bool FX_atonum(const CFX_ByteStringC& strc, void* pData) {
if (strc.Find('.') != -1) {
FX_FLOAT* pFloat = static_cast<FX_FLOAT*>(pData);
*pFloat = FX_atof(strc);
return false;
}
// Note, numbers in PDF are typically of the form 123, -123, etc. But,
// for things like the Permissions on the encryption hash the number is
// actually an unsigned value. We use a uint32_t so we can deal with the
// unsigned and then check for overflow if the user actually signed the value.
// The Permissions flag is listed in Table 3.20 PDF 1.7 spec.
pdfium::base::CheckedNumeric<uint32_t> integer = 0;
bool bNegative = false;
bool bSigned = false;
int cc = 0;
if (strc[0] == '+') {
cc++;
bSigned = true;
} else if (strc[0] == '-') {
bNegative = true;
bSigned = true;
cc++;
}
while (cc < strc.GetLength() && std::isdigit(strc[cc])) {
integer = integer * 10 + FXSYS_toDecimalDigit(strc.CharAt(cc));
if (!integer.IsValid())
break;
cc++;
}
// We have a sign, and the value was greater then a regular integer
// we've overflowed, reset to the default value.
if (bSigned) {
if (bNegative) {
if (integer.ValueOrDefault(kDefaultIntValue) >
static_cast<uint32_t>(std::numeric_limits<int>::max()) + 1) {
integer = kDefaultIntValue;
}
} else if (integer.ValueOrDefault(kDefaultIntValue) >
static_cast<uint32_t>(std::numeric_limits<int>::max())) {
integer = kDefaultIntValue;
}
}
// Switch back to the int space so we can flip to a negative if we need.
int value = static_cast<int>(integer.ValueOrDefault(kDefaultIntValue));
if (bNegative)
value = -value;
int* pInt = static_cast<int*>(pData);
*pInt = value;
return true;
}
FX_FLOAT FX_atof(const CFX_ByteStringC& strc) {
if (strc.IsEmpty())
return 0.0;
int cc = 0;
bool bNegative = false;
int len = strc.GetLength();
if (strc[0] == '+') {
cc++;
} else if (strc[0] == '-') {
bNegative = TRUE;
cc++;
}
while (cc < len) {
if (strc[cc] != '+' && strc[cc] != '-') {
break;
}
cc++;
}
FX_FLOAT value = 0;
while (cc < len) {
if (strc[cc] == '.') {
break;
}
value = value * 10 + FXSYS_toDecimalDigit(strc.CharAt(cc));
cc++;
}
int scale = 0;
if (cc < len && strc[cc] == '.') {
cc++;
while (cc < len) {
value +=
FXSYS_FractionalScale(scale, FXSYS_toDecimalDigit(strc.CharAt(cc)));
scale++;
if (scale == FXSYS_FractionalScaleCount())
break;
cc++;
}
}
return bNegative ? -value : value;
}
int64_t FX_atoi64(const char* nptr) {
int c; /* current char */
int64_t total; /* current total */
int sign; /* if '-', then negative, otherwise positive */
/* skip whitespace */
while (isspace((int)(unsigned char)*nptr))
++nptr;
c = (int)(unsigned char)*nptr++;
sign = c; /* save sign indication */
if (c == '-' || c == '+')
c = (int)(unsigned char)*nptr++; /* skip sign */
total = 0;
while (isdigit(c)) {
total = 10 * total + FXSYS_toDecimalDigit(c); /* accumulate digit */
c = (int)(unsigned char)*nptr++; /* get next char */
}
return sign == '-' ? -total : total;
}
CPDFSDK_DateTime& CPDFSDK_DateTime::FromPDFDateTimeString(
const CFX_ByteString& dtStr) {
int strLength = dtStr.GetLength();
if (strLength > 0) {
int i = 0;
int j, k;
FX_CHAR ch;
while (i < strLength && !std::isdigit(dtStr[i]))
++i;
if (i >= strLength)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 4) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.year = (int16_t)k;
if (i >= strLength || j < 4)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.month = (uint8_t)k;
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.day = (uint8_t)k;
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.hour = (uint8_t)k;
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.minute = (uint8_t)k;
if (i >= strLength || j < 2)
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.second = (uint8_t)k;
if (i >= strLength || j < 2)
return *this;
ch = dtStr[i++];
if (ch != '-' && ch != '+')
return *this;
if (ch == '-')
dt.tzHour = -1;
else
dt.tzHour = 1;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.tzHour *= (FX_CHAR)k;
if (i >= strLength || j < 2)
return *this;
ch = dtStr[i++];
if (ch != '\'')
return *this;
j = 0;
k = 0;
while (i < strLength && j < 2) {
ch = dtStr[i];
k = k * 10 + FXSYS_toDecimalDigit(ch);
j++;
if (!std::isdigit(ch))
break;
i++;
}
dt.tzMinute = (uint8_t)k;
if (i >= strLength || j < 2)
return *this;
}
return *this;
}
extern "C" double FXstrtod(const char* nptr, char** endptr) {
double ret = 0.0;
const char* ptr = nptr;
const char* exp_ptr = NULL;
int e_number = 0, e_signal = 0, e_point = 0, is_negative = 0;
int exp_ret = 0, exp_sig = 1, fra_ret = 0, fra_count = 0, fra_base = 1;
if (nptr == NULL) {
return 0.0;
}
for (;; ptr++) {
if (!e_number && !e_point && (*ptr == '\t' || *ptr == ' '))
continue;
if (std::isdigit(*ptr)) {
if (!e_number)
e_number = 1;
if (!e_point) {
ret *= 10;
ret += FXSYS_toDecimalDigit(*ptr);
} else {
fra_count++;
fra_ret *= 10;
fra_ret += FXSYS_toDecimalDigit(*ptr);
}
continue;
}
if (!e_point && *ptr == '.') {
e_point = 1;
continue;
}
if (!e_number && !e_point && !e_signal) {
switch (*ptr) {
case '-':
is_negative = 1;
case '+':
e_signal = 1;
continue;
}
}
if (e_number && (*ptr == 'e' || *ptr == 'E')) {
exp_ptr = ptr++;
if (*ptr == '+' || *ptr == '-') {
exp_sig = (*ptr++ == '+') ? 1 : -1;
if (!std::isdigit(*ptr)) {
if (endptr) {
*endptr = (char*)exp_ptr;
}
break;
}
EXPONENT_DETECT(ptr);
} else if (std::isdigit(*ptr)) {
EXPONENT_DETECT(ptr);
} else {
if (endptr) {
*endptr = (char*)exp_ptr;
}
break;
}
break;
}
if (ptr != nptr && !e_number) {
if (endptr) {
*endptr = (char*)nptr;
}
break;
}
if (endptr) {
*endptr = (char*)ptr;
}
break;
}
while (fra_count--) {
fra_base *= 10;
}
ret += (double)fra_ret / (double)fra_base;
if (exp_sig == 1) {
while (exp_ret--) {
ret *= 10.0;
}
} else {
while (exp_ret--) {
ret /= 10.0;
}
}
return is_negative ? -ret : ret;
}
uint32_t CXML_Parser::GetCharRef() {
m_nOffset = m_nBufferOffset + (FX_FILESIZE)m_dwIndex;
if (IsEOF()) {
return 0;
}
uint8_t ch;
int32_t iState = 0;
CFX_ByteTextBuf buf;
uint32_t code = 0;
do {
while (m_dwIndex < m_dwBufferSize) {
ch = m_pBuffer[m_dwIndex];
switch (iState) {
case 0:
if (ch == '#') {
m_dwIndex++;
iState = 2;
break;
}
iState = 1;
case 1:
m_dwIndex++;
if (ch == ';') {
CFX_ByteStringC ref = buf.AsStringC();
if (ref == "gt") {
code = '>';
} else if (ref == "lt") {
code = '<';
} else if (ref == "amp") {
code = '&';
} else if (ref == "apos") {
code = '\'';
} else if (ref == "quot") {
code = '"';
}
iState = 10;
break;
}
buf.AppendByte(ch);
break;
case 2:
if (ch == 'x') {
m_dwIndex++;
iState = 4;
break;
}
iState = 3;
case 3:
m_dwIndex++;
if (ch == ';') {
iState = 10;
break;
}
if (g_FXCRT_XML_IsDigital(ch))
code = code * 10 + FXSYS_toDecimalDigit(static_cast<FX_WCHAR>(ch));
break;
case 4:
m_dwIndex++;
if (ch == ';') {
iState = 10;
break;
}
uint8_t nHex =
g_FXCRT_XML_ByteTypes[ch] & FXCRTM_XML_CHARTYPE_HexChar;
if (nHex) {
if (nHex == FXCRTM_XML_CHARTYPE_HexDigital) {
code =
(code << 4) + FXSYS_toDecimalDigit(static_cast<FX_WCHAR>(ch));
} else if (nHex == FXCRTM_XML_CHARTYPE_HexLowerLetter) {
code = (code << 4) + ch - 87;
} else {
code = (code << 4) + ch - 55;
}
}
break;
}
if (iState == 10) {
break;
}
}
m_nOffset = m_nBufferOffset + (FX_FILESIZE)m_dwIndex;
if (iState == 10 || m_dwIndex < m_dwBufferSize || IsEOF()) {
break;
}
} while (ReadNextBlock());
return code;
}
CFX_ByteString CPDF_StreamParser::ReadString() {
if (!PositionIsInBounds())
return CFX_ByteString();
int ch = m_pBuf[m_Pos++];
CFX_ByteTextBuf buf;
int parlevel = 0;
int status = 0, iEscCode = 0;
while (1) {
switch (status) {
case 0:
if (ch == ')') {
if (parlevel == 0) {
if (buf.GetLength() > MAX_STRING_LENGTH) {
return CFX_ByteString(buf.GetBuffer(), MAX_STRING_LENGTH);
}
return buf.GetByteString();
}
parlevel--;
buf.AppendChar(')');
} else if (ch == '(') {
parlevel++;
buf.AppendChar('(');
} else if (ch == '\\') {
status = 1;
} else {
buf.AppendChar((char)ch);
}
break;
case 1:
if (ch >= '0' && ch <= '7') {
iEscCode = FXSYS_toDecimalDigit(ch);
status = 2;
break;
}
if (ch == 'n') {
buf.AppendChar('\n');
} else if (ch == 'r') {
buf.AppendChar('\r');
} else if (ch == 't') {
buf.AppendChar('\t');
} else if (ch == 'b') {
buf.AppendChar('\b');
} else if (ch == 'f') {
buf.AppendChar('\f');
} else if (ch == '\r') {
status = 4;
break;
} else if (ch == '\n') {
} else {
buf.AppendChar(ch);
}
status = 0;
break;
case 2:
if (ch >= '0' && ch <= '7') {
iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch);
status = 3;
} else {
buf.AppendChar(iEscCode);
status = 0;
continue;
}
break;
case 3:
if (ch >= '0' && ch <= '7') {
iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch);
buf.AppendChar(iEscCode);
status = 0;
} else {
buf.AppendChar(iEscCode);
status = 0;
continue;
}
break;
case 4:
status = 0;
if (ch != '\n') {
continue;
}
break;
}
if (!PositionIsInBounds())
break;
ch = m_pBuf[m_Pos++];
}
if (PositionIsInBounds())
ch = m_pBuf[m_Pos++];
if (buf.GetLength() > MAX_STRING_LENGTH) {
return CFX_ByteString(buf.GetBuffer(), MAX_STRING_LENGTH);
}
return buf.GetByteString();
}