1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "../SDL_internal.h"
23#include "SDL_syslocale.h"
24#include "SDL_hints.h"
25
26static SDL_Locale *
27build_locales_from_csv_string(char *csv)
28{
29 size_t num_locales = 1; /* at least one */
30 size_t slen;
31 size_t alloclen;
32 char *ptr;
33 SDL_Locale *loc;
34 SDL_Locale *retval;
35
36 if (!csv || !csv[0]) {
37 return NULL; /* nothing to report */
38 }
39
40 for (ptr = csv; *ptr; ptr++) {
41 if (*ptr == ',') {
42 num_locales++;
43 }
44 }
45
46 num_locales++; /* one more for terminator */
47
48 slen = ((size_t) (ptr - csv)) + 1; /* strlen(csv) + 1 */
49 alloclen = slen + (num_locales * sizeof (SDL_Locale));
50
51 loc = retval = (SDL_Locale *) SDL_calloc(1, alloclen);
52 if (!retval) {
53 SDL_OutOfMemory();
54 return NULL; /* oh well */
55 }
56 ptr = (char *) (retval + num_locales);
57 SDL_strlcpy(ptr, csv, slen);
58
59 while (SDL_TRUE) { /* parse out the string */
60 while (*ptr == ' ') ptr++; /* skip whitespace. */
61 if (*ptr == '\0') {
62 break;
63 }
64 loc->language = ptr++;
65 while (SDL_TRUE) {
66 const char ch = *ptr;
67 if (ch == '_') {
68 *(ptr++) = '\0';
69 loc->country = ptr;
70 } else if (ch == ' ') {
71 *(ptr++) = '\0'; /* trim ending whitespace and keep going. */
72 } else if (ch == ',') {
73 *(ptr++) = '\0';
74 loc++;
75 break;
76 } else if (ch == '\0') {
77 loc++;
78 break;
79 } else {
80 ptr++; /* just keep going, still a valid string */
81 }
82 }
83 }
84
85 return retval;
86}
87
88SDL_Locale *
89SDL_GetPreferredLocales(void)
90{
91 char locbuf[128]; /* enough for 21 "xx_YY," language strings. */
92 const char *hint = SDL_GetHint(SDL_HINT_PREFERRED_LOCALES);
93 if (hint) {
94 SDL_strlcpy(locbuf, hint, sizeof (locbuf));
95 } else {
96 SDL_zeroa(locbuf);
97 SDL_SYS_GetPreferredLocales(locbuf, sizeof (locbuf));
98 }
99 return build_locales_from_csv_string(locbuf);
100}
101
102/* vi: set ts=4 sw=4 expandtab: */
103
104