'21.07'21.07

1 files changed, 144 insertions, 0 deletions

diff --git a/CPP/Common/StringToInt.cpp b/CPP/Common/StringToInt.cpp
new file mode 100644
index 0000000..839867a
--- /dev/null
+++ b/CPP/Common/StringToInt.cpp
@@ -0,0 +1,144 @@
+// Common/StringToInt.cpp
+
+#include "StdAfx.h"
+
+#include "StringToInt.h"
+
+static const UInt32 k_UInt32_max = 0xFFFFFFFF;
+static const UInt64 k_UInt64_max = UINT64_CONST(0xFFFFFFFFFFFFFFFF);
+// static const UInt64 k_UInt64_max = (UInt64)(Int64)-1;
+
+#define CONVERT_STRING_TO_UINT_FUNC(uintType, charType, charTypeUnsigned) \
+  uintType ConvertStringTo ## uintType(const charType *s, const charType **end) throw() { \
+    if (end) *end = s; \
+    uintType res = 0; \
+    for (;; s++) { \
+      charTypeUnsigned c = (charTypeUnsigned)*s; \
+      if (c < '0' || c > '9') { if (end) *end = s; return res; } \
+      if (res > (k_ ## uintType ## _max) / 10) return 0; \
+      res *= 10; \
+      unsigned v = (unsigned)(c - '0'); \
+      if (res > (k_ ## uintType ## _max) - v) return 0; \
+      res += v; }}
+
+CONVERT_STRING_TO_UINT_FUNC(UInt32, char, Byte)
+CONVERT_STRING_TO_UINT_FUNC(UInt32, wchar_t, wchar_t)
+CONVERT_STRING_TO_UINT_FUNC(UInt64, char, Byte)
+CONVERT_STRING_TO_UINT_FUNC(UInt64, wchar_t, wchar_t)
+
+Int32 ConvertStringToInt32(const wchar_t *s, const wchar_t **end) throw()
+{
+  if (end)
+    *end = s;
+  const wchar_t *s2 = s;
+  if (*s == '-')
+    s2++;
+  if (*s2 == 0)
+    return 0;
+  const wchar_t *end2;
+  UInt32 res = ConvertStringToUInt32(s2, &end2);
+  if (*s == '-')
+  {
+    if (res > ((UInt32)1 << (32 - 1)))
+      return 0;
+  }
+  else if ((res & ((UInt32)1 << (32 - 1))) != 0)
+    return 0;
+  if (end)
+    *end = end2;
+  if (*s == '-')
+    return -(Int32)res;
+  return (Int32)res;
+}
+
+UInt32 ConvertOctStringToUInt32(const char *s, const char **end) throw()
+{
+  if (end)
+    *end = s;
+  UInt32 res = 0;
+  for (;; s++)
+  {
+    unsigned c = (unsigned char)*s;
+    if (c < '0' || c > '7')
+    {
+      if (end)
+        *end = s;
+      return res;
+    }
+    if ((res & (UInt32)7 << (32 - 3)) != 0)
+      return 0;
+    res <<= 3;
+    res |= (unsigned)(c - '0');
+  }
+}
+
+UInt64 ConvertOctStringToUInt64(const char *s, const char **end) throw()
+{
+  if (end)
+    *end = s;
+  UInt64 res = 0;
+  for (;; s++)
+  {
+    unsigned c = (unsigned char)*s;
+    if (c < '0' || c > '7')
+    {
+      if (end)
+        *end = s;
+      return res;
+    }
+    if ((res & (UInt64)7 << (64 - 3)) != 0)
+      return 0;
+    res <<= 3;
+    res |= (unsigned)(c - '0');
+  }
+}
+
+UInt32 ConvertHexStringToUInt32(const char *s, const char **end) throw()
+{
+  if (end)
+    *end = s;
+  UInt32 res = 0;
+  for (;; s++)
+  {
+    unsigned c = (Byte)*s;
+    unsigned v;
+    if (c >= '0' && c <= '9') v = (c - '0');
+    else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A');
+    else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a');
+    else
+    {
+      if (end)
+        *end = s;
+      return res;
+    }
+    if ((res & (UInt32)0xF << (32 - 4)) != 0)
+      return 0;
+    res <<= 4;
+    res |= v;
+  }
+}
+
+UInt64 ConvertHexStringToUInt64(const char *s, const char **end) throw()
+{
+  if (end)
+    *end = s;
+  UInt64 res = 0;
+  for (;; s++)
+  {
+    unsigned c = (Byte)*s;
+    unsigned v;
+    if (c >= '0' && c <= '9') v = (c - '0');
+    else if (c >= 'A' && c <= 'F') v = 10 + (c - 'A');
+    else if (c >= 'a' && c <= 'f') v = 10 + (c - 'a');
+    else
+    {
+      if (end)
+        *end = s;
+      return res;
+    }
+    if ((res & (UInt64)0xF << (64 - 4)) != 0)
+      return 0;
+    res <<= 4;
+    res |= v;
+  }
+}