* Copyright (C) 2004 by Rob Landley <rob@landley.net>
*
* MAINTAINER: Rob Landley <rob@landley.net>
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* See SuS3 sort standard at:
* http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
*/
+//config:config SORT
+//config: bool "sort (7.4 kb)"
+//config: default y
+//config: help
+//config: sort is used to sort lines of text in specified files.
+//config:
+//config:config FEATURE_SORT_BIG
+//config: bool "Full SuSv3 compliant sort (support -ktcbdfiogM)"
+//config: default y
+//config: depends on SORT
+//config: help
+//config: Without this, sort only supports -rusz, and an integer version
+//config: of -n. Selecting this adds sort keys, floating point support, and
+//config: more. This adds a little over 3k to a nonstatic build on x86.
+//config:
+//config: The SuSv3 sort standard is available at:
+//config: http://www.opengroup.org/onlinepubs/007904975/utilities/sort.html
+//config:
+//config:config FEATURE_SORT_OPTIMIZE_MEMORY
+//config: bool "Use less memory (but might be slower)"
+//config: default n # defaults to N since we are size-paranoid tribe
+//config: depends on SORT
+//config: help
+//config: Attempt to use less memory (by storing only one copy
+//config: of duplicated lines, and such). Useful if you work on huge files.
-#include <ctype.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-#include "busybox.h"
+//applet:IF_SORT(APPLET_NOEXEC(sort, sort, BB_DIR_USR_BIN, BB_SUID_DROP, sort))
-static int global_flags;
+//kbuild:lib-$(CONFIG_SORT) += sort.o
-/*
- sort [-m][-o output][-bdfinru][-t char][-k keydef]... [file...]
- sort -c [-bdfinru][-t char][-k keydef][file]
-*/
+//usage:#define sort_trivial_usage
+//usage: "[-nru"
+//usage: IF_FEATURE_SORT_BIG("gMcszbdfiokt] [-o FILE] [-k start[.offset][opts][,end[.offset][opts]] [-t CHAR")
+//usage: "] [FILE]..."
+//usage:#define sort_full_usage "\n\n"
+//usage: "Sort lines of text\n"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "\n -o FILE Output to FILE"
+//usage: "\n -c Check whether input is sorted"
+//usage: "\n -b Ignore leading blanks"
+//usage: "\n -f Ignore case"
+//usage: "\n -i Ignore unprintable characters"
+//usage: "\n -d Dictionary order (blank or alphanumeric only)"
+//usage: )
+//-h, --human-numeric-sort: compare human readable numbers (e.g., 2K 1G)
+//usage: "\n -n Sort numbers"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "\n -g General numerical sort"
+//usage: "\n -M Sort month"
+//usage: "\n -V Sort version"
+//usage: "\n -t CHAR Field separator"
+//usage: "\n -k N[,M] Sort by Nth field"
+//usage: )
+//usage: "\n -r Reverse sort order"
+//usage: "\n -s Stable (don't sort ties alphabetically)"
+//usage: "\n -u Suppress duplicate lines"
+//usage: "\n -z Lines are terminated by NUL, not newline"
+///////: "\n -m Ignored for GNU compatibility"
+///////: "\n -S BUFSZ Ignored for GNU compatibility"
+///////: "\n -T TMPDIR Ignored for GNU compatibility"
+//usage:
+//usage:#define sort_example_usage
+//usage: "$ echo -e \"e\\nf\\nb\\nd\\nc\\na\" | sort\n"
+//usage: "a\n"
+//usage: "b\n"
+//usage: "c\n"
+//usage: "d\n"
+//usage: "e\n"
+//usage: "f\n"
+//usage: IF_FEATURE_SORT_BIG(
+//usage: "$ echo -e \"c 3\\nb 2\\nd 2\" | $SORT -k 2,2n -k 1,1r\n"
+//usage: "d 2\n"
+//usage: "b 2\n"
+//usage: "c 3\n"
+//usage: )
+//usage: ""
+
+#include "libbb.h"
/* These are sort types */
-#define FLAG_n 1 /* Numeric sort */
-#define FLAG_g 2 /* Sort using strtod() */
-#define FLAG_M 4 /* Sort date */
+enum {
+ FLAG_n = 1 << 0, /* Numeric sort */
+ FLAG_g = 1 << 1, /* Sort using strtod() */
+ FLAG_M = 1 << 2, /* Sort date */
+ FLAG_V = 1 << 3, /* Sort version */
/* ucsz apply to root level only, not keys. b at root level implies bb */
-#define FLAG_u 8 /* Unique */
-#define FLAG_c 16 /* Check: no output, exit(!ordered) */
-#define FLAG_s 32 /* Stable sort, no ascii fallback at end */
-#define FLAG_z 64 /* Input is null terminated, not \n */
+ FLAG_u = 1 << 4, /* Unique */
+ FLAG_c = 1 << 5, /* Check: no output, exit(!ordered) */
+ FLAG_s = 1 << 6, /* Stable sort, no ascii fallback at end */
+ FLAG_z = 1 << 7, /* Input and output is NUL terminated, not \n */
/* These can be applied to search keys, the previous four can't */
-#define FLAG_b 128 /* Ignore leading blanks */
-#define FLAG_r 256 /* Reverse */
-#define FLAG_d 512 /* Ignore !(isalnum()|isspace()) */
-#define FLAG_f 1024 /* Force uppercase */
-#define FLAG_i 2048 /* Ignore !isprint() */
-#define FLAG_bb 32768 /* Ignore trailing blanks */
+ FLAG_b = 1 << 8, /* Ignore leading blanks */
+ FLAG_r = 1 << 9, /* Reverse */
+ FLAG_d = 1 << 10, /* Ignore !(isalnum()|isspace()) */
+ FLAG_f = 1 << 11, /* Force uppercase */
+ FLAG_i = 1 << 12, /* Ignore !isprint() */
+ FLAG_m = 1 << 13, /* ignored: merge already sorted files; do not sort */
+ FLAG_S = 1 << 14, /* ignored: -S, --buffer-size=SIZE */
+ FLAG_T = 1 << 15, /* ignored: -T, --temporary-directory=DIR */
+ FLAG_o = 1 << 16,
+ FLAG_k = 1 << 17,
+ FLAG_t = 1 << 18,
+ FLAG_bb = 0x80000000, /* Ignore trailing blanks */
+ FLAG_no_tie_break = 0x40000000,
+};
+static const char sort_opt_str[] ALIGN1 = "^"
+ "ngMVucszbrdfimS:T:o:k:*t:"
+ "\0" "o--o:t--t"/*-t, -o: at most one of each*/;
+/*
+ * OPT_STR must not be string literal, needs to have stable address:
+ * code uses "strchr(OPT_STR,c) - OPT_STR" idiom.
+ */
+#define OPT_STR (sort_opt_str + 1)
-#ifdef CONFIG_FEATURE_SORT_BIG
+#if ENABLE_FEATURE_SORT_BIG
static char key_separator;
-static struct sort_key
-{
- struct sort_key *next_key; /* linked list */
- unsigned short range[4]; /* start word, start char, end word, end char */
- int flags;
+static struct sort_key {
+ struct sort_key *next_key; /* linked list */
+ unsigned range[4]; /* start word, start char, end word, end char */
+ unsigned flags;
} *key_list;
+
+/* This is a NOEXEC applet. Be very careful! */
+
+
static char *get_key(char *str, struct sort_key *key, int flags)
{
- int start=0,end,len,i,j;
+ int start = start; /* for compiler */
+ int end;
+ int len, j;
+ unsigned i;
/* Special case whole string, so we don't have to make a copy */
- if(key->range[0]==1 && !key->range[1] && !key->range[2] && !key->range[3]
- && !(flags&(FLAG_b&FLAG_d&FLAG_f&FLAG_i&FLAG_bb))) return str;
- /* Find start of key on first pass, end on second pass*/
- len=strlen(str);
+ if (key->range[0] == 1 && !key->range[1] && !key->range[2] && !key->range[3]
+ && !(flags & (FLAG_b | FLAG_d | FLAG_f | FLAG_i | FLAG_bb))
+ ) {
+ return str;
+ }
- for(j=0;j<2;j++) {
- if(!key->range[2*j]) end=len;
+ /* Find start of key on first pass, end on second pass */
+ len = strlen(str);
+ for (j = 0; j < 2; j++) {
+ if (!key->range[2*j])
+ end = len;
/* Loop through fields */
else {
- end=0;
- for(i=1;i<key->range[2*j]+j;i++) {
- /* Skip leading blanks or first separator */
- if(str[end]) {
- if(!key_separator && isspace(str[end]))
- while(isspace(str[end])) end++;
- }
- /* Skip body of key */
- for(;str[end];end++) {
- if(key_separator) {
- if(str[end]==key_separator) break;
- } else if(isspace(str[end])) break;
+ unsigned char ch = 0;
+
+ end = 0;
+ for (i = 1; i < key->range[2*j] + j; i++) {
+ if (key_separator) {
+ /* Skip body of key and separator */
+ while ((ch = str[end]) != '\0') {
+ end++;
+ if (ch == key_separator)
+ break;
+ }
+ } else {
+ /* Skip leading blanks */
+ while (isspace(str[end]))
+ end++;
+ /* Skip body of key */
+ while (str[end] != '\0') {
+ if (isspace(str[end]))
+ break;
+ end++;
+ }
}
}
+ /* Remove last delim: "abc:def:" => "abc:def" */
+ if (j && ch) {
+ //if (str[end-1] != key_separator)
+ // bb_error_msg(_and_die("BUG! "
+ // "str[start:%d,end:%d]:'%.*s'",
+ // start, end, (int)(end-start), &str[start]);
+ end--;
+ }
}
- if(!j) start=end;
+ if (!j) start = end;
}
- /* Key with explicit separator starts after separator */
- if(key_separator && str[start]==key_separator) start++;
/* Strip leading whitespace if necessary */
- if(flags&FLAG_b) while(isspace(str[start])) start++;
+ if (flags & FLAG_b)
+ /* not using skip_whitespace() for speed */
+ while (isspace(str[start])) start++;
/* Strip trailing whitespace if necessary */
- if(flags&FLAG_bb) while(end>start && isspace(str[end-1])) end--;
- /* Handle offsets on start and end */
- if(key->range[3]) {
- end+=key->range[3]-1;
- if(end>len) end=len;
+ if (flags & FLAG_bb)
+ while (end > start && isspace(str[end-1])) end--;
+ /* -kSTART,N.ENDCHAR: honor ENDCHAR (1-based) */
+ if (key->range[3]) {
+ end = key->range[3];
+ if (end > len) end = len;
}
- if(key->range[1]) {
- start+=key->range[1]-1;
- if(start>len) start=len;
+ /* -kN.STARTCHAR[,...]: honor STARTCHAR (1-based) */
+ if (key->range[1]) {
+ start += key->range[1] - 1;
+ if (start > len) start = len;
}
/* Make the copy */
- if(end<start) end=start;
- str=bb_xstrndup(str+start,end-start);
+ if (end < start)
+ end = start;
+ str = xstrndup(str+start, end-start);
/* Handle -d */
- if(flags&FLAG_d) {
- for(start=end=0;str[end];end++)
- if(isspace(str[end]) || isalnum(str[end])) str[start++]=str[end];
- str[start]=0;
+ if (flags & FLAG_d) {
+ for (start = end = 0; str[end]; end++)
+ if (isspace(str[end]) || isalnum(str[end]))
+ str[start++] = str[end];
+ str[start] = '\0';
}
/* Handle -i */
- if(flags&FLAG_i) {
- for(start=end=0;str[end];end++)
- if(isprint(str[end])) str[start++]=str[end];
- str[start]=0;
+ if (flags & FLAG_i) {
+ for (start = end = 0; str[end]; end++)
+ if (isprint_asciionly(str[end]))
+ str[start++] = str[end];
+ str[start] = '\0';
}
/* Handle -f */
- if(flags*FLAG_f) for(i=0;str[i];i++) str[i]=toupper(str[i]);
+ if (flags & FLAG_f)
+ for (i = 0; str[i]; i++)
+ str[i] = toupper(str[i]);
return str;
}
static struct sort_key *add_key(void)
{
- struct sort_key **pkey=&key_list;
- while(*pkey) pkey=&((*pkey)->next_key);
- return *pkey=xcalloc(1,sizeof(struct sort_key));
+ struct sort_key **pkey = &key_list;
+ while (*pkey)
+ pkey = &((*pkey)->next_key);
+ return *pkey = xzalloc(sizeof(struct sort_key));
}
-#define GET_LINE(fp) (global_flags&FLAG_z) ? bb_get_chunk_from_file(fp,NULL) \
- : bb_get_chomped_line_from_file(fp)
+#define GET_LINE(fp) \
+ ((option_mask32 & FLAG_z) \
+ ? bb_get_chunk_from_file(fp, NULL) \
+ : xmalloc_fgetline(fp))
#else
-#define GET_LINE(fp) bb_get_chomped_line_from_file(fp)
+#define GET_LINE(fp) xmalloc_fgetline(fp)
#endif
/* Iterate through keys list and perform comparisons */
static int compare_keys(const void *xarg, const void *yarg)
{
- int flags=global_flags,retval=0;
- char *x,*y;
+ int flags = option_mask32, retval = 0;
+ char *x, *y;
-#ifdef CONFIG_FEATURE_SORT_BIG
+#if ENABLE_FEATURE_SORT_BIG
struct sort_key *key;
- for(key=key_list;!retval && key;key=key->next_key) {
- flags=(key->flags) ? key->flags : global_flags;
+ for (key = key_list; !retval && key; key = key->next_key) {
+ flags = key->flags ? key->flags : option_mask32;
/* Chop out and modify key chunks, handling -dfib */
- x=get_key(*(char **)xarg,key,flags);
- y=get_key(*(char **)yarg,key,flags);
+ x = get_key(*(char **)xarg, key, flags);
+ y = get_key(*(char **)yarg, key, flags);
#else
/* This curly bracket serves no purpose but to match the nesting
- level of the for() loop we're not using */
+ * level of the for () loop we're not using */
{
- x=*(char **)xarg;
- y=*(char **)yarg;
+ x = *(char **)xarg;
+ y = *(char **)yarg;
#endif
/* Perform actual comparison */
- switch(flags&7) {
- default:
- bb_error_msg_and_die("Unknown sort type.");
- break;
- /* Ascii sort */
- case 0:
- retval=strcmp(x,y);
- break;
-#ifdef CONFIG_FEATURE_SORT_BIG
- case FLAG_g:
- {
- char *xx,*yy;
- double dx=strtod(x,&xx), dy=strtod(y,&yy);
- /* not numbers < NaN < -infinity < numbers < +infinity) */
- if(x==xx) retval=(y==yy ? 0 : -1);
- else if(y==yy) retval=1;
- /* Check for isnan */
- else if(dx != dx) retval = (dy != dy) ? 0 : -1;
- else if(dy != dy) retval = 1;
- /* Check for infinity. Could underflow, but it avoids libm. */
- else if(1.0/dx == 0.0) {
- if(dx<0) retval=((1.0/dy == 0.0 && dy<0) ? 0 : -1);
- else retval=((1.0/dy == 0.0 && dy>0) ? 0 : 1);
- } else if(1.0/dy == 0.0) retval=dy<0 ? 1 : -1;
- else retval=dx>dy ? 1 : (dx<dy ? -1 : 0);
- break;
- }
- case FLAG_M:
- {
- struct tm thyme;
- int dx;
- char *xx,*yy;
-
- xx=strptime(x,"%b",&thyme);
- dx=thyme.tm_mon;
- yy=strptime(y,"%b",&thyme);
- if(!xx) retval=(!yy ? 0 : -1);
- else if(!yy) retval=1;
- else retval=(dx==thyme.tm_mon ? 0 : dx-thyme.tm_mon);
- break;
- }
- /* Full floating point version of -n */
- case FLAG_n:
- {
- double dx=atof(x),dy=atof(y);
- retval=dx>dy ? 1 : (dx<dy ? -1 : 0);
- break;
- }
+ switch (flags & (FLAG_n | FLAG_g | FLAG_M | FLAG_V)) {
+ default:
+ bb_error_msg_and_die("unknown sort type");
+ break;
+#if defined(HAVE_STRVERSCMP) && HAVE_STRVERSCMP == 1
+ case FLAG_V:
+ retval = strverscmp(x, y);
+ break;
+#endif
+ /* Ascii sort */
+ case 0:
+#if ENABLE_LOCALE_SUPPORT
+ retval = strcoll(x, y);
+#else
+ retval = strcmp(x, y);
+#endif
+ break;
+#if ENABLE_FEATURE_SORT_BIG
+ case FLAG_g: {
+ char *xx, *yy;
+ double dx = strtod(x, &xx);
+ double dy = strtod(y, &yy);
+ /* not numbers < NaN < -infinity < numbers < +infinity) */
+ if (x == xx)
+ retval = (y == yy ? 0 : -1);
+ else if (y == yy)
+ retval = 1;
+ /* Check for isnan */
+ else if (dx != dx)
+ retval = (dy != dy) ? 0 : -1;
+ else if (dy != dy)
+ retval = 1;
+ /* Check for infinity. Could underflow, but it avoids libm. */
+ else if (1.0 / dx == 0.0) {
+ if (dx < 0)
+ retval = (1.0 / dy == 0.0 && dy < 0) ? 0 : -1;
+ else
+ retval = (1.0 / dy == 0.0 && dy > 0) ? 0 : 1;
+ } else if (1.0 / dy == 0.0)
+ retval = (dy < 0) ? 1 : -1;
+ else
+ retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
+ break;
+ }
+ case FLAG_M: {
+ struct tm thyme;
+ int dx;
+ char *xx, *yy;
+
+ xx = strptime(x, "%b", &thyme);
+ dx = thyme.tm_mon;
+ yy = strptime(y, "%b", &thyme);
+ if (!xx)
+ retval = (!yy) ? 0 : -1;
+ else if (!yy)
+ retval = 1;
+ else
+ retval = dx - thyme.tm_mon;
+ break;
+ }
+ /* Full floating point version of -n */
+ case FLAG_n: {
+ double dx = atof(x);
+ double dy = atof(y);
+ retval = (dx > dy) ? 1 : ((dx < dy) ? -1 : 0);
+ break;
}
+ } /* switch */
/* Free key copies. */
- if(x!=*(char **)xarg) free(x);
- if(y!=*(char **)yarg) free(y);
- if(retval) break;
+ if (x != *(char **)xarg) free(x);
+ if (y != *(char **)yarg) free(y);
+ /* if (retval) break; - done by for () anyway */
#else
- /* Integer version of -n for tiny systems */
- case FLAG_n:
- retval=atoi(x)-atoi(y);
- break;
- }
+ /* Integer version of -n for tiny systems */
+ case FLAG_n:
+ retval = atoi(x) - atoi(y);
+ break;
+ } /* switch */
#endif
+ } /* for */
+
+ if (retval == 0) {
+ /* So far lines are "the same" */
+
+ if (option_mask32 & FLAG_s) {
+ /* "Stable sort": later line is "greater than",
+ * IOW: do not allow qsort() to swap equal lines.
+ */
+ uint32_t *p32;
+ uint32_t x32, y32;
+ char *line;
+ unsigned len;
+
+ line = *(char**)xarg;
+ len = (strlen(line) + 4) & (~3u);
+ p32 = (void*)(line + len);
+ x32 = *p32;
+ line = *(char**)yarg;
+ len = (strlen(line) + 4) & (~3u);
+ p32 = (void*)(line + len);
+ y32 = *p32;
+
+ /* If x > y, 1, else -1 */
+ retval = (x32 > y32) * 2 - 1;
+ } else
+ if (!(option_mask32 & FLAG_no_tie_break)) {
+ /* fallback sort */
+ flags = option_mask32;
+ retval = strcmp(*(char **)xarg, *(char **)yarg);
+ }
}
- /* Perform fallback sort if necessary */
- if(!retval && !(global_flags&FLAG_s))
- retval=strcmp(*(char **)xarg, *(char **)yarg);
-//dprintf(2,"reverse=%d\n",flags&FLAG_r);
- return ((flags&FLAG_r)?-1:1)*retval;
+
+ if (flags & FLAG_r)
+ return -retval;
+
+ return retval;
+}
+
+#if ENABLE_FEATURE_SORT_BIG
+static unsigned str2u(char **str)
+{
+ unsigned long lu;
+ if (!isdigit((*str)[0]))
+ bb_error_msg_and_die("bad field specification");
+ lu = strtoul(*str, str, 10);
+ if ((sizeof(long) > sizeof(int) && lu > INT_MAX) || !lu)
+ bb_error_msg_and_die("bad field specification");
+ return lu;
}
+#endif
-int sort_main(int argc, char **argv)
+int sort_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int sort_main(int argc UNUSED_PARAM, char **argv)
{
- FILE *fp,*outfile=NULL;
- int linecount=0,i,flag;
- char *line,**lines=NULL,*optlist="ngMucszbrdfimS:T:o:k:t:";
- int c;
+ char **lines;
+ char *str_ignored, *str_o, *str_t;
+ llist_t *lst_k = NULL;
+ int i;
+ int linecount;
+ unsigned opts;
+#if ENABLE_FEATURE_SORT_OPTIMIZE_MEMORY
+ bool can_drop_dups;
+ size_t prev_len = 0;
+ char *prev_line = (char*) "";
+ /* Postpone optimizing if the input is small, < 16k lines:
+ * even just free()ing duplicate lines takes time.
+ */
+ size_t count_to_optimize_dups = 0x3fff;
+#endif
+
+ xfunc_error_retval = 2;
- bb_default_error_retval = 2;
/* Parse command line options */
- while((c=getopt(argc,argv,optlist))>0) {
- line=strchr(optlist,c);
- if(!line) bb_show_usage();
- switch(*line) {
-#ifdef CONFIG_FEATURE_SORT_BIG
- case 'o':
- if(outfile) bb_error_msg_and_die("Too many -o.");
- outfile=bb_xfopen(optarg,"w");
- break;
- case 't':
- if(key_separator || optarg[1])
- bb_error_msg_and_die("Too many -t.");
- key_separator=*optarg;
+ opts = getopt32(argv,
+ sort_opt_str,
+ &str_ignored, &str_ignored, &str_o, &lst_k, &str_t
+ );
+#if ENABLE_FEATURE_SORT_OPTIMIZE_MEMORY
+ /* Can drop dups only if -u but no "complicating" options,
+ * IOW: if we do a full line compares. Safe options:
+ * -o FILE Output to FILE
+ * -z Lines are terminated by NUL, not newline
+ * -r Reverse sort order
+ * -s Stable (don't sort ties alphabetically)
+ * Not sure about these:
+ * -b Ignore leading blanks
+ * -f Ignore case
+ * -i Ignore unprintable characters
+ * -d Dictionary order (blank or alphanumeric only)
+ * -n Sort numbers
+ * -g General numerical sort
+ * -M Sort month
+ */
+ can_drop_dups = ((opts & ~(FLAG_o|FLAG_z|FLAG_r|FLAG_s)) == FLAG_u);
+ /* Stable sort needs every line to be uniquely allocated,
+ * disable optimization to reuse strings:
+ */
+ if (opts & FLAG_s)
+ count_to_optimize_dups = (size_t)-1L;
+#endif
+ /* global b strips leading and trailing spaces */
+ if (opts & FLAG_b)
+ option_mask32 |= FLAG_bb;
+#if ENABLE_FEATURE_SORT_BIG
+ if (opts & FLAG_t) {
+ if (!str_t[0] || str_t[1])
+ bb_error_msg_and_die("bad -t parameter");
+ key_separator = str_t[0];
+ }
+ /* note: below this point we use option_mask32, not opts,
+ * since that reduces register pressure and makes code smaller */
+
+ /* Parse sort key */
+ while (lst_k) {
+ enum {
+ FLAG_allowed_for_k =
+ FLAG_n | /* Numeric sort */
+ FLAG_g | /* Sort using strtod() */
+ FLAG_M | /* Sort date */
+ FLAG_b | /* Ignore leading blanks */
+ FLAG_r | /* Reverse */
+ FLAG_d | /* Ignore !(isalnum()|isspace()) */
+ FLAG_f | /* Force uppercase */
+ FLAG_i | /* Ignore !isprint() */
+ 0
+ };
+ struct sort_key *key = add_key();
+ char *str_k = llist_pop(&lst_k);
+
+ i = 0; /* i==0 before comma, 1 after (-k3,6) */
+ while (*str_k) {
+ /* Start of range */
+ /* Cannot use bb_strtou - suffix can be a letter */
+ key->range[2*i] = str2u(&str_k);
+ if (*str_k == '.') {
+ str_k++;
+ key->range[2*i+1] = str2u(&str_k);
+ }
+ while (*str_k) {
+ int flag;
+ const char *idx;
+
+ if (*str_k == ',' && !i++) {
+ str_k++;
+ break;
+ } /* no else needed: fall through to syntax error
+ because comma isn't in OPT_STR */
+ idx = strchr(OPT_STR, *str_k);
+ if (!idx)
+ bb_error_msg_and_die("unknown key option");
+ flag = 1 << (idx - OPT_STR);
+ if (flag & ~FLAG_allowed_for_k)
+ bb_error_msg_and_die("unknown sort type");
+ /* b after ',' means strip _trailing_ space */
+ if (i && flag == FLAG_b)
+ flag = FLAG_bb;
+ key->flags |= flag;
+ str_k++;
+ }
+ }
+ }
+#endif
+
+ /* Open input files and read data */
+ argv += optind;
+ if (!*argv)
+ *--argv = (char*)"-";
+ linecount = 0;
+ lines = NULL;
+ do {
+ /* coreutils 6.9 compat: abort on first open error,
+ * do not continue to next file: */
+ FILE *fp = xfopen_stdin(*argv);
+ for (;;) {
+ char *line = GET_LINE(fp);
+ if (!line)
break;
- /* parse sort key */
- case 'k':
- {
- struct sort_key *key=add_key();
- char *temp, *temp2;
-
- temp=optarg;
- for(i=0;*temp;) {
- /* Start of range */
- key->range[2*i]=(unsigned short)strtol(temp,&temp,10);
- if(*temp=='.')
- key->range[(2*i)+1]=(unsigned short)strtol(temp+1,&temp,10);
- for(;*temp;temp++) {
- if(*temp==',' && !i++) {
- temp++;
- break;
- } /* no else needed: fall through to syntax error
- because comma isn't in optlist */
- temp2=strchr(optlist,*temp);
- flag=(1<<(temp2-optlist));
- if(!temp2 || (flag>FLAG_M && flag<FLAG_b))
- bb_error_msg_and_die("Unknown key option.");
- /* b after , means strip _trailing_ space */
- if(i && flag==FLAG_b) flag=FLAG_bb;
- key->flags|=flag;
+
+#if ENABLE_FEATURE_SORT_OPTIMIZE_MEMORY
+ if (count_to_optimize_dups != 0)
+ count_to_optimize_dups--;
+ if (count_to_optimize_dups == 0) {
+ size_t len;
+ char *new_line;
+
+ /* On kernel/linux/arch/ *.[ch] files,
+ * this reduces memory usage by 6%.
+ * yes | head -99999999 | sort
+ * goes down from 1900Mb to 380 Mb.
+ */
+ len = strlen(line);
+ if (len <= prev_len) {
+ new_line = prev_line + (prev_len - len);
+ if (strcmp(line, new_line) == 0) {
+ /* it's a tail of the prev line */
+ if (can_drop_dups && prev_len == len) {
+ /* it's identical to prev line */
+ free(line);
+ continue;
+ }
+ free(line);
+ line = new_line;
+ /* continue using longer prev_line
+ * for future tail tests.
+ */
+ goto skip;
}
}
- break;
+ prev_len = len;
+ prev_line = line;
+ skip: ;
}
+#else
+//TODO: lighter version which only drops total dups if can_drop_dups == true
#endif
- default:
- global_flags|=(1<<(line-optlist));
- /* global b strips leading and trailing spaces */
- if(global_flags&FLAG_b) global_flags|=FLAG_bb;
- break;
- }
- }
- /* Open input files and read data */
- for(i=argv[optind] ? optind : optind-1;argv[i];i++) {
- if(i<optind || (*argv[i]=='-' && !argv[i][1])) fp=stdin;
- else fp=bb_xfopen(argv[i],"r");
- for(;;) {
- line=GET_LINE(fp);
- if(!line) break;
- if(!(linecount&63))
- lines=xrealloc(lines, sizeof(char *)*(linecount+64));
- lines[linecount++]=line;
+ lines = xrealloc_vector(lines, 6, linecount);
+ lines[linecount++] = line;
}
- fclose(fp);
- }
-#ifdef CONFIG_FEATURE_SORT_BIG
- /* if no key, perform alphabetic sort */
- if(!key_list) add_key()->range[0]=1;
- /* handle -c */
- if(global_flags&FLAG_c) {
- int j=(global_flags&FLAG_u) ? -1 : 0;
- for(i=1;i<linecount;i++)
- if(compare_keys(&lines[i-1],&lines[i])>j) {
- fprintf(stderr,"Check line %d\n",i);
- return 1;
+ fclose_if_not_stdin(fp);
+ } while (*++argv);
+
+#if ENABLE_FEATURE_SORT_BIG
+ /* If no key, perform alphabetic sort */
+ if (!key_list)
+ add_key()->range[0] = 1;
+ /* Handle -c */
+ if (option_mask32 & FLAG_c) {
+ int j = (option_mask32 & FLAG_u) ? -1 : 0;
+ for (i = 1; i < linecount; i++) {
+ if (compare_keys(&lines[i-1], &lines[i]) > j) {
+ fprintf(stderr, "Check line %u\n", i);
+ return EXIT_FAILURE;
}
- return 0;
+ }
+ return EXIT_SUCCESS;
}
#endif
+
+ /* For stable sort, store original line position beyond terminating NUL */
+ if (option_mask32 & FLAG_s) {
+ for (i = 0; i < linecount; i++) {
+ uint32_t *p32;
+ char *line;
+ unsigned len;
+
+ line = lines[i];
+ len = (strlen(line) + 4) & (~3u);
+ lines[i] = line = xrealloc(line, len + 4);
+ p32 = (void*)(line + len);
+ *p32 = i;
+ }
+ /*option_mask32 |= FLAG_no_tie_break;*/
+ /* ^^^redundant: if FLAG_s, compare_keys() does no tie break */
+ }
+
/* Perform the actual sort */
- qsort(lines,linecount,sizeof(char *),compare_keys);
- /* handle -u */
- if(global_flags&FLAG_u) {
- for(flag=0,i=1;i<linecount;i++) {
- if(!compare_keys(&lines[flag],&lines[i])) free(lines[i]);
- else lines[++flag]=lines[i];
+ qsort(lines, linecount, sizeof(lines[0]), compare_keys);
+
+ /* Handle -u */
+ if (option_mask32 & FLAG_u) {
+ int j = 0;
+ /* coreutils 6.3 drop lines for which only key is the same
+ * -- disabling last-resort compare, or else compare_keys()
+ * will be the same only for completely identical lines.
+ */
+ option_mask32 |= FLAG_no_tie_break;
+ for (i = 1; i < linecount; i++) {
+ if (compare_keys(&lines[j], &lines[i]) == 0)
+ free(lines[i]);
+ else
+ lines[++j] = lines[i];
}
- if(linecount) linecount=flag+1;
+ if (linecount)
+ linecount = j+1;
}
+
/* Print it */
- if(!outfile) outfile=stdout;
- for(i=0;i<linecount;i++) fprintf(outfile,"%s\n",lines[i]);
- bb_fflush_stdout_and_exit(EXIT_SUCCESS);
+#if ENABLE_FEATURE_SORT_BIG
+ /* Open output file _after_ we read all input ones */
+ if (option_mask32 & FLAG_o)
+ xmove_fd(xopen(str_o, O_WRONLY|O_CREAT|O_TRUNC), STDOUT_FILENO);
+#endif
+ {
+ int ch = (option_mask32 & FLAG_z) ? '\0' : '\n';
+ for (i = 0; i < linecount; i++)
+ printf("%s%c", lines[i], ch);
+ }
+
+ fflush_stdout_and_exit(EXIT_SUCCESS);
}