[READ-ONLY] Mirror of https://github.com/bombshell-dev/tty. Platform independent 2D layout engine for terminal applications based on Clay
🧱 extract mem.c/h shims for memcpy/memset
Use explicit byte-loop implementations instead of __builtin_mem*
to avoid infinite recursion when clang lowers builtins back to
libc calls on some versions.
Charles Lowell
(Mar 16, 2026, 7:00 PM -0500)
455fdb63
9fd96bdf
+35
-10
+1
-8
src/buffer.c
+1
-8
src/buffer.c
···
1
1
/* buffer.c — fixed-capacity byte buffer */
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2
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3
#include "buffer.h"
4
+
#include "mem.h"
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#include "utf8.h"
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-
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-
typedef __SIZE_TYPE__ size_t;
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-
8
-
void *memcpy(void *dst, const void *src, size_t n) {
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-
return __builtin_memcpy(dst, src, n);
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-
}
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-
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void *memset(void *dst, int c, size_t n) { return __builtin_memset(dst, c, n); }
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6
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static size_t strlen(const char *s) {
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8
size_t n = 0;
+2
-1
src/clayterm.c
+2
-1
src/clayterm.c
···
13
13
#include "../clay/clay.h"
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14
#include "buffer.h"
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#include "cell.h"
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+
#include "mem.h"
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#include "utf8.h"
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#include "wcwidth.h"
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···
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291
static float rdf(uint32_t *buf, int len, int *i) {
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uint32_t v = rd(buf, len, i);
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float f;
293
-
__builtin_memcpy(&f, &v, 4);
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+
memcpy(&f, &v, 4);
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return f;
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}
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297
+18
src/mem.c
+18
src/mem.c
···
1
+
/* mem.c — memcpy/memset shims for freestanding wasm32 */
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+
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+
#include "mem.h"
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+
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+
void *memcpy(void *dst, const void *src, size_t n) {
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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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+
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+
void *memset(void *dst, int c, size_t n) {
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+
unsigned char *d = (unsigned char *)dst;
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+
while (n--)
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+
*d++ = (unsigned char)c;
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+
return dst;
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+
}
+11
src/mem.h
+11
src/mem.h