#include "str_util.h" #include #include #include #include #ifdef _WIN32 # include # include #endif #include #include "config.h" size_t xstrncpy(char *dest, const char *src, size_t n) { size_t i; for (i = 0; i < n - 1 && src[i] != '\0'; ++i) dest[i] = src[i]; if (n) dest[i] = '\0'; return src[i] == '\0' ? i : n; } size_t xstrjoin(char *dst, const char *const tokens[], char sep, size_t n) { const char *const *remaining = tokens; const char *token = *remaining++; size_t i = 0; while (token) { if (i) { dst[i++] = sep; if (i == n) goto truncated; } size_t w = xstrncpy(dst + i, token, n - i); if (w >= n - i) goto truncated; i += w; token = *remaining++; } return i; truncated: dst[n - 1] = '\0'; return n; } char * strquote(const char *src) { size_t len = strlen(src); char *quoted = SDL_malloc(len + 3); if (!quoted) { return NULL; } memcpy("ed[1], src, len); quoted[0] = '"'; quoted[len + 1] = '"'; quoted[len + 2] = '\0'; return quoted; } bool parse_integer(const char *s, long *out) { char *endptr; if (*s == '\0') { return false; } errno = 0; long value = strtol(s, &endptr, 0); if (errno == ERANGE) { return false; } if (*endptr != '\0') { return false; } *out = value; return true; } bool parse_integer_with_suffix(const char *s, long *out) { char *endptr; if (*s == '\0') { return false; } errno = 0; long value = strtol(s, &endptr, 0); if (errno == ERANGE) { return false; } int mul = 1; if (*endptr != '\0') { if (s == endptr) { return false; } if ((*endptr == 'M' || *endptr == 'm') && endptr[1] == '\0') { mul = 1000000; } else if ((*endptr == 'K' || *endptr == 'k') && endptr[1] == '\0') { mul = 1000; } else { return false; } } if ((value < 0 && LONG_MIN / mul > value) || (value > 0 && LONG_MAX / mul < value)) { return false; } *out = value * mul; return true; } size_t utf8_truncation_index(const char *utf8, size_t max_len) { size_t len = strlen(utf8); if (len <= max_len) { return len; } len = max_len; // see UTF-8 encoding while ((utf8[len] & 0x80) != 0 && (utf8[len] & 0xc0) != 0xc0) { // the next byte is not the start of a new UTF-8 codepoint // so if we would cut there, the character would be truncated len--; } return len; } #ifdef _WIN32 wchar_t * utf8_to_wide_char(const char *utf8) { int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0); if (!len) { return NULL; } wchar_t *wide = SDL_malloc(len * sizeof(wchar_t)); if (!wide) { return NULL; } MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wide, len); return wide; } char * utf8_from_wide_char(const wchar_t *ws) { int len = WideCharToMultiByte(CP_UTF8, 0, ws, -1, NULL, 0, NULL, NULL); if (!len) { return NULL; } char *utf8 = SDL_malloc(len); if (!utf8) { return NULL; } WideCharToMultiByte(CP_UTF8, 0, ws, -1, utf8, len, NULL, NULL); return utf8; } #endif