/*
*******************************************************************************
*
* Copyright (C) 1998-2010, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
*
* File uscnnf_p.c
*
* Modification History:
*
* Date Name Description
* 12/02/98 stephen Creation.
* 03/13/99 stephen Modified for new C API.
*******************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/uchar.h"
#include "unicode/ustring.h"
#include "unicode/unum.h"
#include "unicode/udat.h"
#include "unicode/uset.h"
#include "uscanf.h"
#include "ufmt_cmn.h"
#include "ufile.h"
#include "locbund.h"
#include "cmemory.h"
#include "ustr_cnv.h"
/* flag characters for u_scanf */
#define FLAG_ASTERISK 0x002A
#define FLAG_PAREN 0x0028
#define ISFLAG(s) (s) == FLAG_ASTERISK || \
(s) == FLAG_PAREN
/* special characters for u_scanf */
#define SPEC_DOLLARSIGN 0x0024
/* unicode digits */
#define DIGIT_ZERO 0x0030
#define DIGIT_ONE 0x0031
#define DIGIT_TWO 0x0032
#define DIGIT_THREE 0x0033
#define DIGIT_FOUR 0x0034
#define DIGIT_FIVE 0x0035
#define DIGIT_SIX 0x0036
#define DIGIT_SEVEN 0x0037
#define DIGIT_EIGHT 0x0038
#define DIGIT_NINE 0x0039
#define ISDIGIT(s) (s) == DIGIT_ZERO || \
(s) == DIGIT_ONE || \
(s) == DIGIT_TWO || \
(s) == DIGIT_THREE || \
(s) == DIGIT_FOUR || \
(s) == DIGIT_FIVE || \
(s) == DIGIT_SIX || \
(s) == DIGIT_SEVEN || \
(s) == DIGIT_EIGHT || \
(s) == DIGIT_NINE
/* u_scanf modifiers */
#define MOD_H 0x0068
#define MOD_LOWERL 0x006C
#define MOD_L 0x004C
#define ISMOD(s) (s) == MOD_H || \
(s) == MOD_LOWERL || \
(s) == MOD_L
/**
* Struct encapsulating a single uscanf format specification.
*/
typedef struct u_scanf_spec_info {
int32_t fWidth; /* Width */
UChar fSpec; /* Format specification */
UChar fPadChar; /* Padding character */
UBool fSkipArg; /* TRUE if arg should be skipped */
UBool fIsLongDouble; /* L flag */
UBool fIsShort; /* h flag */
UBool fIsLong; /* l flag */
UBool fIsLongLong; /* ll flag */
UBool fIsString; /* TRUE if this is a NULL-terminated string. */
} u_scanf_spec_info;
/**
* Struct encapsulating a single u_scanf format specification.
*/
typedef struct u_scanf_spec {
u_scanf_spec_info fInfo; /* Information on this spec */
int32_t fArgPos; /* Position of data in arg list */
} u_scanf_spec;
/**
* Parse a single u_scanf format specifier in Unicode.
* @param fmt A pointer to a '%' character in a u_scanf format specification.
* @param spec A pointer to a <TT>u_scanf_spec</TT> to receive the parsed
* format specifier.
* @return The number of characters contained in this specifier.
*/
static int32_t
u_scanf_parse_spec (const UChar *fmt,
u_scanf_spec *spec)
{
const UChar *s = fmt;
const UChar *backup;
u_scanf_spec_info *info = &(spec->fInfo);
/* initialize spec to default values */
spec->fArgPos = -1;
info->fWidth = -1;
info->fSpec = 0x0000;
info->fPadChar = 0x0020;
info->fSkipArg = FALSE;
info->fIsLongDouble = FALSE;
info->fIsShort = FALSE;
info->fIsLong = FALSE;
info->fIsLongLong = FALSE;
info->fIsString = TRUE;
/* skip over the initial '%' */
s++;
/* Check for positional argument */
if(ISDIGIT(*s)) {
/* Save the current position */
backup = s;
/* handle positional parameters */
if(ISDIGIT(*s)) {
spec->fArgPos = (int) (*s++ - DIGIT_ZERO);
while(ISDIGIT(*s)) {
spec->fArgPos *= 10;
spec->fArgPos += (int) (*s++ - DIGIT_ZERO);
}
}
/* if there is no '$', don't read anything */
if(*s != SPEC_DOLLARSIGN) {
spec->fArgPos = -1;
s = backup;
}
/* munge the '$' */
else
s++;
}
/* Get any format flags */
while(ISFLAG(*s)) {
switch(*s++) {
/* skip argument */
case FLAG_ASTERISK:
info->fSkipArg = TRUE;
break;
/* pad character specified */
case FLAG_PAREN:
/* first four characters are hex values for pad char */
info->fPadChar = (UChar)ufmt_digitvalue(*s++);
info->fPadChar = (UChar)((info->fPadChar * 16) + ufmt_digitvalue(*s++));
info->fPadChar = (UChar)((info->fPadChar * 16) + ufmt_digitvalue(*s++));
info->fPadChar = (UChar)((info->fPadChar * 16) + ufmt_digitvalue(*s++));
/* final character is ignored */
s++;
break;
}
}
/* Get the width */
if(ISDIGIT(*s)){
info->fWidth = (int) (*s++ - DIGIT_ZERO);
while(ISDIGIT(*s)) {
info->fWidth *= 10;
info->fWidth += (int) (*s++ - DIGIT_ZERO);
}
}
/* Get any modifiers */
if(ISMOD(*s)) {
switch(*s++) {
/* short */
case MOD_H:
info->fIsShort = TRUE;
break;
/* long or long long */
case MOD_LOWERL:
if(*s == MOD_LOWERL) {
info->fIsLongLong = TRUE;
/* skip over the next 'l' */
s++;
}
else
info->fIsLong = TRUE;
break;
/* long double */
case MOD_L:
info->fIsLongDouble = TRUE;
break;
}
}
/* finally, get the specifier letter */
info->fSpec = *s++;
/* return # of characters in this specifier */
return (int32_t)(s - fmt);
}
#define UP_PERCENT 0x0025
/* ANSI style formatting */
/* Use US-ASCII characters only for formatting */
/* % */
#define UFMT_SIMPLE_PERCENT {ufmt_simple_percent, u_scanf_simple_percent_handler}
/* s */
#define UFMT_STRING {ufmt_string, u_scanf_string_handler}
/* c */
#define UFMT_CHAR {ufmt_string, u_scanf_char_handler}
/* d, i */
#define UFMT_INT {ufmt_int, u_scanf_integer_handler}
/* u */
#define UFMT_UINT {ufmt_int, u_scanf_uinteger_handler}
/* o */
#define UFMT_OCTAL {ufmt_int, u_scanf_octal_handler}
/* x, X */
#define UFMT_HEX {ufmt_int, u_scanf_hex_handler}
/* f */
#define UFMT_DOUBLE {ufmt_double, u_scanf_double_handler}
/* e, E */
#define UFMT_SCIENTIFIC {ufmt_double, u_scanf_scientific_handler}
/* g, G */
#define UFMT_SCIDBL {ufmt_double, u_scanf_scidbl_handler}
/* n */
#define UFMT_COUNT {ufmt_count, u_scanf_count_handler}
/* [ */
#define UFMT_SCANSET {ufmt_string, u_scanf_scanset_handler}
/* non-ANSI extensions */
/* Use US-ASCII characters only for formatting */
/* p */
#define UFMT_POINTER {ufmt_pointer, u_scanf_pointer_handler}
/* V */
#define UFMT_SPELLOUT {ufmt_double, u_scanf_spellout_handler}
/* P */
#define UFMT_PERCENT {ufmt_double, u_scanf_percent_handler}
/* C K is old format */
#define UFMT_UCHAR {ufmt_uchar, u_scanf_uchar_handler}
/* S U is old format */
#define UFMT_USTRING {ufmt_ustring, u_scanf_ustring_handler}
#define UFMT_EMPTY {ufmt_empty, NULL}
/**
* A u_scanf handler function.
* A u_scanf handler is responsible for handling a single u_scanf
* format specification, for example 'd' or 's'.
* @param stream The UFILE to which to write output.
* @param info A pointer to a <TT>u_scanf_spec_info</TT> struct containing
* information on the format specification.
* @param args A pointer to the argument data
* @param fmt A pointer to the first character in the format string
* following the spec.
* @param fmtConsumed On output, set to the number of characters consumed
* in <TT>fmt</TT>. Do nothing, if the argument isn't variable width.
* @param argConverted The number of arguments converted and assigned, or -1 if an
* error occurred.
* @return The number of code points consumed during reading.
*/
typedef int32_t (*u_scanf_handler) (UFILE *stream,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted);
typedef struct u_scanf_info {
ufmt_type_info info;
u_scanf_handler handler;
} u_scanf_info;
#define USCANF_NUM_FMT_HANDLERS 108
#define USCANF_SYMBOL_BUFFER_SIZE 8
/* We do not use handlers for 0-0x1f */
#define USCANF_BASE_FMT_HANDLERS 0x20
static int32_t
u_scanf_skip_leading_ws(UFILE *input,
UChar pad)
{
UChar c;
int32_t count = 0;
UBool isNotEOF;
/* skip all leading ws in the input */
while( (isNotEOF = ufile_getch(input, &c)) && (c == pad || u_isWhitespace(c)) )
{
count++;
}
/* put the final character back on the input */
if(isNotEOF)
u_fungetc(c, input);
return count;
}
/* TODO: Is always skipping the prefix symbol as a positive sign a good idea in all locales? */
static int32_t
u_scanf_skip_leading_positive_sign(UFILE *input,
UNumberFormat *format,
UErrorCode *status)
{
UChar c;
int32_t count = 0;
UBool isNotEOF;
UChar plusSymbol[USCANF_SYMBOL_BUFFER_SIZE];
int32_t symbolLen;
UErrorCode localStatus = U_ZERO_ERROR;
if (U_SUCCESS(*status)) {
symbolLen = unum_getSymbol(format,
UNUM_PLUS_SIGN_SYMBOL,
plusSymbol,
sizeof(plusSymbol)/sizeof(*plusSymbol),
&localStatus);
if (U_SUCCESS(localStatus)) {
/* skip all leading ws in the input */
while( (isNotEOF = ufile_getch(input, &c)) && (count < symbolLen && c == plusSymbol[count]) )
{
count++;
}
/* put the final character back on the input */
if(isNotEOF) {
u_fungetc(c, input);
}
}
}
return count;
}
static int32_t
u_scanf_simple_percent_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
/* make sure the next character in the input is a percent */
*argConverted = 0;
if(u_fgetc(input) != 0x0025) {
*argConverted = -1;
}
return 1;
}
static int32_t
u_scanf_count_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
/* in the special case of count, the u_scanf_spec_info's width */
/* will contain the # of items converted thus far */
if (!info->fSkipArg) {
if (info->fIsShort)
*(int16_t*)(args[0].ptrValue) = (int16_t)(UINT16_MAX & info->fWidth);
else if (info->fIsLongLong)
*(int64_t*)(args[0].ptrValue) = info->fWidth;
else
*(int32_t*)(args[0].ptrValue) = (int32_t)(UINT32_MAX & info->fWidth);
}
*argConverted = 0;
/* we converted 0 args */
return 0;
}
static int32_t
u_scanf_double_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
double num;
UNumberFormat *format;
int32_t parsePos = 0;
int32_t skipped;
UErrorCode status = U_ZERO_ERROR;
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* get the formatter */
format = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_DECIMAL);
/* handle error */
if(format == 0)
return 0;
/* Skip the positive prefix. ICU normally can't handle this due to strict parsing. */
skipped += u_scanf_skip_leading_positive_sign(input, format, &status);
/* parse the number */
num = unum_parseDouble(format, input->str.fPos, len, &parsePos, &status);
if (!info->fSkipArg) {
if (info->fIsLong)
*(double*)(args[0].ptrValue) = num;
else if (info->fIsLongDouble)
*(long double*)(args[0].ptrValue) = num;
else
*(float*)(args[0].ptrValue) = (float)num;
}
/* mask off any necessary bits */
/* if(! info->fIsLong_double)
num &= DBL_MAX;*/
/* update the input's position to reflect consumed data */
input->str.fPos += parsePos;
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return parsePos + skipped;
}
#define UPRINTF_SYMBOL_BUFFER_SIZE 8
static int32_t
u_scanf_scientific_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
double num;
UNumberFormat *format;
int32_t parsePos = 0;
int32_t skipped;
UErrorCode status = U_ZERO_ERROR;
UChar srcExpBuf[UPRINTF_SYMBOL_BUFFER_SIZE];
int32_t srcLen, expLen;
UChar expBuf[UPRINTF_SYMBOL_BUFFER_SIZE];
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* get the formatter */
format = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_SCIENTIFIC);
/* handle error */
if(format == 0)
return 0;
/* set the appropriate flags on the formatter */
srcLen = unum_getSymbol(format,
UNUM_EXPONENTIAL_SYMBOL,
srcExpBuf,
sizeof(srcExpBuf),
&status);
/* Upper/lower case the e */
if (info->fSpec == (UChar)0x65 /* e */) {
expLen = u_strToLower(expBuf, (int32_t)sizeof(expBuf),
srcExpBuf, srcLen,
input->str.fBundle.fLocale,
&status);
}
else {
expLen = u_strToUpper(expBuf, (int32_t)sizeof(expBuf),
srcExpBuf, srcLen,
input->str.fBundle.fLocale,
&status);
}
unum_setSymbol(format,
UNUM_EXPONENTIAL_SYMBOL,
expBuf,
expLen,
&status);
/* Skip the positive prefix. ICU normally can't handle this due to strict parsing. */
skipped += u_scanf_skip_leading_positive_sign(input, format, &status);
/* parse the number */
num = unum_parseDouble(format, input->str.fPos, len, &parsePos, &status);
if (!info->fSkipArg) {
if (info->fIsLong)
*(double*)(args[0].ptrValue) = num;
else if (info->fIsLongDouble)
*(long double*)(args[0].ptrValue) = num;
else
*(float*)(args[0].ptrValue) = (float)num;
}
/* mask off any necessary bits */
/* if(! info->fIsLong_double)
num &= DBL_MAX;*/
/* update the input's position to reflect consumed data */
input->str.fPos += parsePos;
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return parsePos + skipped;
}
static int32_t
u_scanf_scidbl_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
double num;
UNumberFormat *scientificFormat, *genericFormat;
/*int32_t scientificResult, genericResult;*/
double scientificResult, genericResult;
int32_t scientificParsePos = 0, genericParsePos = 0, parsePos = 0;
int32_t skipped;
UErrorCode scientificStatus = U_ZERO_ERROR;
UErrorCode genericStatus = U_ZERO_ERROR;
/* since we can't determine by scanning the characters whether */
/* a number was formatted in the 'f' or 'g' styles, parse the */
/* string with both formatters, and assume whichever one */
/* parsed the most is the correct formatter to use */
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* get the formatters */
scientificFormat = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_SCIENTIFIC);
genericFormat = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_DECIMAL);
/* handle error */
if(scientificFormat == 0 || genericFormat == 0)
return 0;
/* Skip the positive prefix. ICU normally can't handle this due to strict parsing. */
skipped += u_scanf_skip_leading_positive_sign(input, genericFormat, &genericStatus);
/* parse the number using each format*/
scientificResult = unum_parseDouble(scientificFormat, input->str.fPos, len,
&scientificParsePos, &scientificStatus);
genericResult = unum_parseDouble(genericFormat, input->str.fPos, len,
&genericParsePos, &genericStatus);
/* determine which parse made it farther */
if(scientificParsePos > genericParsePos) {
/* stash the result in num */
num = scientificResult;
/* update the input's position to reflect consumed data */
parsePos += scientificParsePos;
}
else {
/* stash the result in num */
num = genericResult;
/* update the input's position to reflect consumed data */
parsePos += genericParsePos;
}
input->str.fPos += parsePos;
if (!info->fSkipArg) {
if (info->fIsLong)
*(double*)(args[0].ptrValue) = num;
else if (info->fIsLongDouble)
*(long double*)(args[0].ptrValue) = num;
else
*(float*)(args[0].ptrValue) = (float)num;
}
/* mask off any necessary bits */
/* if(! info->fIsLong_double)
num &= DBL_MAX;*/
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return parsePos + skipped;
}
static int32_t
u_scanf_integer_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
void *num = (void*) (args[0].ptrValue);
UNumberFormat *format;
int32_t parsePos = 0;
int32_t skipped;
UErrorCode status = U_ZERO_ERROR;
int64_t result;
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* get the formatter */
format = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_DECIMAL);
/* handle error */
if(format == 0)
return 0;
/* Skip the positive prefix. ICU normally can't handle this due to strict parsing. */
skipped += u_scanf_skip_leading_positive_sign(input, format, &status);
/* parse the number */
result = unum_parseInt64(format, input->str.fPos, len, &parsePos, &status);
/* mask off any necessary bits */
if (!info->fSkipArg) {
if (info->fIsShort)
*(int16_t*)num = (int16_t)(UINT16_MAX & result);
else if (info->fIsLongLong)
*(int64_t*)num = result;
else
*(int32_t*)num = (int32_t)(UINT32_MAX & result);
}
/* update the input's position to reflect consumed data */
input->str.fPos += parsePos;
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return parsePos + skipped;
}
static int32_t
u_scanf_uinteger_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
/* TODO Fix this when Numberformat handles uint64_t */
return u_scanf_integer_handler(input, info, args, fmt, fmtConsumed, argConverted);
}
static int32_t
u_scanf_percent_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
double num;
UNumberFormat *format;
int32_t parsePos = 0;
int32_t skipped;
UErrorCode status = U_ZERO_ERROR;
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* get the formatter */
format = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_PERCENT);
/* handle error */
if(format == 0)
return 0;
/* Skip the positive prefix. ICU normally can't handle this due to strict parsing. */
skipped += u_scanf_skip_leading_positive_sign(input, format, &status);
/* parse the number */
num = unum_parseDouble(format, input->str.fPos, len, &parsePos, &status);
if (!info->fSkipArg) {
*(double*)(args[0].ptrValue) = num;
}
/* mask off any necessary bits */
/* if(! info->fIsLong_double)
num &= DBL_MAX;*/
/* update the input's position to reflect consumed data */
input->str.fPos += parsePos;
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return parsePos;
}
static int32_t
u_scanf_string_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
const UChar *source;
UConverter *conv;
char *arg = (char*)(args[0].ptrValue);
char *alias = arg;
char *limit;
UErrorCode status = U_ZERO_ERROR;
int32_t count;
int32_t skipped = 0;
UChar c;
UBool isNotEOF = FALSE;
/* skip all ws in the input */
if (info->fIsString) {
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
}
/* get the string one character at a time, truncating to the width */
count = 0;
/* open the default converter */
conv = u_getDefaultConverter(&status);
if(U_FAILURE(status))
return -1;
while( (info->fWidth == -1 || count < info->fWidth)
&& (isNotEOF = ufile_getch(input, &c))
&& (!info->fIsString || (c != info->fPadChar && !u_isWhitespace(c))))
{
if (!info->fSkipArg) {
/* put the character from the input onto the target */
source = &c;
/* Since we do this one character at a time, do it this way. */
if (info->fWidth > 0) {
limit = alias + info->fWidth - count;
}
else {
limit = alias + ucnv_getMaxCharSize(conv);
}
/* convert the character to the default codepage */
ucnv_fromUnicode(conv, &alias, limit, &source, source + 1,
NULL, TRUE, &status);
if(U_FAILURE(status)) {
/* clean up */
u_releaseDefaultConverter(conv);
return -1;
}
}
/* increment the count */
++count;
}
/* put the final character we read back on the input */
if (!info->fSkipArg) {
if ((info->fWidth == -1 || count < info->fWidth) && isNotEOF)
u_fungetc(c, input);
/* add the terminator */
if (info->fIsString) {
*alias = 0x00;
}
}
/* clean up */
u_releaseDefaultConverter(conv);
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return count + skipped;
}
static int32_t
u_scanf_char_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
if (info->fWidth < 0) {
info->fWidth = 1;
}
info->fIsString = FALSE;
return u_scanf_string_handler(input, info, args, fmt, fmtConsumed, argConverted);
}
static int32_t
u_scanf_ustring_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
UChar *arg = (UChar*)(args[0].ptrValue);
UChar *alias = arg;
int32_t count;
int32_t skipped = 0;
UChar c;
UBool isNotEOF = FALSE;
/* skip all ws in the input */
if (info->fIsString) {
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
}
/* get the string one character at a time, truncating to the width */
count = 0;
while( (info->fWidth == -1 || count < info->fWidth)
&& (isNotEOF = ufile_getch(input, &c))
&& (!info->fIsString || (c != info->fPadChar && !u_isWhitespace(c))))
{
/* put the character from the input onto the target */
if (!info->fSkipArg) {
*alias++ = c;
}
/* increment the count */
++count;
}
/* put the final character we read back on the input */
if (!info->fSkipArg) {
if((info->fWidth == -1 || count < info->fWidth) && isNotEOF) {
u_fungetc(c, input);
}
/* add the terminator */
if (info->fIsString) {
*alias = 0x0000;
}
}
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return count + skipped;
}
static int32_t
u_scanf_uchar_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
if (info->fWidth < 0) {
info->fWidth = 1;
}
info->fIsString = FALSE;
return u_scanf_ustring_handler(input, info, args, fmt, fmtConsumed, argConverted);
}
static int32_t
u_scanf_spellout_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
double num;
UNumberFormat *format;
int32_t parsePos = 0;
int32_t skipped;
UErrorCode status = U_ZERO_ERROR;
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* get the formatter */
format = u_locbund_getNumberFormat(&input->str.fBundle, UNUM_SPELLOUT);
/* handle error */
if(format == 0)
return 0;
/* Skip the positive prefix. ICU normally can't handle this due to strict parsing. */
/* This is not applicable to RBNF. */
/*skipped += u_scanf_skip_leading_positive_sign(input, format, &status);*/
/* parse the number */
num = unum_parseDouble(format, input->str.fPos, len, &parsePos, &status);
if (!info->fSkipArg) {
*(double*)(args[0].ptrValue) = num;
}
/* mask off any necessary bits */
/* if(! info->fIsLong_double)
num &= DBL_MAX;*/
/* update the input's position to reflect consumed data */
input->str.fPos += parsePos;
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return parsePos + skipped;
}
static int32_t
u_scanf_hex_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
int32_t skipped;
void *num = (void*) (args[0].ptrValue);
int64_t result;
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* check for alternate form */
if( *(input->str.fPos) == 0x0030 &&
(*(input->str.fPos + 1) == 0x0078 || *(input->str.fPos + 1) == 0x0058) ) {
/* skip the '0' and 'x' or 'X' if present */
input->str.fPos += 2;
len -= 2;
}
/* parse the number */
result = ufmt_uto64(input->str.fPos, &len, 16);
/* update the input's position to reflect consumed data */
input->str.fPos += len;
/* mask off any necessary bits */
if (!info->fSkipArg) {
if (info->fIsShort)
*(int16_t*)num = (int16_t)(UINT16_MAX & result);
else if (info->fIsLongLong)
*(int64_t*)num = result;
else
*(int32_t*)num = (int32_t)(UINT32_MAX & result);
}
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return len + skipped;
}
static int32_t
u_scanf_octal_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
int32_t skipped;
void *num = (void*) (args[0].ptrValue);
int64_t result;
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1)
len = ufmt_min(len, info->fWidth);
/* parse the number */
result = ufmt_uto64(input->str.fPos, &len, 8);
/* update the input's position to reflect consumed data */
input->str.fPos += len;
/* mask off any necessary bits */
if (!info->fSkipArg) {
if (info->fIsShort)
*(int16_t*)num = (int16_t)(UINT16_MAX & result);
else if (info->fIsLongLong)
*(int64_t*)num = result;
else
*(int32_t*)num = (int32_t)(UINT32_MAX & result);
}
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return len + skipped;
}
static int32_t
u_scanf_pointer_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
int32_t len;
int32_t skipped;
void *result;
void **p = (void**)(args[0].ptrValue);
/* skip all ws in the input */
skipped = u_scanf_skip_leading_ws(input, info->fPadChar);
/* fill the input's internal buffer */
ufile_fill_uchar_buffer(input);
/* determine the size of the input's buffer */
len = (int32_t)(input->str.fLimit - input->str.fPos);
/* truncate to the width, if specified */
if(info->fWidth != -1) {
len = ufmt_min(len, info->fWidth);
}
/* Make sure that we don't consume too much */
if (len > (int32_t)(sizeof(void*)*2)) {
len = (int32_t)(sizeof(void*)*2);
}
/* parse the pointer - assign to temporary value */
result = ufmt_utop(input->str.fPos, &len);
if (!info->fSkipArg) {
*p = result;
}
/* update the input's position to reflect consumed data */
input->str.fPos += len;
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return len + skipped;
}
static int32_t
u_scanf_scanset_handler(UFILE *input,
u_scanf_spec_info *info,
ufmt_args *args,
const UChar *fmt,
int32_t *fmtConsumed,
int32_t *argConverted)
{
USet *scanset;
UErrorCode status = U_ZERO_ERROR;
int32_t chLeft = INT32_MAX;
UChar32 c;
UChar *alias = (UChar*) (args[0].ptrValue);
UBool isNotEOF = FALSE;
UBool readCharacter = FALSE;
/* Create an empty set */
scanset = uset_open(0, -1);
/* Back up one to get the [ */
fmt--;
/* truncate to the width, if specified and alias the target */
if(info->fWidth >= 0) {
chLeft = info->fWidth;
}
/* parse the scanset from the fmt string */
*fmtConsumed = uset_applyPattern(scanset, fmt, -1, 0, &status);
/* verify that the parse was successful */
if (U_SUCCESS(status)) {
c=0;
/* grab characters one at a time and make sure they are in the scanset */
while(chLeft > 0) {
if ((isNotEOF = ufile_getch32(input, &c)) && uset_contains(scanset, c)) {
readCharacter = TRUE;
if (!info->fSkipArg) {
int32_t idx = 0;
UBool isError = FALSE;
U16_APPEND(alias, idx, chLeft, c, isError);
if (isError) {
break;
}
alias += idx;
}
chLeft -= (1 + U_IS_SUPPLEMENTARY(c));
}
else {
/* if the character's not in the scanset, break out */
break;
}
}
/* put the final character we read back on the input */
if(isNotEOF && chLeft > 0) {
u_fungetc(c, input);
}
}
uset_close(scanset);
/* if we didn't match at least 1 character, fail */
if(!readCharacter)
return -1;
/* otherwise, add the terminator */
else if (!info->fSkipArg) {
*alias = 0x00;
}
/* we converted 1 arg */
*argConverted = !info->fSkipArg;
return (info->fWidth >= 0 ? info->fWidth : INT32_MAX) - chLeft;
}
/* Use US-ASCII characters only for formatting. Most codepages have
characters 20-7F from Unicode. Using any other codepage specific
characters will make it very difficult to format the string on
non-Unicode machines */
static const u_scanf_info g_u_scanf_infos[USCANF_NUM_FMT_HANDLERS] = {
/* 0x20 */
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_SIMPLE_PERCENT,UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
/* 0x30 */
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
/* 0x40 */
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_UCHAR,
UFMT_EMPTY, UFMT_SCIENTIFIC, UFMT_EMPTY, UFMT_SCIDBL,
#ifdef U_USE_OBSOLETE_IO_FORMATTING
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_UCHAR/*deprecated*/,
#else
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
#endif
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
/* 0x50 */
UFMT_PERCENT, UFMT_EMPTY, UFMT_EMPTY, UFMT_USTRING,
#ifdef U_USE_OBSOLETE_IO_FORMATTING
UFMT_EMPTY, UFMT_USTRING/*deprecated*/,UFMT_SPELLOUT, UFMT_EMPTY,
#else
UFMT_EMPTY, UFMT_EMPTY, UFMT_SPELLOUT, UFMT_EMPTY,
#endif
UFMT_HEX, UFMT_EMPTY, UFMT_EMPTY, UFMT_SCANSET,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
/* 0x60 */
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_CHAR,
UFMT_INT, UFMT_SCIENTIFIC, UFMT_DOUBLE, UFMT_SCIDBL,
UFMT_EMPTY, UFMT_INT, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_COUNT, UFMT_OCTAL,
/* 0x70 */
UFMT_POINTER, UFMT_EMPTY, UFMT_EMPTY, UFMT_STRING,
UFMT_EMPTY, UFMT_UINT, UFMT_EMPTY, UFMT_EMPTY,
UFMT_HEX, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY, UFMT_EMPTY,
};
U_CFUNC int32_t
u_scanf_parse(UFILE *f,
const UChar *patternSpecification,
va_list ap)
{
const UChar *alias;
int32_t count, converted, argConsumed, cpConsumed;
uint16_t handlerNum;
ufmt_args args;
u_scanf_spec spec;
ufmt_type_info info;
u_scanf_handler handler;
/* alias the pattern */
alias = patternSpecification;
/* haven't converted anything yet */
argConsumed = 0;
converted = 0;
cpConsumed = 0;
/* iterate through the pattern */
for(;;) {
/* match any characters up to the next '%' */
while(*alias != UP_PERCENT && *alias != 0x0000 && u_fgetc(f) == *alias) {
alias++;
}
/* if we aren't at a '%', or if we're at end of string, break*/
if(*alias != UP_PERCENT || *alias == 0x0000)
break;
/* parse the specifier */
count = u_scanf_parse_spec(alias, &spec);
/* update the pointer in pattern */
alias += count;
handlerNum = (uint16_t)(spec.fInfo.fSpec - USCANF_BASE_FMT_HANDLERS);
if (handlerNum < USCANF_NUM_FMT_HANDLERS) {
/* skip the argument, if necessary */
/* query the info function for argument information */
info = g_u_scanf_infos[ handlerNum ].info;
if (info != ufmt_count && u_feof(f)) {
break;
}
else if(spec.fInfo.fSkipArg) {
args.ptrValue = NULL;
}
else {
switch(info) {
case ufmt_count:
/* set the spec's width to the # of items converted */
spec.fInfo.fWidth = cpConsumed;
/* fall through to next case */
case ufmt_char:
case ufmt_uchar:
case ufmt_int:
case ufmt_string:
case ufmt_ustring:
case ufmt_pointer:
case ufmt_float:
case ufmt_double:
args.ptrValue = va_arg(ap, void*);
break;
default:
/* else args is ignored */
args.ptrValue = NULL;
break;
}
}
/* call the handler function */
handler = g_u_scanf_infos[ handlerNum ].handler;
if(handler != 0) {
/* reset count to 1 so that += for alias works. */
count = 1;
cpConsumed += (*handler)(f, &spec.fInfo, &args, alias, &count, &argConsumed);
/* if the handler encountered an error condition, break */
if(argConsumed < 0) {
converted = -1;
break;
}
/* add to the # of items converted */
converted += argConsumed;
/* update the pointer in pattern */
alias += count-1;
}
/* else do nothing */
}
/* else do nothing */
/* just ignore unknown tags */
}
/* return # of items converted */
return converted;
}
#endif /* #if !UCONFIG_NO_FORMATTING */