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-rw-r--r--braces.c113
1 files changed, 85 insertions, 28 deletions
diff --git a/braces.c b/braces.c
index 2537397..45abe45 100644
--- a/braces.c
+++ b/braces.c
@@ -1,22 +1,22 @@
/* braces.c -- code for doing word expansion in curly braces. */
-/* Copyright (C) 1987-2003 Free Software Foundation, Inc.
+/* Copyright (C) 1987-2009 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
- Bash is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bash is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- License for more details.
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bash; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
/* Stuff in curly braces gets expanded before all other shell expansions. */
@@ -45,6 +45,8 @@
#define BRACE_SEQ_SPECIFIER ".."
+extern int asprintf __P((char **, const char *, ...)) __attribute__((__format__ (printf, 2, 3)));
+
/* Basic idea:
Segregate the text into 3 sections: preamble (stuff before an open brace),
@@ -55,13 +57,13 @@
*/
/* The character which is used to separate arguments. */
-int brace_arg_separator = ',';
+static const int brace_arg_separator = ',';
#if defined (__P)
static int brace_gobbler __P((char *, size_t, int *, int));
static char **expand_amble __P((char *, size_t, int));
static char **expand_seqterm __P((char *, size_t));
-static char **mkseq __P((int, int, int, int));
+static char **mkseq __P((int, int, int, int, int));
static char **array_concat __P((char **, char **));
#else
static int brace_gobbler ();
@@ -301,10 +303,11 @@ expand_amble (text, tlen, flags)
#define ST_BAD 0
#define ST_INT 1
#define ST_CHAR 2
+#define ST_ZINT 3
static char **
-mkseq (start, end, incr, type)
- int start, end, incr, type;
+mkseq (start, end, incr, type, width)
+ int start, end, incr, type, width;
{
int n, i;
char **result, *t;
@@ -330,6 +333,12 @@ mkseq (start, end, incr, type)
#endif
if (type == ST_INT)
result[i++] = itos (n);
+ else if (type == ST_ZINT)
+ {
+ int len;
+ len = asprintf (&t, "%0*d", width, n);
+ result[i++] = t;
+ }
else
{
t = (char *)xmalloc (2);
@@ -337,9 +346,9 @@ mkseq (start, end, incr, type)
t[1] = '\0';
result[i++] = t;
}
- if (n == end)
- break;
n += incr;
+ if ((incr < 0 && n < end) || (incr > 0 && n > end))
+ break;
}
while (1);
@@ -353,17 +362,17 @@ expand_seqterm (text, tlen)
size_t tlen;
{
char *t, *lhs, *rhs;
- int i, lhs_t, rhs_t, lhs_v, rhs_v;
+ int i, lhs_t, rhs_t, lhs_v, rhs_v, incr, lhs_l, rhs_l, width;
intmax_t tl, tr;
- char **result;
+ char **result, *ep, *oep;
t = strstr (text, BRACE_SEQ_SPECIFIER);
if (t == 0)
return ((char **)NULL);
- i = t - text; /* index of start of BRACE_SEQ_SPECIFIER */
- lhs = substring (text, 0, i);
- rhs = substring (text, i + sizeof(BRACE_SEQ_SPECIFIER) - 1, tlen);
+ lhs_l = t - text; /* index of start of BRACE_SEQ_SPECIFIER */
+ lhs = substring (text, 0, lhs_l);
+ rhs = substring (text, lhs_l + sizeof(BRACE_SEQ_SPECIFIER) - 1, tlen);
if (lhs[0] == 0 || rhs[0] == 0)
{
@@ -376,8 +385,38 @@ expand_seqterm (text, tlen)
sides have to match. */
lhs_t = (legal_number (lhs, &tl)) ? ST_INT :
((ISALPHA (lhs[0]) && lhs[1] == 0) ? ST_CHAR : ST_BAD);
- rhs_t = (legal_number (rhs, &tr)) ? ST_INT :
- ((ISALPHA (rhs[0]) && rhs[1] == 0) ? ST_CHAR : ST_BAD);
+
+ /* Decide on rhs and whether or not it looks like the user specified
+ an increment */
+ ep = 0;
+ if (ISDIGIT (rhs[0]) || ((rhs[0] == '+' || rhs[0] == '-') && ISDIGIT (rhs[1])))
+ {
+ rhs_t = ST_INT;
+ tr = strtoimax (rhs, &ep, 10);
+ if (ep && *ep != 0 && *ep != '.')
+ rhs_t = ST_BAD; /* invalid */
+ }
+ else if (ISALPHA (rhs[0]) && (rhs[1] == 0 || rhs[1] == '.'))
+ {
+ rhs_t = ST_CHAR;
+ ep = rhs + 1;
+ }
+ else
+ {
+ rhs_t = ST_BAD;
+ ep = 0;
+ }
+
+ incr = 1;
+ if (rhs_t != ST_BAD)
+ {
+ oep = ep;
+ if (ep && *ep == '.' && ep[1] == '.' && ep[2])
+ incr = strtoimax (ep + 2, &ep, 10);
+ if (*ep != 0)
+ rhs_t = ST_BAD; /* invalid incr */
+ tlen -= ep - oep;
+ }
if (lhs_t != rhs_t || lhs_t == ST_BAD || rhs_t == ST_BAD)
{
@@ -394,14 +433,32 @@ expand_seqterm (text, tlen)
{
lhs_v = (unsigned char)lhs[0];
rhs_v = (unsigned char)rhs[0];
+ width = 1;
}
else
{
lhs_v = tl; /* integer truncation */
rhs_v = tr;
+
+ /* Decide whether or not the terms need zero-padding */
+ rhs_l = tlen - lhs_l - sizeof (BRACE_SEQ_SPECIFIER) + 1;
+ width = 0;
+ if (lhs_l > 1 && lhs[0] == '0')
+ width = lhs_l, lhs_t = ST_ZINT;
+ if (lhs_l > 2 && lhs[0] == '-' && lhs[1] == '0')
+ width = lhs_l, lhs_t = ST_ZINT;
+ if (rhs_l > 1 && rhs[0] == '0' && width < rhs_l)
+ width = rhs_l, lhs_t = ST_ZINT;
+ if (rhs_l > 2 && rhs[0] == '-' && rhs[1] == '0' && width < rhs_l)
+ width = rhs_l, lhs_t = ST_ZINT;
+
+ if (width < lhs_l && lhs_t == ST_ZINT)
+ width = lhs_l;
+ if (width < rhs_l && lhs_t == ST_ZINT)
+ width = rhs_l;
}
- result = mkseq (lhs_v, rhs_v, 1, lhs_t);
+ result = mkseq (lhs_v, rhs_v, incr, lhs_t, width);
free (lhs);
free (rhs);
@@ -486,11 +543,11 @@ brace_gobbler (text, tlen, indx, satisfy)
}
#if defined (SHELL)
- /* Pass new-style command substitutions through unchanged. */
- if (c == '$' && text[i+1] == '(') /* ) */
+ /* Pass new-style command and process substitutions through unchanged. */
+ if ((c == '$' || c == '<' || c == '>') && text[i+1] == '(') /* ) */
{
si = i + 2;
- t = extract_command_subst (text, &si);
+ t = extract_command_subst (text, &si, 0);
i = si;
free (t);
i++;
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 06:36:01 +0000