| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #ifndef COMMAND_ARGS_H | ||
| 2 | #define COMMAND_ARGS_H | ||
| 3 | |||
| 4 | #include <stdbool.h> | ||
| 5 | #include <stddef.h> | ||
| 6 | #include "error.h" | ||
| 7 | #include "run.h" | ||
| 8 | #include "util/base64.h" | ||
| 9 | #include "util/debug.h" | ||
| 10 | #include "util/macros.h" | ||
| 11 | |||
| 12 | typedef enum { | ||
| 13 | ARGERR_NONE, | ||
| 14 | ARGERR_INVALID_OPTION, | ||
| 15 | ARGERR_TOO_MANY_OPTIONS, | ||
| 16 | ARGERR_OPTION_ARGUMENT_MISSING, | ||
| 17 | ARGERR_OPTION_ARGUMENT_NOT_SEPARATE, | ||
| 18 | ARGERR_TOO_FEW_ARGUMENTS, | ||
| 19 | ARGERR_TOO_MANY_ARGUMENTS, | ||
| 20 | } ArgParseError; | ||
| 21 | |||
| 22 | typedef struct { | ||
| 23 | char ch; | ||
| 24 | unsigned int val; | ||
| 25 | } FlagMapping; | ||
| 26 | |||
| 27 | 10835 | static inline CommandArgs cmdargs_new(char **args) | |
| 28 | { | ||
| 29 | 10835 | return (CommandArgs){.args = args}; | |
| 30 | } | ||
| 31 | |||
| 32 | // Map ASCII alphanumeric characters to values between 1 and 62, | ||
| 33 | // for use as bitset indices in CommandArgs::flag_set | ||
| 34 | 15928 | static inline unsigned int cmdargs_flagset_idx(unsigned char c) | |
| 35 | { | ||
| 36 | // We use base64_decode() here simply because it does a similar byte | ||
| 37 | // mapping to the one we want and allows us to share the lookup table. | ||
| 38 | // There's no "real" base64 encoding involved. | ||
| 39 | 15928 | static_assert(BASE64_INVALID > 63); | |
| 40 |
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15928 | unsigned int idx = IS_CT_CONSTANT(c) ? base64_decode_branchy(c) : base64_decode(c); |
| 41 | 15928 | BUG_ON(idx > 61); | |
| 42 | 15928 | return idx + 1; | |
| 43 | } | ||
| 44 | |||
| 45 | 15859 | static inline CommandFlagSet cmdargs_flagset_bit(unsigned char flag) | |
| 46 | { | ||
| 47 | 15859 | return 1ULL << cmdargs_flagset_idx(flag); | |
| 48 | } | ||
| 49 | |||
| 50 | 242 | static inline CommandFlagSet cmdargs_flagset_from_str(const char *flags) | |
| 51 | { | ||
| 52 | 242 | CommandFlagSet set = 0; | |
| 53 | UNROLL_LOOP(16) | ||
| 54 |
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923 | for (size_t i = 0, n = strlen(flags); i < n; i++) { |
| 55 | 681 | set |= cmdargs_flagset_bit(flags[i]); | |
| 56 | } | ||
| 57 | 242 | return set; | |
| 58 | } | ||
| 59 | |||
| 60 | 12425 | static inline bool cmdargs_has_flag(const CommandArgs *a, unsigned char flag) | |
| 61 | { | ||
| 62 | 12425 | return (a->flag_set & cmdargs_flagset_bit(flag)); | |
| 63 | } | ||
| 64 | |||
| 65 | 121 | static inline bool cmdargs_has_any_flag(const CommandArgs *a, const char *flags) | |
| 66 | { | ||
| 67 | 121 | return (a->flag_set & cmdargs_flagset_from_str(flags)); | |
| 68 | } | ||
| 69 | |||
| 70 | // Return the rightmost flag in CommandArgs::flags[] that is also a member of | ||
| 71 | // `flagset`, or 0 if no such flags are present. CommandFunc handlers can use | ||
| 72 | // this to accept multiple, mutually exclusive flags and ignore all except the | ||
| 73 | // last. For example, `exec -s -t -s` is equivalent to `exec -s`. | ||
| 74 | 108 | static inline char cmdargs_pick_winning_flag_from_set(const CommandArgs *a, CommandFlagSet flagset) | |
| 75 | { | ||
| 76 |
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108 | if (!(a->flag_set & flagset)) { |
| 77 | return 0; | ||
| 78 | } | ||
| 79 | |||
| 80 | 25 | BUG_ON(a->nr_flags > ARRAYLEN(a->flags)); | |
| 81 |
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26 | for (size_t n = a->nr_flags, i = n - 1; i < n; i--) { |
| 82 | 26 | char flag = a->flags[i]; | |
| 83 |
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26 | if (flagset & cmdargs_flagset_bit(flag)) { |
| 84 | return flag; | ||
| 85 | } | ||
| 86 | } | ||
| 87 | |||
| 88 | return 0; | ||
| 89 | } | ||
| 90 | |||
| 91 | 108 | static inline char cmdargs_pick_winning_flag(const CommandArgs *a, const char *flagstr) | |
| 92 | { | ||
| 93 | 108 | CommandFlagSet set = cmdargs_flagset_from_str(flagstr); | |
| 94 | 108 | return cmdargs_pick_winning_flag_from_set(a, set); | |
| 95 | } | ||
| 96 | |||
| 97 | // Convert CommandArgs::flag_set to bit flags of a different format, | ||
| 98 | // by using a set of mappings | ||
| 99 | 26 | static inline unsigned int cmdargs_convert_flags ( | |
| 100 | const CommandArgs *a, | ||
| 101 | const FlagMapping *map, | ||
| 102 | size_t map_len | ||
| 103 | ) { | ||
| 104 | 26 | unsigned int val = 0; | |
| 105 | UNROLL_LOOP(16) | ||
| 106 |
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120 | for (size_t i = 0; i < map_len; i++, map++) { |
| 107 |
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94 | if (cmdargs_has_flag(a, map->ch)) { |
| 108 | 13 | val |= map->val; | |
| 109 | } | ||
| 110 | } | ||
| 111 | 26 | return val; | |
| 112 | } | ||
| 113 | |||
| 114 | bool parse_args(const Command *cmd, CommandArgs *a, ErrorBuffer *ebuf) NONNULL_ARGS WARN_UNUSED_RESULT; | ||
| 115 | ArgParseError do_parse_args(const Command *cmd, CommandArgs *a) NONNULL_ARGS WARN_UNUSED_RESULT; | ||
| 116 | |||
| 117 | #endif | ||
| 118 |