mirror of
https://github.com/thepigeongenerator/mcaselector-lite
synced 2026-02-07 23:28:09 +01:00
Quinn
568f4e48cb
This is to silence the sparse `warning: dubious usage of x & !y`. The difference is insignificant and I am not going to argue sparse here.
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* This file is part of MCA-Selector-lite,
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* and is licensed under GPL-2.0-only.
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* Copyright (C)2025 quinnthepigeon@proton.me Quinn
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* For further information, view COPYING and CONTRIBUTORS
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* at: www.github.com/thepigeongenerator/mcaselector-lite */
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#include "conf.h"
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#include <assert.h>
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#include <inttypes.h>
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#include <mcaselector-lite/atrb.h>
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#include <mcaselector-lite/types.h>
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#include <stdlib.h>
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#include <string.h>
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/* Matches s1 with s2, returns a pointer to s1 where the match stopped. */
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static const char *strmat(const char *s1, const char *s2) PURE NONNULL((1, 2));
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static const char *strmat(const char *s1, const char *s2)
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{
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while ((*s1 == *s2) && *s1)
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s1++, s2++;
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return s1;
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}
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int conf_getkeyval(const char *restrict buf,
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const char *const restrict *restrict keys, int klen,
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const char *restrict *restrict out)
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{
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const char *tmp = NULL;
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ASSUME((klen > 0));
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int i = 0;
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for (; i < klen && !tmp; i++) {
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tmp = strmat(buf, keys[i]);
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tmp = keys[i][buf - tmp] ? tmp : NULL;
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}
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if (!tmp || *tmp != '=')
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return -1;
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*out = tmp + 1;
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return i;
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}
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int conf_procval(u8 type, const char *val, void *out)
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{
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char *end;
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switch (type) {
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case CONF_STR: *(char **)out = strdup(val); return 0;
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case CONF_S8: *(s8 *)out = strtoimax(val, &end, 0); return (end && !*end);
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case CONF_S16: *(s16 *)out = strtoimax(val, &end, 0); return (end && !*end);
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case CONF_S32: *(s32 *)out = strtoimax(val, &end, 0); return (end && !*end);
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case CONF_S64: *(s64 *)out = strtoimax(val, &end, 0); return (end && !*end);
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case CONF_U8: *(u8 *)out = strtoumax(val, &end, 0); return (end && !*end);
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case CONF_U16: *(u16 *)out = strtoumax(val, &end, 0); return (end && !*end);
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case CONF_U32: *(u32 *)out = strtoumax(val, &end, 0); return (end && !*end);
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case CONF_U64: *(u64 *)out = strtoumax(val, &end, 0); return (end && !*end);
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#if __SIZEOF_FLOAT__ == 4
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case CONF_F32: *(f32 *)out = strtof(val, &end); return (end && !*end);
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#else
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#error float is not 4 bytes wide
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#endif
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#if __SIZEOF_DOUBLE__ == 8
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case CONF_F64: *(f64 *)out = strtod(val, &end); return (end && !*end);
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#elif __SIZEOF_LONG_DOUBLE__ == 8
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case CONF_F64: *(f64 *)out = strtold(val, &end); return (end && !*end);
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#else
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#error double or long double are not 8 bytes wide
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#endif
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default: assert("invalid type");
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}
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return 0;
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}
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