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- #include <linux/ctype.h>
- #include <linux/types.h>
- #include <linux/export.h>
- #include <linux/parser.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- static int match_one(char *s, const char *p, substring_t args[])
- {
- char *meta;
- int argc = 0;
- if (!p)
- return 1;
- while(1) {
- int len = -1;
- meta = strchr(p, '%');
- if (!meta)
- return strcmp(p, s) == 0;
- if (strncmp(p, s, meta-p))
- return 0;
- s += meta - p;
- p = meta + 1;
- if (isdigit(*p))
- len = simple_strtoul(p, (char **) &p, 10);
- else if (*p == '%') {
- if (*s++ != '%')
- return 0;
- p++;
- continue;
- }
- if (argc >= MAX_OPT_ARGS)
- return 0;
- args[argc].from = s;
- switch (*p++) {
- case 's': {
- size_t str_len = strlen(s);
- if (str_len == 0)
- return 0;
- if (len == -1 || len > str_len)
- len = str_len;
- args[argc].to = s + len;
- break;
- }
- case 'd':
- simple_strtol(s, &args[argc].to, 0);
- goto num;
- case 'u':
- simple_strtoul(s, &args[argc].to, 0);
- goto num;
- case 'o':
- simple_strtoul(s, &args[argc].to, 8);
- goto num;
- case 'x':
- simple_strtoul(s, &args[argc].to, 16);
- num:
- if (args[argc].to == args[argc].from)
- return 0;
- break;
- default:
- return 0;
- }
- s = args[argc].to;
- argc++;
- }
- }
- int match_token(char *s, const match_table_t table, substring_t args[])
- {
- const struct match_token *p;
- for (p = table; !match_one(s, p->pattern, args) ; p++)
- ;
- return p->token;
- }
- EXPORT_SYMBOL(match_token);
- static int match_number(substring_t *s, int *result, int base)
- {
- char *endp;
- char *buf;
- int ret;
- long val;
- size_t len = s->to - s->from;
- buf = kmalloc(len + 1, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- memcpy(buf, s->from, len);
- buf[len] = '\0';
- ret = 0;
- val = simple_strtol(buf, &endp, base);
- if (endp == buf)
- ret = -EINVAL;
- else if (val < (long)INT_MIN || val > (long)INT_MAX)
- ret = -ERANGE;
- else
- *result = (int) val;
- kfree(buf);
- return ret;
- }
- int match_int(substring_t *s, int *result)
- {
- return match_number(s, result, 0);
- }
- EXPORT_SYMBOL(match_int);
- int match_octal(substring_t *s, int *result)
- {
- return match_number(s, result, 8);
- }
- EXPORT_SYMBOL(match_octal);
- int match_hex(substring_t *s, int *result)
- {
- return match_number(s, result, 16);
- }
- EXPORT_SYMBOL(match_hex);
- bool match_wildcard(const char *pattern, const char *str)
- {
- const char *s = str;
- const char *p = pattern;
- bool star = false;
- while (*s) {
- switch (*p) {
- case '?':
- s++;
- p++;
- break;
- case '*':
- star = true;
- str = s;
- if (!*++p)
- return true;
- pattern = p;
- break;
- default:
- if (*s == *p) {
- s++;
- p++;
- } else {
- if (!star)
- return false;
- str++;
- s = str;
- p = pattern;
- }
- break;
- }
- }
- if (*p == '*')
- ++p;
- return !*p;
- }
- EXPORT_SYMBOL(match_wildcard);
- size_t match_strlcpy(char *dest, const substring_t *src, size_t size)
- {
- size_t ret = src->to - src->from;
- if (size) {
- size_t len = ret >= size ? size - 1 : ret;
- memcpy(dest, src->from, len);
- dest[len] = '\0';
- }
- return ret;
- }
- EXPORT_SYMBOL(match_strlcpy);
- char *match_strdup(const substring_t *s)
- {
- size_t sz = s->to - s->from + 1;
- char *p = kmalloc(sz, GFP_KERNEL);
- if (p)
- match_strlcpy(p, s, sz);
- return p;
- }
- EXPORT_SYMBOL(match_strdup);
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