183 lines
4.5 KiB
C
183 lines
4.5 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-2001, 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 uscnnf_p.c
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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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#include "uscanf_p.h"
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#include "ufmt_cmn.h"
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/* flag characters for u_scanf */
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#define FLAG_ASTERISK 0x002A
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#define FLAG_PAREN 0x0028
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#define ISFLAG(s) (s) == FLAG_ASTERISK || \
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(s) == FLAG_PAREN
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/* special characters for u_scanf */
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#define SPEC_DOLLARSIGN 0x0024
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/* unicode digits */
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#define DIGIT_ZERO 0x0030
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#define DIGIT_ONE 0x0031
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#define DIGIT_TWO 0x0032
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#define DIGIT_THREE 0x0033
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#define DIGIT_FOUR 0x0034
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#define DIGIT_FIVE 0x0035
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#define DIGIT_SIX 0x0036
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#define DIGIT_SEVEN 0x0037
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#define DIGIT_EIGHT 0x0038
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#define DIGIT_NINE 0x0039
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#define ISDIGIT(s) (s) == DIGIT_ZERO || \
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(s) == DIGIT_ONE || \
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(s) == DIGIT_TWO || \
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(s) == DIGIT_THREE || \
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(s) == DIGIT_FOUR || \
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(s) == DIGIT_FIVE || \
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(s) == DIGIT_SIX || \
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(s) == DIGIT_SEVEN || \
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(s) == DIGIT_EIGHT || \
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(s) == DIGIT_NINE
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/* u_scanf modifiers */
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#define MOD_H 0x0068
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#define MOD_LOWERL 0x006C
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#define MOD_L 0x004C
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#define ISMOD(s) (s) == MOD_H || \
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(s) == MOD_LOWERL || \
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(s) == MOD_L
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/* We parse the argument list in Unicode */
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int32_t
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u_scanf_parse_spec (const UChar *fmt,
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u_scanf_spec *spec)
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{
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const UChar *s = fmt;
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const UChar *backup;
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u_scanf_spec_info *info = &(spec->fInfo);
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/* initialize spec to default values */
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spec->fArgPos = -1;
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spec->fSkipArg = FALSE;
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info->fSpec = 0x0000;
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info->fWidth = -1;
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info->fPadChar = 0x0020;
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info->fIsLongDouble = FALSE;
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info->fIsShort = FALSE;
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info->fIsLong = FALSE;
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info->fIsLongLong = FALSE;
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/* skip over the initial '%' */
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s++;
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/* Check for positional argument */
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if(ISDIGIT(*s)) {
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/* Save the current position */
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backup = s;
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/* handle positional parameters */
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if(ISDIGIT(*s)) {
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spec->fArgPos = (int) (*s++ - DIGIT_ZERO);
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while(ISDIGIT(*s)) {
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spec->fArgPos *= 10;
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spec->fArgPos += (int) (*s++ - DIGIT_ZERO);
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}
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}
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/* if there is no '$', don't read anything */
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if(*s != SPEC_DOLLARSIGN) {
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spec->fArgPos = -1;
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s = backup;
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}
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/* munge the '$' */
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else
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s++;
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}
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/* Get any format flags */
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while(ISFLAG(*s)) {
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switch(*s++) {
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/* skip argument */
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case FLAG_ASTERISK:
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spec->fSkipArg = TRUE;
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break;
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/* pad character specified */
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case FLAG_PAREN:
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/* first four characters are hex values for pad char */
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info->fPadChar = (UChar)ufmt_digitvalue(*s++);
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info->fPadChar = (UChar)((info->fPadChar * 16) + ufmt_digitvalue(*s++));
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info->fPadChar = (UChar)((info->fPadChar * 16) + ufmt_digitvalue(*s++));
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info->fPadChar = (UChar)((info->fPadChar * 16) + ufmt_digitvalue(*s++));
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/* final character is ignored */
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s++;
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break;
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}
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}
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/* Get the width */
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if(ISDIGIT(*s)){
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info->fWidth = (int) (*s++ - DIGIT_ZERO);
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while(ISDIGIT(*s)) {
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info->fWidth *= 10;
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info->fWidth += (int) (*s++ - DIGIT_ZERO);
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}
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}
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/* Get any modifiers */
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if(ISMOD(*s)) {
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switch(*s++) {
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/* short */
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case MOD_H:
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info->fIsShort = TRUE;
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break;
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/* long or long long */
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case MOD_LOWERL:
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if(*s == MOD_LOWERL) {
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info->fIsLongLong = TRUE;
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/* skip over the next 'l' */
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s++;
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}
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else
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info->fIsLong = TRUE;
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break;
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/* long double */
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case MOD_L:
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info->fIsLongDouble = TRUE;
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break;
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}
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}
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/* finally, get the specifier letter */
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info->fSpec = *s++;
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/* return # of characters in this specifier */
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return (int32_t)(s - fmt);
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}
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