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Diffstat (limited to 'i/pc104/initrd/conf/busybox/coreutils/fold.c')
-rw-r--r--i/pc104/initrd/conf/busybox/coreutils/fold.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/coreutils/fold.c b/i/pc104/initrd/conf/busybox/coreutils/fold.c
new file mode 100644
index 0000000..4ce52cf
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/coreutils/fold.c
@@ -0,0 +1,155 @@
+/* vi: set sw=4 ts=4: */
+/* fold -- wrap each input line to fit in specified width.
+
+ Written by David MacKenzie, djm@gnu.ai.mit.edu.
+ Copyright (C) 91, 1995-2002 Free Software Foundation, Inc.
+
+ Modified for busybox based on coreutils v 5.0
+ Copyright (C) 2003 Glenn McGrath <bug1@iinet.net.au>
+
+ Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+*/
+
+#include "busybox.h"
+
+static unsigned long flags;
+#define FLAG_COUNT_BYTES 1
+#define FLAG_BREAK_SPACES 2
+#define FLAG_WIDTH 4
+
+/* Assuming the current column is COLUMN, return the column that
+ printing C will move the cursor to.
+ The first column is 0. */
+
+static int adjust_column(int column, char c)
+{
+ if (!(flags & FLAG_COUNT_BYTES)) {
+ if (c == '\b') {
+ if (column > 0)
+ column--;
+ } else if (c == '\r')
+ column = 0;
+ else if (c == '\t')
+ column = column + 8 - column % 8;
+ else /* if (isprint (c)) */
+ column++;
+ } else
+ column++;
+ return column;
+}
+
+int fold_main(int argc, char **argv);
+int fold_main(int argc, char **argv)
+{
+ char *w_opt;
+ int width = 80;
+ int i;
+ int errs = 0;
+
+ if (ENABLE_INCLUDE_SUSv2) {
+ /* Turn any numeric options into -w options. */
+ for (i = 1; i < argc; i++) {
+ char const *a = argv[i];
+
+ if (*a++ == '-') {
+ if (*a == '-' && !a[1])
+ break;
+ if (isdigit(*a)) {
+ argv[i] = xasprintf("-w%s", a);
+ }
+ }
+ }
+ }
+
+ flags = getopt32(argc, argv, "bsw:", &w_opt);
+ if (flags & FLAG_WIDTH)
+ width = xatoul_range(w_opt, 1, 10000);
+
+ argv += optind;
+ if (!*argv) {
+ *--argv = (char*)"-";
+ }
+
+ do {
+ FILE *istream = fopen_or_warn_stdin(*argv);
+ int c;
+ int column = 0; /* Screen column where next char will go. */
+ int offset_out = 0; /* Index in `line_out' for next char. */
+ static char *line_out = NULL;
+ static int allocated_out = 0;
+
+ if (istream == NULL) {
+ errs |= EXIT_FAILURE;
+ continue;
+ }
+
+ while ((c = getc(istream)) != EOF) {
+ if (offset_out + 1 >= allocated_out) {
+ allocated_out += 1024;
+ line_out = xrealloc(line_out, allocated_out);
+ }
+
+ if (c == '\n') {
+ line_out[offset_out++] = c;
+ fwrite(line_out, sizeof(char), (size_t) offset_out, stdout);
+ column = offset_out = 0;
+ continue;
+ }
+
+rescan:
+ column = adjust_column(column, c);
+
+ if (column > width) {
+ /* This character would make the line too long.
+ Print the line plus a newline, and make this character
+ start the next line. */
+ if (flags & FLAG_BREAK_SPACES) {
+ /* Look for the last blank. */
+ int logical_end;
+
+ for (logical_end = offset_out - 1; logical_end >= 0; logical_end--) {
+ if (isblank(line_out[logical_end])) {
+ break;
+ }
+ }
+ if (logical_end >= 0) {
+ /* Found a blank. Don't output the part after it. */
+ logical_end++;
+ fwrite(line_out, sizeof(char), (size_t) logical_end, stdout);
+ putchar('\n');
+ /* Move the remainder to the beginning of the next line.
+ The areas being copied here might overlap. */
+ memmove(line_out, line_out + logical_end, offset_out - logical_end);
+ offset_out -= logical_end;
+ for (column = i = 0; i < offset_out; i++) {
+ column = adjust_column(column, line_out[i]);
+ }
+ goto rescan;
+ }
+ } else {
+ if (offset_out == 0) {
+ line_out[offset_out++] = c;
+ continue;
+ }
+ }
+ line_out[offset_out++] = '\n';
+ fwrite(line_out, sizeof(char), (size_t) offset_out, stdout);
+ column = offset_out = 0;
+ goto rescan;
+ }
+
+ line_out[offset_out++] = c;
+ }
+
+ if (offset_out) {
+ fwrite(line_out, sizeof(char), (size_t) offset_out, stdout);
+ }
+
+ if (ferror(istream) || fclose_if_not_stdin(istream)) {
+ bb_perror_msg("%s", *argv); /* Avoid multibyte problems. */
+ errs |= EXIT_FAILURE;
+ }
+ } while (*++argv);
+
+ fflush_stdout_and_exit(errs);
+}