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15#include <linux/export.h>
16#include <linux/kernel.h>
17#include <linux/string.h>
18#include <linux/ctype.h>
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26static int get_range(char **str, int *pint, int n)
27{
28 int x, inc_counter, upper_range;
29
30 (*str)++;
31 upper_range = simple_strtol((*str), NULL, 0);
32 inc_counter = upper_range - *pint;
33 for (x = *pint; n && x < upper_range; x++, n--)
34 *pint++ = x;
35 return inc_counter;
36}
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52
53int get_option(char **str, int *pint)
54{
55 char *cur = *str;
56
57 if (!cur || !(*cur))
58 return 0;
59 *pint = simple_strtol(cur, str, 0);
60 if (cur == *str)
61 return 0;
62 if (**str == ',') {
63 (*str)++;
64 return 2;
65 }
66 if (**str == '-')
67 return 3;
68
69 return 1;
70}
71EXPORT_SYMBOL(get_option);
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90char *get_options(const char *str, int nints, int *ints)
91{
92 int res, i = 1;
93
94 while (i < nints) {
95 res = get_option((char **)&str, ints + i);
96 if (res == 0)
97 break;
98 if (res == 3) {
99 int range_nums;
100 range_nums = get_range((char **)&str, ints + i, nints - i);
101 if (range_nums < 0)
102 break;
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108 i += (range_nums - 1);
109 }
110 i++;
111 if (res == 1)
112 break;
113 }
114 ints[0] = i - 1;
115 return (char *)str;
116}
117EXPORT_SYMBOL(get_options);
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127
128unsigned long long memparse(const char *ptr, char **retptr)
129{
130 char *endptr;
131
132 unsigned long long ret = simple_strtoull(ptr, &endptr, 0);
133
134 switch (*endptr) {
135 case 'E':
136 case 'e':
137 ret <<= 10;
138 case 'P':
139 case 'p':
140 ret <<= 10;
141 case 'T':
142 case 't':
143 ret <<= 10;
144 case 'G':
145 case 'g':
146 ret <<= 10;
147 case 'M':
148 case 'm':
149 ret <<= 10;
150 case 'K':
151 case 'k':
152 ret <<= 10;
153 endptr++;
154 default:
155 break;
156 }
157
158 if (retptr)
159 *retptr = endptr;
160
161 return ret;
162}
163EXPORT_SYMBOL(memparse);
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175bool parse_option_str(const char *str, const char *option)
176{
177 while (*str) {
178 if (!strncmp(str, option, strlen(option))) {
179 str += strlen(option);
180 if (!*str || *str == ',')
181 return true;
182 }
183
184 while (*str && *str != ',')
185 str++;
186
187 if (*str == ',')
188 str++;
189 }
190
191 return false;
192}
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198
199char *next_arg(char *args, char **param, char **val)
200{
201 unsigned int i, equals = 0;
202 int in_quote = 0, quoted = 0;
203 char *next;
204
205 if (*args == '"') {
206 args++;
207 in_quote = 1;
208 quoted = 1;
209 }
210
211 for (i = 0; args[i]; i++) {
212 if (isspace(args[i]) && !in_quote)
213 break;
214 if (equals == 0) {
215 if (args[i] == '=')
216 equals = i;
217 }
218 if (args[i] == '"')
219 in_quote = !in_quote;
220 }
221
222 *param = args;
223 if (!equals)
224 *val = NULL;
225 else {
226 args[equals] = '\0';
227 *val = args + equals + 1;
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229
230 if (**val == '"') {
231 (*val)++;
232 if (args[i-1] == '"')
233 args[i-1] = '\0';
234 }
235 }
236 if (quoted && args[i-1] == '"')
237 args[i-1] = '\0';
238
239 if (args[i]) {
240 args[i] = '\0';
241 next = args + i + 1;
242 } else
243 next = args + i;
244
245
246 return skip_spaces(next);
247}
248