re-search_prompt.c

#define PROMPT(buffer, direction, index, result) \
        do { \
          char *after; \
          char before[MAX_LINE_LEN]; \
          fprintf(stderr, "(search %c%d) `%s':", direction[0], index, buffer); \
          if (index > 0) {\
            int i = 0; \
            after = strstr(result,buffer); \
            int len = strlen(result) - strlen(after); \
            strcpy(before, result); \
            before[len] = 0; \
            i = fprintf(stderr, " %s%s", before, after); \
            fprintf(stderr, "\033[%dD", strlen(after)); \
          } \
        } while (0)