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authorJannis Hoffmann <jannis@fehcom.de>2024-07-09 13:58:20 +0200
committerJannis Hoffmann <jannis@fehcom.de>2024-07-09 13:58:20 +0200
commit249866e3d1e11dc72eaa1305f4bb479ded92ef38 (patch)
tree7118c5f58e29fe61c100e4d067bb90ba8d52589e /src/byte.c
parent96cf8dffe4f7b0b910f790066ae622dc429eb522 (diff)
reorganized file structure
Moved c files into src/. Corrected VERSION file. Removed BUILD and FILES.
Diffstat (limited to 'src/byte.c')
-rw-r--r--src/byte.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/src/byte.c b/src/byte.c
new file mode 100644
index 0000000..c9d6d23
--- /dev/null
+++ b/src/byte.c
@@ -0,0 +1,99 @@
+#include "byte.h"
+
+/**
+ @file byte.c
+ @author djb
+ @brief byte manipulation functions
+*/
+
+unsigned int byte_chr(char *s,register unsigned int n,int c)
+{
+ register char ch;
+ register char *t;
+
+ ch = c;
+ t = s;
+ for (;;) {
+ if (!n) { break; } if (*t == ch) { break; } ++t; --n;
+ if (!n) { break; } if (*t == ch) { break; } ++t; --n;
+ if (!n) { break; } if (*t == ch) { break; } ++t; --n;
+ if (!n) { break; } if (*t == ch) { break; } ++t; --n;
+ }
+ return t - s;
+}
+
+void byte_copy(register char *to,register unsigned int n,register char *from)
+{
+ for (;;) {
+ if (!n) { return; } *to++ = *from++; --n;
+ if (!n) { return; } *to++ = *from++; --n;
+ if (!n) { return; } *to++ = *from++; --n;
+ if (!n) { return; } *to++ = *from++; --n;
+ }
+}
+
+void byte_copyr(register char *to,register unsigned int n,register char *from)
+{
+ to += n;
+ from += n;
+ for (;;) {
+ if (!n) { return; } *--to = *--from; --n;
+ if (!n) { return; } *--to = *--from; --n;
+ if (!n) { return; } *--to = *--from; --n;
+ if (!n) { return; } *--to = *--from; --n;
+ }
+}
+
+int byte_diff(register char *s,register unsigned int n,register char *t)
+{
+ for (;;) {
+ if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
+ if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
+ if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
+ if (!n) { return 0; } if (*s != *t) { break; } ++s; ++t; --n;
+ }
+ return ((int)(unsigned int)(unsigned char) *s)
+ - ((int)(unsigned int)(unsigned char) *t);
+}
+
+unsigned int byte_rchr(char *s,register unsigned int n,int c)
+{
+ register char ch;
+ register char *t;
+ register char *u;
+
+ ch = c;
+ t = s;
+ u = 0;
+ for (;;) {
+ if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
+ if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
+ if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
+ if (!n) { break; } if (*t == ch) { u = t; } ++t; --n;
+ }
+ if (!u) { u = t; }
+ return u - s;
+}
+
+void byte_zero(char *s,register unsigned int n)
+{
+ for (;;) {
+ if (!n) { break; } *s++ = 0; --n;
+ if (!n) { break; } *s++ = 0; --n;
+ if (!n) { break; } *s++ = 0; --n;
+ if (!n) { break; } *s++ = 0; --n;
+ }
+}
+
+void byte_fill(char *s,register unsigned int n,const int c)
+{
+ register char ch;
+
+ ch = c;
+ for (;;) {
+ if (!n) { break; } *s++ = ch; --n;
+ if (!n) { break; } *s++ = ch; --n;
+ if (!n) { break; } *s++ = ch; --n;
+ if (!n) { break; } *s++ = ch; --n;
+ }
+}