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Commit | Line | Data |
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b1bda751 CW |
1 | #include "git-compat-util.h" |
2 | #include "gettext.h" | |
3 | #include "parse.h" | |
4 | ||
5 | static uintmax_t get_unit_factor(const char *end) | |
6 | { | |
7 | if (!*end) | |
8 | return 1; | |
9 | else if (!strcasecmp(end, "k")) | |
10 | return 1024; | |
11 | else if (!strcasecmp(end, "m")) | |
12 | return 1024 * 1024; | |
13 | else if (!strcasecmp(end, "g")) | |
14 | return 1024 * 1024 * 1024; | |
15 | return 0; | |
16 | } | |
17 | ||
18 | int git_parse_signed(const char *value, intmax_t *ret, intmax_t max) | |
19 | { | |
20 | if (value && *value) { | |
21 | char *end; | |
22 | intmax_t val; | |
23 | intmax_t factor; | |
24 | ||
25 | if (max < 0) | |
26 | BUG("max must be a positive integer"); | |
27 | ||
28 | errno = 0; | |
29 | val = strtoimax(value, &end, 0); | |
30 | if (errno == ERANGE) | |
31 | return 0; | |
32 | if (end == value) { | |
33 | errno = EINVAL; | |
34 | return 0; | |
35 | } | |
36 | factor = get_unit_factor(end); | |
37 | if (!factor) { | |
38 | errno = EINVAL; | |
39 | return 0; | |
40 | } | |
41 | if ((val < 0 && -max / factor > val) || | |
42 | (val > 0 && max / factor < val)) { | |
43 | errno = ERANGE; | |
44 | return 0; | |
45 | } | |
46 | val *= factor; | |
47 | *ret = val; | |
48 | return 1; | |
49 | } | |
50 | errno = EINVAL; | |
51 | return 0; | |
52 | } | |
53 | ||
54 | static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max) | |
55 | { | |
56 | if (value && *value) { | |
57 | char *end; | |
58 | uintmax_t val; | |
59 | uintmax_t factor; | |
60 | ||
61 | /* negative values would be accepted by strtoumax */ | |
62 | if (strchr(value, '-')) { | |
63 | errno = EINVAL; | |
64 | return 0; | |
65 | } | |
66 | errno = 0; | |
67 | val = strtoumax(value, &end, 0); | |
68 | if (errno == ERANGE) | |
69 | return 0; | |
70 | if (end == value) { | |
71 | errno = EINVAL; | |
72 | return 0; | |
73 | } | |
74 | factor = get_unit_factor(end); | |
75 | if (!factor) { | |
76 | errno = EINVAL; | |
77 | return 0; | |
78 | } | |
79 | if (unsigned_mult_overflows(factor, val) || | |
80 | factor * val > max) { | |
81 | errno = ERANGE; | |
82 | return 0; | |
83 | } | |
84 | val *= factor; | |
85 | *ret = val; | |
86 | return 1; | |
87 | } | |
88 | errno = EINVAL; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | int git_parse_int(const char *value, int *ret) | |
93 | { | |
94 | intmax_t tmp; | |
95 | if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int))) | |
96 | return 0; | |
97 | *ret = tmp; | |
98 | return 1; | |
99 | } | |
100 | ||
101 | int git_parse_int64(const char *value, int64_t *ret) | |
102 | { | |
103 | intmax_t tmp; | |
104 | if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t))) | |
105 | return 0; | |
106 | *ret = tmp; | |
107 | return 1; | |
108 | } | |
109 | ||
110 | int git_parse_ulong(const char *value, unsigned long *ret) | |
111 | { | |
112 | uintmax_t tmp; | |
113 | if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long))) | |
114 | return 0; | |
115 | *ret = tmp; | |
116 | return 1; | |
117 | } | |
118 | ||
119 | int git_parse_ssize_t(const char *value, ssize_t *ret) | |
120 | { | |
121 | intmax_t tmp; | |
122 | if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t))) | |
123 | return 0; | |
124 | *ret = tmp; | |
125 | return 1; | |
126 | } | |
127 | ||
128 | int git_parse_maybe_bool_text(const char *value) | |
129 | { | |
130 | if (!value) | |
131 | return 1; | |
132 | if (!*value) | |
133 | return 0; | |
134 | if (!strcasecmp(value, "true") | |
135 | || !strcasecmp(value, "yes") | |
136 | || !strcasecmp(value, "on")) | |
137 | return 1; | |
138 | if (!strcasecmp(value, "false") | |
139 | || !strcasecmp(value, "no") | |
140 | || !strcasecmp(value, "off")) | |
141 | return 0; | |
142 | return -1; | |
143 | } | |
144 | ||
145 | int git_parse_maybe_bool(const char *value) | |
146 | { | |
147 | int v = git_parse_maybe_bool_text(value); | |
148 | if (0 <= v) | |
149 | return v; | |
150 | if (git_parse_int(value, &v)) | |
151 | return !!v; | |
152 | return -1; | |
153 | } | |
154 | ||
155 | /* | |
156 | * Parse environment variable 'k' as a boolean (in various | |
157 | * possible spellings); if missing, use the default value 'def'. | |
158 | */ | |
159 | int git_env_bool(const char *k, int def) | |
160 | { | |
161 | const char *v = getenv(k); | |
162 | int val; | |
163 | if (!v) | |
164 | return def; | |
165 | val = git_parse_maybe_bool(v); | |
166 | if (val < 0) | |
167 | die(_("bad boolean environment value '%s' for '%s'"), | |
168 | v, k); | |
169 | return val; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Parse environment variable 'k' as ulong with possibly a unit | |
174 | * suffix; if missing, use the default value 'val'. | |
175 | */ | |
176 | unsigned long git_env_ulong(const char *k, unsigned long val) | |
177 | { | |
178 | const char *v = getenv(k); | |
179 | if (v && !git_parse_ulong(v, &val)) | |
180 | die(_("failed to parse %s"), k); | |
181 | return val; | |
182 | } |