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| #include "base.h" |
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| #define CHECK_STR(cond, ret) \ |
| if (!haystack || offset < 1 || strlen(haystack) < offset || cond) { \ |
| errno = EINVAL; \ |
| return ret; \ |
| } |
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| #define TRUN_STR() { \ |
| ch = haystack[offset]; \ |
| haystack[offset] = 0; \ |
| } |
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| #define JOIN_STR() haystack[offset] = ch; |
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| int32_t readnonblock(int32_t fd, void *buf, size_t count) |
| { |
| int32_t res, offset = 0; |
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| while (true) { |
| if ((res = read(fd, buf + offset, count)) == count) { |
| return offset + res; |
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| } else if (res == CERR && errno == EAGAIN) { |
| return offset; |
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| } else { |
| if (res != CERR) { |
| offset += res; |
| count -= res; |
| } |
| } |
| } |
| } |
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| int32_t writen(int32_t fd, void *buf, size_t count) |
| { |
| int32_t res, offset = 0; |
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| while (true) { |
| if ((res = write(fd, buf + offset, count)) == count) { |
| return offset + res; |
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| } else if (res >= 0) { |
| offset += res; |
| count -= res; |
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| } else { |
| return offset; |
| } |
| } |
| } |
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| char *strnstr(char *haystack, const char *needle, int32_t offset) |
| { |
| char *str, ch; |
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| CHECK_STR(!needle, NULL); |
| TRUN_STR(); |
| str = strstr(haystack, needle); |
| JOIN_STR(); |
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| return str; |
| } |
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| char *strnchr(char *haystack, char c, int32_t offset, bool is_first) |
| { |
| char *str, ch; |
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| CHECK_STR(false, NULL); |
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| if (haystack[offset] == c) |
| return &haystack[offset]; |
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| TRUN_STR(); |
| str = (is_first) ? strchr(haystack, c) : strrchr(haystack, c); |
| JOIN_STR(); |
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| return str; |
| } |
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| int32_t atoin(char *haystack, int32_t offset) |
| { |
| char ch; |
| int32_t result; |
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| CHECK_STR(false, CERR); |
| TRUN_STR(); |
| result = atoi(haystack); |
| JOIN_STR(); |
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| return result; |
| } |
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| int64_t trandom(int32_t mod) |
| { |
| srand48(clock()); |
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| return (lrand48() % mod); |
| } |
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| int64_t clockrandom(int32_t mod) |
| { |
| return clock() % mod; |
| } |
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