bool GrammarRead(Grammar *grammar, const char *fileName)
{
// Read the file.
grammar->fileName = fileName;
FILE *srcFile = fopen(fileName, "r");
if (srcFile == NULL)
{
AllocSprintf(&grammar->errMsg, "can't open '%s'", fileName);
return false;
}
// Go through it line by line.
grammar->lineNo = 1;
char line[4096];
while (fgets(line, sizeof(line), srcFile))
{
// Remove comments.
char *commentPos = strstr(line, "//");
if (commentPos != NULL)
{
*commentPos = 0;
}
// Remove trailing whitespace.
StringStripEnd(line);
// Skip empty lines.
if (line[0] != 0)
{
// Is it a definition line?
if (isalpha(line[0]))
{
// Parse a definition.
if (!GrammarParseDefinition(grammar, line))
goto grErrExit;
}
else if (isspace(line[0]))
{
// Parse an option.
if (!GrammarParseOption(grammar, line))
goto grErrExit;
}
else
{
// Unexpected character.
AllocSprintf(&grammar->errMsg, "unexpected character in %s line %d: '%s'", fileName, grammar->lineNo, line);
goto grErrExit;
}
}
grammar->lineNo++;
}
return true;
grErrExit:
fclose(srcFile);
return false;
}
bool GrammarRead(Grammar *grammar, const char *fileName)
{
// Read the file.
grammar->fileName = fileName;
if (!ReadFile(&grammar->src, &grammar->errMsg, fileName))
return false;
// Go through it line by line.
grammar->lineNo = 1;
char *line;
char *nextLine = grammar->src;
while (ReadLine(&line, &nextLine))
{
// Remove comments.
char *commentPos = strstr(line, "//");
if (commentPos != NULL)
{
*commentPos = 0;
}
// Remove trailing whitespace.
StringStripEnd(line);
// Skip empty lines.
if (line[0] != 0)
{
// Is it a definition line?
if (isalnum(line[0]))
{
// Parse a definition.
if (!GrammarParseDefinition(grammar, line))
return false;
}
else if (isspace(line[0]))
{
// Parse an option.
if (!GrammarParseOption(grammar, line))
return false;
}
else
{
// Unexpected character.
AllocSprintf(&grammar->errMsg, "unexpected character in %s line %d: '%s'", fileName, grammar->lineNo, line);
return false;
}
}
grammar->lineNo++;
}
return true;
}
