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authorDan McGee <dan@archlinux.org>2008-03-25 21:23:14 -0500
committerDan McGee <dan@archlinux.org>2008-03-27 12:07:26 -0500
commitf8c737d3b6b28373a69d5979a4ba2e31b77baa62 (patch)
treeda339690b576917897b80a0d305c695d17535237
parent1dfd841e40344ff401e0d9e8d61b55cb64b2681f (diff)
Add an archive_fgets() function
This crude function allows reading from an archive on a line-by-line basis similar to the familiar fgets() call on a FILE stream. This is the first step in being able to read DB entries straight from an archive. Signed-off-by: Dan McGee <dan@archlinux.org>
-rw-r--r--lib/libalpm/util.c29
-rw-r--r--lib/libalpm/util.h2
2 files changed, 31 insertions, 0 deletions
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 806f601c..7de5b069 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -673,4 +673,33 @@ int _alpm_test_md5sum(const char *filepath, const char *md5sum)
return(ret);
}
+char *_alpm_archive_fgets(char *line, size_t size, struct archive *a)
+{
+ /* for now, just read one char at a time until we get to a
+ * '\n' char. we can optimize this later with an internal
+ * buffer. */
+ /* leave room for zero terminator */
+ char *last = line + size - 1;
+ char *i;
+
+ for(i = line; i < last; i++) {
+ int ret = archive_read_data(a, i, 1);
+ /* special check for first read- if null, return null,
+ * this indicates EOF */
+ if(i == line && (ret <= 0 || *i == '\0')) {
+ return(NULL);
+ }
+ /* check if read value was null or newline */
+ if(ret <= 0 || *i == '\0' || *i == '\n') {
+ last = i + 1;
+ break;
+ }
+ }
+
+ /* always null terminate the buffer */
+ *last = '\0';
+
+ return(line);
+}
+
/* vim: set ts=2 sw=2 noet: */
diff --git a/lib/libalpm/util.h b/lib/libalpm/util.h
index 6849fa19..0bf122cd 100644
--- a/lib/libalpm/util.h
+++ b/lib/libalpm/util.h
@@ -30,6 +30,7 @@
#include <stdarg.h>
#include <time.h>
#include <sys/stat.h> /* struct stat */
+#include <archive.h> /* struct archive */
#ifdef ENABLE_NLS
#include <libintl.h> /* here so it doesn't need to be included elsewhere */
@@ -66,6 +67,7 @@ char *_alpm_filecache_find(const char *filename);
const char *_alpm_filecache_setup(void);
int _alpm_lstat(const char *path, struct stat *buf);
int _alpm_test_md5sum(const char *filepath, const char *md5sum);
+char *_alpm_archive_fgets(char *line, size_t size, struct archive *a);
#ifndef HAVE_STRVERSCMP
int strverscmp(const char *, const char *);