bc84d094cd
The following changes are focused upon: - Modularity - Doing away with globals - No heap allocations - Better command line interface - Switch from Xlib to XCB - More verbose type definitions - Implement a single-file config by utilising X-macros
51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
#include "util.h"
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#include <stdio.h>
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#define UTF8_MULTIBYTE_BIT BIT(7)
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unsigned int gcd(unsigned int a, unsigned int b) {
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while (b > 0) {
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const unsigned int temp = a % b;
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a = b;
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b = temp;
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}
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return a;
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}
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size_t truncate_utf8_string(char* const buffer, const size_t size,
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const size_t char_limit) {
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size_t char_count = 0;
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size_t i = 0;
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while (char_count < char_limit) {
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char ch = buffer[i];
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if (ch == '\0') {
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break;
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}
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unsigned short skip = 1;
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// Multibyte unicode character
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if ((ch & UTF8_MULTIBYTE_BIT) != 0) {
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// Skip continuation bytes.
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ch <<= 1;
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while ((ch & UTF8_MULTIBYTE_BIT) != 0) {
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ch <<= 1;
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++skip;
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}
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}
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// Avoid buffer overflow.
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if (i + skip >= size) {
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break;
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}
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++char_count;
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i += skip;
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}
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buffer[i] = '\0';
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return i + 1;
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}
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