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-rw-r--r--memdump/strtoul.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/memdump/strtoul.c b/memdump/strtoul.c
new file mode 100644
index 00000000..cd09d3d0
--- /dev/null
+++ b/memdump/strtoul.c
@@ -0,0 +1,72 @@
+/*
+ * strtoul.c
+ *
+ */
+
+#include "mystuff.h"
+
+static inline int isspace(int c)
+{
+ return (c <= ' '); /* Close enough */
+}
+
+static inline int digitval(int ch)
+{
+ if (ch >= '0' && ch <= '9') {
+ return ch - '0';
+ } else if (ch >= 'A' && ch <= 'Z') {
+ return ch - 'A' + 10;
+ } else if (ch >= 'a' && ch <= 'z') {
+ return ch - 'a' + 10;
+ } else {
+ return -1;
+ }
+}
+
+unsigned long strtoul(const char *nptr, char **endptr, int base)
+{
+ int minus = 0;
+ unsigned long v = 0;
+ int d;
+
+ while (isspace((unsigned char)*nptr)) {
+ nptr++;
+ }
+
+ /* Single optional + or - */
+ {
+ char c = *nptr;
+ if (c == '-' || c == '+') {
+ minus = (c == '-');
+ nptr++;
+ }
+ }
+
+ if (base == 0) {
+ if (nptr[0] == '0' &&
+ (nptr[1] == 'x' || nptr[1] == 'X')) {
+ nptr += 2;
+ base = 16;
+ } else if (nptr[0] == '0') {
+ nptr++;
+ base = 8;
+ } else {
+ base = 10;
+ }
+ } else if (base == 16) {
+ if (nptr[0] == '0' &&
+ (nptr[1] == 'x' || nptr[1] == 'X')) {
+ nptr += 2;
+ }
+ }
+
+ while ((d = digitval(*nptr)) >= 0 && d < base) {
+ v = v * base + d;
+ nptr++;
+ }
+
+ if (endptr)
+ *endptr = (char *)nptr;
+
+ return minus ? -v : v;
+}