platform.c: provide getline implementation

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/libbb/platform.c b/libbb/platform.c
index 04b8961de..2bf34f5bc 100644
--- a/libbb/platform.c
+++ b/libbb/platform.c
@@ -145,3 +145,32 @@ char* FAST_FUNC stpcpy(char *p, const char *to_add)
         return p;
 }
 #endif
+
+#ifndef HAVE_GETLINE
+ssize_t FAST_FUNC getline(char **lineptr, size_t *n, FILE *stream)
+{
+        int ch;
+        char *line = *lineptr;
+        size_t alloced = *n;
+        size_t len = 0;
+
+        do {
+                ch = fgetc(stream);
+                if (ch == EOF)
+                        break;
+                if (len + 1 >= alloced) {
+                        alloced += alloced/4 + 64;
+                        line = xrealloc(line, alloced);
+                }
+                line[len++] = ch;
+        } while (ch != '\n');
+
+        if (len == 0)
+                return -1;
+
+        line[len] = '\0';
+        *lineptr = line;
+        *n = alloced;
+        return len;
+}
+#endif