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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
d5a89d7d KS |
2 | |
3 | /* | |
4 | * Concatenates/copies strings. In any case, terminates in all cases | |
9e5bd85a VC |
5 | * with '\0' and moves the @dest pointer forward to the added '\0'. |
6 | * Returns the remaining size, and 0 if the string was truncated. | |
7 | * | |
8 | * Due to the intended usage, these helpers silently noop invocations | |
9 | * having zero size. This is technically an exception to the above | |
10 | * statement "terminates in all cases". It's unexpected for such calls to | |
11 | * occur outside of a loop where this is the preferred behavior. | |
d5a89d7d KS |
12 | */ |
13 | ||
11c3a366 | 14 | #include <stdarg.h> |
d5a89d7d KS |
15 | #include <stdio.h> |
16 | #include <string.h> | |
cf0fbc49 | 17 | |
e70151c9 | 18 | #include "string-util.h" |
d5a89d7d KS |
19 | #include "strxcpyx.h" |
20 | ||
e70151c9 YW |
21 | size_t strnpcpy_full(char **dest, size_t size, const char *src, size_t len, bool *ret_truncated) { |
22 | bool truncated = false; | |
23 | ||
f91049d5 VC |
24 | assert(dest); |
25 | assert(src); | |
26 | ||
e70151c9 YW |
27 | if (size == 0) { |
28 | if (ret_truncated) | |
29 | *ret_truncated = len > 0; | |
9e5bd85a | 30 | return 0; |
e70151c9 | 31 | } |
9e5bd85a | 32 | |
d5a89d7d KS |
33 | if (len >= size) { |
34 | if (size > 1) | |
35 | *dest = mempcpy(*dest, src, size-1); | |
36 | size = 0; | |
e70151c9 | 37 | truncated = true; |
68619204 LP |
38 | } else if (len > 0) { |
39 | *dest = mempcpy(*dest, src, len); | |
40 | size -= len; | |
d5a89d7d | 41 | } |
68619204 | 42 | |
e70151c9 YW |
43 | if (ret_truncated) |
44 | *ret_truncated = truncated; | |
45 | ||
d5a89d7d KS |
46 | *dest[0] = '\0'; |
47 | return size; | |
48 | } | |
49 | ||
e70151c9 | 50 | size_t strpcpy_full(char **dest, size_t size, const char *src, bool *ret_truncated) { |
7e4831d2 YW |
51 | assert(dest); |
52 | assert(src); | |
53 | ||
e70151c9 | 54 | return strnpcpy_full(dest, size, src, strlen(src), ret_truncated); |
7e4831d2 YW |
55 | } |
56 | ||
e70151c9 YW |
57 | size_t strpcpyf_full(char **dest, size_t size, bool *ret_truncated, const char *src, ...) { |
58 | bool truncated = false; | |
d5a89d7d KS |
59 | va_list va; |
60 | int i; | |
61 | ||
f91049d5 VC |
62 | assert(dest); |
63 | assert(src); | |
64 | ||
d5a89d7d KS |
65 | va_start(va, src); |
66 | i = vsnprintf(*dest, size, src, va); | |
e70151c9 YW |
67 | va_end(va); |
68 | ||
69 | if (i < (int) size) { | |
d5a89d7d KS |
70 | *dest += i; |
71 | size -= i; | |
e70151c9 | 72 | } else { |
d5a89d7d | 73 | size = 0; |
e70151c9 YW |
74 | truncated = i > 0; |
75 | } | |
76 | ||
77 | if (ret_truncated) | |
78 | *ret_truncated = truncated; | |
79 | ||
d5a89d7d KS |
80 | return size; |
81 | } | |
82 | ||
e70151c9 YW |
83 | size_t strpcpyl_full(char **dest, size_t size, bool *ret_truncated, const char *src, ...) { |
84 | bool truncated = false; | |
d5a89d7d KS |
85 | va_list va; |
86 | ||
f91049d5 VC |
87 | assert(dest); |
88 | assert(src); | |
89 | ||
d5a89d7d KS |
90 | va_start(va, src); |
91 | do { | |
e70151c9 YW |
92 | bool t; |
93 | ||
94 | size = strpcpy_full(dest, size, src, &t); | |
95 | truncated = truncated || t; | |
d5a89d7d | 96 | src = va_arg(va, char *); |
68619204 | 97 | } while (src); |
d5a89d7d | 98 | va_end(va); |
e70151c9 YW |
99 | |
100 | if (ret_truncated) | |
101 | *ret_truncated = truncated; | |
d5a89d7d KS |
102 | return size; |
103 | } | |
104 | ||
e70151c9 | 105 | size_t strnscpy_full(char *dest, size_t size, const char *src, size_t len, bool *ret_truncated) { |
d5a89d7d KS |
106 | char *s; |
107 | ||
f91049d5 VC |
108 | assert(dest); |
109 | assert(src); | |
110 | ||
d5a89d7d | 111 | s = dest; |
e70151c9 | 112 | return strnpcpy_full(&s, size, src, len, ret_truncated); |
7e4831d2 YW |
113 | } |
114 | ||
e70151c9 | 115 | size_t strscpy_full(char *dest, size_t size, const char *src, bool *ret_truncated) { |
7e4831d2 YW |
116 | assert(dest); |
117 | assert(src); | |
118 | ||
e70151c9 | 119 | return strnscpy_full(dest, size, src, strlen(src), ret_truncated); |
d5a89d7d KS |
120 | } |
121 | ||
e70151c9 YW |
122 | size_t strscpyl_full(char *dest, size_t size, bool *ret_truncated, const char *src, ...) { |
123 | bool truncated = false; | |
d5a89d7d KS |
124 | va_list va; |
125 | char *s; | |
126 | ||
f91049d5 VC |
127 | assert(dest); |
128 | assert(src); | |
129 | ||
d5a89d7d KS |
130 | va_start(va, src); |
131 | s = dest; | |
132 | do { | |
e70151c9 YW |
133 | bool t; |
134 | ||
135 | size = strpcpy_full(&s, size, src, &t); | |
136 | truncated = truncated || t; | |
d5a89d7d | 137 | src = va_arg(va, char *); |
68619204 | 138 | } while (src); |
d5a89d7d KS |
139 | va_end(va); |
140 | ||
e70151c9 YW |
141 | if (ret_truncated) |
142 | *ret_truncated = truncated; | |
143 | ||
d5a89d7d KS |
144 | return size; |
145 | } |