mirror of
https://codeberg.org/libreboot/lbmk.git
synced 2026-03-25 21:39:03 +02:00
2ed8db3adc
handle init in xstatus() it's now a singleton design also tidied up some other code also removed todo.c. bloat. will do all those anyway. too much change. i just kept touching the code until it looked good Signed-off-by: Leah Rowe <leah@libreboot.org>
135 lines
2.5 KiB
C
135 lines
2.5 KiB
C
/* SPDX-License-Identifier: MIT
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*
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* Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
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*
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* String handling.
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*/
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#ifdef __OpenBSD__
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#include <sys/param.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "../include/common.h"
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/*
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* Portable strcmp() but blocks NULL/empty/unterminated
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* strings. Even stricter than strncmp().
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*/
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int
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xstrxcmp(const char *a, const char *b, unsigned long maxlen)
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{
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unsigned long i;
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if (a == NULL || b == NULL)
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err(EINVAL, "NULL input to xstrxcmp");
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if (*a == '\0' || *b == '\0')
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err(EINVAL, "Empty string in xstrxcmp");
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for (i = 0; i < maxlen; i++) {
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unsigned char ac = (unsigned char)a[i];
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unsigned char bc = (unsigned char)b[i];
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if (ac == '\0' || bc == '\0') {
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if (ac == bc)
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return 0;
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return ac - bc;
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}
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if (ac != bc)
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return ac - bc;
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}
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/*
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* We reached maxlen, so assume unterminated string.
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*/
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err(EINVAL, "Unterminated string in xstrxcmp");
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/*
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* Should never reach here. This keeps compilers happy.
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*/
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errno = EINVAL;
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return -1;
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}
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/*
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* strnlen() but aborts on NULL input, and empty strings.
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* Our version also prohibits unterminated strings.
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* strnlen() was standardized in POSIX.1-2008 and is not
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* available on some older systems, so we provide our own.
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*/
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unsigned long
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xstrxlen(const char *scmp, unsigned long maxlen)
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{
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unsigned long xstr_index;
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if (scmp == NULL)
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err(EINVAL, "NULL input to xstrxlen");
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if (*scmp == '\0')
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err(EINVAL, "Empty string in xstrxlen");
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for (xstr_index = 0;
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xstr_index < maxlen && scmp[xstr_index] != '\0';
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xstr_index++);
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if (xstr_index == maxlen)
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err(EINVAL, "Unterminated string in xstrxlen");
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return xstr_index;
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}
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char *
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x_c_strrchr(const char *s, int c)
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{
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const char *p = NULL;
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for ( ; *s; s++)
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if (*s == (char)c)
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p = s;
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if (c == '\0')
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return (char *)s;
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return (char *)p;
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}
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void *
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x_v_memcpy(void *dst, const void *src, unsigned long n)
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{
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unsigned char *d = (unsigned char *)dst;
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const unsigned char *s = (const unsigned char *)src;
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while (n--)
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*d++ = *s++;
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return dst;
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}
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int
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x_i_memcmp(const void *a, const void *b, unsigned long n)
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{
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const unsigned char *pa = (const unsigned char *)a;
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const unsigned char *pb = (const unsigned char *)b;
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for ( ; n--; ++pa, ++pb)
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if (*pa != *pb)
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return *pa - *pb;
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return 0;
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}
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