diff --git a/lib/libc/core/stdlib/strtoimax.c b/lib/libc/core/stdlib/strtoimax.c new file mode 100644 index 0000000..97aabfc --- /dev/null +++ b/lib/libc/core/stdlib/strtoimax.c @@ -0,0 +1,103 @@ +/* + * Copyright (c) 1990 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. [rescinded 22 July 1999] + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +#include +#include +#include + +intmax_t strtoimax( + const char *restrict ptr, + char **restrict endptr, + register int base) +{ + const char *s = ptr; + intmax_t acc; + int c; + intmax_t cutoff; + int neg = 0, any, cutlim; + + do { + c = *s++; + } while (isspace(c)); + + if (c == '-') { + neg = 1; + c = *s++; + } else if (c == '+') { + c = *s++; + } + + if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) { + c = s[1]; + s += 2; + base = 16; + } + + if (base == 0) { + base = c == '0' ? 8 : 10; + } + + cutoff = (intmax_t)INTMAX_MAX / (intmax_t)base; + cutlim = (intmax_t)INTMAX_MAX % (intmax_t)base; + for (acc = 0, any = 0;; c = *s++) { + if (isdigit(c)) { + c -= '0'; + } else if (isalpha(c)) { + c -= isupper(c) ? 'A' - 10 : 'a' - 10; + } else { + break; + } + + if (c >= base) { + break; + } + + if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) { + any = -1; + } else { + any = 1; + acc *= base; + acc += c; + } + } + if (any < 0) { + acc = INTMAX_MAX; + __set_errno(ERANGE); + } else if (neg) { + acc = -acc; + } + + if (endptr != 0) { + *endptr = (char *)(any ? s - 1 : ptr); + } + + return (acc); +} diff --git a/lib/libc/core/stdlib/strtoumax.c b/lib/libc/core/stdlib/strtoumax.c new file mode 100644 index 0000000..755c972 --- /dev/null +++ b/lib/libc/core/stdlib/strtoumax.c @@ -0,0 +1,103 @@ +/* + * Copyright (c) 1990 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. [rescinded 22 July 1999] + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +#include +#include +#include + +uintmax_t strtoumax( + const char *restrict ptr, + char **restrict endptr, + register int base) +{ + const char *s = ptr; + uintmax_t acc; + int c; + uintmax_t cutoff; + int neg = 0, any, cutlim; + + do { + c = *s++; + } while (isspace(c)); + + if (c == '-') { + neg = 1; + c = *s++; + } else if (c == '+') { + c = *s++; + } + + if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) { + c = s[1]; + s += 2; + base = 16; + } + + if (base == 0) { + base = c == '0' ? 8 : 10; + } + + cutoff = (uintmax_t)UINTMAX_MAX / (uintmax_t)base; + cutlim = (uintmax_t)UINTMAX_MAX % (uintmax_t)base; + for (acc = 0, any = 0;; c = *s++) { + if (isdigit(c)) { + c -= '0'; + } else if (isalpha(c)) { + c -= isupper(c) ? 'A' - 10 : 'a' - 10; + } else { + break; + } + + if (c >= base) { + break; + } + + if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) { + any = -1; + } else { + any = 1; + acc *= base; + acc += c; + } + } + if (any < 0) { + acc = UINTMAX_MAX; + __set_errno(ERANGE); + } else if (neg) { + acc = -acc; + } + + if (endptr != 0) { + *endptr = (char *)(any ? s - 1 : ptr); + } + + return (acc); +} diff --git a/lib/libc/include/stdlib.h b/lib/libc/include/stdlib.h index 5ad820a..bef2fae 100644 --- a/lib/libc/include/stdlib.h +++ b/lib/libc/include/stdlib.h @@ -2,6 +2,7 @@ #define STDLIB_H_ #include +#include extern void abort(void); extern void exit(int result); @@ -27,4 +28,16 @@ extern unsigned long long strtoull( char **restrict str_end, int base); +extern uintmax_t strtoumax( + const char *restrict str, + char **restrict endptr, + int base); +extern intmax_t strtoimax( + const char *restrict str, + char **restrict str_end, + int base); + +extern float strtof(const char *restrict str, char **restrict endptr); +extern double strtod(const char *restrict str, char **restrict endptr); + #endif