initial commit

1 files changed, 117 insertions, 0 deletions

diff --git a/strv.c b/strv.c
new file mode 100644
index 0000000000..ecad6d5980
--- /dev/null
+++ b/strv.c
@@ -0,0 +1,117 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "util.h"
+#include "strv.h"
+
+char *strv_find(char **l, const char *name) {
+        assert(l);
+        assert(name);
+
+        for (; *l; l++)
+                if (streq(*l, name))
+                        return *l;
+
+        return NULL;
+}
+
+void strv_free(char **l) {
+        char **k;
+
+        if (!l)
+                return;
+
+        for (k = l; *k; k++)
+                free(*k);
+
+        free(l);
+}
+
+char **strv_copy(char **l) {
+        char **r, **k;
+
+        if (!(r = new(char*, strv_length(l)+1)))
+                return NULL;
+
+        for (k = r; *l; k++, l++)
+                if (!(*k = strdup(*l)))
+                        goto fail;
+
+        *k = NULL;
+        return r;
+
+fail:
+        for (k--, l--; k >= r; k--, l--)
+                free(*k);
+
+        return NULL;
+}
+
+unsigned strv_length(char **l) {
+        unsigned n = 0;
+
+        if (!l)
+                return 0;
+
+        for (; *l; l++)
+                n++;
+
+        return n;
+}
+
+char **strv_new(const char *x, ...) {
+        const char *s;
+        char **a;
+        unsigned n = 0, i = 0;
+        va_list ap;
+
+        if (x) {
+                n = 1;
+
+                va_start(ap, x);
+
+                while (va_arg(ap, const char*))
+                        n++;
+
+                va_end(ap);
+        }
+
+        if (!(a = new(char*, n+1)))
+                return NULL;
+
+        if (x) {
+                if (!(a[i] = strdup(x))) {
+                        free(a);
+                        return NULL;
+                }
+
+                i++;
+
+                va_start(ap, x);
+
+                while ((s = va_arg(ap, const char*))) {
+                        if (!(a[i] = strdup(s)))
+                                goto fail;
+
+                        i++;
+                }
+
+                va_end(ap);
+        }
+
+        a[i] = NULL;
+        return a;
+
+fail:
+
+        for (; i > 0; i--)
+                if (a[i-1])
+                        free(a[i-1]);
+
+        free(a);
+        return NULL;
+}