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Sprintf returns bytes copied. Add IS_DEBUG flag

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Doyle T 2018-06-11 18:40:54 +10:00
parent d740efdf06
commit 0bf1b6d3ff
1 changed files with 40 additions and 28 deletions
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68
dqn.h
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@ -175,6 +175,7 @@ namespace Dqn
{
enum struct ZeroClear { True = 1, False = 0};
enum struct IgnoreCase { True = 1, False = 0};
FILE_SCOPE const bool IS_DEBUG = true;
}; // namespace Dqn
// #Win32 Prototypes
@ -2049,72 +2050,83 @@ struct DqnFixedString
// Xprintf functions always modifies buffer and null-terminates even with insufficient buffer size.
// Asserts on failure if DQN_ASSERT is defined.
// return: True if there was sufficient space.
bool Sprintf (char const *fmt, ...);
bool SprintfAppend (char const *fmt, ...);
// return: The number of characters copied to the buffer
int Sprintf (char const *fmt, ...);
int SprintfAppend (char const *fmt, ...);
bool VSprintf (char const *fmt, va_list argList);
bool VSprintfAppend(char const *fmt, va_list argList);
int VSprintf (char const *fmt, va_list argList);
int VSprintfAppend(char const *fmt, va_list argList);
void Clear (Dqn::ZeroClear clear = Dqn::ZeroClear::False) { if (clear == Dqn::ZeroClear::True) DqnMem_Set(str, 0, MAX); this = {}; }
void Clear (Dqn::ZeroClear clear = Dqn::ZeroClear::False) { if (clear == Dqn::ZeroClear::True) DqnMem_Set(str, 0, MAX); this = {}; }
};
template <unsigned int MAX>
FILE_SCOPE bool
FILE_SCOPE int
DqnFixedString__VSprintf(DqnFixedString<MAX> *me, char const *fmt, va_list argList, int bufOffset)
{
LOCAL_PERSIST char tmp[STB_SPRINTF_MIN];
auto SprintfCallback = [](char *buf, void *user, int len) -> char *
int result = 0;
if (Dqn::IS_DEBUG)
{
// TODO(doyle): Do the mem copy here into the string
(void)len; (void)user;
return buf;
};
LOCAL_PERSIST char tmp[STB_SPRINTF_MIN];
auto SprintfCallback = [](char *buf, void *user, int len) -> char *
{
(void)len; (void)user;
return buf;
};
char *bufStart = me->str + bufOffset;
i32 const reqLen = Dqn_vsprintfcb(SprintfCallback, nullptr, tmp, fmt, argList) + 1 /*NULL*/;
i32 const remainingSpace = static_cast<i32>((me->str + MAX) - bufStart);
char *bufStart = me->str + bufOffset;
i32 const reqLen = Dqn_vsprintfcb(SprintfCallback, nullptr, tmp, fmt, argList) + 1 /*NULL*/;
i32 const remainingSpace = static_cast<i32>((me->str + MAX) - bufStart);
i32 numToCopy = DQN_MIN(remainingSpace, reqLen);
i32 numCopiedNotInclNull = Dqn_vsnprintf(bufStart, numToCopy, fmt, argList);
me->len = (bufOffset == 0) ? numCopiedNotInclNull : me->len + numCopiedNotInclNull;
i32 numToCopy = DQN_MIN(remainingSpace, reqLen);
i32 numCopiedNotInclNull = Dqn_vsnprintf(bufStart, numToCopy, fmt, argList);
me->len = (bufOffset == 0) ? numCopiedNotInclNull : me->len + numCopiedNotInclNull;
DQN_ASSERT(numToCopy == (numCopiedNotInclNull + 1));
result = numCopiedNotInclNull;
}
else
{
char *bufStart = me->str + bufOffset;
i32 const remainingSpace = static_cast<i32>((me->str + MAX) - bufStart);
result = Dqn_vsnprintf(bufStart, remainingSpace, fmt, argList);
}
bool result = (numToCopy == (numCopiedNotInclNull + 1));
return result;
}
template <unsigned int MAX>
bool DqnFixedString<MAX>::VSprintf(char const *fmt, va_list argList)
int DqnFixedString<MAX>::VSprintf(char const *fmt, va_list argList)
{
int bufOffset = 0;
bool result = DqnFixedString__VSprintf(this, fmt, argList, bufOffset);
int result = DqnFixedString__VSprintf(this, fmt, argList, bufOffset);
return result;
}
template <unsigned int MAX>
bool DqnFixedString<MAX>::Sprintf(char const *fmt, ...)
int DqnFixedString<MAX>::Sprintf(char const *fmt, ...)
{
va_list argList;
va_start(argList, fmt);
bool result = this->VSprintf(fmt, argList);
int result = this->VSprintf(fmt, argList);
va_end(argList);
return result;
}
template <unsigned int MAX>
bool DqnFixedString<MAX>::VSprintfAppend(char const *fmt, va_list argList)
int DqnFixedString<MAX>::VSprintfAppend(char const *fmt, va_list argList)
{
int bufOffset = this->len;
bool result = DqnFixedString__VSprintf(this, fmt, argList, bufOffset);
int result = DqnFixedString__VSprintf(this, fmt, argList, bufOffset);
return result;
}
template <unsigned int MAX>
bool DqnFixedString<MAX>::SprintfAppend(char const *fmt, ...)
int DqnFixedString<MAX>::SprintfAppend(char const *fmt, ...)
{
va_list argList;
va_start(argList, fmt);
bool result = this->VSprintfAppend(fmt, argList);
int result = this->VSprintfAppend(fmt, argList);
va_end(argList);
return result;
}