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-rw-r--r--missing/strchr.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/missing/strchr.c b/missing/strchr.c
new file mode 100644
index 0000000..50714c9
--- /dev/null
+++ b/missing/strchr.c
@@ -0,0 +1,45 @@
+/*
+ * strchr --- search a string for a character
+ *
+ * We supply this routine for those systems that aren't standard yet.
+ */
+
+#include <stdio.h>
+
+char *
+strchr(str, c)
+register const char *str, c;
+{
+ if (c == '\0') {
+ /* thanks to Mike Brennan ... */
+ do {
+ if (*str == c)
+ return (char *) str;
+ } while (*str++);
+ } else {
+ for (; *str; str++)
+ if (*str == c)
+ return (char *) str;
+ }
+
+ return NULL;
+}
+
+/*
+ * strrchr --- find the last occurrence of a character in a string
+ *
+ * We supply this routine for those systems that aren't standard yet.
+ */
+
+char *
+strrchr(str, c)
+register const char *str, c;
+{
+ register const char *save = NULL;
+
+ for (; *str; str++)
+ if (*str == c)
+ save = str;
+
+ return (char *) save;
+}