| // © 2016 and later: Unicode, Inc. and others. |
| // License & terms of use: http://www.unicode.org/copyright.html |
| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 2000-2012, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: uparse.c |
| * encoding: UTF-8 |
| * 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[10000]; |
| 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; |
| } |
| } |
| |
| /* too few fields? */ |
| 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); |
| } |
