[hackers] [sbase] grep: Reuse allocated buffers || sin

[git]

commit fb85f99c0a5bb330178d29d582aedc07b1a0f5db
Author: sin <s...@2f30.org>
Date:   Tue Dec 16 20:20:41 2014 +0000

    grep: Reuse allocated buffers

diff --git a/grep.c b/grep.c
index 86b8ca5..1376940 100644
--- a/grep.c
+++ b/grep.c
@@ -177,15 +177,15 @@ addpattern(const char *pattern)
 static void
 addpatternfile(FILE *fp)
 {
-       char *buf = NULL;
-       size_t len = 0, size = 0;
+       static char *buf = NULL;
+       static size_t size = 0;
+       size_t len = 0;
 
        while ((len = getline(&buf, &size, fp)) != -1) {
                if (len && buf[len - 1] == '\n')
                        buf[len - 1] = '\0';
                addpattern(buf);
        }
-       free(buf);
        if (ferror(fp))
                enprintf(Error, "read error:");
 }
@@ -193,8 +193,9 @@ addpatternfile(FILE *fp)
 static int
 grep(FILE *fp, const char *str)
 {
-       char *buf = NULL;
-       size_t len = 0, size = 0;
+       static char *buf = NULL;
+       static size_t size = 0;
+       size_t len = 0;
        long c = 0, n;
        struct pattern *pnode;
        int match = NoMatch;
@@ -250,6 +251,5 @@ end:
                weprintf("%s: read error:", str);
                match = Error;
        }
-       free(buf);
        return match;
 }