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Fix some usage of std::istream unformatted input in hwpfilter/source/hwpeq.cxx

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(Though some deficiencies remain, e.g. when values are assumed to be valid
characters and not eof().)

Change-Id: Ia5ec681a68086e9843206a6b44a44f8ec3800b88
This commit is contained in:
Stephan Bergmann 2017-03-23 11:02:10 +01:00
parent 77c2b0a33e
commit 4a3f2cb747
1 changed files with 32 additions and 20 deletions
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52
hwpfilter/source/hwpeq.cxx
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@ -41,14 +41,21 @@ using namespace std;
# define ENDL "\n"
#endif
#define WS " \t\r\n\v\f"
#define EQ_CASE 0x01 // case sensitive cmd
#define EQ_ENV 0x02 // equiv to latex environment
#define EQ_ATOP 0x04 // must revert order
#define IS_WS(ch) (strchr(WS, ch))
#define IS_BINARY(ch) (strchr("+-<=>", ch))
static bool IS_WS(std::istream::int_type ch) {
return ch != std::istream::traits_type::eof()
&& rtl::isAsciiWhiteSpace(
static_cast<unsigned char>(
std::istream::traits_type::to_char_type(ch)));
}
static bool IS_BINARY(std::istream::int_type ch) {
return ch != std::istream::traits_type::eof()
&& strchr("+-<=>", std::istream::traits_type::to_char_type(ch));
}
#ifdef _WIN32
#define STRICMP stricmp
@ -479,7 +486,7 @@ void push_token(MzString &white, MzString &token, istream *strm)
* alphabet string, sigle character */
static int next_token(MzString &white, MzString &token, istream *strm)
{
int ch = 0;
std::istream::int_type ch = 0;
if( stk->state(strm) ) {
white = stk->white;
@ -500,7 +507,9 @@ static int next_token(MzString &white, MzString &token, istream *strm)
while( IS_WS(ch = strm->get()) );
}
if( ch == '\\' || ch & 0x80 || isalpha(ch) ) {
if( ch == '\\' || ch & 0x80
|| (ch != std::istream::traits_type::eof() && rtl::isAsciiAlpha(ch)) )
{
if( ch == '\\' ) {
token << (char) ch;
ch = strm->get();
@ -509,8 +518,8 @@ static int next_token(MzString &white, MzString &token, istream *strm)
token << (char) ch;
ch = strm->get();
} while( ch != std::istream::traits_type::eof()
&& (ch & 0x80 || isalpha(ch)) ) ;
strm->putback(sal::static_int_cast<char>(ch));
&& (ch & 0x80 || rtl::isAsciiAlpha(ch)) ) ;
strm->putback(static_cast<char>(ch));
/* special treatment of sub, sub, over, atop
The reason for this is that affect next_state().
*/
@ -531,12 +540,14 @@ static int next_token(MzString &white, MzString &token, istream *strm)
else if( IS_BINARY(ch) ) {
do token << (char) ch;
while( IS_BINARY(ch = strm->get()) );
strm->putback(sal::static_int_cast<char>(ch));
strm->putback(static_cast<char>(ch));
}
else if( isdigit(ch) ) {
do token << (char) ch;
while( isdigit(ch = strm->get()) );
strm->putback(sal::static_int_cast<char>(ch));
else if( ch != std::istream::traits_type::eof() && rtl::isAsciiDigit(ch) ) {
do {
token << (char) ch;
ch = strm->get();
} while( ch != std::istream::traits_type::eof() && rtl::isAsciiDigit(ch) );
strm->putback(static_cast<char>(ch));
}
else
token << (char) ch;
@ -544,20 +555,20 @@ static int next_token(MzString &white, MzString &token, istream *strm)
return token.length();
}
static int read_white_space(MzString& outs, istream *strm)
static std::istream::int_type read_white_space(MzString& outs, istream *strm)
{
int result;
std::istream::int_type result;
if( stk->state(strm) ) {
outs << stk->white;
stk->white = nullptr;
result = stk->token[0];
result = std::istream::traits_type::to_int_type(stk->token[0]);
}
else {
int ch;
std::istream::int_type ch;
while( IS_WS(ch = strm->get()) )
outs << (char )ch;
strm->putback(sal::static_int_cast<char>(ch));
strm->putback(static_cast<char>(ch));
result = ch;
}
return result;
@ -619,7 +630,7 @@ static int eq_word(MzString& outs, istream *strm, int status)
if( nullptr != (eq = lookup_eqn(keyword)) ) {
int nargs = eq->nargs;
while( nargs-- ) {
const int ch = read_white_space(state, strm);
const std::istream::int_type ch = read_white_space(state, strm);
if( ch != '{' ) state << '{';
eq_word(state, strm, script_status);
if( ch != '{' ) state << '}';
@ -678,7 +689,8 @@ static char eq2ltxconv(MzString& sstr, istream *strm, const char *sentinel)
{
MzString white, token;
char key[256];
int ch, result;
std::istream::int_type ch;
int result;
while( 0 != (result = next_token(white, token, strm)) ) {
if( sentinel && (result == 1) && strchr(sentinel, token[0]) )