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Greatly improved XML Parser error messages.

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svn-id: r34803
This commit is contained in:
Vicent Marti 2008-10-14 19:00:21 +00:00
parent 1c374dcf35
commit cda3086782
2 changed files with 59 additions and 48 deletions
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106
common/xmlparser.cpp
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@ -36,61 +36,71 @@ using namespace Graphics;
bool XMLParser::parserError(const char *errorString, ...) {
_state = kParserError;
int original_pos = _stream->pos();
int pos = original_pos;
int lineCount = 1;
int lineStart = 0;
if (_fileName == "Memory Stream") {
lineStart = MAX(0, original_pos - 35);
lineCount = 0;
} else {
do {
if (_char == '\n' || _char == '\r') {
lineCount++;
if (lineStart == 0)
lineStart = MAX(pos + 1, original_pos - 60);
}
_stream->seek(-1, SEEK_CUR);
} while (_stream->pos() > 0);
}
char lineStr[70];
_stream->seek(original_pos - 35, SEEK_SET);
_stream->readLine_NEW(lineStr, 70);
for (int i = 0; i < 70; ++i)
if (lineStr[i] == '\n')
lineStr[i] = ' ';
const int startPosition = _stream->pos();
const int middle = kErrorMessageWidth / 2;
int currentPosition = startPosition;
int lineCount = 1, realMiddle = 0;
char errorBuffer[kErrorMessageWidth];
char c, *errorKeyStart = 0;
_stream->seek(0, SEEK_SET);
while (currentPosition--) {
c = _stream->readByte();
if (c == '\n' || c == '\r')
lineCount++;
}
_stream->seek(-middle, SEEK_CUR);
for (int i = 0, j = 0; i < kErrorMessageWidth; ++i, ++j) {
c = _stream->readByte();
if (c == '\n' || c == '\r') {
errorBuffer[i++] = ' ';
j++;
while (c && isspace(c)) {
c = _stream->readByte();
j++;
}
}
errorBuffer[i] = c;
if (!realMiddle && j >= middle)
realMiddle = i;
}
for (int i = realMiddle; i >= 0; --i)
if (errorBuffer[i] == '<') {
errorKeyStart = &errorBuffer[i];
break;
}
for (int i = realMiddle; i < kErrorMessageWidth; ++i)
if (errorBuffer[i] == '>') {
errorBuffer[i + 1] = 0;
break;
}
fprintf(stderr, "\n File <%s>, line %d:\n", _fileName.c_str(), lineCount);
if (!errorKeyStart)
fprintf(stderr, "...%s%s\n", errorBuffer, errorBuffer[strlen(errorBuffer) - 1] == '>' ? "" : "...");
else
fprintf(stderr, "%s%s\n", errorKeyStart, errorBuffer[strlen(errorBuffer) - 1] == '>' ? "" : "...");
printf("\n File <%s>, line %d:\n", _fileName.c_str(), lineCount);
bool startFull = lineStr[0] == '<';
bool endFull = lineStr[strlen(lineStr) - 1] == '>';
printf("%s%s%s\n", startFull ? "" : "...", lineStr, endFull ? "" : "...");
int cursor = 35;
if (!startFull)
cursor += 3;
while (cursor--)
printf(" ");
printf("^\n");
printf("Parser error: ");
fprintf(stderr, "\nParser error: ");
va_list args;
va_start(args, errorString);
vprintf(errorString, args);
vfprintf(stderr, errorString, args);
va_end(args);
printf("\n\n");
fprintf(stderr, "\n\n");
return false;
}