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Move exception-throwing get_* methods into separate implementation mo…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| // Copyright 2014 BitPay Inc. | ||
| // Copyright 2015 Bitcoin Core Developers | ||
| // Distributed under the MIT software license, see the accompanying | ||
| // file COPYING or http://www.opensource.org/licenses/mit-license.php. | ||
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| #include <stdint.h> | ||
| #include <errno.h> | ||
| #include <string.h> | ||
| #include <stdlib.h> | ||
| #include <stdexcept> | ||
| #include <vector> | ||
| #include <limits> | ||
| #include <string> | ||
|
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| #include "univalue.h" | ||
|
|
||
| namespace | ||
| { | ||
| static bool ParsePrechecks(const std::string& str) | ||
| { | ||
| if (str.empty()) // No empty string allowed | ||
| return false; | ||
| if (str.size() >= 1 && (json_isspace(str[0]) || json_isspace(str[str.size()-1]))) // No padding allowed | ||
| return false; | ||
| if (str.size() != strlen(str.c_str())) // No embedded NUL characters allowed | ||
| return false; | ||
| return true; | ||
| } | ||
|
|
||
| bool ParseInt32(const std::string& str, int32_t *out) | ||
| { | ||
| if (!ParsePrechecks(str)) | ||
| return false; | ||
| char *endp = NULL; | ||
| errno = 0; // strtol will not set errno if valid | ||
| long int n = strtol(str.c_str(), &endp, 10); | ||
| if(out) *out = (int32_t)n; | ||
| // Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow | ||
| // we still have to check that the returned value is within the range of an *int32_t*. On 64-bit | ||
| // platforms the size of these types may be different. | ||
| return endp && *endp == 0 && !errno && | ||
| n >= std::numeric_limits<int32_t>::min() && | ||
| n <= std::numeric_limits<int32_t>::max(); | ||
| } | ||
|
|
||
| bool ParseInt64(const std::string& str, int64_t *out) | ||
| { | ||
| if (!ParsePrechecks(str)) | ||
| return false; | ||
| char *endp = NULL; | ||
| errno = 0; // strtoll will not set errno if valid | ||
| long long int n = strtoll(str.c_str(), &endp, 10); | ||
| if(out) *out = (int64_t)n; | ||
| // Note that strtoll returns a *long long int*, so even if strtol doesn't report a over/underflow | ||
| // we still have to check that the returned value is within the range of an *int64_t*. | ||
| return endp && *endp == 0 && !errno && | ||
| n >= std::numeric_limits<int64_t>::min() && | ||
| n <= std::numeric_limits<int64_t>::max(); | ||
| } | ||
|
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||
| bool ParseDouble(const std::string& str, double *out) | ||
| { | ||
| if (!ParsePrechecks(str)) | ||
| return false; | ||
| if (str.size() >= 2 && str[0] == '0' && str[1] == 'x') // No hexadecimal floats allowed | ||
| return false; | ||
| std::istringstream text(str); | ||
| text.imbue(std::locale::classic()); | ||
| double result; | ||
| text >> result; | ||
| if(out) *out = result; | ||
| return text.eof() && !text.fail(); | ||
| } | ||
| } | ||
|
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||
| const std::vector<std::string>& UniValue::getKeys() const | ||
| { | ||
| if (typ != VOBJ) | ||
| throw std::runtime_error("JSON value is not an object as expected"); | ||
| return keys; | ||
| } | ||
|
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| const std::vector<UniValue>& UniValue::getValues() const | ||
| { | ||
| if (typ != VOBJ && typ != VARR) | ||
| throw std::runtime_error("JSON value is not an object or array as expected"); | ||
| return values; | ||
| } | ||
|
|
||
| bool UniValue::get_bool() const | ||
| { | ||
| if (typ != VBOOL) | ||
| throw std::runtime_error("JSON value is not a boolean as expected"); | ||
| return getBool(); | ||
| } | ||
|
|
||
| const std::string& UniValue::get_str() const | ||
| { | ||
| if (typ != VSTR) | ||
| throw std::runtime_error("JSON value is not a string as expected"); | ||
| return getValStr(); | ||
| } | ||
|
|
||
| int UniValue::get_int() const | ||
| { | ||
| if (typ != VNUM) | ||
| throw std::runtime_error("JSON value is not an integer as expected"); | ||
| int32_t retval; | ||
| if (!ParseInt32(getValStr(), &retval)) | ||
| throw std::runtime_error("JSON integer out of range"); | ||
| return retval; | ||
| } | ||
|
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||
| int64_t UniValue::get_int64() const | ||
| { | ||
| if (typ != VNUM) | ||
| throw std::runtime_error("JSON value is not an integer as expected"); | ||
| int64_t retval; | ||
| if (!ParseInt64(getValStr(), &retval)) | ||
| throw std::runtime_error("JSON integer out of range"); | ||
| return retval; | ||
| } | ||
|
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||
| double UniValue::get_real() const | ||
| { | ||
| if (typ != VNUM) | ||
| throw std::runtime_error("JSON value is not a number as expected"); | ||
| double retval; | ||
| if (!ParseDouble(getValStr(), &retval)) | ||
| throw std::runtime_error("JSON double out of range"); | ||
| return retval; | ||
| } | ||
|
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||
| const UniValue& UniValue::get_obj() const | ||
| { | ||
| if (typ != VOBJ) | ||
| throw std::runtime_error("JSON value is not an object as expected"); | ||
| return *this; | ||
| } | ||
|
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| const UniValue& UniValue::get_array() const | ||
| { | ||
| if (typ != VARR) | ||
| throw std::runtime_error("JSON value is not an array as expected"); | ||
| return *this; | ||
| } | ||
|
|