blob: 720aacf29b575a6565ed257cdd013afcdb0baff7 [file] [log] [blame] [edit]
// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include "upb/lex/atoi.h"
// Must be last.
#include "upb/port/def.inc"
const char* upb_BufToUint64(const char* ptr, const char* end, uint64_t* val) {
uint64_t u64 = 0;
while (ptr < end) {
unsigned ch = *ptr - '0';
if (ch >= 10) break;
if (u64 > UINT64_MAX / 10 || u64 * 10 > UINT64_MAX - ch) {
return NULL; // integer overflow
}
u64 *= 10;
u64 += ch;
ptr++;
}
*val = u64;
return ptr;
}
const char* upb_BufToInt64(const char* ptr, const char* end, int64_t* val,
bool* is_neg) {
bool neg = false;
uint64_t u64;
if (ptr != end && *ptr == '-') {
ptr++;
neg = true;
}
ptr = upb_BufToUint64(ptr, end, &u64);
if (!ptr || u64 > (uint64_t)INT64_MAX + neg) {
return NULL; // integer overflow
}
*val = neg ? -u64 : u64;
if (is_neg) *is_neg = neg;
return ptr;
}