Sven Luethi
e950fcec8f
modified: firmware/main/include/lib.h modified: firmware/main/src/http_client.c modified: firmware/main/src/main.c
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
#ifndef LIB_H
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#define LIB_H
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// Helper function to reverse a string
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void reverse(char* str, int len) {
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int i = 0, j = len - 1;
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while (i < j) {
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char temp = str[i];
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str[i] = str[j];
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str[j] = temp;
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i++;
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j--;
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}
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}
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// Helper function to convert an integer to a string
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int intToStr(int x, char str[], int d) {
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int i = 0;
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while (x) {
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str[i++] = (x % 10) + '0';
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x = x / 10;
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}
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// If the number of digits required is more, then add 0s at the beginning
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while (i < d)
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str[i++] = '0';
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reverse(str, i);
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str[i] = '\0';
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return i;
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}
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char* floatToString(float num) {
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// Allocate memory for the string
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char* str = (char*)malloc(50 * sizeof(char));
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if (str == NULL) {
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// If memory allocation fails, return NULL
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return NULL;
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}
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// Handle integer part
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int intPart = (int)num;
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int i = intToStr(intPart, str, 0);
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// Handle fractional part
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float fractionalPart = num - (float)intPart;
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if (fractionalPart < 0) {
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fractionalPart = -fractionalPart;
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}
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if (fractionalPart != 0) {
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str[i++] = '.'; // Add decimal point
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// Consider precision up to 6 digits after the decimal point
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for (int j = 0; j < 6; j++) {
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fractionalPart = fractionalPart * 10;
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int fracIntPart = (int)fractionalPart;
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str[i++] = fracIntPart + '0';
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fractionalPart = fractionalPart - fracIntPart;
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}
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}
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str[i] = '\0'; // Null-terminate the string
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return str;
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}
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// Function to convert an integer to a string
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char* intToString(int num)
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{
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// Allocate memory for the string
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char* str = (char*)malloc(50 * sizeof(char));
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int i = 0;
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// Save the sign of the number
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int sign = num;
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// If the number is negative, make it positive
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if (num < 0) {
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num = -num;
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}
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// Extract digits from the number and add them to the
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// string
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do {
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// Convert integer digit to character
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str[i++] = num % 10 + '0';
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} while ((num /= 10) > 0);
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// If the number was negative, add a minus sign to the
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// string
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if (sign < 0) {
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str[i++] = '-';
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}
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// Null-terminate the string
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str[i] = '\0';
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// Reverse the string to get the correct order
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for (int j = 0, k = i - 1; j < k; j++, k--) {
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char temp = str[j];
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str[j] = str[k];
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str[k] = temp;
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}
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return str;
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}
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#endif
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