Add a version of read_str which reads to a buffer instead of returning a new one.

packages/base/any/onlp/src/onlplib/module/inc/onlplib/file.h

@@ -98,6 +98,30 @@ int onlp_file_vread_str(char** str, const char* fmt, va_list vargs);
  */
 int onlp_file_read_str(char** str, const char* fmt, ...);
 
+/**
+ * @brief Read and place the contents of the given file into the
+ * given buffer.
+ * @param dst Destination buffer
+ * @param size Max size
+ * @param fmt The filename format string
+ * @param vargs The filename format args.
+ * @note The contents of the file are assume to be a string.
+ *       Trailing newlines are removed.
+ */
+int onlp_file_vread_str_dst(char* dst, int size, const char* fmt, va_list vargs);
+
+/**
+ * @brief Read and place the contents of the given file into the
+ * given buffer.
+ * @param dst Destination buffer
+ * @param size Max size
+ * @param fmt The filename format string
+ * @param ... The filename format args.
+ * @note The contents of the file are assume to be a string.
+ *       Trailing newlines are removed.
+ */
+int onlp_file_read_str_dst(char* dst, int size, const char* fmt, ...);
+
 /**
  * @brief Read and return the integer contents of the given file.
  * @param value Receives the integer value.

packages/base/any/onlp/src/onlplib/module/src/file.c

@@ -258,6 +258,27 @@ onlp_file_read_str(char** str, const char* fmt, ...)
     return rv;
 }
 
+int
+onlp_file_vread_str_dst(char* dst, int size, const char* fmt, va_list vargs)
+{
+    char* s;
+    ONLP_TRY(onlp_file_vread_str(&s, fmt, vargs));
+    aim_strlcpy(dst, s, size);
+    aim_free(s);
+    return ONLP_STATUS_OK;
+}
+
+int
+onlp_file_read_str_dst(char* dst, int size, const char* fmt, ...)
+{
+    int rv;
+    va_list vargs;
+    va_start(vargs, fmt);
+    rv = onlp_file_vread_str_dst(dst, size, fmt, vargs);
+    va_end(vargs);
+    return rv;
+}
+
 int
 onlp_file_vread_int(int* value, const char* fmt, va_list vargs)
 {