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Interferometer Test Program
[matches/MCTX3420.git]
/
server
/
data.c
diff --git
a/server/data.c
b/server/data.c
index
57b51ff
..
add8d9f
100644
(file)
--- a/
server/data.c
+++ b/
server/data.c
@@
-14,8
+14,8
@@
void Data_Init(DataFile * df)
{
// Everything is NULL
df->filename = NULL;
-
df->read_file = NULL
;
- df->
write_
file = NULL;
+
pthread_mutex_init(&(df->mutex), NULL)
;
+ df->file = NULL;
}
/**
@@
-29,26
+29,17
@@
void Data_Open(DataFile * df, const char * filename)
assert(df != NULL);
// Set the filename
- df->filename =
filename
;
+ df->filename =
strdup(filename)
;
// Set number of DataPoints
df->num_points = 0;
- // Set
write FILE*
- df->
write_file = fopen(filename, "w
");
- if (df->
write_
file == NULL)
+ // Set
file pointer
+ df->
file = fopen(filename, "wb+
");
+ if (df->file == NULL)
{
Fatal("Error opening DataFile %s - %s", filename, strerror(errno));
}
-
- // Set read FILE*
- df->read_file = fopen(filename, "r");
- if (df->read_file == NULL)
- {
- Fatal("Error opening DataFile %s - %s", filename, strerror(errno));
- }
-
-
}
/**
@@
-61,11
+52,13
@@
void Data_Close(DataFile * df)
//TODO: Write data to TSV?
+ fclose(df->file);
+
// Clear the FILE*s
- df->read_file = NULL;
- df->write_file = NULL;
+ df->file = NULL;
// Clear the filename
+ free(df->filename);
df->filename = NULL;
}
@@
-77,18
+70,19
@@
void Data_Close(DataFile * df)
*/
void Data_Save(DataFile * df, DataPoint * buffer, int amount)
{
+ pthread_mutex_lock(&(df->mutex));
assert(df != NULL);
assert(buffer != NULL);
assert(amount >= 0);
// Go to the end of the file
- if (fseek(df->
write_
file, 0, SEEK_END) < 0)
+ if (fseek(df->file, 0, SEEK_END) < 0)
{
Fatal("Error seeking to end of DataFile %s - %s", df->filename, strerror(errno));
}
// Attempt to write the DataPoints
- int amount_written = fwrite(buffer, sizeof(DataPoint), amount, df->
write_
file);
+ int amount_written = fwrite(buffer, sizeof(DataPoint), amount, df->file);
// Check if the correct number of points were written
if (amount_written != amount)
@@
-97,10
+91,9
@@
void Data_Save(DataFile * df, DataPoint * buffer, int amount)
}
// Update number of DataPoints
-
pthread_mutex_lock(&(df->mutex))
;
- df->num_points += amount_written;
+
df->num_points += amount_written
;
+
pthread_mutex_unlock(&(df->mutex));
-
}
/**
@@
-113,88
+106,91
@@
void Data_Save(DataFile * df, DataPoint * buffer, int amount)
*/
int Data_Read(DataFile * df, DataPoint * buffer, int index, int amount)
{
+ pthread_mutex_lock(&(df->mutex));
+
assert(df != NULL);
assert(buffer != NULL);
assert(index >= 0);
assert(amount > 0);
// If we would read past the end of the file, reduce the amount of points to read
- pthread_mutex_lock(&(df->mutex));
-
if (index + amount >=
df->num_points)
-
{
-
Log(LOGDEBUG, "Requested %d points but will only read %d to get to EOF", amount, df->num_points - index
);
-
amount = df->num_points - index;
-
}
- pthread_mutex_unlock(&(df->mutex));
+
+
if (index + amount >
df->num_points)
+ {
+
Log(LOGDEBUG, "Requested %d points but will only read %d to get to EOF (%d)", amount, df->num_points - index, df->num_points
);
+ amount = df->num_points - index;
+ }
+
// Go to position in file
- if (fseek(df->
read_
file, index*sizeof(DataPoint), SEEK_SET))
+ if (fseek(df->file, index*sizeof(DataPoint), SEEK_SET))
{
Fatal("Error seeking to position %d in DataFile %s - %s", index, df->filename, strerror(errno));
}
// Attempt to read the DataPoints
- int amount_read = fread(buffer, sizeof(DataPoint), amount, df->
read_
file);
+ int amount_read = fread(buffer, sizeof(DataPoint), amount, df->file);
// Check if correct number of points were read
if (amount_read != amount)
{
-
Fatal(
"Read %d points instead of %d from DataFile %s - %s", amount_read, amount, df->filename, strerror(errno));
+
Log(LOGERR,
"Read %d points instead of %d from DataFile %s - %s", amount_read, amount, df->filename, strerror(errno));
}
- return amount;
+ pthread_mutex_unlock(&(df->mutex));
+ return amount_read;
}
/**
* Print data points between two indexes using a given format
* @param df - DataFile to print
* @param start_index - Index to start at (inclusive)
- * @param end_index - Index to end at (
in
clusive)
+ * @param end_index - Index to end at (
ex
clusive)
* @param format - The format to use
*/
void Data_PrintByIndexes(DataFile * df, int start_index, int end_index, DataFormat format)
{
assert(df != NULL);
assert(start_index >= 0);
- assert(end_index <= df->num_points-1);
+ assert(end_index >= 0);
+ assert(end_index <= df->num_points || df->num_points == 0);
const char * fmt_string; // Format for each data point
- char sep
e
rator; // Character used to seperate successive data points
+ char sep
a
rator; // Character used to seperate successive data points
- // Determine what format string and sep
e
rator character to use
+ // Determine what format string and sep
a
rator character to use
switch (format)
{
case JSON:
fmt_string = "[%f,%f]";
- sep
e
rator = ',';
+ sep
a
rator = ',';
// For JSON we need an opening bracket
FCGI_PrintRaw("[");
break;
case TSV:
fmt_string = "%f\t%f";
- sep
e
rator = '\n';
+ sep
a
rator = '\n';
break;
}
- DataPoint buffer[DATA_BUFSIZ]; // Buffer
-
+ DataPoint buffer[DATA_BUFSIZ] = {{0}}; // Buffer
int index = start_index;
// Repeat until all DataPoints are printed
- while (index <
=
end_index)
+ while (index < end_index)
{
// Fill the buffer from the DataFile
int amount_read = Data_Read(df, buffer, index, DATA_BUFSIZ);
// Print all points in the buffer
- for (int i = 0; i < amount_read; ++i)
+ for (int i = 0; i < amount_read
&& index < end_index
; ++i)
{
// Print individual DataPoint
FCGI_PrintRaw(fmt_string, buffer[i].time_stamp, buffer[i].value);
- // Last sep
e
rator is not required
+ // Last sep
a
rator is not required
if (index+1 < end_index)
- FCGI_PrintRaw("%c", sep
e
rator);
+ FCGI_PrintRaw("%c", sep
a
rator);
// Advance the position in the DataFile
++index;
@@
-217,32
+213,25
@@
void Data_PrintByIndexes(DataFile * df, int start_index, int end_index, DataForm
* Prints nothing if the time stamp
* @param df - DataFile to print
* @param start_time - Time to start from (inclusive)
- * @param end_time - Time to end at (
in
clusive)
+ * @param end_time - Time to end at (
ex
clusive)
* @param format - The format to use
*/
void Data_PrintByTimes(DataFile * df, double start_time, double end_time, DataFormat format)
{
assert(df != NULL);
- assert(start_time > 0);
- assert(end_time > 0);
- assert(end_time > start_time);
-
- DataPoint closest;
-
- // Get starting index
- int start_index = Data_FindByTime(df, start_time, &closest);
-
- // Start time is greater than most recent time stamp
- if (start_index >= df->num_points-1 && closest.time_stamp < start_time)
+ //Clamp boundaries
+ if (start_time < 0)
+ start_time = 0;
+ if (end_time < 0)
+ end_time = 0;
+
+ int start_index = 0, end_index = 0;
+ if (start_time < end_time)
{
- Data_PrintByIndexes(df, 0, 0, format); // Will print "empty" dataset
-
return
;
+ start_index = Data_FindByTime(df, start_time, NULL);
+
end_index = Data_FindByTime(df, end_time, NULL)
;
}
- // Get finishing index
- int end_index = Data_FindByTime(df, end_time, &closest);
-
- // Print data between the indexes
Data_PrintByIndexes(df, start_index, end_index, format);
}
@@
-257,7
+246,7
@@
int Data_FindByTime(DataFile * df, double time_stamp, DataPoint * closest)
{
assert(df != NULL);
assert(time_stamp >= 0);
- assert(closest != NULL);
+
//
assert(closest != NULL);
DataPoint tmp; // Current DataPoint in binary search
@@
-297,3
+286,74
@@
int Data_FindByTime(DataFile * df, double time_stamp, DataPoint * closest)
return index;
}
+
+/**
+ * Helper; handle FCGI response that requires data
+ * Should be called first.
+ * @param df - DataFile to access
+ * @param start - Info about start_time param
+ * @param end - Info about end_time param
+ * @param fmt - Info about format param
+ * @param current_time - Current time
+ */
+void Data_Handler(DataFile * df, FCGIValue * start, FCGIValue * end, DataFormat format, double current_time)
+{
+ double start_time = *(double*)(start->value);
+ double end_time = *(double*)(end->value);
+
+ if (format == JSON)
+ {
+ FCGI_JSONKey("data");
+ }
+
+ // If a time was specified
+ if (FCGI_RECEIVED(start->flags) || FCGI_RECEIVED(end->flags))
+ {
+ // Wrap times relative to the current time
+ if (start_time < 0)
+ start_time += current_time;
+ if (end_time < 0)
+ end_time += current_time;
+
+ // Print points by time range
+ Data_PrintByTimes(df, start_time, end_time, format);
+
+ }
+ else // No time was specified; just return a recent set of points
+ {
+ pthread_mutex_lock(&(df->mutex));
+ int start_index = df->num_points-DATA_BUFSIZ;
+ int end_index = df->num_points-1;
+ pthread_mutex_unlock(&(df->mutex));
+
+ // Bounds check
+ if (start_index < 0)
+ start_index = 0;
+ if (end_index < 0)
+ end_index = 0;
+
+ // Print points by indexes
+ Data_PrintByIndexes(df, start_index, end_index, format);
+ }
+
+}
+
+/**
+ * Helper - Convert human readable format string to DataFormat
+ * @param fmt - FCGIValue to use
+ */
+DataFormat Data_GetFormat(FCGIValue * fmt)
+{
+ char * fmt_str = *(char**)(fmt->value);
+ // Check if format type was specified
+ if (FCGI_RECEIVED(fmt->flags))
+ {
+ if (strcmp(fmt_str, "json") == 0)
+ return JSON;
+ else if (strcmp(fmt_str, "tsv") == 0)
+ return TSV;
+ else
+ Log(LOGERR, "Unknown format type \"%s\"", fmt_str);
+ }
+ return JSON;
+}
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