14 files changed, 771 insertions, 0 deletions
diff --git a/zap/src/fastimpl.c b/zap/src/fastimpl.c
new file mode 100644
index 0000000..71ded00
--- /dev/null
+++ b/zap/src/fastimpl.c
@@ -0,0 +1,16 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+bool const zap_fastimpl = true;
+#else
+bool const zap_fastimpl = false;
+#endif
diff --git a/zap/src/fndbyte.c b/zap/src/fndbyte.c
new file mode 100644
index 0000000..85fc14d
--- /dev/null
+++ b/zap/src/fndbyte.c
@@ -0,0 +1,77 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_fndbyte\n"
+
+ "zap_fndbyte:\n"
+ /*
+ void const * ptr
+ size_t num
+ uint_least8_t byte
+ */
+#if defined(sus_arch_amd64)
+ /* rax: Address of the current element. */
+ "movq %rdi,%rax\n"
+ /* rsi: Address of the element after the last element. */
+ "addq %rdi,%rsi\n"
+ /* rcx: Current element. */
+ ".loop:\n"
+ "cmpq %rax,%rsi\n"
+ "je .nfnd\n" /* We have went through the entire array without finding the byte. */
+ "movb (%rax),%cl\n"
+ "cmpb %cl,%dl\n"
+ "je .fnd\n" /* We have found the byte. */
+ "incq %rax\n"
+ "jmp .loop\n"
+ ".fnd:\n"
+ "subq %rdi,%rax\n"
+ "ret\n"
+ ".nfnd:\n"
+ "movq $0xFFFFFFFFFFFFFFFF,%rax\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current element. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Address of the element after the last element. */
+ "movl 0x8(%esp),%ecx\n"
+ "addl %eax,%ecx\n"
+ /* edx: Byte value. */
+ "movb 0xC(%esp),%dl\n"
+ /* ebx: Current element. */
+ "pushl %ebx\n"
+ ".loop:\n"
+ "cmpl %eax,%ecx\n"
+ "je .nfnd\n" /* We have went through the entire array without finding the byte. */
+ "movb (%eax),%bl\n"
+ "cmpb %bl,%dl\n"
+ "je .fnd\n" /* We have found the byte. */
+ "incl %eax\n"
+ "jmp .loop\n"
+ ".fnd:\n"
+ "popl %ebx\n"
+ "subl 0x4(%esp),%eax\n"
+ "ret\n"
+ ".nfnd:\n"
+ "popl %ebx\n"
+ "movl $0xFFFFFFFF,%eax\n"
+ "ret\n"
+#endif
+);
+#else
+size_t zap_fndbyte(void const * const _ptr,size_t const _num,uint_least8_t const _byte) {
+ uint_least8_t const * ptr = (uint_least8_t const *)_ptr;
+ uint_least8_t const * const afterbuf = ptr + _num;
+ for (;ptr != afterbuf;++ptr) {sus_unlikely (*ptr == _byte) {return ptr - (uint_least8_t const *)_ptr;}}
+ return zap_typlit_usz(-0x1);
+}
+#endif
diff --git a/zap/src/fndchr.c b/zap/src/fndchr.c
new file mode 100644
index 0000000..cd5458f
--- /dev/null
+++ b/zap/src/fndchr.c
@@ -0,0 +1,71 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_fndchr\n"
+
+ "zap_fndchr:\n"
+ /*
+ char const * str
+ char chr
+ */
+#if defined(sus_arch_amd64)
+ /* rax: Address of the current character. */
+ "movq %rdi,%rax\n"
+ /* rdx: Current character. */
+ ".loop:\n"
+ "movb (%rax),%dl\n"
+ "cmpb %dl,%sil\n"
+ "je .fnd\n" /* Exit loop if we have found the character. */
+ "testb %dl,%dl\n"
+ "je .nfnd\n" /* We encountered the null-terminator but not the specified character. */
+ "incq %rax\n"
+ "jmp .loop\n"
+ ".fnd:\n"
+ "subq %rdi,%rax\n"
+ "ret\n"
+ ".nfnd:\n"
+ "movq $0xFFFFFFFFFFFFFFFF,%rax\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current character. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Character. */
+ "movb 0x8(%esp),%cl\n"
+ /* edx: Current character. */
+ ".loop:\n"
+ "movb (%eax),%dl\n"
+ "cmpb %dl,%cl\n"
+ "je .fnd\n" /* Exit loop if we have found the character. */
+ "testb %dl,%dl\n"
+ "je .nfnd\n" /* We encountered the null-terminator but not the specified character. */
+ "incl %eax\n"
+ "jmp .loop\n"
+ ".fnd:\n"
+ "subl 0x4(%esp),%eax\n"
+ "ret\n"
+ ".nfnd:\n"
+ "movl $0xFFFFFFFF,%eax\n"
+ "ret\n"
+#endif
+);
+#else
+size_t zap_fndchr(char const * const _str,char const _chr) {
+ char const * pos = _str;
+ for (;;++pos) {
+ char const chr = *pos;
+ sus_unlikely (chr == _chr) {return (size_t)(pos - _str);}
+ sus_unlikely (chr == '\x0') {return zap_typlit_usz(-0x1);}
+ }
+ sus_unreach();
+}
+#endif
diff --git a/zap/src/memcmp.c b/zap/src/memcmp.c
new file mode 100644
index 0000000..810bab0
--- /dev/null
+++ b/zap/src/memcmp.c
@@ -0,0 +1,21 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+
+int_least8_t zap_memcmp(void const * const _lstr,size_t const _num,void const * const _rstr) {
+ unsigned char const * lpos = (unsigned char const *)_lstr;
+ unsigned char const * rpos = (unsigned char const *)_rstr;
+ unsigned char const * const afterlbuf = lpos + _num;
+ for (;lpos != afterlbuf;++lpos,++rpos) {
+ unsigned char const lbyte = *lpos;
+ unsigned char const rbyte = *rpos;
+ sus_likely (lbyte != rbyte) {return lbyte < rbyte ? (int_least8_t)INT8_MIN : (int_least8_t)INT8_MAX;}
+ }
+ return zap_typlit_s8(0x0);
+}
diff --git a/zap/src/memcpy.c b/zap/src/memcpy.c
new file mode 100644
index 0000000..1b40832
--- /dev/null
+++ b/zap/src/memcpy.c
@@ -0,0 +1,141 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_memcpy\n"
+
+ "zap_memcpy:\n"
+ /*
+ void const * in
+ size_t num
+ void * out
+ */
+#if defined(sus_arch_amd64)
+ /* rdi: Address of the current input element. */
+ /* rsi: Number of remaining elements. */
+ /* rdx: Address of the current output element. */
+ /* rcx: Current element. */
+ /* xmm0: Current element. */
+ /* ymm0: Current element. */
+#if defined(sus_archfeat_avx)
+ ".big256cpy:\n"
+ "cmpq $0x20,%rsi\n"
+ "jl .big128cpy\n"
+ "vmovups (%rdi),%ymm0\n"
+ "vmovups %ymm0,(%rdx)\n"
+ "addq $0x20,%rdi\n"
+ "addq $0x20,%rdx\n"
+ "subq $0x20,%rsi\n"
+ "jmp .big256cpy\n"
+#endif
+ ".big128cpy:\n"
+ "cmpq $0x10,%rsi\n"
+ "jl .wrdcpy\n"
+ "movdqu (%rdi),%xmm0\n"
+ "movdqu %xmm0,(%rdx)\n"
+ "addq $0x10,%rdi\n"
+ "addq $0x10,%rdx\n"
+ "subq $0x10,%rsi\n"
+ "jmp .big128cpy\n"
+ ".wrdcpy:\n"
+ "cmpq $0x8,%rsi\n"
+ "jl .bytecpy\n"
+ "movq (%rdi),%rcx\n"
+ "movq %rcx,(%rdx)\n"
+ "addq $0x8,%rdi\n"
+ "addq $0x8,%rdx\n"
+ "subq $0x8,%rsi\n"
+ "jmp .wrdcpy\n"
+ ".bytecpy:\n"
+ "testq %rsi,%rsi\n"
+ "jz .done\n"
+ "movb (%rdi),%cl\n"
+ "movb %cl,(%rdx)\n"
+ "incq %rdi\n"
+ "incq %rdx\n"
+ "decq %rsi\n"
+ "jmp .bytecpy\n"
+ ".done:\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current input element. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Number of remaining elements. */
+ "movl 0x8(%esp),%ecx\n"
+ /* edx: Address of the current output element. */
+ "movl 0xC(%esp),%edx\n"
+ /* ebx: Current element. */
+ "pushl %ebx\n" /* ebx must be restored. */
+ /* xmm0: Current element. */
+ /* ymm0: Current element. */
+#if defined(sus_archfeat_avx)
+ ".big256cpy:\n"
+ "cmpl $0x20,%ecx\n"
+#if defined(sus_archfeat_sse)
+ "jl .big128cpy\n"
+#else
+ "jl .wrdcpy\n"
+#endif
+ "vmovdqu (%eax),%ymm0\n"
+ "vmovdqu %ymm0,(%edx)\n"
+ "addl $0x20,%eax\n"
+ "addl $0x20,%edx\n"
+ "subl $0x20,%ecx\n"
+ "jmp .big256cpy\n"
+#endif
+#if defined(sus_archfeat_sse)
+ ".big128cpy:\n"
+ "cmpl $0x10,%ecx\n"
+ "jl .wrdcpy\n"
+#if defined(sus_archfeat_sse2)
+ "movdqu (%eax),%xmm0\n"
+ "movdqu %xmm0,(%edx)\n"
+#else
+ "movups (%eax),%xmm0\n"
+ "movups %xmm0,(%edx)\n"
+#endif
+ "addl $0x10,%eax\n"
+ "addl $0x10,%edx\n"
+ "subl $0x10,%ecx\n"
+ "jmp .big128cpy\n"
+#endif
+ ".wrdcpy:\n"
+ "cmpl $0x4,%ecx\n"
+ "jl .bytecpy\n"
+ "movl (%eax),%ebx\n"
+ "movl %ebx,(%edx)\n"
+ "addl $0x4,%eax\n"
+ "addl $0x4,%edx\n"
+ "subl $0x4,%ecx\n"
+ "jmp .wrdcpy\n"
+ ".bytecpy:\n"
+ "testl %ecx,%ecx\n"
+ "jz .done\n"
+ "movb (%eax),%bl\n"
+ "movb %bl,(%edx)\n"
+ "incl %eax\n"
+ "incl %edx\n"
+ "decl %ecx\n"
+ "jmp .bytecpy\n"
+ ".done:\n"
+ "popl %ebx\n"
+ "ret\n"
+#endif
+);
+#else
+void zap_memcpy(void const * const _in,size_t const _num,void * const _out) {
+ uint_least8_t const * in = (uint_least8_t const *)_in;
+ uint_least8_t * out = (uint_least8_t *)_out;
+ uint_least8_t const * const afterbuf = in + _num;
+ for (;in != afterbuf;++in,++out) {*out = *in;}
+}
+#endif
diff --git a/zap/src/memdup.c b/zap/src/memdup.c
new file mode 100644
index 0000000..3670eb3
--- /dev/null
+++ b/zap/src/memdup.c
@@ -0,0 +1,22 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdlib.h>
+
+void * zap_memdup(sus_attr_unused void const * const _ptr,sus_attr_unused size_t const _num) {
+#if !defined(zap_priv_nostdlib)
+ void * const dup = malloc(_num);
+ sus_unlikely (dup == NULL) {return NULL;}
+ zap_memcpy(_ptr,_num,dup);
+ return dup;
+#else
+ return NULL;
+#endif
+}
+
+
diff --git a/zap/src/memeq.c b/zap/src/memeq.c
new file mode 100644
index 0000000..f9717ad
--- /dev/null
+++ b/zap/src/memeq.c
@@ -0,0 +1,110 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_memeq\n"
+
+ "zap_memeq:\n"
+ /*
+ void const * lptr
+ size_t num
+ void const * rptr
+ */
+#if defined(sus_arch_amd64)
+ /* rdi: Address of the current left element. */
+ /* rsi: Number of remaining elements. */
+ /* rdx: Address of the current right element. */
+ /* rax: Current left element. */
+ /* rcx: Current right element. */
+ ".wrdcmp:\n"
+ "cmpq $0x8,%rsi\n"
+ "jl .bytecmp\n"
+ "movq (%rdi),%rax\n"
+ "movq (%rdx),%rcx\n"
+ "cmpq %rax,%rcx\n"
+ "jne .neq\n"
+ "addq $0x8,%rdi\n"
+ "addq $0x8,%rdx\n"
+ "subq $0x8,%rsi\n"
+ "jmp .wrdcmp\n"
+ ".bytecmp:\n"
+ "testq %rsi,%rsi\n"
+ "jne .eq\n" /* If we have reached the final element, all previous elements have compared equal, and the memory sequences are equal. */
+ "movb (%rdi),%al\n"
+ "movb (%rdx),%cl\n"
+ "cmpb %al,%cl\n"
+ "jne .neq\n"
+ "incq %rdi\n"
+ "incq %rdx\n"
+ "decq %rsi\n"
+ "jmp .bytecmp\n"
+ ".eq:\n"
+ "movb $0x1,%al\n"
+ "ret\n"
+ ".neq:\n"
+ "movb $0x0,%al\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current left element. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Number of remaining elements. */
+ "movl 0x8(%esp),%ecx\n"
+ /* edx: Address of the current right element. */
+ "movl 0xC(%esp),%edx\n"
+ /* ebx: Current left element. */
+ "pushl %ebx\n"
+ /* ebx/esi: Current right element. */
+ "pushl %esi\n"
+ ".wrdcmp:\n"
+ "cmpl $0x4,%ecx\n"
+ "jl .bytecmp\n"
+ "movl (%eax),%ebx\n"
+ "movl (%edx),%esi\n"
+ "cmpl %ebx,%esi\n"
+ "jne .neq\n"
+ "addl $0x4,%eax\n"
+ "addl $0x4,%edx\n"
+ "subl $0x4,%ecx\n"
+ "jmp .wrdcmp\n"
+ ".bytecmp:\n"
+ "testl %ecx,%ecx\n"
+ "jne .eq\n" /* If we have reached the final element, all previous elements have compared equal, and the memory sequences are equal. */
+ "movb (%eax),%bl\n"
+ "movb (%edx),%bh\n"
+ "cmpb %bl,%bh\n"
+ "jne .neq\n"
+ "incl %eax\n"
+ "incl %edx\n"
+ "decl %ecx\n"
+ "jmp .bytecmp\n"
+ ".eq:\n"
+ "popl %ebx\n"
+ "popl %esi\n"
+ "movb $0x1,%al\n"
+ "ret\n"
+ ".neq:\n"
+ "popl %ebx\n"
+ "popl %esi\n"
+ "movb $0x0,%al\n"
+ "ret\n"
+#endif
+);
+#else
+bool zap_memeq(void const * const _lptr,size_t const _num,void const * const _rptr) {
+ uint_least8_t const * lpos = (uint_least8_t const *)_lptr;
+ uint_least8_t const * rpos = (uint_least8_t const *)_rptr;
+ uint_least8_t const * const afterbuf = lpos + _num;
+ for (;lpos != afterbuf;++lpos,++rpos) {sus_likely (*lpos != *rpos) {return false;}}
+ return true;
+}
+#endif
diff --git a/zap/src/memfill.c b/zap/src/memfill.c
new file mode 100644
index 0000000..70982c4
--- /dev/null
+++ b/zap/src/memfill.c
@@ -0,0 +1,58 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_memfill\n"
+
+ "zap_memfill:\n"
+ /*
+ void const * ptr
+ size_t num
+ uint_least8_t val
+ */
+#if defined(sus_arch_amd64)
+ /* rdi: Address of the current element. */
+ /* rsi: Address of the element after the last element. */
+ "addq %rdi,%rsi\n"
+ ".loop:\n"
+ "cmpq %rsi,%rdi\n"
+ "je .done\n" /* Exit loop if we have reached the final element. */
+ "movb %dl,(%rdi)\n"
+ "incq %rdi\n"
+ "jmp .loop\n" /* Continue to next element. */
+ ".done:\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current element. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Address of the element after the last element. */
+ "movl 0x4(%esp),%ecx\n"
+ "addl 0x8(%esp),%ecx\n"
+ /* edx: Byte value. */
+ "movb 0xC(%esp),%dl\n"
+ ".loop:\n"
+ "cmpl %eax,%ecx\n"
+ "je .done\n" /* Exit loop if we have reached the final element. */
+ "movb %dl,(%eax)\n"
+ "incl %eax\n"
+ "jmp .loop\n" /* Continue to next element. */
+ ".done:\n"
+ "ret\n"
+#endif
+);
+#else
+void zap_memfill(void * const _ptr,size_t const _num,uint_least8_t const _byte) {
+ uint_least8_t * pos = (uint_least8_t *)_ptr;
+ uint_least8_t * const afterbuf = pos + _num;
+ for (;pos != afterbuf;++pos) {*pos = _byte;}
+}
+#endif
diff --git a/zap/src/strcmp.c b/zap/src/strcmp.c
new file mode 100644
index 0000000..9e11601
--- /dev/null
+++ b/zap/src/strcmp.c
@@ -0,0 +1,21 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdint.h>
+
+int_least8_t zap_strcmp(char const * const _lstr,char const * const _rstr) {
+ unsigned char const * lpos = (unsigned char const *)_lstr;
+ unsigned char const * rpos = (unsigned char const *)_rstr;
+ for (;;++lpos,++rpos) {
+ unsigned char const lchr = *lpos;
+ unsigned char const rchr = *rpos;
+ sus_likely (lchr != rchr) {return lchr < rchr ? (int_least8_t)INT8_MIN : (int_least8_t)INT8_MAX;}
+ sus_unlikely (lchr == (unsigned char)0x0) {return zap_typlit_s8(0x0);}
+ }
+ sus_unreach();
+}
diff --git a/zap/src/strcpy.c b/zap/src/strcpy.c
new file mode 100644
index 0000000..3dc3e0f
--- /dev/null
+++ b/zap/src/strcpy.c
@@ -0,0 +1,69 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_strcpy\n"
+
+ "zap_strcpy:\n"
+ /*
+ char const * in
+ char const * out
+ */
+#if defined(sus_arch_amd64)
+ /* rax: Address of the current input character. */
+ "movq %rdi,%rax\n"
+ /* rsi: Address of the current output character. */
+ "movq %rsi,%rsi\n"
+ /* rdx: Current character. */
+ ".loop:\n"
+ "movb (%rax),%dl\n" /* Move current the character into a register... */
+ "movb %dl,(%rsi)\n" /* ... and then back into memory. */
+ "testb %dl,%dl\n" /* Check if we have reached the null-terminator... */
+ "jz .done\n" /* ... and if so, we are finished copying. */
+ "incq %rax\n" /* Increment the positions. */
+ "incq %rsi\n"
+ "jmp .loop\n" /* Restart the loop. */
+ ".done:\n"
+ "subq %rdi,%rax\n" /* Get the length of the string we copyied. */
+ "decq %rdi\n" /* We do not count the null-terminator in the string length. */
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current input character. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Address of the current output character. */
+ "movl 0x8(%esp),%ecx\n"
+ /* edx: Current character. */
+ ".loop:\n"
+ "movb (%eax),%dl\n" /* Move current the character into a register... */
+ "movb %dl,(%ecx)\n" /* ... and then back into memory. */
+ "testb %dl,%dl\n" /* Check if we have reached the null-terminator... */
+ "jz .done\n" /* ... and if so, we are finished copying. */
+ "incl %eax\n" /* Increment the positions. */
+ "incl %ecx\n"
+ "jmp .loop\n" /* Restart the loop. */
+ ".done:\n"
+ "subl 0x4(%esp),%eax\n" /* Get the length of the string we copyied. */
+ "decl %ecx \n" /* We do not count the null-terminator in the string length. */
+ "ret\n"
+#endif
+);
+#else
+size_t zap_strcpy(char const * const _in,char * const _out) {
+ char const * inpos = _in;
+ char * outpos = _out;
+ for (;;++inpos,++outpos) {
+ char const chr = *inpos;
+ *outpos = chr;
+ if (chr == '\x0') {return (size_t)(inpos - _in);}
+ }
+ sus_unreach();
+}
+#endif
diff --git a/zap/src/strdup.c b/zap/src/strdup.c
new file mode 100644
index 0000000..785a93b
--- /dev/null
+++ b/zap/src/strdup.c
@@ -0,0 +1,17 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdlib.h>
+
+char * zap_strdup(sus_attr_unused char const * const _str) {
+#if !defined(zap_priv_nostdlib)
+ return zap_memdup(_str,zap_strlen(_str) + zap_typlit_usz(0x1));
+#else
+ return NULL;
+#endif
+}
diff --git a/zap/src/streq.c b/zap/src/streq.c
new file mode 100644
index 0000000..6425ef7
--- /dev/null
+++ b/zap/src/streq.c
@@ -0,0 +1,81 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_streq\n"
+
+ "zap_streq:\n"
+ /*
+ char const * lstr
+ char const * rstr
+ */
+#if defined(sus_arch_amd64)
+ /* rax: Address of the current input character. */
+ "movq %rdi,%rax\n"
+ /* rsi: Address of the current output character. */
+ "movq %rsi,%rsi\n"
+ /* rdx: Current input character. */
+ /* rcx: Current output character. */
+ ".loop:\n"
+ "movb (%rax),%dl\n" /* Move the characters into registers. */
+ "movb (%rsi),%cl\n"
+ "cmpb %dl,%cl\n" /* Check if the characters are equal... */
+ "jne .neq\n" /* ... indicate inequality if they are not. */
+ "testb %dl,%dl\n" /* Check if we have reached the null-terminator... */
+ "jz .eq\n" /* ... indicate equality if we have. */
+ "incq %rax\n" /* Increment positions. */
+ "incq %rsi\n"
+ "jmp .loop\n" /* Restart loop. */
+ ".eq:\n" /* Indicate equality. */
+ "movb $0x1,%al\n"
+ "ret\n"
+ ".neq:\n" /* Indicate inequality. */
+ "movb $0x0,%al\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current input character. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Address of the current output character. */
+ "movl 0x8(%esp),%ecx\n"
+ /* edx: Current input character. */
+ /* edx: Current output character. */
+ ".loop:\n"
+ "movb (%eax),%dl\n" /* Move the characters into registers. */
+ "movb (%ecx),%dh\n"
+ "cmpb %dl,%dh\n" /* Check if the characters are equal... */
+ "jne .neq\n" /* ... indicate inequality if they are not. */
+ "testb %dl,%dl\n" /* Check if we have reached the null-terminator... */
+ "jz .eq\n" /* ... indicate equality if we have. */
+ "incl %eax\n" /* Increment positions. */
+ "incl %ecx\n"
+ "jmp .loop\n" /* Restart loop. */
+ ".eq:\n" /* Indicate equality. */
+ "movb $0x1,%al\n"
+ "ret\n"
+ ".neq:\n" /* Indicate inequality. */
+ "movb $0x0,%al\n"
+ "ret\n"
+#endif
+);
+#else
+bool zap_streq(char const * const _lstr,char const * const _rstr) {
+ char const * lpos = _lstr;
+ char const * rpos = _rstr;
+ for (;;++lpos,++rpos) {
+ char const lchr = *lpos;
+ char const rchr = *rpos;
+ sus_likely (lchr != rchr) {return false;}
+ if (lchr == '\x0') {return true;}
+ }
+ sus_unreach();
+}
+#endif
diff --git a/zap/src/strfill.c b/zap/src/strfill.c
new file mode 100644
index 0000000..a113094
--- /dev/null
+++ b/zap/src/strfill.c
@@ -0,0 +1,11 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stdint.h>
+
+void zap_strfill(char * const _str,char const _chr) {zap_memfill(_str,zap_strlen(_str),(uint_least8_t)_chr);}
diff --git a/zap/src/strlen.c b/zap/src/strlen.c
new file mode 100644
index 0000000..c1e8959
--- /dev/null
+++ b/zap/src/strlen.c
@@ -0,0 +1,56 @@
+/*
+ Copyright 2022 Gabriel Jensen.
+ This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+ If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+*/
+
+#include <zap/priv.h>
+
+#include <stddef.h>
+
+#if defined(zap_priv_fastimpl)
+__asm__ (
+ ".global zap_strlen\n"
+
+ "zap_strlen:\n"
+ /*
+ char const * str
+ */
+#if defined(sus_arch_amd64)
+ /* rax: Address of the current character. */
+ "movq %rdi,%rax\n"
+ /* rdx: Current character. */
+ ".loop:\n"
+ "movb (%rax),%dl\n"
+ "testb %dl,%dl\n"
+ "jz .done\n" /* Exit loop if we have reached the null-terminator. */
+ "incq %rax\n" /* Continue to the next character. */
+ "jmp .loop\n"
+ ".done:\n"
+ "subq %rdi,%rax\n"
+ "ret\n"
+#elif defined(sus_arch_ia32)
+ /* eax: Address of the current character. */
+ "movl 0x4(%esp),%eax\n"
+ /* ecx: Current character. */
+ ".loop:\n"
+ "movb (%eax),%cl\n"
+ "testb %cl,%cl\n"
+ "jz .done\n" /* Exit loop if we have reached the null-terminator. */
+ "incl %eax\n" /* Continue to the next character. */
+ "jmp .loop\n"
+ ".done:\n"
+ "subl 0x4(%esp),%eax\n"
+ "ret\n"
+#endif
+);
+#else
+size_t zap_strlen(char const * const _str) {
+ char const * pos = _str;
+ for (;;++pos) {
+ char const chr = *pos;
+ sus_unlikely (chr == '\x0') {return (size_t)(pos - _str);}
+ }
+ sus_unreach();
+}
+#endif