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Performance fix Ecc

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This commit is contained in:
Robert MacGregor 2016-03-12 16:45:43 -05:00
parent cfefaf581a
commit 9f50d3ef84
1 changed files with 63 additions and 58 deletions
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121
Sources/Ecc/Main.cpp
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@ -241,7 +241,7 @@ enum ESStatus
/* Determine whether or not our target ES file is indeed valid input. */ /* Determine whether or not our target ES file is indeed valid input. */
ESStatus GetESStatus(char *filename) ESStatus GetESStatus(char *filename)
{ {
ESStatus result = ESStatus::Good; ESStatus result = ESStatus::Empty;
// Read a temporary buffer of the entire file contents // Read a temporary buffer of the entire file contents
fseek(_fInput, 0, SEEK_END); fseek(_fInput, 0, SEEK_END);
@ -251,72 +251,77 @@ ESStatus GetESStatus(char *filename)
fread(temporaryBuffer, length, 1, _fInput); fread(temporaryBuffer, length, 1, _fInput);
fclose(_fInput); fclose(_fInput);
// First, let's remove line comments // Loop through each line
char *commentBegin = NULL; char* currentSequence = strtok(temporaryBuffer, "\n");
while (commentBegin = strstr(temporaryBuffer, "//"))
// No newlines, but it might still be valid.
if (!currentSequence)
currentSequence = temporaryBuffer;
bool inBlockComment = false;
do
{ {
size_t commentLength = length; size_t sequenceLength = strlen(currentSequence);
char* lineEnding = strstr(commentBegin, "\n"); for (size_t iteration = 0; iteration < sequenceLength; iteration++)
if (lineEnding)
commentLength = (size_t)(lineEnding) - (size_t)commentBegin;
memset(commentBegin, 0x20, commentLength);
}
// Then block comments
commentBegin = NULL;
while (commentBegin = strstr(temporaryBuffer, "/*"))
{
size_t commentLength = length;
char* commentEnd = strstr(commentBegin, "*/");
if (commentEnd)
commentLength = (size_t)(commentEnd + 3) - (size_t)commentBegin;
else
{ {
result = ESStatus::Error; // If we're still in a block comment, find the closing */
break; if (inBlockComment)
} {
char* blockClosing = strstr(currentSequence, "*/");
memset(commentBegin, 0x20, commentLength); if (!blockClosing)
} break;
else
// If we return here, it was because of unbalanced block comments {
if (result != ESStatus::Good) inBlockComment = false;
{ iteration = ((size_t)blockClosing - (size_t)currentSequence) + 2;
free(temporaryBuffer); }
return result; }
}
// If we find a // sequence, simply skip this line
// Now we just loop through the buffer until we find something that's not 0x20 or \n if (currentSequence[iteration] == '/' && currentSequence[iteration + 1] == '/')
result = ESStatus::Empty; break;
for (size_t iteration = 0; iteration < length; iteration++)
if (temporaryBuffer[iteration] != 0x20 && temporaryBuffer[iteration] != '\n') // If we find a /* on this line but not a closing */, skip this line
{ if (currentSequence[iteration] == '/' && currentSequence[iteration + 1] == '*')
size_t checkLength = length; {
char* checkStart = &temporaryBuffer[iteration]; // Is there a closing */ on this line?
char* blockClosing = strstr(currentSequence, "*/");
char* lineEnding = strstr(checkStart, "\n");
if (lineEnding) if (!blockClosing)
checkLength = (size_t)(lineEnding) - (size_t)checkStart; {
inBlockComment = true;
// Loop through and use isdigit to check all the digits break;
checkStart[checkLength + 1] = 0x00; }
else
for (int digit = 0; digit < strlen(checkStart); digit++) {
if (checkStart[digit] != 0x20 && checkStart[digit] != '\n' && isdigit(checkStart[digit])) iteration = ((size_t)blockClosing - (size_t)currentSequence) + 2;
result = ESStatus::Good; inBlockComment = false;
else if (checkStart[digit] != 0x20 && checkStart[digit] != '\n') continue;
}
}
if (iteration >= sequenceLength)
break;
// If we got to this point, we should be able to read only a number on this line
for (size_t checkIteration = 0; checkIteration < sequenceLength; checkIteration++)
if (currentSequence[checkIteration] != '\n' && currentSequence[checkIteration] != 0x20 && !isdigit(currentSequence[checkIteration]))
{ {
// If this occurs, then the first non-whitespace line we read wasn't a number.
result = ESStatus::Error; result = ESStatus::Error;
break; break;
} }
else if (currentSequence[checkIteration] != '\n' && currentSequence[checkIteration] != 0x20)
result = ESStatus::Good;
break; free(temporaryBuffer);
if (result == ESStatus::Good)
_fInput = FOpen(filename, "r");
return result;
} }
}
while(currentSequence = strtok(NULL, "\n"));
free(temporaryBuffer); free(temporaryBuffer);
if (result == ESStatus::Good) if (result == ESStatus::Good)