vsprintf: Move function documentation into header file

Now that this is not in common.h, perhaps it is acceptable to move this
documentation into the header file.

Signed-off-by: Simon Glass <sjg@chromium.org>

2 files changed, 123 insertions, 100 deletions

diff --git a/include/vsprintf.h b/include/vsprintf.h
index 5195598f9..651077ca4 100644
--- a/include/vsprintf.h
+++ b/include/vsprintf.h
@@ -25,23 +25,146 @@
 #define __VSPRINTF_H
 
 ulong simple_strtoul(const char *cp, char **endp, unsigned int base);
+
+/**
+ * strict_strtoul - convert a string to an unsigned long strictly
+ * @param cp	The string to be converted
+ * @param base	The number base to use
+ * @param res	The converted result value
+ * @return 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ *
+ * strict_strtoul converts a string to an unsigned long only if the
+ * string is really an unsigned long string, any string containing
+ * any invalid char at the tail will be rejected and -EINVAL is returned,
+ * only a newline char at the tail is acceptible because people generally
+ * change a module parameter in the following way:
+ *
+ *      echo 1024 > /sys/module/e1000/parameters/copybreak
+ *
+ * echo will append a newline to the tail.
+ *
+ * simple_strtoul just ignores the successive invalid characters and
+ * return the converted value of prefix part of the string.
+ *
+ * Copied this function from Linux 2.6.38 commit ID:
+ * 521cb40b0c44418a4fd36dc633f575813d59a43d
+ *
+ */
 int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
 unsigned long long simple_strtoull(const char *cp, char **endp,
 					unsigned int base);
 long simple_strtol(const char *cp, char **endp, unsigned int base);
 void panic(const char *fmt, ...)
 		__attribute__ ((format (__printf__, 1, 2), noreturn));
+
+/**
+ * Format a string and place it in a buffer
+ *
+ * @param buf	The buffer to place the result into
+ * @param fmt	The format string to use
+ * @param ...	Arguments for the format string
+ *
+ * The function returns the number of characters written
+ * into @buf.
+ *
+ * See the vsprintf() documentation for format string extensions over C99.
+ */
 int sprintf(char *buf, const char *fmt, ...)
 		__attribute__ ((format (__printf__, 2, 3)));
+
+/**
+ * Format a string and place it in a buffer (va_list version)
+ *
+ * @param buf	The buffer to place the result into
+ * @param size	The size of the buffer, including the trailing null space
+ * @param fmt	The format string to use
+ * @param args	Arguments for the format string
+ * @return the number of characters which have been written into
+ * the @buf not including the trailing '\0'. If @size is == 0 the function
+ * returns 0.
+ *
+ * If you're not already dealing with a va_list consider using scnprintf().
+ *
+ * See the vsprintf() documentation for format string extensions over C99.
+ */
 int vsprintf(char *buf, const char *fmt, va_list args);
 char *simple_itoa(ulong i);
 
 #ifdef CONFIG_SYS_VSNPRINTF
+/**
+ * Format a string and place it in a buffer
+ *
+ * @param buf	The buffer to place the result into
+ * @param size	The size of the buffer, including the trailing null space
+ * @param fmt	The format string to use
+ * @param ...	Arguments for the format string
+ * @return the number of characters which would be
+ * generated for the given input, excluding the trailing null,
+ * as per ISO C99.  If the return is greater than or equal to
+ * @size, the resulting string is truncated.
+ *
+ * See the vsprintf() documentation for format string extensions over C99.
+ */
 int snprintf(char *buf, size_t size, const char *fmt, ...)
 		__attribute__ ((format (__printf__, 3, 4)));
+
+/**
+ * Format a string and place it in a buffer
+ *
+ * @param buf	The buffer to place the result into
+ * @param size	The size of the buffer, including the trailing null space
+ * @param fmt	The format string to use
+ * @param ...	Arguments for the format string
+ *
+ * The return value is the number of characters written into @buf not including
+ * the trailing '\0'. If @size is == 0 the function returns 0.
+ *
+ * See the vsprintf() documentation for format string extensions over C99.
+ */
 int scnprintf(char *buf, size_t size, const char *fmt, ...)
 		__attribute__ ((format (__printf__, 3, 4)));
+
+/**
+ * Format a string and place it in a buffer (base function)
+ *
+ * @param buf	The buffer to place the result into
+ * @param size	The size of the buffer, including the trailing null space
+ * @param fmt	The format string to use
+ * @param args	Arguments for the format string
+ * @return The number characters which would be generated for the given
+ * input, excluding the trailing '\0', as per ISO C99. Note that fewer
+ * characters may be written if this number of characters is >= size.
+ *
+ * This function follows C99 vsnprintf, but has some extensions:
+ * %pS output the name of a text symbol
+ * %pF output the name of a function pointer
+ * %pR output the address range in a struct resource
+ *
+ * The function returns the number of characters which would be
+ * generated for the given input, excluding the trailing '\0',
+ * as per ISO C99.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want snprintf() instead.
+ */
 int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
+
+/**
+ * Format a string and place it in a buffer (va_list version)
+ *
+ * @param buf	The buffer to place the result into
+ * @param size	The size of the buffer, including the trailing null space
+ * @param fmt	The format string to use
+ * @param args	Arguments for the format string
+ * @return the number of characters which have been written into
+ * the @buf not including the trailing '\0'. If @size is == 0 the function
+ * returns 0.
+ *
+ * If you're not already dealing with a va_list consider using scnprintf().
+ *
+ * See the vsprintf() documentation for format string extensions over C99.
+ */
 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
 #else
 /*
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 7a145ea92..e38a4b70f 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -67,32 +67,6 @@ unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
 	return result;
 }
 
-/**
- * strict_strtoul - convert a string to an unsigned long strictly
- * @cp: The string to be converted
- * @base: The number base to use
- * @res: The converted result value
- *
- * strict_strtoul converts a string to an unsigned long only if the
- * string is really an unsigned long string, any string containing
- * any invalid char at the tail will be rejected and -EINVAL is returned,
- * only a newline char at the tail is acceptible because people generally
- * change a module parameter in the following way:
- *
- *      echo 1024 > /sys/module/e1000/parameters/copybreak
- *
- * echo will append a newline to the tail.
- *
- * It returns 0 if conversion is successful and *res is set to the converted
- * value, otherwise it returns -EINVAL and *res is set to 0.
- *
- * simple_strtoul just ignores the successive invalid characters and
- * return the converted value of prefix part of the string.
- *
- * Copied this function from Linux 2.6.38 commit ID:
- * 521cb40b0c44418a4fd36dc633f575813d59a43d
- *
- */
 int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
 {
 	char *tail;
@@ -540,25 +514,6 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 		      precision, flags);
 }
 
-/**
- * Format a string and place it in a buffer (base function)
- *
- * @param buf	The buffer to place the result into
- * @param size	The size of the buffer, including the trailing null space
- * @param fmt	The format string to use
- * @param args	Arguments for the format string
- * @return The number characters which would be generated for the given
- * input, excluding the trailing '\0', as per ISO C99. Note that fewer
- * characters may be written if this number of characters is >= size.
- *
- * This function follows C99 vsnprintf, but has some extensions:
- * %pS output the name of a text symbol
- * %pF output the name of a function pointer
- * %pR output the address range in a struct resource
- *
- * Call this function if you are already dealing with a va_list.
- * You probably want snprintf() instead.
- */
 static int vsnprintf_internal(char *buf, size_t size, const char *fmt,
 			      va_list args)
 {
@@ -755,21 +710,6 @@ int vsnprintf(char *buf, size_t size, const char *fmt,
 	return vsnprintf_internal(buf, size, fmt, args);
 }
 
-/**
- * Format a string and place it in a buffer (va_list version)
- *
- * @param buf	The buffer to place the result into
- * @param size	The size of the buffer, including the trailing null space
- * @param fmt	The format string to use
- * @param args	Arguments for the format string
- * @return the number of characters which have been written into
- * the @buf not including the trailing '\0'. If @size is == 0 the function
- * returns 0.
- *
- * If you're not already dealing with a va_list consider using scnprintf().
- *
- * See the vsprintf() documentation for format string extensions over C99.
- */
 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
 {
 	int i;
@@ -783,20 +723,6 @@ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
 	return 0;
 }
 
-/**
- * Format a string and place it in a buffer
- *
- * @param buf	The buffer to place the result into
- * @param size	The size of the buffer, including the trailing null space
- * @param fmt	The format string to use
- * @param ...	Arguments for the format string
- * @return the number of characters which would be
- * generated for the given input, excluding the trailing null,
- * as per ISO C99.  If the return is greater than or equal to
- * @size, the resulting string is truncated.
- *
- * See the vsprintf() documentation for format string extensions over C99.
- */
 int snprintf(char *buf, size_t size, const char *fmt, ...)
 {
 	va_list args;
@@ -809,20 +735,6 @@ int snprintf(char *buf, size_t size, const char *fmt, ...)
 	return i;
 }
 
-/**
- * Format a string and place it in a buffer
- *
- * @param buf	The buffer to place the result into
- * @param size	The size of the buffer, including the trailing null space
- * @param fmt	The format string to use
- * @param ...	Arguments for the format string
- *
- * The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is == 0 the function returns 0.
- *
- * See the vsprintf() documentation for format string extensions over C99.
- */
-
 int scnprintf(char *buf, size_t size, const char *fmt, ...)
 {
 	va_list args;
@@ -854,18 +766,6 @@ int vsprintf(char *buf, const char *fmt, va_list args)
 	return vsnprintf_internal(buf, INT_MAX, fmt, args);
 }
 
-/**
- * Format a string and place it in a buffer
- *
- * @param buf	The buffer to place the result into
- * @param fmt	The format string to use
- * @param ...	Arguments for the format string
- *
- * The function returns the number of characters written
- * into @buf.
- *
- * See the vsprintf() documentation for format string extensions over C99.
- */
 int sprintf(char * buf, const char *fmt, ...)
 {
 	va_list args;