move functions around.

[apps/madmutt.git] / lib-lib / str.c

diff --git a/lib-lib/str.c b/lib-lib/str.c
index 7b57305..6537746 100644 (file)
--- a/lib-lib/str.c
+++ b/lib-lib/str.c
@@ -178,3 +178,30 @@ int ascii_strncasecmp (const char *a, const char *b, ssize_t n)
 
     return 0;
 }
+
+ssize_t m_snsubst(char *dst, ssize_t n, const char *fmt, const char *src)
+{
+    ssize_t pos = 0;
+    const char *p;
+
+    p = strchr(fmt, '%');
+    if (!p)
+        return snprintf(dst, n, "%s %s", fmt, src);
+
+    for (;;) {
+        if (p[1] == 's') {
+            pos += m_strncpy(dst + pos, n - pos, fmt, p - fmt);
+            pos += m_strcpy(dst + pos, n - pos, src);
+            fmt = p + 2;
+        } else {
+            pos += m_strncpy(dst + pos, n - pos, fmt, p + 1 - fmt);
+            fmt = p + 1;
+            if (p[1] == '%')
+                p++;
+        }
+
+        p = strchr(fmt, '%');
+        if (!p)
+            return pos + m_strcpy(dst + pos, n - pos, fmt);
+    }
+}