/*
*******************************************************************************
*
* Copyright (C) 2000-2012, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: uparse.c
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2000apr18
* created by: Markus W. Scherer
*
* This file provides a parser for files that are delimited by one single
* character like ';' or TAB. Example: the Unicode Character Properties files
* like UnicodeData.txt are semicolon-delimited.
*/
#include "unicode/utypes.h"
#include "unicode/uchar.h"
#include "unicode/ustring.h"
#include "unicode/utf16.h"
#include "cstring.h"
#include "filestrm.h"
#include "uparse.h"
#include "ustr_imp.h"
#include <stdio.h>
U_CAPI const char * U_EXPORT2
u_skipWhitespace(const char *s) {
while(U_IS_INV_WHITESPACE(*s)) {
++s;
}
return s;
}
U_CAPI char * U_EXPORT2
u_rtrim(char *s) {
char *end=uprv_strchr(s, 0);
while(s<end && U_IS_INV_WHITESPACE(*(end-1))) {
*--end = 0;
}
return end;
}
/*
* If the string starts with # @missing: then return the pointer to the
* following non-whitespace character.
* Otherwise return the original pointer.
* Unicode 5.0 adds such lines in some data files to document
* default property values.
* Poor man's regex for variable amounts of white space.
*/
static const char *
getMissingLimit(const char *s) {
const char *s0=s;
if(
*(s=u_skipWhitespace(s))=='#' &&
*(s=u_skipWhitespace(s+1))=='@' &&
0==strncmp((s=u_skipWhitespace(s+1)), "missing", 7) &&
*(s=u_skipWhitespace(s+7))==':'
) {
return u_skipWhitespace(s+1);
} else {
return s0;
}
}
U_CAPI void U_EXPORT2
u_parseDelimitedFile(const char *filename, char delimiter,
char *fields[][2], int32_t fieldCount,
UParseLineFn *lineFn, void *context,
UErrorCode *pErrorCode) {
FileStream *file;
char line[300];
char *start, *limit;
int32_t i, length;
if(U_FAILURE(*pErrorCode)) {
return;
}
if(fields==NULL || lineFn==NULL || fieldCount<=0) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return;
}
if(filename==NULL || *filename==0 || (*filename=='-' && filename[1]==0)) {
filename=NULL;
file=T_FileStream_stdin();
} else {
file=T_FileStream_open(filename, "r");
}
if(file==NULL) {
*pErrorCode=U_FILE_ACCESS_ERROR;
return;
}
while(T_FileStream_readLine(file, line, sizeof(line))!=NULL) {
/* remove trailing newline characters */
length=(int32_t)(u_rtrim(line)-line);
/*
* detect a line with # @missing:
* start parsing after that, or else from the beginning of the line
* set the default warning for @missing lines
*/
start=(char *)getMissingLimit(line);
if(start==line) {
*pErrorCode=U_ZERO_ERROR;
} else {
*pErrorCode=U_USING_DEFAULT_WARNING;
}
/* skip this line if it is empty or a comment */
if(*start==0 || *start=='#') {
continue;
}
/* remove in-line comments */
limit=uprv_strchr(start, '#');
if(limit!=NULL) {
/* get white space before the pound sign */
while(limit>start && U_IS_INV_WHITESPACE(*(limit-1))) {
--limit;
}
/* truncate the line */
*limit=0;
}
/* skip lines with only whitespace */
if(u_skipWhitespace(start)[0]==0) {
continue;
}
/* for each field, call the corresponding field function */
for(i=0; i<fieldCount; ++i) {
/* set the limit pointer of this field */
limit=start;
while(*limit!=delimiter && *limit!=0) {
++limit;
}
/* set the field start and limit in the fields array */
fields[i][0]=start;
fields[i][1]=limit;
/* set start to the beginning of the next field, if any */
start=limit;
if(*start!=0) {
++start;
} else if(i+1<fieldCount) {
*pErrorCode=U_PARSE_ERROR;
limit=line+length;
i=fieldCount;
break;
}
}
/* error in a field function? */
if(U_FAILURE(*pErrorCode)) {
break;
}
/* call the field function */
lineFn(context, fields, fieldCount, pErrorCode);
if(U_FAILURE(*pErrorCode)) {
break;
}
}
if(filename!=NULL) {
T_FileStream_close(file);
}
}
/*
* parse a list of code points
* store them as a UTF-32 string in dest[destCapacity]
* return the number of code points
*/
U_CAPI int32_t U_EXPORT2
u_parseCodePoints(const char *s,
uint32_t *dest, int32_t destCapacity,
UErrorCode *pErrorCode) {
char *end;
uint32_t value;
int32_t count;
if(U_FAILURE(*pErrorCode)) {
return 0;
}
if(s==NULL || destCapacity<0 || (destCapacity>0 && dest==NULL)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
count=0;
for(;;) {
s=u_skipWhitespace(s);
if(*s==';' || *s==0) {
return count;
}
/* read one code point */
value=(uint32_t)uprv_strtoul(s, &end, 16);
if(end<=s || (!U_IS_INV_WHITESPACE(*end) && *end!=';' && *end!=0) || value>=0x110000) {
*pErrorCode=U_PARSE_ERROR;
return 0;
}
/* append it to the destination array */
if(count<destCapacity) {
dest[count++]=value;
} else {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
/* go to the following characters */
s=end;
}
}
/*
* parse a list of code points
* store them as a string in dest[destCapacity]
* set the first code point in *pFirst
* @return The length of the string in numbers of UChars.
*/
U_CAPI int32_t U_EXPORT2
u_parseString(const char *s,
UChar *dest, int32_t destCapacity,
uint32_t *pFirst,
UErrorCode *pErrorCode) {
char *end;
uint32_t value;
int32_t destLength;
if(U_FAILURE(*pErrorCode)) {
return 0;
}
if(s==NULL || destCapacity<0 || (destCapacity>0 && dest==NULL)) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
if(pFirst!=NULL) {
*pFirst=0xffffffff;
}
destLength=0;
for(;;) {
s=u_skipWhitespace(s);
if(*s==';' || *s==0) {
if(destLength<destCapacity) {
dest[destLength]=0;
} else if(destLength==destCapacity) {
*pErrorCode=U_STRING_NOT_TERMINATED_WARNING;
} else {
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
}
return destLength;
}
/* read one code point */
value=(uint32_t)uprv_strtoul(s, &end, 16);
if(end<=s || (!U_IS_INV_WHITESPACE(*end) && *end!=';' && *end!=0) || value>=0x110000) {
*pErrorCode=U_PARSE_ERROR;
return 0;
}
/* store the first code point */
if(pFirst!=NULL) {
*pFirst=value;
pFirst=NULL;
}
/* append it to the destination array */
if((destLength+U16_LENGTH(value))<=destCapacity) {
U16_APPEND_UNSAFE(dest, destLength, value);
} else {
destLength+=U16_LENGTH(value);
}
/* go to the following characters */
s=end;
}
}
/* read a range like start or start..end */
U_CAPI int32_t U_EXPORT2
u_parseCodePointRangeAnyTerminator(const char *s,
uint32_t *pStart, uint32_t *pEnd,
const char **terminator,
UErrorCode *pErrorCode) {
char *end;
uint32_t value;
if(U_FAILURE(*pErrorCode)) {
return 0;
}
if(s==NULL || pStart==NULL || pEnd==NULL) {
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
return 0;
}
/* read the start code point */
s=u_skipWhitespace(s);
value=(uint32_t)uprv_strtoul(s, &end, 16);
if(end<=s || value>=0x110000) {
*pErrorCode=U_PARSE_ERROR;
return 0;
}
*pStart=*pEnd=value;
/* is there a "..end"? */
s=u_skipWhitespace(end);
if(*s!='.' || s[1]!='.') {
*terminator=end;
return 1;
}
s=u_skipWhitespace(s+2);
/* read the end code point */
value=(uint32_t)uprv_strtoul(s, &end, 16);
if(end<=s || value>=0x110000) {
*pErrorCode=U_PARSE_ERROR;
return 0;
}
*pEnd=value;
/* is this a valid range? */
if(value<*pStart) {
*pErrorCode=U_PARSE_ERROR;
return 0;
}
*terminator=end;
return value-*pStart+1;
}
U_CAPI int32_t U_EXPORT2
u_parseCodePointRange(const char *s,
uint32_t *pStart, uint32_t *pEnd,
UErrorCode *pErrorCode) {
const char *terminator;
int32_t rangeLength=
u_parseCodePointRangeAnyTerminator(s, pStart, pEnd, &terminator, pErrorCode);
if(U_SUCCESS(*pErrorCode)) {
terminator=u_skipWhitespace(terminator);
if(*terminator!=';' && *terminator!=0) {
*pErrorCode=U_PARSE_ERROR;
return 0;
}
}
return rangeLength;
}
U_CAPI int32_t U_EXPORT2
u_parseUTF8(const char *source, int32_t sLen, char *dest, int32_t destCapacity, UErrorCode *status) {
const char *read = source;
int32_t i = 0;
unsigned int value = 0;
if(sLen == -1) {
sLen = (int32_t)strlen(source);
}
while(read < source+sLen) {
sscanf(read, "%2x", &value);
if(i < destCapacity) {
dest[i] = (char)value;
}
i++;
read += 2;
}
return u_terminateChars(dest, destCapacity, i, status);
}