103 lines
No EOL
2.2 KiB
C++
103 lines
No EOL
2.2 KiB
C++
#include "text.h"
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#include <string.h>
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// Utility functions for characters and strings
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char to_upper(char c) {
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return (c >= 'a' && c <= 'z') ? (c - 'a' + 'A') : c;
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}
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bool is_digit(char c) {
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return (c >= '0') && (c <= '9');
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}
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bool is_letter(char c) {
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return ((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'));
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}
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bool is_space(char c) {
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return (c == ' ');
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}
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bool in_range(char c, char min, char max) {
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return (c >= min) && (c <= max);
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}
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bool starts_with(const char *string, const char *prefix) {
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return 0 == memcmp(string, prefix, strlen(prefix));
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}
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bool equals(const char *string1, const char *string2) {
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return 0 == strcmp(string1, string2);
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}
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// Text message formatting:
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// - replaces lowercase letters with uppercase
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// - merges consecutive spaces into single space
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void fmtmsg(char *msg_out, const char *msg_in) {
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char c;
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char last_out = 0;
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while ( (c = *msg_in) ) {
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if (c != ' ' || last_out != ' ') {
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last_out = to_upper(c);
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*msg_out = last_out;
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++msg_out;
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}
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++msg_in;
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}
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*msg_out = 0; // Add zero termination
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}
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// Parse a 2 digit integer from string
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int dd_to_int(const char *str, int length) {
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int result = 0;
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bool negative;
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int i;
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if (str[0] == '-') {
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negative = true;
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i = 1; // Consume the - sign
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}
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else {
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negative = false;
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i = (str[0] == '+') ? 1 : 0; // Consume a + sign if found
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}
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while (i < length) {
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if (str[i] == 0) break;
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if (!is_digit(str[i])) break;
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result *= 10;
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result += (str[i] - '0');
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++i;
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}
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return negative ? -result : result;
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}
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// Convert a 2 digit integer to string
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void int_to_dd(char *str, int value, int width) {
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if (value < 0) {
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*str = '-';
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++str;
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value = -value;
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}
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int divisor = 1;
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for (int i = 0; i < width; ++i) {
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divisor *= 10;
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}
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while (divisor > 1) {
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int digit = value / divisor;
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*str = '0' + digit;
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++str;
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value -= digit * divisor;
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divisor /= 10;
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}
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*str = 0; // Add zero terminator
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} |