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author(no author) <(no author)@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>2006-08-09 00:01:36 +0000
committer(no author) <(no author)@6dc7ffe9-61d6-0310-9af1-9938baff3ed1>2006-08-09 00:01:36 +0000
commit2a2d6309b6bd0e87ff6eae9c48890525142f99a3 (patch)
treed27105a70e2e0769622e657fc01a7e11b40b8512
parent9f204d3db383355ceb2a289ece09a7a1fc7ecb09 (diff)
- import some more low-level routines from linux kenrel arm port to save
memory footprint - make compilation of components only required for debugging conditional git-svn-id: https://svn.openpcd.org:2342/trunk@95 6dc7ffe9-61d6-0310-9af1-9938baff3ed1
-rw-r--r--openpcd/firmware/Makefile33
-rw-r--r--openpcd/firmware/include/asm/ctype.h54
-rw-r--r--openpcd/firmware/include/asm/div64.h48
-rw-r--r--openpcd/firmware/include/asm/system.h1
-rw-r--r--openpcd/firmware/lib/ctype.c34
-rw-r--r--openpcd/firmware/lib/div64.S200
-rw-r--r--openpcd/firmware/lib/lib1funcs.S3
-rw-r--r--openpcd/firmware/lib/string.c610
-rw-r--r--openpcd/firmware/lib/vsprintf.c830
9 files changed, 1802 insertions, 11 deletions
diff --git a/openpcd/firmware/Makefile b/openpcd/firmware/Makefile
index df8f427..d772b89 100644
--- a/openpcd/firmware/Makefile
+++ b/openpcd/firmware/Makefile
@@ -72,13 +72,17 @@ SRC =
# List C source files here which must be compiled in ARM-Mode.
# use file-extension c for "c-only"-files
-SRCARM = lib/lib_AT91SAM7.c src/pcd_enumerate.c src/fifo.c src/dbgu.c \
+SRCARM = lib/lib_AT91SAM7.c
+SRCARM += src/pcd_enumerate.c src/fifo.c src/dbgu.c \
src/led.c src/rc632.c src/rc632_highlevel.c src/req_ctx.c \
src/trigger.c src/main.c src/syscalls.c src/pwm.c src/tc.c \
src/usb_handler.c src/ssc.c \
src/$(TARGET).c src/start/Cstartup_SAM7.c
+ifdef DEBUG
+SRCARM += lib/vsprintf.c lib/ctype.c lib/string.c
+endif
-SRCARM += src/rfid_layer2_iso14443a.c
+#SRCARM += src/rfid_layer2_iso14443a.c
# List C++ source files here.
# use file-extension cpp for C++-files (use extension .cpp)
@@ -98,7 +102,11 @@ CPPSRCARM =
# care about how the name is spelled on its command-line.
ASRC =
-ASRCLIB = lib/changebit.S lib/clearbit.S lib/setbit.S lib/testchangebit.S lib/testclearbit.S lib/testsetbit.S lib/memcpy.S lib/memset.S lib/lib1funcs.S
+ASRCLIB = lib/changebit.S lib/clearbit.S lib/setbit.S lib/testchangebit.S \
+ lib/testclearbit.S lib/testsetbit.S
+ifdef DEBUG
+ASRCLIB += lib/memcpy.S lib/memset.S lib/lib1funcs.S lib/div64.S
+endif
# List Assembler source files here which must be assembled in ARM-Mode..
ASRCARM = src/start/Cstartup.S $(ASRCLIB)
@@ -117,8 +125,8 @@ OPT = 3
# Debugging format.
# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
-#DEBUG = stabs
-DEBUG = dwarf-2
+#DEBUGF = stabs
+DEBUGF = dwarf-2
# List any extra directories to look for include files here.
# Each directory must be seperated by a space.
@@ -144,7 +152,12 @@ AT91LIBNOWARN = yes
CSTANDARD = -std=gnu99
# Place -D or -U options for C here
-CDEFS = -D$(RUN_MODE) -D__MS_types__ -D__LIBRFID__ -DDEBUG
+CDEFS = -D$(RUN_MODE) -D__MS_types__ -D__LIBRFID__
+
+ifdef DEBUG
+CDEF += -DDEBUG
+endif
+
ifdef OLIMEX
CDEFS += -DOLIMEX
endif
@@ -173,7 +186,7 @@ ADEFS += -D__$(SUBMDL)__
# -adhlns...: create assembler listing
#
# Flags for C and C++ (arm-elf-gcc/arm-elf-g++)
-CFLAGS = -g$(DEBUG)
+CFLAGS = -g$(DEBUGF)
CFLAGS += $(CDEFS) $(CINCS)
CFLAGS += -O$(OPT)
CFLAGS += -Wall -Wextra -Wcast-align -Wimplicit -Wunused
@@ -203,8 +216,8 @@ CPPFLAGS =
# Assembler flags.
# -Wa,...: tell GCC to pass this to the assembler.
# -ahlns: create listing
-# -g$(DEBUG): have the assembler create line number information
-ASFLAGS = $(ADEFS) -Wa,-adhlns=$(<:.S=.lst),--g$(DEBUG) -Iinclude/ -D__ASSEMBLY__
+# -g$(DEBUGF): have the assembler create line number information
+ASFLAGS = $(ADEFS) -Wa,-adhlns=$(<:.S=.lst),--g$(DEBUGF) -Iinclude/ -D__ASSEMBLY__
#Additional libraries.
@@ -219,7 +232,7 @@ EXTRA_LIBS =
#Support for newlibc-lpc (file: libnewlibc-lpc.a)
#NEWLIBLPC = -lnewlib-lpc
-MATH_LIB = -lm
+MATH_LIB = #-lm
# CPLUSPLUS_LIB = -lstdc++
diff --git a/openpcd/firmware/include/asm/ctype.h b/openpcd/firmware/include/asm/ctype.h
new file mode 100644
index 0000000..afa3639
--- /dev/null
+++ b/openpcd/firmware/include/asm/ctype.h
@@ -0,0 +1,54 @@
+#ifndef _LINUX_CTYPE_H
+#define _LINUX_CTYPE_H
+
+/*
+ * NOTE! This ctype does not handle EOF like the standard C
+ * library is required to.
+ */
+
+#define _U 0x01 /* upper */
+#define _L 0x02 /* lower */
+#define _D 0x04 /* digit */
+#define _C 0x08 /* cntrl */
+#define _P 0x10 /* punct */
+#define _S 0x20 /* white space (space/lf/tab) */
+#define _X 0x40 /* hex digit */
+#define _SP 0x80 /* hard space (0x20) */
+
+extern unsigned char _ctype[];
+
+#define __ismask(x) (_ctype[(int)(unsigned char)(x)])
+
+#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
+#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
+#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
+#define isdigit(c) ((__ismask(c)&(_D)) != 0)
+#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
+#define islower(c) ((__ismask(c)&(_L)) != 0)
+#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
+#define ispunct(c) ((__ismask(c)&(_P)) != 0)
+#define isspace(c) ((__ismask(c)&(_S)) != 0)
+#define isupper(c) ((__ismask(c)&(_U)) != 0)
+#define isxdigit(c) ((__ismask(c)&(_D|_X)) != 0)
+
+#define isascii(c) (((unsigned char)(c))<=0x7f)
+#define toascii(c) (((unsigned char)(c))&0x7f)
+
+static inline unsigned char __tolower(unsigned char c)
+{
+ if (isupper(c))
+ c -= 'A'-'a';
+ return c;
+}
+
+static inline unsigned char __toupper(unsigned char c)
+{
+ if (islower(c))
+ c -= 'a'-'A';
+ return c;
+}
+
+#define tolower(c) __tolower(c)
+#define toupper(c) __toupper(c)
+
+#endif
diff --git a/openpcd/firmware/include/asm/div64.h b/openpcd/firmware/include/asm/div64.h
new file mode 100644
index 0000000..3682616
--- /dev/null
+++ b/openpcd/firmware/include/asm/div64.h
@@ -0,0 +1,48 @@
+#ifndef __ASM_ARM_DIV64
+#define __ASM_ARM_DIV64
+
+#include <asm/system.h>
+
+/*
+ * The semantics of do_div() are:
+ *
+ * uint32_t do_div(uint64_t *n, uint32_t base)
+ * {
+ * uint32_t remainder = *n % base;
+ * *n = *n / base;
+ * return remainder;
+ * }
+ *
+ * In other words, a 64-bit dividend with a 32-bit divisor producing
+ * a 64-bit result and a 32-bit remainder. To accomplish this optimally
+ * we call a special __do_div64 helper with completely non standard
+ * calling convention for arguments and results (beware).
+ */
+
+#ifdef __ARMEB__
+#define __xh "r0"
+#define __xl "r1"
+#else
+#define __xl "r0"
+#define __xh "r1"
+#endif
+
+#define do_div(n,base) \
+({ \
+ register unsigned int __base asm("r4") = base; \
+ register unsigned long long __n asm("r0") = n; \
+ register unsigned long long __res asm("r2"); \
+ register unsigned int __rem asm(__xh); \
+ asm( __asmeq("%0", __xh) \
+ __asmeq("%1", "r2") \
+ __asmeq("%2", "r0") \
+ __asmeq("%3", "r4") \
+ "bl __do_div64" \
+ : "=r" (__rem), "=r" (__res) \
+ : "r" (__n), "r" (__base) \
+ : "ip", "lr", "cc"); \
+ n = __res; \
+ __rem; \
+})
+
+#endif
diff --git a/openpcd/firmware/include/asm/system.h b/openpcd/firmware/include/asm/system.h
index 07d4151..2bf0cc5 100644
--- a/openpcd/firmware/include/asm/system.h
+++ b/openpcd/firmware/include/asm/system.h
@@ -104,5 +104,6 @@
(int)(flags & PSR_I_BIT); \
})
+#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t"
#endif
diff --git a/openpcd/firmware/lib/ctype.c b/openpcd/firmware/lib/ctype.c
new file mode 100644
index 0000000..6ec51cc
--- /dev/null
+++ b/openpcd/firmware/lib/ctype.c
@@ -0,0 +1,34 @@
+/*
+ * linux/lib/ctype.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#include <asm/ctype.h>
+
+unsigned char _ctype[] = {
+_C,_C,_C,_C,_C,_C,_C,_C, /* 0-7 */
+_C,_C|_S,_C|_S,_C|_S,_C|_S,_C|_S,_C,_C, /* 8-15 */
+_C,_C,_C,_C,_C,_C,_C,_C, /* 16-23 */
+_C,_C,_C,_C,_C,_C,_C,_C, /* 24-31 */
+_S|_SP,_P,_P,_P,_P,_P,_P,_P, /* 32-39 */
+_P,_P,_P,_P,_P,_P,_P,_P, /* 40-47 */
+_D,_D,_D,_D,_D,_D,_D,_D, /* 48-55 */
+_D,_D,_P,_P,_P,_P,_P,_P, /* 56-63 */
+_P,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U, /* 64-71 */
+_U,_U,_U,_U,_U,_U,_U,_U, /* 72-79 */
+_U,_U,_U,_U,_U,_U,_U,_U, /* 80-87 */
+_U,_U,_U,_P,_P,_P,_P,_P, /* 88-95 */
+_P,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L, /* 96-103 */
+_L,_L,_L,_L,_L,_L,_L,_L, /* 104-111 */
+_L,_L,_L,_L,_L,_L,_L,_L, /* 112-119 */
+_L,_L,_L,_P,_P,_P,_P,_C, /* 120-127 */
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 128-143 */
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 144-159 */
+_S|_SP,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P, /* 160-175 */
+_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P, /* 176-191 */
+_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U, /* 192-207 */
+_U,_U,_U,_U,_U,_U,_U,_P,_U,_U,_U,_U,_U,_U,_U,_L, /* 208-223 */
+_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L, /* 224-239 */
+_L,_L,_L,_L,_L,_L,_L,_P,_L,_L,_L,_L,_L,_L,_L,_L}; /* 240-255 */
+
diff --git a/openpcd/firmware/lib/div64.S b/openpcd/firmware/lib/div64.S
new file mode 100644
index 0000000..7eeef50
--- /dev/null
+++ b/openpcd/firmware/lib/div64.S
@@ -0,0 +1,200 @@
+/*
+ * linux/arch/arm/lib/div64.S
+ *
+ * Optimized computation of 64-bit dividend / 32-bit divisor
+ *
+ * Author: Nicolas Pitre
+ * Created: Oct 5, 2003
+ * Copyright: Monta Vista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/linkage.h>
+
+#ifdef __ARMEB__
+#define xh r0
+#define xl r1
+#define yh r2
+#define yl r3
+#else
+#define xl r0
+#define xh r1
+#define yl r2
+#define yh r3
+#endif
+
+/*
+ * __do_div64: perform a division with 64-bit dividend and 32-bit divisor.
+ *
+ * Note: Calling convention is totally non standard for optimal code.
+ * This is meant to be used by do_div() from include/asm/div64.h only.
+ *
+ * Input parameters:
+ * xh-xl = dividend (clobbered)
+ * r4 = divisor (preserved)
+ *
+ * Output values:
+ * yh-yl = result
+ * xh = remainder
+ *
+ * Clobbered regs: xl, ip
+ */
+
+ENTRY(__do_div64)
+
+ @ Test for easy paths first.
+ subs ip, r4, #1
+ bls 9f @ divisor is 0 or 1
+ tst ip, r4
+ beq 8f @ divisor is power of 2
+
+ @ See if we need to handle upper 32-bit result.
+ cmp xh, r4
+ mov yh, #0
+ blo 3f
+
+ @ Align divisor with upper part of dividend.
+ @ The aligned divisor is stored in yl preserving the original.
+ @ The bit position is stored in ip.
+
+#if __LINUX_ARM_ARCH__ >= 5
+
+ clz yl, r4
+ clz ip, xh
+ sub yl, yl, ip
+ mov ip, #1
+ mov ip, ip, lsl yl
+ mov yl, r4, lsl yl
+
+#else
+
+ mov yl, r4
+ mov ip, #1
+1: cmp yl, #0x80000000
+ cmpcc yl, xh
+ movcc yl, yl, lsl #1
+ movcc ip, ip, lsl #1
+ bcc 1b
+
+#endif
+
+ @ The division loop for needed upper bit positions.
+ @ Break out early if dividend reaches 0.
+2: cmp xh, yl
+ orrcs yh, yh, ip
+ subcss xh, xh, yl
+ movnes ip, ip, lsr #1
+ mov yl, yl, lsr #1
+ bne 2b
+
+ @ See if we need to handle lower 32-bit result.
+3: cmp xh, #0
+ mov yl, #0
+ cmpeq xl, r4
+ movlo xh, xl
+ movlo pc, lr
+
+ @ The division loop for lower bit positions.
+ @ Here we shift remainer bits leftwards rather than moving the
+ @ divisor for comparisons, considering the carry-out bit as well.
+ mov ip, #0x80000000
+4: movs xl, xl, lsl #1
+ adcs xh, xh, xh
+ beq 6f
+ cmpcc xh, r4
+5: orrcs yl, yl, ip
+ subcs xh, xh, r4
+ movs ip, ip, lsr #1
+ bne 4b
+ mov pc, lr
+
+ @ The top part of remainder became zero. If carry is set
+ @ (the 33th bit) this is a false positive so resume the loop.
+ @ Otherwise, if lower part is also null then we are done.
+6: bcs 5b
+ cmp xl, #0
+ moveq pc, lr
+
+ @ We still have remainer bits in the low part. Bring them up.
+
+#if __LINUX_ARM_ARCH__ >= 5
+
+ clz xh, xl @ we know xh is zero here so...
+ add xh, xh, #1
+ mov xl, xl, lsl xh
+ mov ip, ip, lsr xh
+
+#else
+
+7: movs xl, xl, lsl #1
+ mov ip, ip, lsr #1
+ bcc 7b
+
+#endif
+
+ @ Current remainder is now 1. It is worthless to compare with
+ @ divisor at this point since divisor can not be smaller than 3 here.
+ @ If possible, branch for another shift in the division loop.
+ @ If no bit position left then we are done.
+ movs ip, ip, lsr #1
+ mov xh, #1
+ bne 4b
+ mov pc, lr
+
+8: @ Division by a power of 2: determine what that divisor order is
+ @ then simply shift values around
+
+#if __LINUX_ARM_ARCH__ >= 5
+
+ clz ip, r4
+ rsb ip, ip, #31
+
+#else
+
+ mov yl, r4
+ cmp r4, #(1 << 16)
+ mov ip, #0
+ movhs yl, yl, lsr #16
+ movhs ip, #16
+
+ cmp yl, #(1 << 8)
+ movhs yl, yl, lsr #8
+ addhs ip, ip, #8
+
+ cmp yl, #(1 << 4)
+ movhs yl, yl, lsr #4
+ addhs ip, ip, #4
+
+ cmp yl, #(1 << 2)
+ addhi ip, ip, #3
+ addls ip, ip, yl, lsr #1
+
+#endif
+
+ mov yh, xh, lsr ip
+ mov yl, xl, lsr ip
+ rsb ip, ip, #32
+ orr yl, yl, xh, lsl ip
+ mov xh, xl, lsl ip
+ mov xh, xh, lsr ip
+ mov pc, lr
+
+ @ eq -> division by 1: obvious enough...
+9: moveq yl, xl
+ moveq yh, xh
+ moveq xh, #0
+ moveq pc, lr
+
+ @ Division by 0:
+ str lr, [sp, #-8]!
+ bl __div0
+
+ @ as wrong as it could be...
+ mov yl, #0
+ mov yh, #0
+ mov xh, #0
+ ldr pc, [sp], #8
+
diff --git a/openpcd/firmware/lib/lib1funcs.S b/openpcd/firmware/lib/lib1funcs.S
index 10d175a..92a6c56 100644
--- a/openpcd/firmware/lib/lib1funcs.S
+++ b/openpcd/firmware/lib/lib1funcs.S
@@ -334,4 +334,5 @@ Ldiv0:
mov r0, #0 @ About as wrong as it could be.
ldr pc, [sp], #8
-
+ENTRY(__div0)
+ mov pc, lr
diff --git a/openpcd/firmware/lib/string.c b/openpcd/firmware/lib/string.c
new file mode 100644
index 0000000..44d91e2
--- /dev/null
+++ b/openpcd/firmware/lib/string.c
@@ -0,0 +1,610 @@
+/*
+ * linux/lib/string.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+/*
+ * stupid library routines.. The optimized versions should generally be found
+ * as inline code in <asm-xx/string.h>
+ *
+ * These are buggy as well..
+ *
+ * * Fri Jun 25 1999, Ingo Oeser <ioe@informatik.tu-chemnitz.de>
+ * - Added strsep() which will replace strtok() soon (because strsep() is
+ * reentrant and should be faster). Use only strsep() in new code, please.
+ *
+ * * Sat Feb 09 2002, Jason Thomas <jason@topic.com.au>,
+ * Matthew Hawkins <matt@mh.dropbear.id.au>
+ * - Kissed strtok() goodbye
+ */
+
+#include <sys/types.h>
+#include <string.h>
+#include <asm/ctype.h>
+
+#if 0
+#ifndef __HAVE_ARCH_STRNICMP
+/**
+ * strnicmp - Case insensitive, length-limited string comparison
+ * @s1: One string
+ * @s2: The other string
+ * @len: the maximum number of characters to compare
+ */
+int strnicmp(const char *s1, const char *s2, size_t len)
+{
+ /* Yes, Virginia, it had better be unsigned */
+ unsigned char c1, c2;
+
+ c1 = c2 = 0;
+ if (len) {
+ do {
+ c1 = *s1;
+ c2 = *s2;
+ s1++;
+ s2++;
+ if (!c1)
+ break;
+ if (!c2)
+ break;
+ if (c1 == c2)
+ continue;
+ c1 = tolower(c1);
+ c2 = tolower(c2);
+ if (c1 != c2)
+ break;
+ } while (--len);
+ }
+ return (int)c1 - (int)c2;
+}
+EXPORT_SYMBOL(strnicmp);
+#endif
+
+#ifndef __HAVE_ARCH_STRCPY
+/**
+ * strcpy - Copy a %NUL terminated string
+ * @dest: Where to copy the string to
+ * @src: Where to copy the string from
+ */
+#undef strcpy
+char *strcpy(char *dest, const char *src)
+{
+ char *tmp = dest;
+
+ while ((*dest++ = *src++) != '\0')
+ /* nothing */;
+ return tmp;
+}
+EXPORT_SYMBOL(strcpy);
+#endif
+
+#ifndef __HAVE_ARCH_STRNCPY
+/**
+ * strncpy - Copy a length-limited, %NUL-terminated string
+ * @dest: Where to copy the string to
+ * @src: Where to copy the string from
+ * @count: The maximum number of bytes to copy
+ *
+ * The result is not %NUL-terminated if the source exceeds
+ * @count bytes.
+ *
+ * In the case where the length of @src is less than that of
+ * count, the remainder of @dest will be padded with %NUL.
+ *
+ */
+char *strncpy(char *dest, const char *src, size_t count)
+{
+ char *tmp = dest;
+
+ while (count) {
+ if ((*tmp = *src) != 0)
+ src++;
+ tmp++;
+ count--;
+ }
+ return dest;
+}
+EXPORT_SYMBOL(strncpy);
+#endif
+
+#ifndef __HAVE_ARCH_STRLCPY
+/**
+ * strlcpy - Copy a %NUL terminated string into a sized buffer
+ * @dest: Where to copy the string to
+ * @src: Where to copy the string from
+ * @size: size of destination buffer
+ *
+ * Compatible with *BSD: the result is always a valid
+ * NUL-terminated string that fits in the buffer (unless,
+ * of course, the buffer size is zero). It does not pad
+ * out the result like strncpy() does.
+ */
+size_t strlcpy(char *dest, const char *src, size_t size)
+{
+ size_t ret = strlen(src);
+
+ if (size) {
+ size_t len = (ret >= size) ? size - 1 : ret;
+ memcpy(dest, src, len);
+ dest[len] = '\0';
+ }
+ return ret;
+}
+EXPORT_SYMBOL(strlcpy);
+#endif
+
+#ifndef __HAVE_ARCH_STRCAT
+/**
+ * strcat - Append one %NUL-terminated string to another
+ * @dest: The string to be appended to
+ * @src: The string to append to it
+ */
+#undef strcat
+char *strcat(char *dest, const char *src)
+{
+ char *tmp = dest;
+
+ while (*dest)
+ dest++;
+ while ((*dest++ = *src++) != '\0')
+ ;
+ return tmp;
+}
+EXPORT_SYMBOL(strcat);
+#endif
+
+#ifndef __HAVE_ARCH_STRNCAT
+/**
+ * strncat - Append a length-limited, %NUL-terminated string to another
+ * @dest: The string to be appended to
+ * @src: The string to append to it
+ * @count: The maximum numbers of bytes to copy
+ *
+ * Note that in contrast to strncpy, strncat ensures the result is
+ * terminated.
+ */
+char *strncat(char *dest, const char *src, size_t count)
+{
+ char *tmp = dest;
+
+ if (count) {
+ while (*dest)
+ dest++;
+ while ((*dest++ = *src++) != 0) {
+ if (--count == 0) {
+ *dest = '\0';
+ break;
+ }
+ }
+ }
+ return tmp;
+}
+EXPORT_SYMBOL(strncat);
+#endif
+
+#ifndef __HAVE_ARCH_STRLCAT
+/**
+ * strlcat - Append a length-limited, %NUL-terminated string to another
+ * @dest: The string to be appended to
+ * @src: The string to append to it
+ * @count: The size of the destination buffer.
+ */
+size_t strlcat(char *dest, const char *src, size_t count)
+{
+ size_t dsize = strlen(dest);
+ size_t len = strlen(src);
+ size_t res = dsize + len;
+
+ /* This would be a bug */
+ BUG_ON(dsize >= count);
+
+ dest += dsize;
+ count -= dsize;
+ if (len >= count)
+ len = count-1;
+ memcpy(dest, src, len);
+ dest[len] = 0;
+ return res;
+}
+EXPORT_SYMBOL(strlcat);
+#endif
+
+#ifndef __HAVE_ARCH_STRCMP
+/**
+ * strcmp - Compare two strings
+ * @cs: One string
+ * @ct: Another string
+ */
+#undef strcmp
+int strcmp(const char *cs, const char *ct)
+{
+ signed char __res;
+
+ while (1) {
+ if ((__res = *cs - *ct++) != 0 || !*cs++)
+ break;
+ }
+ return __res;
+}
+EXPORT_SYMBOL(strcmp);
+#endif
+
+#ifndef __HAVE_ARCH_STRNCMP
+/**
+ * strncmp - Compare two length-limited strings
+ * @cs: One string
+ * @ct: Another string
+ * @count: The maximum number of bytes to compare
+ */
+int strncmp(const char *cs, const char *ct, size_t count)
+{
+ signed char __res = 0;
+
+ while (count) {
+ if ((__res = *cs - *ct++) != 0 || !*cs++)
+ break;
+ count--;
+ }
+ return __res;
+}
+EXPORT_SYMBOL(strncmp);
+#endif
+
+#ifndef __HAVE_ARCH_STRCHR
+/**
+ * strchr - Find the first occurrence of a character in a string
+ * @s: The string to be searched
+ * @c: The character to search for
+ */
+char *strchr(const char *s, int c)
+{
+ for (; *s != (char)c; ++s)
+ if (*s == '\0')
+ return NULL;
+ return (char *)s;
+}
+EXPORT_SYMBOL(strchr);
+#endif
+
+#ifndef __HAVE_ARCH_STRRCHR
+/**
+ * strrchr - Find the last occurrence of a character in a string
+ * @s: The string to be searched
+ * @c: The character to search for
+ */
+char *strrchr(const char *s, int c)
+{
+ const char *p = s + strlen(s);
+ do {
+ if (*p == (char)c)
+ return (char *)p;
+ } while (--p >= s);
+ return NULL;
+}
+EXPORT_SYMBOL(strrchr);
+#endif
+
+#ifndef __HAVE_ARCH_STRNCHR
+/**
+ * strnchr - Find a character in a length limited string
+ * @s: The string to be searched
+ * @count: The number of characters to be searched
+ * @c: The character to search for
+ */
+char *strnchr(const char *s, size_t count, int c)
+{
+ for (; count-- && *s != '\0'; ++s)
+ if (*s == (char)c)
+ return (char *)s;
+ return NULL;
+}
+EXPORT_SYMBOL(strnchr);
+#endif
+
+#ifndef __HAVE_ARCH_STRLEN
+/**
+ * strlen - Find the length of a string
+ * @s: The string to be sized
+ */
+size_t strlen(const char *s)
+{
+ const char *sc;
+
+ for (sc = s; *sc != '\0'; ++sc)
+ /* nothing */;
+ return sc - s;
+}
+EXPORT_SYMBOL(strlen);
+#endif
+
+#endif
+
+#ifndef __HAVE_ARCH_STRNLEN
+/**
+ * strnlen - Find the length of a length-limited string
+ * @s: The string to be sized
+ * @count: The maximum number of bytes to search
+ */
+size_t strnlen(const char *s, size_t count)
+{
+ const char *sc;
+
+ for (sc = s; count-- && *sc != '\0'; ++sc)
+ /* nothing */;
+ return sc - s;
+}
+#endif
+
+#if 0
+#ifndef __HAVE_ARCH_STRSPN
+/**
+ * strspn - Calculate the length of the initial substring of @s which only
+ * contain letters in @accept
+ * @s: The string to be searched
+ * @accept: The string to search for
+ */
+size_t strspn(const char *s, const char *accept)
+{
+ const char *p;
+ const char *a;
+ size_t count = 0;
+
+ for (p = s; *p != '\0'; ++p) {
+ for (a = accept; *a != '\0'; ++a) {
+ if (*p == *a)
+ break;
+ }
+ if (*a == '\0')
+ return count;
+ ++count;
+ }
+ return count;
+}
+
+EXPORT_SYMBOL(strspn);
+#endif
+
+#ifndef __HAVE_ARCH_STRCSPN
+/**
+ * strcspn - Calculate the length of the initial substring of @s which does
+ * not contain letters in @reject
+ * @s: The string to be searched
+ * @reject: The string to avoid
+ */
+size_t strcspn(const char *s, const char *reject)
+{
+ const char *p;
+ const char *r;
+ size_t count = 0;
+
+ for (p = s; *p != '\0'; ++p) {
+ for (r = reject; *r != '\0'; ++r) {
+ if (*p == *r)
+ return count;
+ }
+ ++count;
+ }
+ return count;
+}
+EXPORT_SYMBOL(strcspn);
+#endif
+
+#ifndef __HAVE_ARCH_STRPBRK
+/**
+ * strpbrk - Find the first occurrence of a set of characters
+ * @cs: The string to be searched
+ * @ct: The characters to search for
+ */
+char *strpbrk(const char *cs, const char *ct)
+{
+ const char *sc1, *sc2;
+
+ for (sc1 = cs; *sc1 != '\0'; ++sc1) {
+ for (sc2 = ct; *sc2 != '\0'; ++sc2) {
+ if (*sc1 == *sc2)
+ return (char *)sc1;
+ }
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(strpbrk);
+#endif
+
+#ifndef __HAVE_ARCH_STRSEP
+/**
+ * strsep - Split a string into tokens
+ * @s: The string to be searched
+ * @ct: The characters to search for
+ *
+ * strsep() updates @s to point after the token, ready for the next call.
+ *
+ * It returns empty tokens, too, behaving exactly like the libc function
+ * of that name. In fact, it was stolen from glibc2 and de-fancy-fied.
+ * Same semantics, slimmer shape. ;)
+ */
+char *strsep(char **s, const char *ct)
+{
+ char *sbegin = *s;
+ char *end;
+
+ if (sbegin == NULL)
+ return NULL;
+
+ end = strpbrk(sbegin, ct);
+ if (end)
+ *end++ = '\0';
+ *s = end;
+ return sbegin;
+}
+EXPORT_SYMBOL(strsep);
+#endif
+
+#ifndef __HAVE_ARCH_MEMSET
+/**
+ * memset - Fill a region of memory with the given value
+ * @s: Pointer to the start of the area.
+ * @c: The byte to fill the area with
+ * @count: The size of the area.
+ *
+ * Do not use memset() to access IO space, use memset_io() instead.
+ */
+void *memset(void *s, int c, size_t count)
+{
+ char *xs = s;
+
+ while (count--)
+ *xs++ = c;
+ return s;
+}
+EXPORT_SYMBOL(memset);
+#endif
+
+#ifndef __HAVE_ARCH_MEMCPY
+/**
+ * memcpy - Copy one area of memory to another
+ * @dest: Where to copy to
+ * @src: Where to copy from
+ * @count: The size of the area.
+ *
+ * You should not use this function to access IO space, use memcpy_toio()
+ * or memcpy_fromio() instead.
+ */
+void *memcpy(void *dest, const void *src, size_t count)
+{
+ char *tmp = dest;
+ const char *s = src;
+
+ while (count--)
+ *tmp++ = *s++;
+ return dest;
+}
+EXPORT_SYMBOL(memcpy);
+#endif
+
+#ifndef __HAVE_ARCH_MEMMOVE
+/**
+ * memmove - Copy one area of memory to another
+ * @dest: Where to copy to
+ * @src: Where to copy from
+ * @count: The size of the area.
+ *
+ * Unlike memcpy(), memmove() copes with overlapping areas.
+ */
+void *memmove(void *dest, const void *src, size_t count)
+{
+ char *tmp;
+ const char *s;
+
+ if (dest <= src) {
+ tmp = dest;
+ s = src;
+ while (count--)
+ *tmp++ = *s++;
+ } else {
+ tmp = dest;
+ tmp += count;
+ s = src;
+ s += count;
+ while (count--)
+ *--tmp = *--s;
+ }
+ return dest;
+}
+EXPORT_SYMBOL(memmove);
+#endif
+
+#ifndef __HAVE_ARCH_MEMCMP
+/**
+ * memcmp - Compare two areas of memory
+ * @cs: One area of memory
+ * @ct: Another area of memory
+ * @count: The size of the area.
+ */
+#undef memcmp
+int memcmp(const void *cs, const void *ct, size_t count)
+{
+ const unsigned char *su1, *su2;
+ int res = 0;
+
+ for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+ if ((res = *su1 - *su2) != 0)
+ break;
+ return res;
+}
+EXPORT_SYMBOL(memcmp);
+#endif
+
+#ifndef __HAVE_ARCH_MEMSCAN
+/**
+ * memscan - Find a character in an area of memory.
+ * @addr: The memory area
+ * @c: The byte to search for
+ * @size: The size of the area.
+ *
+ * returns the address of the first occurrence of @c, or 1 byte past
+ * the area if @c is not found
+ */
+void *memscan(void *addr, int c, size_t size)
+{
+ unsigned char *p = addr;
+
+ while (size) {
+ if (*p == c)
+ return (void *)p;
+ p++;
+ size--;
+ }
+ return (void *)p;
+}
+EXPORT_SYMBOL(memscan);
+#endif
+
+#ifndef __HAVE_ARCH_STRSTR
+/**
+ * strstr - Find the first substring in a %NUL terminated string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ */
+char *strstr(const char *s1, const char *s2)
+{
+ int l1, l2;
+
+ l2 = strlen(s2);
+ if (!l2)
+ return (char *)s1;
+ l1 = strlen(s1);
+ while (l1 >= l2) {
+ l1--;
+ if (!memcmp(s1, s2, l2))
+ return (char *)s1;
+ s1++;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(strstr);
+#endif
+
+#ifndef __HAVE_ARCH_MEMCHR
+/**
+ * memchr - Find a character in an area of memory.
+ * @s: The memory area
+ * @c: The byte to search for
+ * @n: The size of the area.
+ *
+ * returns the address of the first occurrence of @c, or %NULL
+ * if @c is not found
+ */
+void *memchr(const void *s, int c, size_t n)
+{
+ const unsigned char *p = s;
+ while (n-- != 0) {
+ if ((unsigned char)c == *p++) {
+ return (void *)(p - 1);
+ }
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(memchr);
+#endif
+
+#endif
diff --git a/openpcd/firmware/lib/vsprintf.c b/openpcd/firmware/lib/vsprintf.c
new file mode 100644
index 0000000..9eff70b
--- /dev/null
+++ b/openpcd/firmware/lib/vsprintf.c
@@ -0,0 +1,830 @@
+/*
+ * linux/lib/vsprintf.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
+/*
+ * Wirzenius wrote this portably, Torvalds fucked it up :-)
+ */
+
+/*
+ * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
+ * - changed to provide snprintf and vsnprintf functions
+ * So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
+ * - scnprintf and vscnprintf
+ */
+
+#include <stdarg.h>
+#include <sys/types.h>
+#include <string.h>
+#include <asm/ctype.h>
+
+#include <asm/div64.h>
+
+/**
+ * simple_strtoul - convert a string to an unsigned long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
+{
+ unsigned long result = 0,value;
+
+ if (!base) {
+ base = 10;
+ if (*cp == '0') {
+ base = 8;
+ cp++;
+ if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
+ cp++;
+ base = 16;
+ }
+ }
+ } else if (base == 16) {
+ if (cp[0] == '0' && toupper(cp[1]) == 'X')
+ cp += 2;
+ }
+ while (isxdigit(*cp) &&
+ (value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
+ result = result*base + value;
+ cp++;
+ }
+ if (endp)
+ *endp = (char *)cp;
+ return result;
+}
+
+
+/**
+ * simple_strtol - convert a string to a signed long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+long simple_strtol(const char *cp,char **endp,unsigned int base)
+{
+ if(*cp=='-')
+ return -simple_strtoul(cp+1,endp,base);
+ return simple_strtoul(cp,endp,base);
+}
+
+
+/**
+ * simple_strtoull - convert a string to an unsigned long long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
+{
+ unsigned long long result = 0,value;
+
+ if (!base) {
+ base = 10;
+ if (*cp == '0') {
+ base = 8;
+ cp++;
+ if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
+ cp++;
+ base = 16;
+ }
+ }
+ } else if (base == 16) {
+ if (cp[0] == '0' && toupper(cp[1]) == 'X')
+ cp += 2;
+ }
+ while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
+ ? toupper(*cp) : *cp)-'A'+10) < base) {
+ result = result*base + value;
+ cp++;
+ }
+ if (endp)
+ *endp = (char *)cp;
+ return result;
+}
+
+
+/**
+ * simple_strtoll - convert a string to a signed long long
+ * @cp: The start of the string
+ * @endp: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+long long simple_strtoll(const char *cp,char **endp,unsigned int base)
+{
+ if(*cp=='-')
+ return -simple_strtoull(cp+1,endp,base);
+ return simple_strtoull(cp,endp,base);
+}
+
+static int skip_atoi(const char **s)
+{
+ int i=0;
+
+ while (isdigit(**s))
+ i = i*10 + *((*s)++) - '0';
+ return i;
+}
+
+#define ZEROPAD 1 /* pad with zero */
+#define SIGN 2 /* unsigned/signed long */
+#define PLUS 4 /* show plus */
+#define SPACE 8 /* space if plus */
+#define LEFT 16 /* left justified */
+#define SPECIAL 32 /* 0x */
+#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
+
+static char * number(char * buf, char * end, unsigned long long num, int base, int size, int precision, int type)
+{
+ char c,sign,tmp[66];
+ const char *digits;
+ static const char small_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+ static const char large_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ int i;
+
+ digits = (type & LARGE) ? large_digits : small_digits;
+ if (type & LEFT)
+ type &= ~ZEROPAD;
+ if (base < 2 || base > 36)
+ return NULL;
+ c = (type & ZEROPAD) ? '0' : ' ';
+ sign = 0;
+ if (type & SIGN) {
+ if ((signed long long) num < 0) {
+ sign = '-';
+ num = - (signed long long) num;
+ size--;
+ } else if (type & PLUS) {
+ sign = '+';
+ size--;
+ } else if (type & SPACE) {
+ sign = ' ';
+ size--;
+ }
+ }
+ if (type & SPECIAL) {
+ if (base == 16)
+ size -= 2;
+ else if (base == 8)
+ size--;
+ }
+ i = 0;
+ if (num == 0)
+ tmp[i++]='0';
+ else while (num != 0)
+ tmp[i++] = digits[do_div(num,base)];
+ if (i > precision)
+ precision = i;
+ size -= precision;
+ if (!(type&(ZEROPAD+LEFT))) {
+ while(size-->0) {
+ if (buf <= end)
+ *buf = ' ';
+ ++buf;
+ }
+ }
+ if (sign) {
+ if (buf <= end)
+ *buf = sign;
+ ++buf;
+ }
+ if (type & SPECIAL) {
+ if (base==8) {
+ if (buf <= end)
+ *buf = '0';
+ ++buf;
+ } else if (base==16) {
+ if (buf <= end)
+ *buf = '0';
+ ++buf;
+ if (buf <= end)
+ *buf = digits[33];
+ ++buf;
+ }
+ }
+ if (!(type & LEFT)) {
+ while (size-- > 0) {
+ if (buf <= end)
+ *buf = c;
+ ++buf;
+ }
+ }
+ while (i < precision--) {
+ if (buf <= end)
+ *buf = '0';
+ ++buf;
+ }
+ while (i-- > 0) {
+ if (buf <= end)
+ *buf = tmp[i];
+ ++buf;
+ }
+ while (size-- > 0) {
+ if (buf <= end)
+ *buf = ' ';
+ ++buf;
+ }
+ return buf;
+}
+
+/**
+ * vsnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The return value is the number of characters which would
+ * be generated for the given input, excluding the trailing
+ * '\0', as per ISO C99. If you want to have the exact
+ * number of characters written into @buf as return value
+ * (not including the trailing '\0'), use vscnprintf. If the
+ * return is greater than or equal to @size, the resulting
+ * string is truncated.
+ *
+ * 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)
+{
+ int len;
+ unsigned long long num;
+ int i, base;
+ char *str, *end, c;
+ const char *s;
+
+ int flags; /* flags to number() */
+
+ int field_width; /* width of output field */
+ int precision; /* min. # of digits for integers; max
+ number of chars for from string */
+ int qualifier; /* 'h', 'l', or 'L' for integer fields */
+ /* 'z' support added 23/7/1999 S.H. */
+ /* 'z' changed to 'Z' --davidm 1/25/99 */
+ /* 't' added for ptrdiff_t */
+
+ /* Reject out-of-range values early */
+ if ((int) size < 0) {
+ return 0;
+ }
+
+ str = buf;
+ end = buf + size - 1;
+
+ if (end < buf - 1) {
+ end = ((void *) -1);
+ size = end - buf + 1;
+ }
+
+ for (; *fmt ; ++fmt) {
+ if (*fmt != '%') {
+ if (str <= end)
+ *str = *fmt;
+ ++str;
+ continue;
+ }
+
+ /* process flags */
+ flags = 0;
+ repeat:
+ ++fmt; /* this also skips first '%' */
+ switch (*fmt) {
+ case '-': flags |= LEFT; goto repeat;
+ case '+': flags |= PLUS; goto repeat;
+ case ' ': flags |= SPACE; goto repeat;
+ case '#': flags |= SPECIAL; goto repeat;
+ case '0': flags |= ZEROPAD; goto repeat;
+ }
+
+ /* get field width */
+ field_width = -1;
+ if (isdigit(*fmt))
+ field_width = skip_atoi(&fmt);
+ else if (*fmt == '*') {
+ ++fmt;
+ /* it's the next argument */
+ field_width = va_arg(args, int);
+ if (field_width < 0) {
+ field_width = -field_width;
+ flags |= LEFT;
+ }
+ }
+
+ /* get the precision */
+ precision = -1;
+ if (*fmt == '.') {
+ ++fmt;
+ if (isdigit(*fmt))
+ precision = skip_atoi(&fmt);
+ else if (*fmt == '*') {
+ ++fmt;
+ /* it's the next argument */
+ precision = va_arg(args, int);
+ }
+ if (precision < 0)
+ precision = 0;
+ }
+
+ /* get the conversion qualifier */
+ qualifier = -1;
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+ *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
+ qualifier = *fmt;
+ ++fmt;
+ if (qualifier == 'l' && *fmt == 'l') {
+ qualifier = 'L';
+ ++fmt;
+ }
+ }
+
+ /* default base */
+ base = 10;
+
+ switch (*fmt) {
+ case 'c':
+ if (!(flags & LEFT)) {
+ while (--field_width > 0) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ }
+ c = (unsigned char) va_arg(args, int);
+ if (str <= end)
+ *str = c;
+ ++str;
+ while (--field_width > 0) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ continue;
+
+ case 's':
+ s = va_arg(args, char *);
+
+ len = strnlen(s, precision);
+
+ if (!(flags & LEFT)) {
+ while (len < field_width--) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ }
+ for (i = 0; i < len; ++i) {
+ if (str <= end)
+ *str = *s;
+ ++str; ++s;
+ }
+ while (len < field_width--) {
+ if (str <= end)
+ *str = ' ';
+ ++str;
+ }
+ continue;
+
+ case 'p':
+ if (field_width == -1) {
+ field_width = 2*sizeof(void *);
+ flags |= ZEROPAD;
+ }
+ str = number(str, end,
+ (unsigned long) va_arg(args, void *),
+ 16, field_width, precision, flags);
+ continue;
+
+
+ case 'n':
+ /* FIXME:
+ * What does C99 say about the overflow case here? */
+ if (qualifier == 'l') {
+ long * ip = va_arg(args, long *);
+ *ip = (str - buf);
+ } else if (qualifier == 'Z' || qualifier == 'z') {
+ size_t * ip = va_arg(args, size_t *);
+ *ip = (str - buf);
+ } else {
+ int * ip = va_arg(args, int *);
+ *ip = (str - buf);
+ }
+ continue;
+
+ case '%':
+ if (str <= end)
+ *str = '%';
+ ++str;
+ continue;
+
+ /* integer number formats - set up the flags and "break" */
+ case 'o':
+ base = 8;
+ break;
+
+ case 'X':
+ flags |= LARGE;
+ case 'x':
+ base = 16;
+ break;
+
+ case 'd':
+ case 'i':
+ flags |= SIGN;
+ case 'u':
+ break;
+
+ default:
+ if (str <= end)
+ *str = '%';
+ ++str;
+ if (*fmt) {
+ if (str <= end)
+ *str = *fmt;
+ ++str;
+ } else {
+ --fmt;
+ }
+ continue;
+ }
+ if (qualifier == 'L')
+ num = va_arg(args, long long);
+ else if (qualifier == 'l') {
+ num = va_arg(args, unsigned long);
+ if (flags & SIGN)
+ num = (signed long) num;
+ } else if (qualifier == 'Z' || qualifier == 'z') {
+ num = va_arg(args, size_t);
+ } else if (qualifier == 't') {
+ num = va_arg(args, ptrdiff_t);
+ } else if (qualifier == 'h') {
+ num = (unsigned short) va_arg(args, int);
+ if (flags & SIGN)
+ num = (signed short) num;
+ } else {
+ num = va_arg(args, unsigned int);
+ if (flags & SIGN)
+ num = (signed int) num;
+ }
+ str = number(str, end, num, base,
+ field_width, precision, flags);
+ }
+ if (str <= end)
+ *str = '\0';
+ else if (size > 0)
+ /* don't write out a null byte if the buf size is zero */
+ *end = '\0';
+ /* the trailing null byte doesn't count towards the total
+ * ++str;
+ */
+ return str-buf;
+}
+
+
+/**
+ * vscnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The return value is the number of characters which have been written into
+ * the @buf not including the trailing '\0'. If @size is <= 0 the function
+ * returns 0.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want scnprintf instead.
+ */
+int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
+{
+ int i;
+
+ i=vsnprintf(buf,size,fmt,args);
+ return (i >= size) ? (size - 1) : i;
+}
+
+
+/**
+ * snprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The return value is 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.
+ */
+int snprintf(char * buf, size_t size, const char *fmt, ...)
+{
+ va_list args;
+ int i;
+
+ va_start(args, fmt);
+ i=vsnprintf(buf,size,fmt,args);
+ va_end(args);
+ return i;
+}
+
+
+/**
+ * scnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @...: 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. If the return is
+ * greater than or equal to @size, the resulting string is truncated.
+ */
+
+int scnprintf(char * buf, size_t size, const char *fmt, ...)
+{
+ va_list args;
+ int i;
+
+ va_start(args, fmt);
+ i = vsnprintf(buf, size, fmt, args);
+ va_end(args);
+ return (i >= size) ? (size - 1) : i;
+}
+
+/**
+ * vsprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The function returns the number of characters written
+ * into @buf. Use vsnprintf or vscnprintf in order to avoid
+ * buffer overflows.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want sprintf instead.
+ */
+int vsprintf(char *buf, const char *fmt, va_list args)
+{
+ return vsnprintf(buf, INT_MAX, fmt, args);
+}
+
+
+/**
+ * sprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The function returns the number of characters written
+ * into @buf. Use snprintf or scnprintf in order to avoid
+ * buffer overflows.
+ */
+int sprintf(char * buf, const char *fmt, ...)
+{
+ va_list args;
+ int i;
+
+ va_start(args, fmt);
+ i=vsnprintf(buf, INT_MAX, fmt, args);
+ va_end(args);
+ return i;
+}
+
+
+/**
+ * vsscanf - Unformat a buffer into a list of arguments
+ * @buf: input buffer
+ * @fmt: format of buffer
+ * @args: arguments
+ */
+int vsscanf(const char * buf, const char * fmt, va_list args)
+{
+ const char *str = buf;
+ char *next;
+ char digit;
+ int num = 0;
+ int qualifier;
+ int base;
+ int field_width;
+ int is_sign = 0;
+
+ while(*fmt && *str) {
+ /* skip any white space in format */
+ /* white space in format matchs any amount of
+ * white space, including none, in the input.
+ */
+ if (isspace(*fmt)) {
+ while (isspace(*fmt))
+ ++fmt;
+ while (isspace(*str))
+ ++str;
+ }
+
+ /* anything that is not a conversion must match exactly */
+ if (*fmt != '%' && *fmt) {
+ if (*fmt++ != *str++)
+ break;
+ continue;
+ }
+
+ if (!*fmt)
+ break;
+ ++fmt;
+
+ /* skip this conversion.
+ * advance both strings to next white space
+ */
+ if (*fmt == '*') {
+ while (!isspace(*fmt) && *fmt)
+ fmt++;
+ while (!isspace(*str) && *str)
+ str++;
+ continue;
+ }
+
+ /* get field width */
+ field_width = -1;
+ if (isdigit(*fmt))
+ field_width = skip_atoi(&fmt);
+
+ /* get conversion qualifier */
+ qualifier = -1;
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+ *fmt == 'Z' || *fmt == 'z') {
+ qualifier = *fmt++;
+ if (qualifier == *fmt) {
+ if (qualifier == 'h') {
+ qualifier = 'H';
+ fmt++;
+ } else if (qualifier == 'l') {
+ qualifier = 'L';
+ fmt++;
+ }
+ }
+ }
+ base = 10;
+ is_sign = 0;
+
+ if (!*fmt || !*str)
+ break;
+
+ switch(*fmt++) {
+ case 'c':
+ {
+ char *s = (char *) va_arg(args,char*);
+ if (field_width == -1)
+ field_width = 1;
+ do {
+ *s++ = *str++;
+ } while (--field_width > 0 && *str);
+ num++;
+ }
+ continue;
+ case 's':
+ {
+ char *s = (char *) va_arg(args, char *);
+ if(field_width == -1)
+ field_width = INT_MAX;
+ /* first, skip leading white space in buffer */
+ while (isspace(*str))
+ str++;
+
+ /* now copy until next white space */
+ while (*str && !isspace(*str) && field_width--) {
+ *s++ = *str++;
+ }
+ *s = '\0';
+ num++;
+ }
+ continue;
+ case 'n':
+ /* return number of characters read so far */
+ {
+ int *i = (int *)va_arg(args,int*);
+ *i = str - buf;
+ }
+ continue;
+ case 'o':
+ base = 8;
+ break;
+ case 'x':
+ case 'X':
+ base = 16;
+ break;
+ case 'i':
+ base = 0;
+ case 'd':
+ is_sign = 1;
+ case 'u':
+ break;
+ case '%':
+ /* looking for '%' in str */
+ if (*str++ != '%')
+ return num;
+ continue;
+ default:
+ /* invalid format; stop here */
+ return num;
+ }
+
+ /* have some sort of integer conversion.
+ * first, skip white space in buffer.
+ */
+ while (isspace(*str))
+ str++;
+
+ digit = *str;
+ if (is_sign && digit == '-')
+ digit = *(str + 1);
+
+ if (!digit
+ || (base == 16 && !isxdigit(digit))
+ || (base == 10 && !isdigit(digit))
+ || (base == 8 && (!isdigit(digit) || digit > '7'))
+ || (base == 0 && !isdigit(digit)))
+ break;
+
+ switch(qualifier) {
+ case 'H': /* that's 'hh' in format */
+ if (is_sign) {
+ signed char *s = (signed char *) va_arg(args,signed char *);
+ *s = (signed char) simple_strtol(str,&next,base);
+ } else {
+ unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
+ *s = (unsigned char) simple_strtoul(str, &next, base);
+ }
+ break;
+ case 'h':
+ if (is_sign) {
+ short *s = (short *) va_arg(args,short *);
+ *s = (short) simple_strtol(str,&next,base);
+ } else {
+ unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
+ *s = (unsigned short) simple_strtoul(str, &next, base);
+ }
+ break;
+ case 'l':
+ if (is_sign) {
+ long *l = (long *) va_arg(args,long *);
+ *l = simple_strtol(str,&next,base);
+ } else {
+ unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
+ *l = simple_strtoul(str,&next,base);
+ }
+ break;
+ case 'L':
+ if (is_sign) {
+ long long *l = (long long*) va_arg(args,long long *);
+ *l = simple_strtoll(str,&next,base);
+ } else {
+ unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
+ *l = simple_strtoull(str,&next,base);
+ }
+ break;
+ case 'Z':
+ case 'z':
+ {
+ size_t *s = (size_t*) va_arg(args,size_t*);
+ *s = (size_t) simple_strtoul(str,&next,base);
+ }
+ break;
+ default:
+ if (is_sign) {
+ int *i = (int *) va_arg(args, int*);
+ *i = (int) simple_strtol(str,&next,base);
+ } else {
+ unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
+ *i = (unsigned int) simple_strtoul(str,&next,base);
+ }
+ break;
+ }
+ num++;
+
+ if (!next)
+ break;
+ str = next;
+ }
+ return num;
+}
+
+
+/**
+ * sscanf - Unformat a buffer into a list of arguments
+ * @buf: input buffer
+ * @fmt: formatting of buffer
+ * @...: resulting arguments
+ */
+int sscanf(const char * buf, const char * fmt, ...)
+{
+ va_list args;
+ int i;
+
+ va_start(args,fmt);
+ i = vsscanf(buf,fmt,args);
+ va_end(args);
+ return i;
+}
+
personal git repositories of Harald Welte. Your mileage may vary