/*
* Run through all lines in the file, determining whether they're blank,
* comments, or possibly have a tag entry.
*
* This is a very "loose" scan. We don't try to detect syntax errors here.
* The later pass is more careful, but the number of tags found there must
* match the number of tags found here.
*
* Returns the number of potential tag entries found.
*/
static int countMapLines(const EventTagMap* map)
{
int numTags, unknown;
const char* cp;
const char* endp;
cp = (const char*) map->mapAddr;
endp = cp + map->mapLen;
numTags = 0;
unknown = 1;
while (cp < endp) {
if (*cp == '\n') {
unknown = 1;
} else if (unknown) {
if (isCharDigit(*cp)) {
/* looks like a tag to me */
numTags++;
unknown = 0;
} else if (isCharWhitespace(*cp)) {
/* might be leading whitespace before tag num, keep going */
} else {
/* assume comment; second pass can complain in detail */
unknown = 0;
}
} else {
/* we've made up our mind; just scan to end of line */
}
cp++;
}
return numTags;
}
/*
* Scan one tag line.
*
* "*pData" should be pointing to the first digit in the tag number. On
* successful return, it will be pointing to the last character in the
* tag line (i.e. the character before the start of the next line).
*
* Returns 0 on success, nonzero on failure.
*/
static int scanTagLine(char** pData, EventTag* tag, int lineNum)
{
char* cp = *pData;
char* startp;
char* endp;
unsigned long val;
startp = cp;
while (isCharDigit(*++cp))
;
*cp = '\0';
val = strtoul(startp, &endp, 10);
assert(endp == cp);
if (endp != cp)
fprintf(stderr, "ARRRRGH\n");
tag->tagIndex = val;
while (*++cp != '\n' && isCharWhitespace(*cp))
;
if (*cp == '\n') {
fprintf(stderr,
"%s: missing tag string on line %d\n", OUT_TAG, lineNum);
return -1;
}
tag->tagStr = cp;
while (isCharValidTag(*++cp))
;
if (*cp == '\n') {
/* null terminate and return */
*cp = '\0';
} else if (isCharWhitespace(*cp)) {
/* CRLF or trailin spaces; zap this char, then scan for the '\n' */
*cp = '\0';
/* just ignore the rest of the line till \n
TODO: read the tag description that follows the tag name
*/
while (*++cp != '\n') {
}
} else {
fprintf(stderr,
"%s: invalid tag chars on line %d\n", OUT_TAG, lineNum);
return -1;
}
*pData = cp;
//printf("+++ Line %d: got %d '%s'\n", lineNum, tag->tagIndex, tag->tagStr);
return 0;
}
/*
* Parse the tags out of the file.
*/
static int parseMapLines(EventTagMap* map)
{
int tagNum, lineStart, lineNum;
char* cp;
char* endp;
cp = (char*) map->mapAddr;
endp = cp + map->mapLen;
/* insist on EOL at EOF; simplifies parsing and null-termination */
if (*(endp-1) != '\n') {
return -1;
}
tagNum = 0;
lineStart = 1;
lineNum = 1;
while (cp < endp) {
//printf("{%02x}", *cp); fflush(stdout);
if (*cp == '\n') {
lineStart = 1;
lineNum++;
} else if (lineStart) {
if (*cp == '#') {
/* comment; just scan to end */
lineStart = 0;
} else if (isCharDigit(*cp)) {
/* looks like a tag; scan it out */
if (tagNum >= map->numTags) {
return -1;
}
if (scanTagLine(&cp, &map->tagArray[tagNum], lineNum) != 0)
return -1;
tagNum++;
lineNum++; // we eat the '\n'
/* leave lineStart==1 */
} else if (isCharWhitespace(*cp)) {
/* looks like leading whitespace; keep scanning */
} else {
return -1;
}
} else {
/* this is a blank or comment line */
}
cp++;
}
if (tagNum != map->numTags) {
return -1;
}
return 0;
}
/*
* Scan one tag line.
*
* "*pData" should be pointing to the first digit in the tag number. On
* successful return, it will be pointing to the last character in the
* tag line (i.e. the character before the start of the next line).
*
* Returns 0 on success, nonzero on failure.
*/
static int scanTagLine(char** pData, EventTag* tag, int lineNum)
{
char* cp = *pData;
char* startp;
char* endp;
unsigned long val;
startp = cp;
while (isCharDigit(*++cp))
;
*cp = '\0';
val = strtoul(startp, &endp, 10);
assert(endp == cp);
tag->tagIndex = val;
while (*++cp != '\n' && isCharWhitespace(*cp))
;
if (*cp == '\n') {
return -1;
}
tag->tagStr = cp;
while (isCharValidTag(*++cp))
;
if (*cp == '\n') {
/* null terminate and return */
*cp = '\0';
} else if (isCharWhitespace(*cp)) {
/* CRLF or trailin spaces; zap this char, then scan for the '\n' */
*cp = '\0';
/* just ignore the rest of the line till \n
TODO: read the tag description that follows the tag name
*/
while (*++cp != '\n') {
}
} else {
return -1;
}
*pData = cp;
return 0;
}
uint64_t atoi(const char* s) {
uint64_t n = 0;
while (isCharDigit(*s)) n = 10 * n + *s++ - '0';
return n;
}
