1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation. 3 * Copyright(c) 2014 6WIND S.A. 4 */ 5 6 #include <string.h> 7 #include <rte_log.h> 8 #include "parse.h" 9 10 /* 11 * Parse elem, the elem could be single number/range or group 12 * 1) A single number elem, it's just a simple digit. e.g. 9 13 * 2) A single range elem, two digits with a '-' between. e.g. 2-6 14 * 3) A group elem, combines multiple 1) or 2) e.g 0,2-4,6 15 * Within group, '-' used for a range separator; 16 * ',' used for a single number. 17 */ 18 int 19 parse_set(const char *input, uint16_t set[], unsigned int num) 20 { 21 unsigned int idx; 22 const char *str = input; 23 char *end = NULL; 24 unsigned int min, max; 25 26 memset(set, 0, num * sizeof(uint16_t)); 27 28 while (isblank(*str)) 29 str++; 30 31 /* only digit or left bracket is qualify for start point */ 32 if (!isdigit(*str) || *str == '\0') 33 return -1; 34 35 while (isblank(*str)) 36 str++; 37 if (*str == '\0') 38 return -1; 39 40 min = num; 41 do { 42 43 /* go ahead to the first digit */ 44 while (isblank(*str)) 45 str++; 46 if (!isdigit(*str)) 47 return -1; 48 49 /* get the digit value */ 50 errno = 0; 51 idx = strtoul(str, &end, 10); 52 if (errno || end == NULL || idx >= num) 53 return -1; 54 55 /* go ahead to separator '-' and ',' */ 56 while (isblank(*end)) 57 end++; 58 if (*end == '-') { 59 if (min == num) 60 min = idx; 61 else /* avoid continuous '-' */ 62 return -1; 63 } else if ((*end == ',') || (*end == ':') || (*end == '\0')) { 64 max = idx; 65 66 if (min == num) 67 min = idx; 68 69 for (idx = RTE_MIN(min, max); 70 idx <= RTE_MAX(min, max); idx++) { 71 set[idx] = 1; 72 } 73 min = num; 74 } else 75 return -1; 76 77 str = end + 1; 78 } while ((*end != '\0') && (*end != ':')); 79 80 return str - input; 81 } 82 83 int 84 parse_branch_ratio(const char *input, float *branch_ratio) 85 { 86 const char *str = input; 87 char *end = NULL; 88 89 while (isblank(*str)) 90 str++; 91 92 if (*str == '\0') 93 return -1; 94 95 /* Go straight to the ':' separator if present */ 96 while ((*str != '\0') && (*str != ':')) 97 str++; 98 99 /* Branch ratio not specified in args so leave it at default setting */ 100 if (*str == '\0') 101 return 0; 102 103 /* Confirm ':' separator present */ 104 if (*str != ':') 105 return -1; 106 107 str++; 108 errno = 0; 109 *branch_ratio = strtof(str, &end); 110 if (errno || end == NULL) 111 return -1; 112 113 if (*end != '\0') 114 return -1; 115 116 str = end + 1; 117 118 return str - input; 119 } 120