#include "db.h"
#include <mysql/mysql.h>
#include <mysql/mysql_version.h>
+#include <regex.h>
#include "error.h"
#include "net.h"
#include "string.h"
static void *mysql_ptr = NULL;
+/**
+ * contains name/replacement pairs used by s_a_r_list()
+ *
+ * \sa s_a_r()
+ */
+struct para_macro {
+ /** the name of the macro */
+ const char *name;
+ /** the replacement text */
+ const char *replacement;
+};
+
static struct para_macro macro_list[] = {
{ .name = "IS_N_SET",
.replacement = "(data.%s != '1')"
}
};
+/**
+ * simple search and replace routine
+ *
+ * \param src source string
+ * \param macro_name the name of the macro
+ * \param replacement the replacement format string
+ *
+ * In \p src, replace each occurence of \p macro_name(arg) by the string
+ * determined by the \p replacement format string. \p replacement may (but
+ * needs not) contain a single string conversion specifier (%s) which gets
+ * replaced by \p arg.
+ *
+ * \return A string in which all matches in \p src are replaced, or \p NULL if
+ * an syntax error was encountered. Caller must free the result.
+ *
+ * \sa regcomp(3)
+ */
+__must_check __malloc static char *s_a_r(const char *src, const char* macro_name,
+ const char *replacement)
+{
+ regex_t preg;
+ size_t nmatch = 1;
+ regmatch_t pmatch[1];
+ int eflags = 0;
+ char *dest = NULL;
+ const char *bufptr = src;
+
+ if (!macro_name || !replacement || !src)
+ return para_strdup(src);
+ regcomp(&preg, macro_name, 0);
+ while (regexec(&preg, bufptr, nmatch, pmatch, eflags)
+ != REG_NOMATCH) {
+ char *tmp, *arg, *o_bracket, *c_bracket;
+
+ o_bracket = strchr(bufptr + pmatch[0].rm_so, '(');
+ c_bracket = o_bracket? strchr(o_bracket, ')') : NULL;
+ if (!c_bracket)
+ goto out;
+ tmp = para_strdup(bufptr);
+ tmp[pmatch[0].rm_so] = '\0';
+ dest = para_strcat(dest, tmp);
+ free(tmp);
+
+ arg = para_strdup(o_bracket + 1);
+ arg[c_bracket - o_bracket - 1] = '\0';
+ tmp = make_message(replacement, arg);
+ free(arg);
+ dest = para_strcat(dest, tmp);
+ free(tmp);
+ bufptr = c_bracket;
+ bufptr++;
+ }
+ dest = para_strcat(dest, bufptr);
+// PARA_DEBUG_LOG("%s: returning %s\n", __func__, dest);
+out:
+ regfree(&preg);
+ return dest;
+}
+
+/**
+ * replace a string according to a list of macros
+ *
+ * \param macro_list the array containing a macro/replacement pairs.
+ * \param src the source string
+ *
+ * This function just calls s_a_r() for each element of \p macro_list.
+ *
+ * \return \p NULL if one of the underlying calls to \p s_a_r returned \p NULL.
+ * Otherwise the completely expanded version of \p src is returned.
+ */
+__must_check __malloc static char *s_a_r_list(struct para_macro *macro_list, char *src)
+{
+ struct para_macro *mp = macro_list;
+ char *ret = NULL, *tmp = para_strdup(src);
+
+ while (mp->name) {
+ ret = s_a_r(tmp, mp->name, mp->replacement);
+ free(tmp);
+ if (!ret) /* syntax error */
+ return NULL;
+ tmp = ret;
+ mp++;
+ }
+ //PARA_DEBUG_LOG("%s: returning %s\n", __func__, dest);
+ return ret;
+}
+
static int real_query(const char *query)
{
if (!mysql_ptr)
/*
* history
*/
-int com_hist(int fd, int argc, char *argv[]) {
+int com_hist(int fd, int argc, char *argv[])
+{
int ret;
void *result = NULL;
char *q, *atts;
if (!row[0])
goto out;
- tmp = make_message("%s X-Attribute-%s: ', %s, '\n", query,
+ tmp = make_message("%sX-Attribute-%s: ', %s, '\n", query,
row[0], row[0]);
free(query);
query = tmp;
/**
* the init function of the mysql-based audio file selector
*
- * Check the command line options and initialize all function pointers of \a db.
- * Connect to the mysql server and initialize the info string.
+ * \param db pointer to the struct to initialize
+ *
+ * Check the command line options and initialize all function pointers of \a
+ * db. Connect to the mysql server and initialize the info string.
+ *
+ * \return This function returns success even if it could not connect
+ * to the mysql server. This is because the connect is expected to fail
+ * if there the paraslash database is not yet created. This gives the
+ * user a chance to send the "cdb" to create the database.
*
* \sa struct audio_file_selector, misc_meta_data::selector_info,
* random_selector.c