querying the throttle position from the db

src/arrays.c

@@ -1,5 +1,6 @@
 #include "arrays.h"
 #include <stdint.h>
+#include <stdlib.h>
 
 bool bool_array_get(const bool_array *array, int32_t index) {
     if (index >= 0 && index < array->length) {
@@ -280,12 +281,23 @@ void float_array_set(float_array *array, const float value, int32_t index) {
 
     if (index == -1) {
         array->items[array->length - 1] = value;
+        array->length++;
         return;
     }
 
     array->items[index] = value;
 }
 
+void float_array_allocate(float_array *array, int32_t capacity) {
+    array->items = calloc(capacity, sizeof(float));
+    array->capacity = capacity;
+}
+
+void float_array_init(float_array *array) {
+    array->capacity = 0;
+    array->length = 0;
+}
+
 double double_array_get(const double_array *array, int32_t index) {
     if (index >= 0 && index < array->length) {
         return array->items[index];

src/arrays.h

@@ -12,6 +12,7 @@ typedef struct {
 } bool_array;
 
 bool bool_array_get(const bool_array *array, int32_t index);
+void bool_array_set(bool_array *array, const bool value, int32_t index);
 
 // --- Char (Strings/Bytes) ---
 typedef struct {
@@ -21,6 +22,7 @@ typedef struct {
 } char_array;
 
 char char_array_get(const char_array *array, int32_t index);
+void char_array_set(char_array *array, const char value, int32_t index);
 
 // --- Signed Integers ---
 typedef struct {
@@ -30,6 +32,7 @@ typedef struct {
 } int8_array;
 
 int8_t int8_array_get(const int8_array *array, int32_t index);
+void int8_array_set(int8_array *array, const int8_t value, int32_t index);
 
 typedef struct {
     int16_t *items;
@@ -38,6 +41,7 @@ typedef struct {
 } int16_array;
 
 int16_t int16_array_get(const int16_array *array, int32_t index);
+void int16_array_set(int16_array *array, const int16_t value, int32_t index);
 
 typedef struct {
     int32_t *items;
@@ -46,6 +50,7 @@ typedef struct {
 } int32_array;
 
 int32_t int32_array_get(const int32_array *array, int32_t index);
+void int32_array_set(int32_array *array, const int32_t value, int32_t index);
 
 typedef struct {
     int64_t *items;
@@ -54,6 +59,7 @@ typedef struct {
 } int64_array;
 
 int64_t int64_array_get(const int64_array *array, int32_t index);
+void int64_array_set(int64_array *array, const int64_t value, int32_t index);
 
 // --- Unsigned Integers ---
 typedef struct {
@@ -63,6 +69,7 @@ typedef struct {
 } uint8_array;
 
 uint8_t uint8_array_get(const uint8_array *array, int32_t index);
+void uint8_array_set(uint8_array *array, const uint8_t value, int32_t index);
 
 typedef struct {
     uint16_t *items;
@@ -71,6 +78,7 @@ typedef struct {
 } uint16_array;
 
 uint16_t uint16_array_get(const uint16_array *array, int32_t index);
+void uint16_array_set(uint16_array *array, const uint16_t value, int32_t index);
 
 typedef struct {
     uint32_t *items;
@@ -79,6 +87,7 @@ typedef struct {
 } uint32_array;
 
 uint32_t uint32_array_get(const uint32_array *array, int32_t index);
+void uint32_array_set(uint32_array *array, const uint32_t value, int32_t index);
 
 typedef struct {
     uint64_t *items;
@@ -87,6 +96,7 @@ typedef struct {
 } uint64_array;
 
 uint64_t uint64_array_get(const uint64_array *array, int32_t index);
+void uint64_array_set(uint64_array *array, const uint64_t value, int32_t index);
 
 // --- Floating Point ---
 typedef struct {
@@ -96,6 +106,9 @@ typedef struct {
 } float_array;
 
 float float_array_get(const float_array *array, int32_t index);
+void float_array_set(float_array *array, const float value, int32_t index);
+void float_array_allocate(float_array *array, int32_t capacity);
+void float_array_init(float_array *array);
 
 typedef struct {
     double *items;
@@ -104,5 +117,6 @@ typedef struct {
 } double_array;
 
 double double_array_get(const double_array *array, int32_t index);
+void double_array_set(double_array *array, const double value, int32_t index);
 
 #endif

src/lapinfo.c

@@ -3,16 +3,10 @@
 
 #include "lapinfo.h"
 
-void free_telemetry_info(TelemetryInfo *t) {
-    free(t->data);
-    free(t->validity);
-    // free(t);
-}
-
 void destroyLapinfo(LapInfo *info) {
-    free_telemetry_info(&info->throttle_pos);
-    free_telemetry_info(&info->brake_pos);
-    free_telemetry_info(&info->steering_pos);
-    free_telemetry_info(&info->speed);
-    // free(info);
+    free(info->throttle_pos.items);
+    free(info->brake_pos.items);
+    free(info->steering_pos.items);
+    free(info->speed.items);
+    free(info);
 }

src/lapinfo.h

@@ -3,6 +3,8 @@
 
 #include <stdint.h>
 
+#include "arrays.h"
+
 typedef enum {
     BOOL,
     INT,
@@ -22,10 +24,10 @@ typedef struct {
 typedef struct {
     int lap_number;
     double start_time;
-    TelemetryInfo throttle_pos; // freq: 50
-    TelemetryInfo brake_pos;    // freq: 50
-    TelemetryInfo steering_pos; // freq: 100
-    TelemetryInfo speed;
+    float_array throttle_pos;
+    float_array brake_pos;
+    float_array steering_pos; // freq: 100
+    float_array speed;
 } LapInfo;
 
 void free_telemetry_info(TelemetryInfo *t);

src/main.c

@@ -5,6 +5,7 @@
 #include <string.h>
 #include <sys/stat.h>
 
+#include "arrays.h"
 #include "exit_code.h"
 #include "lapinfo.h"
 
@@ -30,7 +31,30 @@ bool is_valid_path(const char *path) {
     return true;
 }
 
-void get_data_from_db(const char *query, duckdb_connection *conn, TelemetryInfo *info) {
+void allocate_array_for_db_data(float_array *array, const char *table, duckdb_connection *conn) {
+    char query[100];
+    sprintf(query, "Select count(*) from \"%s\"", table);
+    duckdb_result result;
+    duckdb_query(*conn, query, &result);
+
+    duckdb_data_chunk chunk = duckdb_fetch_chunk(result);
+    if (!chunk) {
+        return;
+    }
+
+    duckdb_vector col1 = duckdb_data_chunk_get_vector(chunk, 0);
+    int32_t *col1_data = (int32_t *)duckdb_vector_get_data(col1);
+    uint64_t *col1_validity = duckdb_vector_get_validity(col1);
+
+    if (duckdb_validity_row_is_valid(col1_validity, 0)) {
+        printf("capycity of array: %d", col1_data[0]);
+        float_array_allocate(array, col1_data[0]);
+    }
+    duckdb_destroy_data_chunk(&chunk);
+    duckdb_destroy_result(&result);
+}
+
+void get_data_from_db(const char *query, duckdb_connection *conn, float_array *info) {
     duckdb_result result;
 
     duckdb_query(*conn, query, &result);
@@ -50,26 +74,7 @@ void get_data_from_db(const char *query, duckdb_connection *conn, TelemetryInfo
 
         for (idx_t row = 0; row < row_count; row++) {
             if (duckdb_validity_row_is_valid(col1_validity, row)) {
-                switch (info->type) {
-                case FLOAT:
-                    ((float *)info->data)[info->data_last_index] = ((float *)col1_data)[row];
-                    info->data_last_index++;
-                    break;
-                case BOOL:
-                    ((bool *)info->data)[info->data_last_index] = ((bool *)col1_data)[row];
-                    info->data_last_index++;
-                    break;
-                case DOUBLE:
-                    ((double *)info->data)[info->data_last_index] = ((double *)col1_data)[row];
-                    info->data_last_index++;
-                    break;
-                case INT:
-                    ((int32_t *)info->data)[info->data_last_index] = ((int32_t *)col1_data)[row];
-                    info->data_last_index++;
-                    break;
-                }
-            } else {
-                printf("NULL");
+                float_array_set(info, ((float *)col1_data)[row], -1);
             }
         }
 
@@ -184,7 +189,14 @@ int main(int argc, char **argv) {
     }
     printf("\n");
 
-    // get the per laptime data
+    // throttle
+    float_array throttle_data_all;
+    float_array_init(&throttle_data_all);
+    allocate_array_for_db_data(&throttle_data_all, "Throttle Pos", &conn);
+    get_data_from_db("Select value as FLOAT from \"Throttle Pos\"\n", &conn, &throttle_data_all);
+    for (int32_t i = 0; i < throttle_data_all.length; ++i) {
+        printf(" %f", float_array_get(&throttle_data_all, i));
+    }
 
     printf("Shutting down HardCompound!\n");