util.c

Go to the documentation of this file.

 
#include "bit.h"
#include "board.h"
#include "move.h"
#include "util.h"
#include "options.h"
#include "const.h"
 
#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <stdbool.h>
#include <signal.h>
#include <time.h>
 
#if defined(__unix__) || defined(__APPLE__)
 
#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/stat.h>
 
#endif // __unix__ || __APPLE__
 
#if defined(__linux__)
 
#include <sys/sysinfo.h>
#include <sched.h>
 
#endif // __linux__
 
#if defined(_WIN32)
 
#include <winsock2.h>
#include <windows.h>
#include <sys/types.h>
#include <sys/stat.h>
 
#define fileno _fileno
 
#ifndef S_ISREG
#define S_ISREG(x) (x & _S_IFREG)
#endif
#ifndef S_ISFIFO
#define S_ISFIFO(x) (x & _S_IFIFO)
#endif
 
#endif // _WIN32
 
#if defined(__unix__) || defined(__APPLE__)
 
long long real_clock(void)
{
#if _POSIX_TIMERS > 0
        struct timespec tv;
        clock_gettime(CLOCK_MONOTONIC, &tv);
        return tv.tv_sec * 1000ULL + tv.tv_nsec / 1000000ULL;
#else
        struct timeval tv;
        gettimeofday(&tv, NULL);
        return tv.tv_sec * 1000 + tv.tv_usec / 1000;
#endif
}
 
long long cpu_clock(void)
{
        struct rusage u;
        getrusage(RUSAGE_SELF, &u);
        return 1000 * u.ru_utime.tv_sec + u.ru_utime.tv_usec / 1000;
}
 
#elif defined (_WIN32)
 
long long real_clock(void)
{
        return GetTickCount();
}
 
long long cpu_clock(void)
{
        return GetTickCount();
}
 
#endif
 
long long (*time_clock)(void) = real_clock;
 
void time_print(long long t, bool justified, FILE* f)
{
        int d, h, m, s, c;
        int sign;
        const char *space = justified ? "   " : "";
 
 
        if (t < 0) {sign = -1; t = -t;} else sign = +1;
        d = t / 86400000; t -= d * 86400000LL;
        h = t / 3600000; t -= h * 3600000;
        m = t / 60000; t -= m * 60000;
        s = t / 1000;
        c = (t - s * 1000);
 
        if (d) fprintf(f, "%2d:%02d:%02d:%02d.%03d", sign*d, h, m, s, c);
        else if (h) fprintf(f, "%s%2d:%02d:%02d.%03d", space, sign*h, m, s, c);
        else fprintf(f, "%s%s%2d:%02d.%03d", space, space, sign*m, s, c);
}
 
long long time_read(FILE *f)
{
        long long t = 0;
        int n, c;
 
        while (isspace(c = getc(f)));
        ungetc(c, f);
        n = 0; while (isdigit(c = getc(f))) n = n * 10 + (c - '0');
        if (c == ':') {
                t = 60 * n; //  time has the form MM:SS ?
                n = 0; while (isdigit(c = getc(f))) n = n * 10 + (c - '0');
                if (c == ':') {
                        t = 60 * (t + n); //    time has the form HH:MM:SS ?
                        n = 0; while (isdigit(c = getc(f))) n = n * 10 + (c - '0');
                        if (c == ':') {
                                t = 24 * (t + n); //    time has the form D:HH:MM:SS ?
                                n = 0; while (isdigit(c = getc(f))) n = n * 10 + (c - '0');
                        }
                }
        }
 
        t = (t + n) * 1000;
        if (c != '.') return t;
        n = 0; while (isdigit(c = getc(f))) n = n * 10 + (c - '0');
        while (n > 1000) n /= 10;
        t += n;
        return t;
}
 
void time_stamp(FILE *f)
{
        time_t t = time(NULL);
        struct tm *tm;
        tm = localtime(&t);
 
        fprintf(f, "[%4d/%2d/%2d %2d:%2d:%2d] ", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
}
 
 
void relax(int t)
{
#if defined(__unix__) || defined(__APPLE__)
        struct timespec ts;
        ts.tv_sec = t / 1000;
        ts.tv_nsec = (t % 1000) * 1000000;
        nanosleep(&ts, NULL);
#elif defined(_WIN32)
        Sleep(t);
#endif
}
 
char* format_scientific(double v, const char *unit, char *f)
{
        static const char *multiple = "EPTGMk mµnpfa"; //
        int u;
 
        if (fabs(v) < 1e-24) {
                u = 0;
        } else {
                u = floor(log10(fabs(v)) / 3.0);
                if (u > 6) u = 6; else if (u < -6) u = -6;
                v /= pow(10, 3 * u);
        }
        
        if (fabs(v) - floor(fabs(v)) < 0.01) sprintf(f, " %5.1f %c%s", v, multiple[6 - u], unit);
        else if (fabs(v + 0.05) < 10.0) sprintf(f, " %5.3f  %c%s", v, multiple[6 - u], unit);
        else if (fabs(v + 0.5) < 100.0) sprintf(f, " %5.2f  %c%s", v, multiple[6 - u], unit);
        else sprintf(f, " %5.1f  %c%s", v, multiple[6 - u], unit);
 
        return f;
}
 
void print_scientific(double v, const char *unit, FILE *f)
{
        char s[32];
        fprintf(f, "%s", format_scientific(v, unit, s));
}
 
 
char* string_read_line(FILE *f)
{
        int c, i, n;
        char *line;
 
        n = 256; i = 0;
        line = (char*) malloc(n);
        if (line == NULL) fatal_error("Allocation error\n");
 
        while ((c = getc(f)) != EOF && c != '\n') {
                line[i++] = (char) c;
                if (i == n) {
                        n *= 2;
                        line = (char*) realloc(line, n);
                        if (line == NULL) fatal_error("Allocation error\n");
                }
        }
        line[i] = '\0';
 
        if (i == 0 && c == EOF) {
                free(line);
                line = NULL;
        }
 
        return line;
}
 
 
char* string_duplicate(const char *s)
{
        char *d;
 
        if (s) {
                const int n = strlen(s) + 1;
                d = (char*) malloc(n);
                if (d) memcpy(d, s, n);
        } else {
                d = NULL;
        }
 
        return d;
}
 
long long string_to_time(const char *string)
{
        long long t = 0;
        int n = 0;
        double x = 0.0;
 
        if (string) {
                const char *s = parse_skip_spaces(string);
                s = parse_int(s, &n);
                if (*s == ':') {
                        t = 60 * n; //  time has the form MM:SS ?
                        s = parse_int(s + 1, &n);
                        if (*s == ':') {
                                t = 60 * (t + n); //    time has the form HH:MM:SS ?
                                s = parse_int(s + 1, &n);
                                if (*s == ':') {
                                        t = 24 * (t + n); //    time has the form D:HH:MM:SS ?
                                        s = parse_int(s + 1, &n);
                                }
                        }
                }
                if (*s == '.' && isdigit(s[1])) {
                        s = parse_real(s, &x);
                }
                t = (t + n + x) * 1000;
        }
 
        return t;
}
 
void string_to_lowercase(char *s)
{
        if (s) {
                do {
                        *s = tolower(*s);
                } while (*s++);
        }
}
 
void string_to_uppercase(char *s)
{
        if (s) {
                do {
                        *s = toupper(*s);
                } while (*s++);
        }
}
 
int string_to_coordinate(const char *s)
{
        int x = NOMOVE;
 
        if (s && *s) {
                if (tolower(s[0]) == 'p' && s[1] == '@') s += 2;
                else if (s[0] == '@') ++s;
 
                if (tolower(s[0]) == 'p' && (tolower(s[1]) == 'a' || tolower(s[1]) == 's')) x = PASS;
                else if (s[0] == '@' && s[1] == '@') x = PASS; // xboard pass = "@@@@"
                else {
                        int c = tolower(s[0]) - 'a';
                        int r = s[1] - '1';
                        if (0 <= c && c <= 7 && 0 <= r && r <= 7) x = r * 8 + c;
                }
        }
 
        return x;
}
 
char* string_to_word(char *s)
{
        char *w = NULL;
 
        if (s) {
                while (*s && isspace(*s++)) ;
                w = --s;
                while (*s && !isspace(*s++)) ;
                *s = '\0';
        }
        return w;
}
 
bool string_to_boolean(const char *s)
{
        if (strcmp(s, "false") == 0
        ||  strcmp(s, "off") == 0
        ||  strcmp(s, "no") == 0
        ||  strcmp(s, "0") == 0) return false;
 
        if (strcmp(s, "true") == 0
        ||  strcmp(s, "on") == 0
        ||  strcmp(s, "yes") == 0
        ||  strcmp(s, "1") == 0) return true;
 
        errno = EINVAL;
        return false;
}
 
int string_to_int(const char *s, const int default_value)
{
        char *end = (char*) s;
        long n = 0;
 
        if (s) n = strtol(s, &end, 10);
 
        if (end == s) {
                errno = EINVAL;
                n = default_value;
        }
        if (n < INT_MIN) {
                n = INT_MIN;
                errno = ERANGE;
        } else if (n > INT_MAX) {
                n = INT_MAX;
                errno = ERANGE;
        }
 
        return (int) n;
}
 
double string_to_real(const char *s, const double default_value)
{
        char *end = (char*) s;
        double x = 0.0;
 
        if (s) x = strtod(s, &end);
 
        if (end == s) {
                errno = EINVAL;
                x = default_value;
        }
 
        return x;
}
 
/* Parsing functions
 * They differs from string conversion as they convert a
 * string but return the next position from that string.
 */
 
char* parse_skip_spaces(const char *string)
{
        if (string) {
                while (*string && isspace(*string)) ++string;
        }
        return (char*) string;
}
 
char* parse_skip_word(const char *string)
{
        if (string) {
                while (*string && isspace(*string)) ++string;
                while (*string && !isspace(*string)) ++string;
                while (*string && isspace(*string)) ++string;
        }
        return (char*) string;
}
 
char* parse_find(const char *string, const int c)
{
        if (string) {
                while (*string && *string != c) ++string;
        }
        return (char*) string;
}
 
char* parse_word(const char *string, char *word, unsigned int n)
 {
        if (string) {
                string = parse_skip_spaces(string);
                while (*string && !isspace(*string) && n--) *word++ = *string++;
                *word = '\0';
        }
        return (char*) string;
}
 
char* parse_field(const char *string, char *word, unsigned int n, char separator)
 {
        if (string) {
                string = parse_skip_spaces(string);
                while (*string && *string != separator && n--) *word++ = *string++;
                if (*string == separator) ++string;
                *word = '\0';
        }
        return (char*) string;
}
 
char* parse_line(const char *string, char *line, unsigned int n)
{
        const char *s = string;
        if (s) {
                while (*s &&  *s != '\n' && *s != '\r' && n--) *line++ = *s++;
                if (*s == '\0') s = string;
                else {
                        while (*s && *s != '\n' && *s != '\r' ) ++s;
                        while (*s == '\r' || *s == '\n') ++s;
                }
        }
        *line = '\0';
        return (char*) s;
}
 
char* parse_move(const char *string, const Board *board, Move *move)
{
 
        *move = MOVE_INIT;
 
        if (string) {
                char *word = parse_skip_spaces(string);
                int x = string_to_coordinate(word);
                move->x = x;
                move->flipped = flip[x](board->player, board->opponent);
                if ((x == PASS && board_is_pass(board)) || (move->flipped && !board_is_occupied(board, x))) return word + 2;
                else if (board_is_pass(board)) {
                        move->x = PASS;
                        move->flipped = 0;
                } else {
                        move->x = NOMOVE;
                        move->flipped = 0;
                }
        }
        return (char*) string;
}
 
char* parse_game(const char *string, const Board *board_init, Line *line)
{
        const char *next;
        Board board[1];
        Move move[1];
 
        *board = *board_init;
 
        while ((next = parse_move(string, board, move)) != string || move->x == PASS) {
                line_push(line, move->x);
                board_update(board, move);
                string = next;
        }
 
        return (char *) string;
}
 
char* parse_board(const char *string, Board *board, int *player)
{
        if (string) {
                int i;
                const char *s = parse_skip_spaces(string);
 
                board->player = board->opponent = 0;
                for (i = A1; i <= H8; ++i) {
                        if (*s == '\0') return (char*) string;
                        switch (tolower(*s)) {
                        case 'b':
                        case 'x':
                        case '*':
                                board->player |= x_to_bit(i);
                                break;
                        case 'o':
                        case 'w':
                                board->opponent |= x_to_bit(i);
                                break;
                        case '-':
                        case '.':
                                break;
                        default:
                                if (!isspace(*s)) return (char*) string;
                                i--;
                                break;
                        }
                        ++s;
                }
                board_check(board);
 
                for (;*s; ++s) {
                        switch (tolower(*s)) {
                        case 'b':
                        case 'x':
                        case '*':
                                *player = BLACK;
                                return (char*) s + 1;
                        case 'o':
                        case 'w':
                                board_swap_players(board);
                                *player = WHITE;
                                return (char*) s + 1;
                        default:
                                break;
                        }
                }
        }
 
        return (char*) string;
}
 
char* parse_boolean(const char *string, bool *result)
{
        if (string) {
                char word[6];
                bool r;
                errno = 0;
                string = parse_word(parse_skip_spaces(string), word, 6);
                r = string_to_boolean(word);
                if (errno != EINVAL) *result = r;
        }
        return (char*) string;
}
 
char* parse_int(const char *string, int *result)
{
        if (string) {
                char *s = parse_skip_spaces(string);
                char *end = s;
                long long n = 0;
 
                if (s) n = strtol(s, &end, 10);
 
                if (end == s) {
                        errno = EINVAL;
                        n = *result;
                }
                if (n < INT_MIN) {
                        n = INT_MIN;
                        errno = ERANGE;
                } else if (n > INT_MAX) {
                        n = INT_MAX;
                        errno = ERANGE;
                }
 
                *result = n;
 
                return end;
        }
        return (char*) string;
}
 
char* parse_real(const char *string, double *result)
{
        if (string) {
                char *s = parse_skip_spaces(string);
                char *end = s;
                double d = 0;
 
                if (s) d = strtod(s, &end);
 
                if (end == s) {
                        errno = EINVAL;
                        d = *result;
                }
 
                *result = d;
 
                return end;
        }
        return (char*) string;
}
 
char* parse_time(const char *string, long long *t)
{
        int n = 0;
        double x = 0.0;
 
        *t = 0;
        
        if (string) {
                const char *s = parse_skip_spaces(string);
                s = parse_int(s, &n);
                if (*s == ':') {
                        *t = 60 * n; //  time has the form MM:SS ?
                        s = parse_int(s + 1, &n);
                        if (*s == ':') {
                                *t = 60 * (*t + n); //  time has the form HH:MM:SS ?
                                s = parse_int(s + 1, &n);
                                if (*s == ':') {
                                        *t = 24 * (*t + n); //  time has the form D:HH:MM:SS ?
                                        s = parse_int(s + 1, &n);
                                }
                        }
                }
                if (*s == '.' && isdigit(s[1])) {
                        s = parse_real(s, &x);
                        assert(0.0 <= x && x < 1.0);
                }
                *t = (*t + n + x) * 1000;
                if (errno != EINVAL && errno != ERANGE) string = s;
        }
 
        return (char*) string;
}
 
 
char* parse_command(const char *string, char *cmd, char *param, const unsigned int size)
{
        string = parse_word(string, cmd, size);
        string_to_lowercase(cmd);
        if (strcmp(cmd, "set") == 0) {
                string = parse_word(string, cmd, size);
                string_to_lowercase(cmd);
        }
        string = parse_skip_spaces(string);
        if (*string == '=') string = parse_skip_spaces(string + 1);
        string = parse_line(string, param, size);
 
        return (char*) string;
}
 
void path_get_dir(const char *path, char *dir)
{
        const char *c;
 
        for (c = path; *c; ++c) ;
        for (;c >= path && *c != '/'; --c) ;
 
        while (path <= c) *dir++ = *path++;
        *dir = '\0';
}
 
char* file_add_ext(const char *base, const char *ext, char *file)
{
        while (*base) *file++ = *base++;
        while (*ext) *file++ = *ext++;
        *file = '\0';
        return file;
}
 
void thread_create2(Thread *thread, void* (*function)(void*), void *data) // modified for iOS by lavox. 2018/1/16
{
#if defined(__unix__) || (defined(_WIN32) && defined(USE_PTHREAD)) || defined(__APPLE__)
        pthread_create(thread, NULL, function, data);
#elif defined(_WIN32)
        DWORD id;
        *thread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) function, data, 0, &id);
#endif
}
 
void thread_join(Thread thread)
{
#if defined(__unix__) || (defined(_WIN32) && defined(USE_PTHREAD)) || defined(__APPLE__)
        pthread_join(thread, NULL);
#elif defined(_WIN32)
        WaitForSingleObject(thread, INFINITE);
        CloseHandle(thread);
#endif
}
Thread thread_self(void)
{
#if defined(__unix__) || (defined(_WIN32) && defined(USE_PTHREAD)) || defined(__APPLE__)
        return pthread_self();
#elif defined(_WIN32)
        return GetCurrentThread();
#endif
}
 
void thread_set_cpu(Thread thread, int i)
{
#if defined(__linux__) && !defined(ANDROID)
        cpu_set_t cpu;
 
        CPU_ZERO(&cpu);
        CPU_SET(i, &cpu);
        pthread_setaffinity_np(thread, sizeof (cpu_set_t), &cpu);
#elif defined(_WIN32) && !defined(USE_PTHREAD)
        SetThreadIdealProcessor(thread, i);
#else
        (void) thread; (void) i;
#endif
}
 
 
int get_cpu_number(void)
{
        int n = 0;
 
#if defined(ANDROID)
        char file[64];
        FILE *f;
 
        for (n = 0; n < MAX_THREADS; ++n) {
                sprintf(file, "/sys/devices/system/cpu/cpu%d", n);
                f = fopen(file, "r");
                if (f == NULL) {
                        break;
                }
                fclose(f);
        }
 
#elif defined(_SC_NPROCESSORS_ONLN)
 
        n = sysconf(_SC_NPROCESSORS_ONLN);
 
#elif defined(_WIN32)
 
        SYSTEM_INFO info;
 
        GetSystemInfo(&info);
        n = info.dwNumberOfProcessors;
 
#elif defined(__APPLE__) /* should also works on any bsd system */
 
        int mib[4];
        size_t len; 
 
        mib[0] = CTL_HW;
        mib[1] = HW_AVAILCPU;
        sysctl(mib, 2, &n, &len, NULL, 0);
        if (n < 1) {
             mib[1] = HW_NCPU;
             sysctl( mib, 2, &n, &len, NULL, 0 );
        }
 
#endif
 
        if (n < 1) n = 1;
 
        return n;
}
 
unsigned long long random_get(Random *random)
{
        const unsigned long long MASK48 = 0xFFFFFFFFFFFFull;
        const unsigned long long A = 0x5DEECE66Dull;
        const unsigned long long B = 0xBull;
        register unsigned long long r;
 
        random->x = ((A * random->x + B) & MASK48);
        r = random->x >> 16;
        random->x = ((A * random->x + B) & MASK48);
        return (r << 32) | (random->x >> 16);
}
 
void random_seed(Random *random, const unsigned long long seed)
{
        const unsigned long long MASK48 = 0xFFFFFFFFFFFFull;
        random->x = (seed & MASK48);
}