[PATCH] Split config name parse functions into parse.c
The plan is to add command line options that mirror the config options,
so fio will be easier to script.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/parse.c b/parse.c
new file mode 100644
index 0000000..82cdf8a
--- /dev/null
+++ b/parse.c
@@ -0,0 +1,234 @@
+/*
+ * This file contains the ini and command liner parser main.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+
+#include "parse.h"
+
+static unsigned long get_mult_time(char c)
+{
+ switch (c) {
+ case 'm':
+ case 'M':
+ return 60;
+ case 'h':
+ case 'H':
+ return 60 * 60;
+ case 'd':
+ case 'D':
+ return 24 * 60 * 60;
+ default:
+ return 1;
+ }
+}
+
+static unsigned long get_mult_bytes(char c)
+{
+ switch (c) {
+ case 'k':
+ case 'K':
+ return 1024;
+ case 'm':
+ case 'M':
+ return 1024 * 1024;
+ case 'g':
+ case 'G':
+ return 1024 * 1024 * 1024;
+ default:
+ return 1;
+ }
+}
+
+/*
+ * convert string after '=' into decimal value, noting any size suffix
+ */
+static int str_to_decimal(char *p, unsigned long long *val, int kilo)
+{
+ char *str;
+ int len;
+
+ str = strchr(p, '=');
+ if (!str)
+ return 1;
+
+ str++;
+ len = strlen(str);
+
+ *val = strtoul(str, NULL, 10);
+ if (*val == ULONG_MAX && errno == ERANGE)
+ return 1;
+
+ if (kilo)
+ *val *= get_mult_bytes(str[len - 1]);
+ else
+ *val *= get_mult_time(str[len - 1]);
+ return 0;
+}
+
+int check_str_bytes(char *p, char *name, unsigned long long *val)
+{
+ if (strncmp(p, name, strlen(name) - 1))
+ return 1;
+
+ return str_to_decimal(p, val, 1);
+}
+
+int check_str_time(char *p, char *name, unsigned long long *val)
+{
+ if (strncmp(p, name, strlen(name) - 1))
+ return 1;
+
+ return str_to_decimal(p, val, 0);
+}
+
+void strip_blank_front(char **p)
+{
+ char *s = *p;
+
+ while (isspace(*s))
+ s++;
+}
+
+void strip_blank_end(char *p)
+{
+ char *s = p + strlen(p) - 1;
+
+ while (isspace(*s) || iscntrl(*s))
+ s--;
+
+ *(s + 1) = '\0';
+}
+
+int check_str(char *p, char *name, str_cb_fn *cb, void *data)
+{
+ char *s;
+
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
+ s = strstr(p, name);
+ if (!s)
+ return 1;
+
+ s = strchr(s, '=');
+ if (!s)
+ return 1;
+
+ s++;
+ strip_blank_front(&s);
+ return cb(data, s);
+}
+
+int check_strstore(char *p, char *name, char *dest)
+{
+ char *s;
+
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
+ s = strstr(p, name);
+ if (!s)
+ return 1;
+
+ s = strchr(p, '=');
+ if (!s)
+ return 1;
+
+ s++;
+ strip_blank_front(&s);
+
+ strcpy(dest, s);
+ return 0;
+}
+
+static int __check_range_bytes(char *str, unsigned long *val)
+{
+ char suffix;
+
+ if (sscanf(str, "%lu%c", val, &suffix) == 2) {
+ *val *= get_mult_bytes(suffix);
+ return 0;
+ }
+
+ if (sscanf(str, "%lu", val) == 1)
+ return 0;
+
+ return 1;
+}
+
+int check_range_bytes(char *p, char *name, unsigned long *s, unsigned long *e)
+{
+ char option[128];
+ char *str, *p1, *p2;
+
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
+ strcpy(option, p);
+ p = option;
+
+ str = strstr(p, name);
+ if (!str)
+ return 1;
+
+ p += strlen(name);
+
+ str = strchr(p, '=');
+ if (!str)
+ return 1;
+
+ /*
+ * 'p' now holds whatever is after the '=' sign
+ */
+ p1 = str + 1;
+
+ /*
+ * terminate p1 at the '-' sign
+ */
+ p = strchr(p1, '-');
+ if (!p)
+ return 1;
+
+ p2 = p + 1;
+ *p = '\0';
+
+ if (!__check_range_bytes(p1, s) && !__check_range_bytes(p2, e))
+ return 0;
+
+ return 1;
+}
+
+int check_int(char *p, char *name, unsigned int *val)
+{
+ char *str;
+
+ if (strncmp(p, name, strlen(name)))
+ return 1;
+
+ str = strstr(p, name);
+ if (!str)
+ return 1;
+
+ str = strchr(p, '=');
+ if (!str)
+ return 1;
+
+ str++;
+
+ if (sscanf(str, "%u", val) == 1)
+ return 0;
+
+ return 1;
+}
+
+int check_strset(char *p, char *name)
+{
+ return strncmp(p, name, strlen(name));
+}
+