mirror of https://github.com/bjornbytes/lovr.git
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
#include "util.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef _WIN32
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#include <Windows.h>
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#else
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#include <unistd.h>
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#endif
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#define MAX_ERROR_LENGTH 1024
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char lovrErrorMessage[MAX_ERROR_LENGTH];
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jmp_buf* lovrCatch = NULL;
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void lovrThrow(const char* format, ...) {
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va_list args;
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va_start(args, format);
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vsnprintf(lovrErrorMessage, MAX_ERROR_LENGTH, format, args);
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va_end(args);
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if (lovrCatch) {
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longjmp(*lovrCatch, 0);
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} else {
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fprintf(stderr, "Error: %s\n", lovrErrorMessage);
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exit(EXIT_FAILURE);
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}
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}
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void lovrSleep(double seconds) {
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#ifdef _WIN32
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Sleep((unsigned int)(seconds * 1000));
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#else
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usleep((unsigned int)(seconds * 1000000));
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#endif
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}
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void* lovrAlloc(size_t size, void (*destructor)(const Ref* ref)) {
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void* object = malloc(size);
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if (!object) return NULL;
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*((Ref*) object) = (Ref) { destructor, 1 };
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return object;
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}
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void lovrRetain(const Ref* ref) {
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((Ref*) ref)->count++;
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}
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void lovrRelease(const Ref* ref) {
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if (--((Ref*) ref)->count == 0 && ref->free) ref->free(ref);
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}
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// https://github.com/starwing/luautf8
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size_t utf8_decode(const char *s, const char *e, unsigned *pch) {
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unsigned ch;
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if (s >= e) {
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*pch = 0;
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return 0;
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}
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ch = (unsigned char)s[0];
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if (ch < 0xC0) goto fallback;
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if (ch < 0xE0) {
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if (s+1 >= e || (s[1] & 0xC0) != 0x80)
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goto fallback;
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*pch = ((ch & 0x1F) << 6) |
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(s[1] & 0x3F);
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return 2;
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}
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if (ch < 0xF0) {
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if (s+2 >= e || (s[1] & 0xC0) != 0x80
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|| (s[2] & 0xC0) != 0x80)
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goto fallback;
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*pch = ((ch & 0x0F) << 12) |
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((s[1] & 0x3F) << 6) |
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(s[2] & 0x3F);
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return 3;
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}
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{
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int count = 0; /* to count number of continuation bytes */
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unsigned res = 0;
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while ((ch & 0x40) != 0) { /* still have continuation bytes? */
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int cc = (unsigned char)s[++count];
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if ((cc & 0xC0) != 0x80) /* not a continuation byte? */
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goto fallback; /* invalid byte sequence, fallback */
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res = (res << 6) | (cc & 0x3F); /* add lower 6 bits from cont. byte */
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ch <<= 1; /* to test next bit */
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}
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if (count > 5)
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goto fallback; /* invalid byte sequence */
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res |= ((ch & 0x7F) << (count * 5)); /* add first byte */
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*pch = res;
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return count+1;
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}
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fallback:
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*pch = ch;
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return 1;
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}
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