CAPI void U_EXPORT2
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u_parseDelimitedFile(const char *filename, char delimiter,
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char *fields[][2], int32_t fieldCount,
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UParseLineFn *lineFn, void *context,
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UErrorCode *pErrorCode);
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/**
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* Parse a string of code points like 0061 0308 0300.
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* s must end with either ';' or NUL.
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*
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* @return Number of code points.
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*/
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U_CAPI int32_t U_EXPORT2
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u_parseCodePoints(const char *s,
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uint32_t *dest, int32_t destCapacity,
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UErrorCode *pErrorCode);
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/**
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* Parse a list of code points like 0061 0308 0300
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* into a UChar * string.
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* s must end with either ';' or NUL.
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*
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* Set the first code point in *pFirst.
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*
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* @param s Input char * string.
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* @param dest Output string buffer.
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* @param destCapacity Capacity of dest in numbers of UChars.
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* @param pFirst If pFirst!=NULL the *pFirst will be set to the first
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* code point in the string.
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* @param pErrorCode ICU error code.
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* @return The length of the string in numbers of UChars.
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*/
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U_CAPI int32_t U_EXPORT2
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u_parseString(const char *s,
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UChar *dest, int32_t destCapacity,
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uint32_t *pFirst,
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UErrorCode *pErrorCode);
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/**
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* Parse a code point range like
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* 0085 or
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* 4E00..9FA5.
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*
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* s must contain such a range and end with either ';' or NUL.
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*
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* @return Length of code point range, end-start+1
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*/
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U_CAPI int32_t U_EXPORT2
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u_parseCodePointRange(const char *s,
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uint32_t *pStart, uint32_t *pEnd,
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UErrorCode *pErrorCode);
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/**
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* Same as u_parseCodePointRange() but the range may be terminated by
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* any character. The position of the terminating character is returned via
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* the *terminator output parameter.
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*/
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U_CAPI int32_t U_EXPORT2
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u_parseCodePointRangeAnyTerminator(const char *s,
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uint32_t *pStart, uint32_t *pEnd,
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const char **terminator,
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UErrorCode *pErrorCode);
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U_CAPI int32_t U_EXPORT2
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u_parseUTF8(const char *source, int32_t sLen, char *dest, int32_t destCapacity, UErrorCode *status);
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U_CDECL_END
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#endif
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