--- /dev/null
+/*
+ * Copyright (c) 2007-2011 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+# include <memory.h>
+# endif
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <ctype.h>
+
+#include "missing.h"
+#include "alloc.h"
+#include "error.h"
+#include "lbuf.h"
+
+void
+lbuf_init(struct lbuf *lbuf, int (*output)(const char *),
+ int indent, const char *continuation, int cols)
+{
+ lbuf->output = output;
+ lbuf->continuation = continuation;
+ lbuf->indent = indent;
+ lbuf->cols = cols;
+ lbuf->len = 0;
+ lbuf->size = 0;
+ lbuf->buf = NULL;
+}
+
+void
+lbuf_destroy(struct lbuf *lbuf)
+{
+ efree(lbuf->buf);
+ lbuf->buf = NULL;
+}
+
+/*
+ * Append strings to the buffer, expanding it as needed.
+ */
+void
+lbuf_append_quoted(struct lbuf *lbuf, const char *set, ...)
+{
+ va_list ap;
+ int len = 0;
+ char *cp, *s;
+
+ va_start(ap, set);
+ while ((s = va_arg(ap, char *)) != NULL) {
+ len += strlen(s);
+ for (cp = s; (cp = strpbrk(cp, set)) != NULL; cp++)
+ len++;
+ }
+ va_end(ap);
+
+ /* Expand buffer as needed. */
+ if (lbuf->len + len >= lbuf->size) {
+ do {
+ lbuf->size += 256;
+ } while (lbuf->len + len >= lbuf->size);
+ lbuf->buf = erealloc(lbuf->buf, lbuf->size);
+ }
+
+ va_start(ap, set);
+ /* Append each string. */
+ while ((s = va_arg(ap, char *)) != NULL) {
+ while ((cp = strpbrk(s, set)) != NULL) {
+ len = (int)(cp - s);
+ memcpy(lbuf->buf + lbuf->len, s, len);
+ lbuf->len += len;
+ lbuf->buf[lbuf->len++] = '\\';
+ lbuf->buf[lbuf->len++] = *cp;
+ s = cp + 1;
+ }
+ if (*s != '\0') {
+ len = strlen(s);
+ memcpy(lbuf->buf + lbuf->len, s, len);
+ lbuf->len += len;
+ }
+ }
+ lbuf->buf[lbuf->len] = '\0';
+ va_end(ap);
+}
+
+/*
+ * Append strings to the buffer, expanding it as needed.
+ */
+void
+lbuf_append(struct lbuf *lbuf, ...)
+{
+ va_list ap;
+ int len = 0;
+ char *s;
+
+ va_start(ap, lbuf);
+ while ((s = va_arg(ap, char *)) != NULL)
+ len += strlen(s);
+ va_end(ap);
+
+ /* Expand buffer as needed. */
+ if (lbuf->len + len >= lbuf->size) {
+ do {
+ lbuf->size += 256;
+ } while (lbuf->len + len >= lbuf->size);
+ lbuf->buf = erealloc(lbuf->buf, lbuf->size);
+ }
+
+ va_start(ap, lbuf);
+ /* Append each string. */
+ while ((s = va_arg(ap, char *)) != NULL) {
+ len = strlen(s);
+ memcpy(lbuf->buf + lbuf->len, s, len);
+ lbuf->len += len;
+ }
+ lbuf->buf[lbuf->len] = '\0';
+ va_end(ap);
+}
+
+static void
+lbuf_println(struct lbuf *lbuf, char *line, int len)
+{
+ char *cp, save;
+ int i, have, contlen;
+
+ contlen = lbuf->continuation ? strlen(lbuf->continuation) : 0;
+
+ /*
+ * Print the buffer, splitting the line as needed on a word
+ * boundary.
+ */
+ cp = line;
+ have = lbuf->cols;
+ while (cp != NULL && *cp != '\0') {
+ char *ep = NULL;
+ int need = len - (int)(cp - line);
+
+ if (need > have) {
+ have -= contlen; /* subtract for continuation char */
+ if ((ep = memrchr(cp, ' ', have)) == NULL)
+ ep = memchr(cp + have, ' ', need - have);
+ if (ep != NULL)
+ need = (int)(ep - cp);
+ }
+ if (cp != line) {
+ /* indent continued lines */
+ /* XXX - build up string instead? */
+ for (i = 0; i < lbuf->indent; i++)
+ lbuf->output(" ");
+ }
+ /* NUL-terminate cp for the output function and restore afterwards */
+ save = cp[need];
+ cp[need] = '\0';
+ lbuf->output(cp);
+ cp[need] = save;
+ cp = ep;
+
+ /*
+ * If there is more to print, reset have, incremement cp past
+ * the whitespace, and print a line continuaton char if needed.
+ */
+ if (cp != NULL) {
+ have = lbuf->cols - lbuf->indent;
+ ep = line + len;
+ while (cp < ep && isblank((unsigned char)*cp)) {
+ cp++;
+ }
+ if (contlen)
+ lbuf->output(lbuf->continuation);
+ }
+ lbuf->output("\n");
+ }
+}
+
+/*
+ * Print the buffer with word wrap based on the tty width.
+ * The lbuf is reset on return.
+ */
+void
+lbuf_print(struct lbuf *lbuf)
+{
+ char *cp, *ep;
+ int len;
+
+ if (lbuf->buf == NULL || lbuf->len == 0)
+ goto done;
+
+ /* For very small widths just give up... */
+ len = lbuf->continuation ? strlen(lbuf->continuation) : 0;
+ if (lbuf->cols <= lbuf->indent + len + 20) {
+ lbuf->buf[lbuf->len] = '\0';
+ lbuf->output(lbuf->buf);
+ goto done;
+ }
+
+ /* Print each line in the buffer */
+ for (cp = lbuf->buf; cp != NULL && *cp != '\0'; ) {
+ if (*cp == '\n') {
+ lbuf->output("\n");
+ cp++;
+ } else {
+ len = lbuf->len - (cp - lbuf->buf);
+ if ((ep = memchr(cp, '\n', len)) != NULL)
+ len = (int)(ep - cp);
+ if (len)
+ lbuf_println(lbuf, cp, len);
+ cp = ep ? ep + 1 : NULL;
+ }
+ }
+
+done:
+ lbuf->len = 0; /* reset the buffer for re-use. */
+}
projects / debian / sudo / blobdiff