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Add StringToNum implementation

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elasota
2019-12-27 14:18:20 -05:00
parent 8ca4d17de7
commit 751a60b580
1 changed files with 51 additions and 51 deletions
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102
PortabilityLayer/PLNumberFormatting.cpp
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@@ -1,52 +1,52 @@
#include "PLNumberFormatting.h"
#include "PLPasStr.h"
#include "PLNumberFormatting.h"
#include "PLPasStr.h"
void StringToNum(const PLPasStr &str, long *num)
{
if (str.Length() == 0)
{
num = 0;
return;
}
const size_t len = str.Length();
const char *chars = str.Chars();
const char *charsEnd = chars + len;
long result = 0;
if (chars[0] == '-')
{
chars++;
while (chars != charsEnd)
{
const char c = *chars++;
if (c < '0' || c > '9')
{
num = 0;
return;
}
result = result * 10 - (c - '0');
}
}
else
{
while (chars != charsEnd)
{
const char c = *chars++;
if (c < '0' || c > '9')
{
num = 0;
return;
}
result = result * 10 + (c - '0');
}
}
*num = result;
}
{
if (str.Length() == 0)
{
num = 0;
return;
}
const size_t len = str.Length();
const char *chars = str.Chars();
const char *charsEnd = chars + len;
long result = 0;
if (chars[0] == '-')
{
chars++;
while (chars != charsEnd)
{
const char c = *chars++;
if (c < '0' || c > '9')
{
num = 0;
return;
}
result = result * 10 - (c - '0');
}
}
else
{
while (chars != charsEnd)
{
const char c = *chars++;
if (c < '0' || c > '9')
{
num = 0;
return;
}
result = result * 10 + (c - '0');
}
}
*num = result;
}