52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
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#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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