+
+#define REGEX_CHARS "^[]{}()|.*+?!$"
+#define CCL_CHARS "#?\\"
+
+static int has_ccl_masking(const char *src_str,
+ int src_len,
+ const char **truncation_aliases,
+ const char **mask_aliases)
+{
+ size_t j;
+ int quote_mode = 0;
+
+ for (j = 0; j < src_len; j++)
+ {
+ size_t op_size;
+ if (j > 0 && src_str[j-1] == '\\')
+ ;
+ else if (src_str[j] == '"')
+ quote_mode = !quote_mode;
+ else if (!quote_mode &&
+ (op_size = cmp_operator(truncation_aliases,
+ src_str + j)))
+ return 1;
+ else if (!quote_mode &&
+ (op_size = cmp_operator(mask_aliases,
+ src_str + j)))
+ return 1;
+ }
+ return 0;
+}
+
+static int append_term(CCL_parser cclp, const char *src_str, size_t src_len,
+ char *dst_term, int regex_trunc, int z3958_trunc,
+ const char **truncation_aliases,
+ const char **mask_aliases,
+ int is_first, int is_last,
+ int *left_trunc, int *right_trunc)
+{
+ size_t j;
+ int quote_mode = 0;
+
+ for (j = 0; j < src_len; j++)
+ {
+ size_t op_size;
+ if (j > 0 && src_str[j-1] == '\\')
+ {
+ if (regex_trunc && strchr(REGEX_CHARS "\\", src_str[j]))
+ strcat(dst_term, "\\");
+ else if (z3958_trunc && strchr(CCL_CHARS "\\", src_str[j]))
+ strcat(dst_term, "\\");
+ strxcat(dst_term, src_str + j, 1);
+ }
+ else if (src_str[j] == '"')
+ quote_mode = !quote_mode;
+ else if (!quote_mode &&
+ (op_size = cmp_operator(truncation_aliases,
+ src_str + j))
+ )
+ {
+ j += (op_size - 1); /* j++ in for loop */
+ if (regex_trunc)
+ strcat(dst_term, ".*");
+ else if (z3958_trunc)
+ strcat(dst_term, "?");
+ else if (is_first && j == 0)
+ *left_trunc = 1;
+ else if (is_last && j == src_len - 1)
+ *right_trunc = 1;
+ else
+ {
+ cclp->error_code = CCL_ERR_TRUNC_NOT_EMBED;
+ return -1;
+ }
+ }
+ else if (!quote_mode &&
+ (op_size = cmp_operator(mask_aliases, src_str + j)))
+ {
+ j += (op_size - 1); /* j++ in for loop */
+ if (regex_trunc)
+ strcat(dst_term, ".");
+ else if (z3958_trunc)
+ strcat(dst_term, "#");
+ else
+ {
+ cclp->error_code = CCL_ERR_TRUNC_NOT_SINGLE;
+ return -1;
+ }
+ }
+ else if (src_str[j] != '\\')
+ {
+ if (regex_trunc && strchr(REGEX_CHARS, src_str[j]))
+ strcat(dst_term, "\\");
+ else if (z3958_trunc && strchr(CCL_CHARS, src_str[j]))
+ strcat(dst_term, "\\");
+ strxcat(dst_term, src_str + j, 1);
+ }
+ }
+ return 0;
+}
+
+/**
+ * search_term: Parse CCL search term.