64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "string.h"
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char *string_concat(const char *s1, const char *s2) {
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char *result;
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result = malloc(strlen(s1) + strlen(s2) + 1); // +1 for the null-terminator
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strcpy(result, s1);
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strcat(result, s2);
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return result;
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}
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unsigned int string_trim(char *str) {
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// https://www.delftstack.com/howto/c/trim-string-in-c/
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unsigned int start;
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unsigned int end;
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start = 0;
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end = strlen(str) - 1;
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if (end == 0) {
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return 0;
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}
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// Remove leading whitespace
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while (str[start] == ' ') {
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start++;
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}
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// Remove trailing whitespace
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while (end > start && str[end] == ' ') {
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end--;
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}
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// If the string was trimmed, adjust the null terminator
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if (start > 0 || end < (strlen(str) - 1)) {
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memmove(str, str + start, end - start + 1);
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str[end - start + 1] = '\0';
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}
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return end - start + 1;
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}
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static bool is_digit(char c) { return c >= '0' && c <= '9'; }
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bool string_is_number(char *value) {
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unsigned long value_len;
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unsigned int i;
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if (value == NULL) {
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return false;
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}
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value_len = strlen(value);
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for (i = 0; i < value_len; i++) {
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if (!is_digit(value[i])) {
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return false;
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}
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}
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return true;
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} |