parser-util.cc
// -*- mode: c++; c-basic-offset:4 -*-
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
// (c) COPYRIGHT URI/MIT 1995-1999
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
// Authors:
// jhrg,jimg James Gallagher <jgallagher@gso.uri.edu>
// These functions are utility functions used by the various DAP parsers (the
// DAS, DDS and constraint expression parsers).
// jhrg 9/7/95
#include "config.h"
#include <cerrno>
#include <cassert>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <iostream>
#include <sstream>
// We wrap VC++ 6.x strtod() to account for a short comming
// in that function in regards to "NaN".
#ifdef WIN32
#include <limits>
double w32strtod(const char *, char **);
#endif
#include "Error.h"
#include "debug.h"
#include "parser.h" // defines constants such as ID_MAX
#include "dods-limits.h"
#include "util.h" // Jose Garcia: for append_long_to_string.
using std::cerr;
using std::endl;
#ifdef WIN32
// VC++ 6.x strtod() doesn't recognize "NaN". Account for it
// by wrapping it around a check for the Nan string. Use of
// the product is obsolete as of 1/2007, but it is unknown if
// the issue is still there in later releases of that product.
// ROM - 01/2007
double w32strtod(const char *val, char **ptr)
{
// Convert the two char arrays to compare to strings.
string *sval = new string(val);
string *snan = new string("NaN");
// If val doesn't contain "NaN|Nan|nan|etc", use strtod as
// provided.
if (stricmp(sval->c_str(), snan->c_str()) != 0)
return (strtod(val, ptr));
// But if it does, return the bit pattern for Nan and point
// the parsing ptr arg at the trailing '\0'.
*ptr = (char *) val + strlen(val);
return (std::numeric_limits < double >::quiet_NaN());
}
#endif
namespace libdap {
// Deprecated, but still used by the HDF4 EOS server code.
void
parse_error(parser_arg * arg, const char *msg, const int line_num,
const char *context)
{
// Jose Garcia
// This assert(s) is (are) only for developing purposes
// For production servers remove it by compiling with NDEBUG
assert(arg);
assert(msg);
arg->set_status(FALSE);
string oss = "";
if (line_num != 0) {
oss += "Error parsing the text on line ";
append_long_to_string(line_num, 10, oss);
}
else {
oss += "Parse error.";
}
if (context)
oss += (string) " at or near: " + context + (string) "\n" + msg
+ (string) "\n";
else
oss += (string) "\n" + msg + (string) "\n";
arg->set_error(new Error(unknown_error, oss));
}
void
parse_error(const char *msg, const int line_num, const char *context)
{
// Jose Garcia
// This assert(s) is (are) only for developing purposes
// For production servers remove it by compiling with NDEBUG
assert(msg);
string oss = "";
if (line_num != 0) {
oss += "Error parsing the text on line ";
append_long_to_string(line_num, 10, oss);
}
else {
oss += "Parse error.";
}
if (context)
oss += (string) " at or near: " + context + (string) "\n" + msg
+ (string) "\n";
else
oss += (string) "\n" + msg + (string) "\n";
throw Error(malformed_expr, oss);
}
// context comes from the parser and will always be a char * unless the
// parsers change dramatically.
void
parse_error(const string & msg, const int line_num, const char *context)
{
parse_error(msg.c_str(), line_num, context);
}
void save_str(char *dst, const char *src, const int line_num)
{
if (strlen(src) >= ID_MAX)
parse_error(string("The word `") + string(src)
+ string("' is too long (it should be no longer than ")
+ long_to_string(ID_MAX) + string(")."), line_num);
strncpy(dst, src, ID_MAX);
dst[ID_MAX - 1] = '\0'; /* in case ... */
}
void save_str(string & dst, const char *src, const int)
{
dst = src;
}
bool is_keyword(string id, const string & keyword)
{
downcase(id);
id = prune_spaces(id);
DBG(cerr << "is_keyword: " << keyword << " = " << id << endl);
return id == keyword;
}
int check_byte(const char *val)
{
char *ptr;
long v = strtol(val, &ptr, 0);
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
DBG(cerr << "v: " << v << endl);
// We're very liberal here with values. Anything that can fit into 8 bits
// is allowed through. Clients will have to deal with the fact that the
// ASCII representation for the value might need to be tweaked. This is
// especially the case for Java clients where Byte datatypes are
// signed. 3/20/2000 jhrg
if ((v < 0 && v < DODS_SCHAR_MIN)
|| (v > 0 && static_cast < unsigned long >(v) > DODS_UCHAR_MAX))
return FALSE;
return TRUE;
}
// This version of check_int will pass base 8, 10 and 16 numbers when they
// use the ANSI standard for string representation of those number bases.
int check_int16(const char *val)
{
char *ptr;
long v = strtol(val, &ptr, 0); // `0' --> use val to determine base
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
// Don't use the constant from limits.h, use the ones in dods-limits.h
if (v > DODS_SHRT_MAX || v < DODS_SHRT_MIN) {
return FALSE;
}
return TRUE;
}
int check_uint16(const char *val)
{
char *ptr;
unsigned long v = strtol(val, &ptr, 0);
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
if (v > DODS_USHRT_MAX) {
return FALSE;
}
return TRUE;
}
int check_int32(const char *val)
{
char *ptr;
errno = 0;
long v = strtol(val, &ptr, 0); // `0' --> use val to determine base
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
// We need to check errno since strtol return clamps on overflow so the
// check against the DODS values below will always pass, even for out of
// bounds values in the string. mjohnson 7/20/09
if (errno == ERANGE) {
return FALSE;
}
// This could be combined with the above, or course, but I'm making it
// separate to highlight the test. On 64-bit linux boxes 'long' may be
// 64-bits and so 'v' can hold more than a DODS_INT32. jhrg 3/23/10
else if (v > DODS_INT_MAX || v < DODS_INT_MIN) {
return FALSE;
}
else {
return TRUE;
}
}
int check_uint32(const char *val)
{
// Eat whitespace and check for an initial '-' sign...
// strtoul allows an initial minus. mjohnson
const char* c = val;
while (c && isspace(*c)) {
c++;
}
if (c && (*c == '-')) {
return FALSE;
}
char *ptr;
errno = 0;
unsigned long v = strtoul(val, &ptr, 0);
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
// check overflow first, or the below check is invalid due to
// clamping to the maximum value by strtoul
// maybe consider using long long for these checks? mjohnson
if (errno == ERANGE) {
return FALSE;
}
// See above.
else if (v > DODS_UINT_MAX) {
return FALSE;
}
else {
return TRUE;
}
}
int check_int32(const char *val, int &v)
{
char *ptr;
errno = 0;
long tmp = strtol(val, &ptr, 0); // `0' --> use val to determine base
if ((tmp == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
// We need to check errno since strtol return clamps on overflow so the
// check against the DODS values below will always pass, even for out of
// bounds values in the string. mjohnson 7/20/09
if (errno == ERANGE) {
return FALSE;
}
// This could be combined with the above, or course, but I'm making it
// separate to highlight the test. On 64-bit linux boxes 'long' may be
// 64-bits and so 'v' can hold more than a DODS_INT32. jhrg 3/23/10
else if (tmp > DODS_INT_MAX || tmp < DODS_INT_MIN) {
return FALSE;
}
else {
v = (int)tmp;
return TRUE;
}
}
int check_uint32(const char *val, unsigned int &v)
{
// Eat whitespace and check for an initial '-' sign...
// strtoul allows an initial minus. mjohnson
const char* c = val;
while (c && isspace(*c)) {
c++;
}
if (c && (*c == '-')) {
return FALSE;
}
char *ptr;
errno = 0;
unsigned long tmp = strtoul(val, &ptr, 0);
if ((tmp == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
// check overflow first, or the below check is invalid due to
// clamping to the maximum value by strtoul
// maybe consider using long long for these checks? mjohnson
if (errno == ERANGE) {
return FALSE;
}
// See above.
else if (tmp > DODS_UINT_MAX) {
return FALSE;
}
else {
v = (unsigned int)tmp;
return TRUE;
}
}
int check_int64(const char *val)
{
char *ptr;
errno = 0;
long long v = strtoll(val, &ptr, 0); // `0' --> use val to determine base
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
// We need to check errno since strtol return clamps on overflow so the
// check against the DODS values below will always pass, even for out of
// bounds values in the string. mjohnson 7/20/09
if (errno == ERANGE) {
return FALSE;
}
#if 0
// This could be combined with the above, or course, but I'm making it
// separate to highlight the test. On 64-bit linux boxes 'long' may be
// 64-bits and so 'v' can hold more than a DODS_INT32. jhrg 3/23/10
//
// Removed - Coverity says it can never be false. Makes sense. jhrg 5/10/16
else if (v <= DODS_LLONG_MAX && v >= DODS_LLONG_MIN) {
return FALSE;
}
#endif
else {
return TRUE;
}
}
int check_uint64(const char *val)
{
// Eat whitespace and check for an initial '-' sign...
// strtoul allows an initial minus. mjohnson
const char* c = val;
while (c && isspace(*c)) {
c++;
}
if (c && (*c == '-')) {
return FALSE;
}
char *ptr;
errno = 0;
unsigned long long v = strtoull(val, &ptr, 0);
if ((v == 0 && val == ptr) || *ptr != '\0') {
return FALSE;
}
if (errno == ERANGE) {
return FALSE;
}
else if (v > DODS_ULLONG_MAX) { // 2^61
return FALSE;
}
else {
return v;
}
}
// Check first for system errors (like numbers so small they convert
// (erroneously) to zero. Then make sure that the value is within
// limits.
int check_float32(const char *val)
{
char *ptr;
errno = 0; // Clear previous value. Fix for the 64bit
// IRIX from Rob Morris. 5/21/2001 jhrg
#ifdef WIN32
double v = w32strtod(val, &ptr);
#else
double v = strtod(val, &ptr);
#endif
DBG(cerr << "v: " << v << ", ptr: " << ptr
<< ", errno: " << errno << ", val==ptr: " << (val == ptr) << endl);
if (errno == ERANGE || (v == 0.0 && val == ptr) || *ptr != '\0')
return FALSE;
#if 0
if ((v == 0.0 && (val == ptr || errno == HUGE_VAL || errno == ERANGE))
|| *ptr != '\0') {
return FALSE;
}
#endif
DBG(cerr << "fabs(" << val << ") = " << fabs(v) << endl);
double abs_val = fabs(v);
if (abs_val > DODS_FLT_MAX
|| (abs_val != 0.0 && abs_val < DODS_FLT_MIN))
return FALSE;
return TRUE;
}
int check_float64(const char *val)
{
DBG(cerr << "val: " << val << endl);
char *ptr;
errno = 0; // Clear previous value. 5/21/2001 jhrg
#ifdef WIN32
double v = w32strtod(val, &ptr);
#else
double v = strtod(val, &ptr);
#endif
DBG(cerr << "v: " << v << ", ptr: " << ptr
<< ", errno: " << errno << ", val==ptr: " << (val == ptr) << endl);
if (errno == ERANGE || (v == 0.0 && val == ptr) || *ptr != '\0')
return FALSE;
#if 0
if ((v == 0.0 && (val == ptr || errno == HUGE_VAL || errno == ERANGE))
|| *ptr != '\0') {
return FALSE;
}
#endif
DBG(cerr << "fabs(" << val << ") = " << fabs(v) << endl);
double abs_val = fabs(v);
if (abs_val > DODS_DBL_MAX
|| (abs_val != 0.0 && abs_val < DODS_DBL_MIN))
return FALSE;
return TRUE;
}
int check_float64(const char *val, double &v)
{
DBG(cerr << "val: " << val << endl);
char *ptr;
errno = 0; // Clear previous value. 5/21/2001 jhrg
#ifdef WIN32
v = w32strtod(val, &ptr);
#else
v = strtod(val, &ptr);
#endif
DBG(cerr << "v: " << v << ", ptr: " << ptr
<< ", errno: " << errno << ", val==ptr: " << (val == ptr) << endl);
if (errno == ERANGE || (v == 0.0 && val == ptr) || *ptr != '\0')
return FALSE;
#if 0
if ((v == 0.0 && (val == ptr || errno == HUGE_VAL || errno == ERANGE))
|| *ptr != '\0') {
return FALSE;
}
#endif
DBG(cerr << "fabs(" << val << ") = " << fabs(v) << endl);
double abs_val = fabs(v);
if (abs_val > DODS_DBL_MAX
|| (abs_val != 0.0 && abs_val < DODS_DBL_MIN))
return FALSE;
return TRUE;
}
long long get_int64(const char *val)
{
char *ptr;
errno = 0;
long long v = strtoll(val, &ptr, 0); // `0' --> use val to determine base
if ((v == 0 && val == ptr) || *ptr != '\0') {
throw Error("Expected a 64-bit integer, but found other characters.");
// The value '" + string(val) + "' contains extra characters.");
}
// We need to check errno since strtol return clamps on overflow so the
// check against the DODS values below will always pass, even for out of
// bounds values in the string. mjohnson 7/20/09
if (errno == ERANGE) {
throw Error("The 64-bit integer value is out of range.");
}
#if 0
// This could be combined with the above, or course, but I'm making it
// separate to highlight the test. On 64-bit linux boxes 'long' may be
// 64-bits and so 'v' can hold more than a DODS_INT32. jhrg 3/23/10
//
// Removed because coverity flags it as useless, which it is until we
// have 128-bit ints... jhrg 5/9/16
else if (v > DODS_LLONG_MAX || v < DODS_LLONG_MIN) {
throw Error("The value '" + string(val) + "' is out of range.");
}
#endif
else {
return v;
}
}
unsigned long long get_uint64(const char *val)
{
// Eat whitespace and check for an initial '-' sign...
// strtoul allows an initial minus. mjohnson
const char* c = val;
while (c && isspace(*c)) {
c++;
}
if (c && (*c == '-')) {
throw Error("Expected a valid array index.");
}
char *ptr;
errno = 0;
unsigned long long v = strtoull(val, &ptr, 0);
if ((v == 0 && val == ptr) || *ptr != '\0') {
throw Error("Expected an unsigned 64-bit integer, but found other characters.");
}
if (errno == ERANGE) {
throw Error("The 64-bit integer value is out of range.");
}
#if 0
// Coverity; see above. jhrg 5/9/16
else if (v > DODS_MAX_ARRAY_INDEX) { // 2^61
throw Error("The value '" + string(val) + "' is out of range.");
}
#endif
else {
return v;
}
}
int get_int32(const char *val)
{
char *ptr;
errno = 0;
int v = strtol(val, &ptr, 0); // `0' --> use val to determine base
if ((v == 0 && val == ptr) || *ptr != '\0') {
throw Error("Expected a 32-bit integer, but found other characters.");
}
// We need to check errno since strtol return clamps on overflow so the
// check against the DODS values below will always pass, even for out of
// bounds values in the string. mjohnson 7/20/09
if (errno == ERANGE) {
throw Error("The 32-bit integer value is out of range.");
}
// This could be combined with the above, or course, but I'm making it
// separate to highlight the test. On 64-bit linux boxes 'long' may be
// 64-bits and so 'v' can hold more than a DODS_INT32. jhrg 3/23/10
else if (v > DODS_INT_MAX || v < DODS_INT_MIN) {
return FALSE;
}
else {
return v;
}
}
unsigned int get_uint32(const char *val)
{
// Eat whitespace and check for an initial '-' sign...
// strtoul allows an initial minus. mjohnson
const char* c = val;
while (c && isspace(*c)) {
c++;
}
if (c && (*c == '-')) {
throw Error("Expected an unsigned 32-bit integer, but found other characters.");
}
char *ptr;
errno = 0;
unsigned int v = strtoul(val, &ptr, 0);
if ((v == 0 && val == ptr) || *ptr != '\0') {
throw Error("Expected an unsigned 32-bit integer, but found other characters.");
}
if (errno == ERANGE) {
throw Error("The 32-bit integer value is out of range.");
}
// See above.
else if (v > DODS_UINT_MAX) {
return FALSE;
}
else {
return v;
}
}
double get_float64(const char *val)
{
DBG(cerr << "val: " << val << endl);
char *ptr;
errno = 0; // Clear previous value. 5/21/2001 jhrg
#ifdef WIN32
double v = w32strtod(val, &ptr);
#else
double v = strtod(val, &ptr);
#endif
if (errno == ERANGE || (v == 0.0 && val == ptr) || *ptr != '\0')
throw Error("The 64-bit floating point value is out of range.");;
DBG(cerr << "fabs(" << val << ") = " << fabs(v) << endl);
double abs_val = fabs(v);
if (abs_val > DODS_DBL_MAX || (abs_val != 0.0 && abs_val < DODS_DBL_MIN))
throw Error("The 64-bit floating point value is out of range.");;
return v;
}
/*
Maybe someday we will really check the Urls to see if they are valid...
*/
int check_url(const char *)
{
return TRUE;
}
} // namespace libdap
libdap::check_url
int check_url(const char *)
Is the value a valid URL?
Definition: parser-util.cc:696
libdap::check_byte
int check_byte(const char *val)
Is the value a valid byte?
Definition: parser-util.cc:190
libdap
top level DAP object to house generic methods
Definition: AlarmHandler.h:36
libdap::prune_spaces
string prune_spaces(const string &name)
Definition: util.cc:459
libdap::downcase
void downcase(string &s)
Definition: util.cc:563
libdap::save_str
void save_str(char *dst, const char *src, const int line_num)
Save a string to a temporary variable during the parse.
Definition: parser-util.cc:156