Change in coreboot[master]: string: implement strspn, strcspn, atol

[Martin Roth (Code Review)]

Martin Roth has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/34450 )

Change subject: string: implement strspn, strcspn, atol
......................................................................

string: implement strspn, strcspn, atol

Change-Id: Id8fa880357124b620bde8884949bd8ffff7d0762
Signed-off-by: Patrick Georgi 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34450
Tested-by: build bot (Jenkins) 
Reviewed-by: Julius Werner 
---
M src/include/string.h
M src/lib/string.c
2 files changed, 55 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Julius Werner: Looks good to me, approved

diff --git a/src/include/string.h b/src/include/string.h
index 3024130..d3f09ff 100644
--- a/src/include/string.h
+++ b/src/include/string.h
@@ -32,6 +32,9 @@
 char *strcpy(char *dst, const char *src);
 int strcmp(const char *s1, const char *s2);
 int strncmp(const char *s1, const char *s2, int maxlen);
+int strspn(const char *str, const char *spn);
+int strcspn(const char *str, const char *spn);
+long atol(const char *str);

/**
  * Find a character in a string.
diff --git a/src/lib/string.c b/src/lib/string.c
index eb6adb6..f0c24ed 100644
--- a/src/lib/string.c
+++ b/src/lib/string.c
@@ -132,3 +132,55 @@
    	i = i*10 + *((*s)++) - '0';
    return i;
 }
+
+int strspn(const char *str, const char *spn)
+{
+	int ret = 0;
+
+	while (*str != 0) {
+		const char *p;
+		for (p = spn; *str != *p; p++)
+			if (*p == '\0')
+				return ret;
+		ret++;
+		str++;
+	}
+	return ret;
+}
+
+int strcspn(const char *str, const char *spn)
+{
+	int ret = 0;
+
+	while (*str != 0) {
+		const char *p;
+		for (p = spn; *p != '\0'; p++)
+			if (*p == *str)
+				return ret;
+		ret++;
+		str++;
+	}
+	return ret;
+}
+
+long atol(const char *str)
+{
+	long ret = 0;
+	long sign = 1;
+
+	str += strspn(str, " \t\n\r\f\v");
+
+	if (*str == '+') {
+		sign = 1;
+		str++;
+	} else if (*str == '-') {
+		sign = -1;
+		str++;
+	}
+
+	while (isdigit(*str)) {
+		ret *= 10;
+		ret += *str++ - '0';
+	}
+	return ret * sign;
+}