From 9695ea005d4af93dcd60f74f10fd3c54499a182f Mon Sep 17 00:00:00 2001 From: Nicholas Noll Date: Thu, 11 Nov 2021 16:31:58 -0800 Subject: chore: split up base library into individual files for smaller binaries --- sys/base/string/make.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 sys/base/string/make.c (limited to 'sys/base/string/make.c') diff --git a/sys/base/string/make.c b/sys/base/string/make.c new file mode 100644 index 0000000..eb71543 --- /dev/null +++ b/sys/base/string/make.c @@ -0,0 +1,53 @@ +#include "internal.h" + +// new returns a new dynamic string object, initialized from the given c string. +// len defines the length of the c substring that we will copy into our buffer. +// the backing buffer will have capacity cap. +string +str·makecap(const byte *s, vlong len, vlong cap) +{ + struct Hdr* h; + + h = malloc(sizeof(*h) + cap + 1); + if (s == nil) memset(h, 0, sizeof(*h)); + + if (h == nil) return nil; // Allocation failed. + + h->len = (s == nil) ? 0 : len; + h->cap = cap; + + if (cap < h->len) goto cleanup; + + if (s != nil && cap > 0) { + memcpy(h->buf, s, h->len); + memset(h->buf + h->len, '\0', h->cap - h->len + 1); + } + + return h->buf; + +cleanup: + free(h); + panicf("Attempted to create a string with less capacity than length"); + return nil; +} + +// new returns a new dynamic string object, initialized from the given c string. +// the backing buffer capacity is equivalent to the string length. +string +str·makelen(const byte *s, vlong len) +{ + vlong sl = (!s) ? 0 : strlen(s); + if (sl < len) panicf("attempted to take a bigger substring than string length"); + + vlong cap = (len == 0) ? 1 : len; + return str·makecap(s, len, cap); +} + +// new returns a new dynamic string object, initialized from the given c string. +// the backing buffer capacity is equivalent to the string length. +string +str·make(const byte *s) +{ + vlong len = (!s) ? 0 : strlen(s); + return str·makelen(s, len); +} -- cgit v1.2.1