static tagFile *initialize (const char *const filePath, tagFileInfo *const info)
{
tagFile *result = (tagFile*) malloc (sizeof (tagFile));
if (result != NULL)
{
memset (result, 0, sizeof (tagFile));
growString (&result->line);
growString (&result->name);
result->fields.max = 20;
result->fields.list = (tagExtensionField*) malloc (
result->fields.max * sizeof (tagExtensionField));
result->fp = fopen (filePath, "r");
if (result->fp == NULL)
{
free (result);
result = NULL;
info->status.error_number = errno;
}
else
{
fseek (result->fp, 0, SEEK_END);
result->size = ftell (result->fp);
rewind (result->fp);
readPseudoTags (result, info);
info->status.opened = 1;
result->initialized = 1;
}
}
return result;
}
static int readTagLineRaw(tagFile * const file)
{
int result = 1;
int reReadLine;
/* If reading the line places any character other than a null or a
* newline at the last character position in the buffer (one less than
* the buffer size), then we must resize the buffer and reattempt to read
* the line.
*/
do
{
char *const pLastChar = file->line.buffer + file->line.size - 2;
char *line;
file->pos = ftell(file->fp);
reReadLine = 0;
*pLastChar = '\0';
line = fgets(file->line.buffer, (int) file->line.size, file->fp);
if (line == NULL)
{
/* read error */
if (!feof(file->fp))
perror("readTagLine");
result = 0;
}
else if (*pLastChar != '\0' && *pLastChar != '\n' && *pLastChar != '\r')
{
/* buffer overflow */
growString(&file->line);
fseek(file->fp, file->pos, SEEK_SET);
reReadLine = 1;
}
else
{
size_t i = strlen(file->line.buffer);
while (i > 0 &&
(file->line.buffer[i - 1] == '\n'
|| file->line.buffer[i - 1] == '\r'))
{
file->line.buffer[i - 1] = '\0';
--i;
}
}
}
while (reReadLine && result);
if (result)
copyName(file);
return result;
}
/** Copy name of tag out of tag line */
static void copyName (tagFile *const file)
{
size_t length;
const char *end = strchr (file->line.buffer, '\t');
if (end == NULL)
{
end = strchr (file->line.buffer, '\n');
if (end == NULL)
end = strchr (file->line.buffer, '\r');
}
if (end != NULL)
length = end - file->line.buffer;
else
length = strlen (file->line.buffer);
while (length >= file->name.size)
growString (&file->name);
strncpy (file->name.buffer, file->line.buffer, length);
file->name.buffer [length] = '\0';
}