From 8336f080cb921a8c64c4cea59463363144e97c1d Mon Sep 17 00:00:00 2001
From: Denis Vlasenko
Date: Sun, 7 Jan 2007 00:21:41 +0000
Subject: diff: small optimizations; do not try to diff non-seekable stream
(currently we don't support that) sort: fixes. testsuites fixed: sort with
non-default leading delim 1 sort with non-default leading delim 2 sort key
doesn't strip leading blanks, disables fallback global sort
---
coreutils/diff.c | 90 +++++++++++++++++++++++++++-----------------------------
coreutils/sort.c | 11 ++-----
2 files changed, 46 insertions(+), 55 deletions(-)
(limited to 'coreutils')
diff --git a/coreutils/diff.c b/coreutils/diff.c
index 923239a..2ce681a 100644
--- a/coreutils/diff.c
+++ b/coreutils/diff.c
@@ -67,8 +67,12 @@
/* XXX: FIXME: the following variables should be static, but gcc currently
* creates a much bigger object if we do this. [which version of gcc? --vda] */
-int context, status;
-char *start, *label[2];
+/* This is the default number of lines of context. */
+int context = 3;
+int status;
+char *start;
+const char *label1;
+const char *label2;
struct stat stb1, stb2;
char **dl;
USE_FEATURE_DIFF_DIR(static int dl_count;)
@@ -276,7 +280,8 @@ static void prepare(int i, FILE * fd, off_t filesize)
sz = 100;
p = xmalloc((sz + 3) * sizeof(struct line));
- for (j = 0; (h = readhash(fd));) {
+ j = 0;
+ while ((h = readhash(fd))) {
if (j == sz) {
sz = sz * 3 / 2;
p = xrealloc(p, (sz + 3) * sizeof(struct line));
@@ -735,14 +740,14 @@ static void dump_unified_vec(FILE * f1, FILE * f2)
static void print_header(const char *file1, const char *file2)
{
- if (label[0] != NULL)
- printf("%s %s\n", "---", label[0]);
+ if (label1)
+ printf("--- %s\n", label1);
else
- printf("%s %s\t%s", "---", file1, ctime(&stb1.st_mtime));
- if (label[1] != NULL)
- printf("%s %s\n", "+++", label[1]);
+ printf("--- %s\t%s", file1, ctime(&stb1.st_mtime));
+ if (label2)
+ printf("+++ %s\n", label2);
else
- printf("%s %s\t%s", "+++", file2, ctime(&stb2.st_mtime));
+ printf("+++ %s\t%s", file2, ctime(&stb2.st_mtime));
}
@@ -771,8 +776,7 @@ static void change(char *file1, FILE * f1, char *file2, FILE * f2, int a,
max_context <<= 1;
context_vec_start = xrealloc(context_vec_start,
- max_context *
- sizeof(struct context_vec));
+ max_context * sizeof(struct context_vec));
context_vec_end = context_vec_start + max_context;
context_vec_ptr = context_vec_start + offset;
}
@@ -894,8 +898,8 @@ static int diffreg(char *ofile1, char *ofile2, int flags)
{
char *file1 = ofile1;
char *file2 = ofile2;
- FILE *f1 = NULL;
- FILE *f2 = NULL;
+ FILE *f1;
+ FILE *f2;
int rval = D_SAME;
int i;
@@ -912,12 +916,18 @@ static int diffreg(char *ofile1, char *ofile2, int flags)
f1 = xfopen(bb_dev_null, "r");
else if (NOT_LONE_DASH(file1))
f1 = xfopen(file1, "r");
-
if (flags & D_EMPTY2)
f2 = xfopen(bb_dev_null, "r");
else if (NOT_LONE_DASH(file2))
f2 = xfopen(file2, "r");
+/* We can't diff non-seekable stream - we use rewind(), fseek().
+ * This can be fixed (volunteers?).
+ * Meanwhile we should check it here by stat'ing input fds,
+ * but I am lazy and check that in main() instead.
+ * Check in main won't catch "diffing fifos buried in subdirectories"
+ * failure scenario - not very likely in real life... */
+
i = files_differ(f1, f2, flags);
if (i == 0)
goto closem;
@@ -1169,48 +1179,32 @@ int diff_main(int argc, char **argv)
char *f1, *f2;
llist_t *L_arg = NULL;
- opt_complementary = "L::";
+ /* exactly 2 params; collect multiple -L <label> */
+ opt_complementary = "=2:L::";
getopt32(argc, argv, "abdiL:NqrsS:tTU:wu"
"p" /* ignored (for compatibility) */,
&L_arg, &start, &U_opt);
-
- if (option_mask32 & FLAG_L) {
- while (L_arg) {
- if (label[0] == NULL)
- label[0] = L_arg->data;
- else if (label[1] == NULL)
- label[1] = L_arg->data;
- else
- bb_show_usage();
-
- L_arg = L_arg->link;
- }
-
- /* If both label[0] and label[1] were set, they need to be swapped. */
- if (label[0] && label[1]) {
- char *tmp;
-
- tmp = label[1];
- label[1] = label[0];
- label[0] = tmp;
+ /*argc -= optind;*/
+ argv += optind;
+ while (L_arg) {
+ if (label1 && label2)
+ bb_show_usage();
+ if (!label1)
+ label1 = L_arg->data;
+ else { /* then label2 is NULL */
+ label2 = label1;
+ label1 = L_arg->data;
}
+ /* we leak L_arg here... */
+ L_arg = L_arg->link;
}
-
- context = 3; /* This is the default number of lines of context. */
- if (option_mask32 & FLAG_U) {
+ if (option_mask32 & FLAG_U)
context = xatou_range(U_opt, 1, INT_MAX);
- }
- argc -= optind;
- argv += optind;
/*
* Do sanity checks, fill in stb1 and stb2 and call the appropriate
* driver routine. Both drivers use the contents of stb1 and stb2.
*/
- if (argc < 2) {
- bb_error_msg("missing filename");
- bb_show_usage();
- }
f1 = argv[0];
f2 = argv[1];
@@ -1239,8 +1233,12 @@ int diff_main(int argc, char **argv)
}
if (S_ISDIR(stb2.st_mode)) {
f2 = concat_path_file(f2, f1);
- xstat(argv[1], &stb2);
+ xstat(f2, &stb2);
}
+/* We can't diff e.g. stdin supplied by a pipe - we use rewind(), fseek().
+ * This can be fixed (volunteers?) */
+ if (!S_ISREG(stb1.st_mode) || !S_ISREG(stb2.st_mode))
+ bb_error_msg_and_die("can't diff non-seekable stream");
print_status(diffreg(f1, f2, 0), f1, f2, NULL);
}
return status;
diff --git a/coreutils/sort.c b/coreutils/sort.c
index c7abc33..29cadf5 100644
--- a/coreutils/sort.c
+++ b/coreutils/sort.c
@@ -75,14 +75,10 @@ static char *get_key(char *str, struct sort_key *key, int flags)
end = 0;
for (i = 1; i < key->range[2*j] + j; i++) {
if (key_separator) {
- /* Skip first separator */
- while (str[end] == key_separator)
- end++;
- /* Skip body of key */
+ /* Skip body of key and separator */
while (str[end]) {
- if (str[end] == key_separator)
+ if (str[end++] == key_separator)
break;
- end++;
}
} else {
/* Skip leading blanks */
@@ -99,9 +95,6 @@ static char *get_key(char *str, struct sort_key *key, int flags)
}
if (!j) start = end;
}
- /* Key with explicit separator starts after separator */
- if (key_separator && str[start] == key_separator)
- start++;
/* Strip leading whitespace if necessary */
//XXX: skip_whitespace()
if (flags & FLAG_b)
--
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