diff options
| -rw-r--r-- | coreutils/split.c | 139 |
1 files changed, 71 insertions, 68 deletions
diff --git a/coreutils/split.c b/coreutils/split.c index ca54698..07eb97e 100644 --- a/coreutils/split.c +++ b/coreutils/split.c @@ -10,44 +10,43 @@ * http://www.opengroup.org/onlinepubs/009695399/utilities/split.html */ #include "busybox.h" -static unsigned suffix_len = 2; + static const struct suffix_mult split_suffices[] = { -#if ENABLE_FEATURE_SPLIT_FANCY { "b", 512 }, -#endif { "k", 1024 }, { "m", 1024*1024 }, -#if ENABLE_FEATURE_SPLIT_FANCY { "g", 1024*1024*1024 }, -#endif { NULL, 0 } }; /* Increment the suffix part of the filename. - * Returns 0 on success and 1 on error (if we are out of files) + * Returns NULL if we are out of filenames. */ -static bool next_file(char **old) +static char *next_file(char *old, unsigned suffix_len) { - size_t end = strlen(*old); + size_t end = strlen(old); unsigned i = 1; char *curr; do { - curr = *old + end - i; + curr = old + end - i; if (*curr < 'z') { *curr += 1; break; } i++; if (i > suffix_len) { - bb_error_msg("Suffices exhausted"); - return 1; + return NULL; } *curr = 'a'; } while (1); - return 0; + + return old; } +#define read_buffer bb_common_bufsiz1 +enum { READ_BUFFER_SIZE = sizeof(bb_common_bufsiz1) - 1 }; + #define SPLIT_OPT_l (1<<0) #define SPLIT_OPT_b (1<<1) #define SPLIT_OPT_a (1<<2) @@ -55,79 +54,83 @@ static bool next_file(char **old) int split_main(int argc, char **argv); int split_main(int argc, char **argv) { - char *pfx, *buf, *input_file; - unsigned cnt = 1000, opt; - bool ret = EXIT_SUCCESS; - FILE *fp; - char *count_p, *sfx; -//XXX: FIXME opt_complementary = "+2"; /* at most 2 non-option arguments */ + unsigned suffix_len = 2; + char *pfx; + char *count_p; + const char *sfx; + unsigned long cnt = 1000; + unsigned long remaining = 0; + unsigned opt; + int bytes_read, to_write; + char *src; + + opt_complementary = "?2"; opt = getopt32(argc, argv, "l:b:a:", &count_p, &count_p, &sfx); if (opt & SPLIT_OPT_l) - cnt = xatoi(count_p); + cnt = xatoul(count_p); if (opt & SPLIT_OPT_b) cnt = xatoul_sfx(count_p, split_suffices); if (opt & SPLIT_OPT_a) - suffix_len = xatoi(sfx); + suffix_len = xatou(sfx); argv += optind; - if (!*argv) - *--argv = (char*) "-"; - input_file = *argv; - sfx = *++argv; + sfx = "x"; + if (argv[0]) { + if (argv[1]) + sfx = argv[1]; + xmove_fd(xopen(argv[0], O_RDONLY), 0); + } else { + argv[0] = (char *) bb_msg_standard_input; + } - if (sfx && (NAME_MAX < strlen(sfx) + suffix_len)) - bb_error_msg_and_die("Suffix too long"); + if (NAME_MAX < strlen(sfx) + suffix_len) + bb_error_msg_and_die("suffix too long"); { - char *char_p = xzalloc(suffix_len); + char *char_p = xzalloc(suffix_len + 1); memset(char_p, 'a', suffix_len); - pfx = xasprintf("%s%s", sfx ? sfx : "x", char_p); + pfx = xasprintf("%s%s", sfx, char_p); if (ENABLE_FEATURE_CLEAN_UP) free(char_p); } - fp = fopen_or_warn_stdin(input_file); -//XXX:FIXME: unify those two file-handling schemata below (FILE vs fd) ! - if (opt & SPLIT_OPT_b) { - ssize_t i; - ssize_t bytes = 0; - int inp = fileno(fp); + while (1) { + bytes_read = safe_read(0, read_buffer, READ_BUFFER_SIZE); + if (!bytes_read) + break; + if (bytes_read < 0) + bb_perror_msg_and_die("%s", argv[0]); + src = read_buffer; do { - int out = xopen(pfx, O_WRONLY | O_CREAT | O_TRUNC); - lseek(inp, bytes, SEEK_SET); - buf = xzalloc(cnt); - bytes += i = full_read(inp, buf, cnt); - xwrite(out, buf, i); - free(buf); - close(out); - if (next_file(&pfx)) { - ret++; - goto bail; + if (!remaining) { + if (!pfx) + bb_error_msg_and_die("suffices exhausted"); + xmove_fd(xopen(pfx, O_WRONLY | O_CREAT | O_TRUNC), 1); + pfx = next_file(pfx, suffix_len); + remaining = cnt; } - } while (i == cnt); /* if we read less than cnt, then nothing is left */ - } else { /* -l */ - do { - unsigned i = cnt; - int out = xopen(pfx, O_WRONLY | O_CREAT | O_TRUNC); - buf = NULL; - while (i--) { - buf = xmalloc_fgets(fp); - if (buf == NULL) - break; - xwrite(out, buf, strlen(buf)); - free(buf); - }; - close(out); - if (next_file(&pfx)) { - ret++; - goto bail; + + if (opt & SPLIT_OPT_b) { + /* split by bytes */ + to_write = (bytes_read < remaining) ? bytes_read : remaining; + remaining -= to_write; + } else { + /* split by lines */ + /* can be sped up by using _memrchr_ + * and writing many lines at once... */ + char *end = memchr(src, '\n', bytes_read); + if (end) { + --remaining; + to_write = end - src + 1; + } else { + to_write = bytes_read; + } } - } while (buf); - } -bail: - if (ENABLE_FEATURE_CLEAN_UP) { - free(pfx); - fclose_if_not_stdin(fp); + + xwrite(1, src, to_write); + bytes_read -= to_write; + src += to_write; + } while (bytes_read); } - return ret; + return 0; } |