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-rw-r--r--toys/posix/paste.c173
1 files changed, 103 insertions, 70 deletions
diff --git a/toys/posix/paste.c b/toys/posix/paste.c
index 5ab3448d..508b3518 100644
--- a/toys/posix/paste.c
+++ b/toys/posix/paste.c
@@ -1,99 +1,132 @@
-/* paste.c - Replace newlines
+/* paste.c - Merge corresponding lines
*
* Copyright 2012 Felix Janda <felix.janda@posteo.de>
*
* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/paste.html
*
-USE_PASTE(NEWTOY(paste, "d:s", TOYFLAG_BIN))
+ * Deviations from posix: the FILE argument isn't mandatory, none == '-'
+
+USE_PASTE(NEWTOY(paste, "d:s", TOYFLAG_BIN|TOYFLAG_LOCALE))
config PASTE
bool "paste"
default y
help
- usage: paste [-s] [-d list] [file...]
-
- Replace newlines in files.
+ usage: paste [-s] [-d DELIMITERS] [FILE...]
- -d list list of delimiters to separate lines
- -s process files sequentially instead of in parallel
+ Merge corresponding lines from each input file.
- By default print corresponding lines separated by <tab>.
+ -d list of delimiter characters to separate fields with (default is \t)
+ -s sequential mode: turn each input file into one line of output
*/
+
#define FOR_paste
#include "toys.h"
GLOBALS(
- char *delim;
+ char *d;
+
+ int files;
)
-void paste_main(void)
+// \0 is weird, and -d "" is also weird.
+
+static void paste_files(void)
{
- char *p, *buf = toybuf, **args = toys.optargs;
- size_t ndelim = 0;
- int i, j, c;
-
- // Process delimiter list
- // TODO: Handle multibyte characters
- if (!(toys.optflags & FLAG_d)) TT.delim = "\t";
- for (p = TT.delim; *p; p++, buf++, ndelim++) {
- if (*p == '\\') {
- p++;
- if (-1 == (i = stridx("nt\\0", *p)))
- error_exit("bad delimiter: \\%c", *p);
- *buf = "\n\t\\\0"[i];
- } else *buf = *p;
- }
- *buf = 0;
-
- if (toys.optflags & FLAG_s) { // Sequential
- FILE *f;
-
- for (; *args; args++) {
- if ((*args)[0] == '-' && !(*args)[1]) f = stdin;
- else if (!(f = fopen(*args, "r"))) perror_exit_raw(*args);
- for (i = 0, c = 0; c != EOF;) {
- switch(c = getc(f)) {
- case '\n':
- putchar(toybuf[i++ % ndelim]);
- case EOF:
- break;
- default:
- putchar(c);
- }
+ FILE **fps = (void *)toybuf;
+ char *dpos, *dstr, *buf, c;
+ int i, any, dcount, dlen, len, seq = toys.optflags&FLAG_s;
+
+ // Loop through lines until no input left
+ for (;;) {
+
+ // Start of each line/file resets delimiter cycle
+ dpos = TT.d;
+ mbtowc(0, 0, 0);
+
+ for (i = any = dcount = dlen = 0; seq || i<TT.files; i++) {
+ size_t blen;
+ wchar_t wc;
+ FILE *ff = seq ? *fps : fps[i];
+
+ // Read and output line, preserving embedded NUL bytes.
+
+ buf = 0;
+ len = 0;
+ if (!ff || 0>=(len = getline(&buf, &blen, ff))) {
+ if (ff && ff!=stdin) fclose(ff);
+ if (seq) return;
+ fps[i] = 0;
+ if (!any) continue;
}
- if (f != stdin) fclose(f);
- putchar('\n');
- }
- } else { // Parallel
- // Need to be careful not to print an extra line at the end
- FILE **files;
- int anyopen = 1;
-
- files = (FILE**)(buf + 1);
- for (; *args; args++, files++) {
- if ((*args)[0] == '-' && !(*args)[1]) *files = stdin;
- else if (!(*files = fopen(*args, "r"))) perror_exit_raw(*args);
- }
- while (anyopen) {
- anyopen = 0;
- for (i = 0; i < toys.optc; i++) {
- FILE **f = (FILE**)(buf + 1) + i;
-
- if (*f) for (;;) {
- c = getc(*f);
- if (c != EOF) {
- if (!anyopen++) for (j = 0; j < i; j++) putchar(toybuf[j % ndelim]);
- if (c != '\n') putchar(c);
- else break;
- }
+ dcount = any ? 1 : i;
+ any = 1;
+
+ // Output delimiters as necessary: not at beginning/end of line,
+ // catch up if first few files had no input but a later one did.
+ // Entire line with no input means no output.
+
+ while (dcount) {
+
+ // Find next delimiter, which can be "", \n, or UTF8 w/combining chars
+ dstr = dpos;
+ dlen = 0;
+ dcount--;
+
+ if (!*TT.d) {;}
+ else if (*dpos == '\\') {
+ if (*++dpos=='0') dpos++;
else {
- if (*f != stdin) fclose(*f);
- *f = 0;
+ dlen = 1;
+ if ((c = unescape(*dpos))) {
+ dstr = &c;
+ dpos++;
+ }
+ }
+ dpos++;
+ } else {
+ while (0<(dlen = mbtowc(&wc, dpos, 99))) {
+ dpos += dlen;
+ if (!(dlen = wcwidth(wc))) continue;
+ if (dlen<0) dpos = dstr+1;
break;
}
+ dlen = dpos-dstr;
}
- if (anyopen) putchar((i + 1 == toys.optc) ? toybuf[i % ndelim] : '\n');
+ if (!*dpos) dpos = TT.d;
+
+ if (dlen) fwrite(dstr, dlen, 1, stdout);
+ }
+
+ if (0<len) {
+ fwrite(buf, len-(buf[len-1]=='\n'), 1, stdout);
+ free(buf);
}
}
+
+ // Only need a newline if we output something
+ if (any) xputc('\n');
+ else break;
}
}
+
+static void do_paste(int fd, char *name)
+{
+ FILE **fps = (void *)toybuf;
+
+ if (!(fps[TT.files++] = (fd ? fdopen(fd, "r") : stdin))) perror_exit(0);
+ if (TT.files >= sizeof(toybuf)/sizeof(FILE *)) perror_exit("tilt");
+ if (toys.optflags&FLAG_s) {
+ paste_files();
+ xputc('\n');
+ TT.files = 0;
+ }
+}
+
+void paste_main(void)
+{
+ if (!(toys.optflags&FLAG_d)) TT.d = "\t";
+
+ loopfiles_rw(toys.optargs, O_RDONLY, 0, do_paste);
+ if (!(toys.optflags&FLAG_s)) paste_files();
+}