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-rw-r--r--crypto/tinyprintf.c521
1 files changed, 521 insertions, 0 deletions
diff --git a/crypto/tinyprintf.c b/crypto/tinyprintf.c
new file mode 100644
index 0000000..bb22700
--- /dev/null
+++ b/crypto/tinyprintf.c
@@ -0,0 +1,521 @@
+/*
+File: tinyprintf.c
+
+Copyright (C) 2004 Kustaa Nyholm
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+*/
+
+#include "tinyprintf.h"
+
+
+/*
+ * Configuration
+ */
+
+/* Enable long int support */
+#define PRINTF_LONG_SUPPORT
+
+/* Enable long long int support (implies long int support) */
+#define PRINTF_LONG_LONG_SUPPORT
+
+/* Enable %z (size_t) support */
+#define PRINTF_SIZE_T_SUPPORT
+
+/*
+ * Configuration adjustments
+ */
+#ifdef PRINTF_SIZE_T_SUPPORT
+#include <sys/types.h>
+#endif
+
+#ifdef PRINTF_LONG_LONG_SUPPORT
+# define PRINTF_LONG_SUPPORT
+#endif
+
+/* __SIZEOF_<type>__ defined at least by gcc */
+#ifdef __SIZEOF_POINTER__
+# define SIZEOF_POINTER __SIZEOF_POINTER__
+#endif
+#ifdef __SIZEOF_LONG_LONG__
+# define SIZEOF_LONG_LONG __SIZEOF_LONG_LONG__
+#endif
+#ifdef __SIZEOF_LONG__
+# define SIZEOF_LONG __SIZEOF_LONG__
+#endif
+#ifdef __SIZEOF_INT__
+# define SIZEOF_INT __SIZEOF_INT__
+#endif
+
+#ifdef __GNUC__
+# define _TFP_GCC_NO_INLINE_ __attribute__ ((noinline))
+#else
+# define _TFP_GCC_NO_INLINE_
+#endif
+
+/*
+ * Implementation
+ */
+struct param {
+ char lz:1; /**< Leading zeros */
+ char alt:1; /**< alternate form */
+ char uc:1; /**< Upper case (for base16 only) */
+ char align_left:1; /**< 0 == align right (default), 1 == align left */
+ unsigned int width; /**< field width */
+ char sign; /**< The sign to display (if any) */
+ unsigned int base; /**< number base (e.g.: 8, 10, 16) */
+ char *bf; /**< Buffer to output */
+};
+
+
+#ifdef PRINTF_LONG_LONG_SUPPORT
+static void _TFP_GCC_NO_INLINE_ ulli2a(
+ unsigned long long int num, struct param *p)
+{
+ int n = 0;
+ unsigned long long int d = 1;
+ char *bf = p->bf;
+ while (num / d >= p->base)
+ d *= p->base;
+ while (d != 0) {
+ int dgt = num / d;
+ num %= d;
+ d /= p->base;
+ if (n || dgt > 0 || d == 0) {
+ *bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10);
+ ++n;
+ }
+ }
+ *bf = 0;
+}
+
+static void lli2a(long long int num, struct param *p)
+{
+ if (num < 0) {
+ num = -num;
+ p->sign = '-';
+ }
+ ulli2a(num, p);
+}
+#endif
+
+#ifdef PRINTF_LONG_SUPPORT
+static void uli2a(unsigned long int num, struct param *p)
+{
+ int n = 0;
+ unsigned long int d = 1;
+ char *bf = p->bf;
+ while (num / d >= p->base)
+ d *= p->base;
+ while (d != 0) {
+ int dgt = num / d;
+ num %= d;
+ d /= p->base;
+ if (n || dgt > 0 || d == 0) {
+ *bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10);
+ ++n;
+ }
+ }
+ *bf = 0;
+}
+
+static void li2a(long num, struct param *p)
+{
+ if (num < 0) {
+ num = -num;
+ p->sign = '-';
+ }
+ uli2a(num, p);
+}
+#endif
+
+static void ui2a(unsigned int num, struct param *p)
+{
+ int n = 0;
+ unsigned int d = 1;
+ char *bf = p->bf;
+ while (num / d >= p->base)
+ d *= p->base;
+ while (d != 0) {
+ int dgt = num / d;
+ num %= d;
+ d /= p->base;
+ if (n || dgt > 0 || d == 0) {
+ *bf++ = dgt + (dgt < 10 ? '0' : (p->uc ? 'A' : 'a') - 10);
+ ++n;
+ }
+ }
+ *bf = 0;
+}
+
+static void i2a(int num, struct param *p)
+{
+ if (num < 0) {
+ num = -num;
+ p->sign = '-';
+ }
+ ui2a(num, p);
+}
+
+static int a2d(char ch)
+{
+ if (ch >= '0' && ch <= '9')
+ return ch - '0';
+ else if (ch >= 'a' && ch <= 'f')
+ return ch - 'a' + 10;
+ else if (ch >= 'A' && ch <= 'F')
+ return ch - 'A' + 10;
+ else
+ return -1;
+}
+
+static char a2u(char ch, const char **src, int base, unsigned int *nump)
+{
+ const char *p = *src;
+ unsigned int num = 0;
+ int digit;
+ while ((digit = a2d(ch)) >= 0) {
+ if (digit > base)
+ break;
+ num = num * base + digit;
+ ch = *p++;
+ }
+ *src = p;
+ *nump = num;
+ return ch;
+}
+
+static void putchw(void *putp, putcf putf, struct param *p)
+{
+ char ch;
+ int n = p->width;
+ char *bf = p->bf;
+
+ /* Number of filling characters */
+ while (*bf++ && n > 0)
+ n--;
+ if (p->sign)
+ n--;
+ if (p->alt && p->base == 16)
+ n -= 2;
+ else if (p->alt && p->base == 8)
+ n--;
+
+ /* Fill with space to align to the right, before alternate or sign */
+ if (!p->lz && !p->align_left) {
+ while (n-- > 0)
+ putf(putp, ' ');
+ }
+
+ /* print sign */
+ if (p->sign)
+ putf(putp, p->sign);
+
+ /* Alternate */
+ if (p->alt && p->base == 16) {
+ putf(putp, '0');
+ putf(putp, (p->uc ? 'X' : 'x'));
+ } else if (p->alt && p->base == 8) {
+ putf(putp, '0');
+ }
+
+ /* Fill with zeros, after alternate or sign */
+ if (p->lz) {
+ while (n-- > 0)
+ putf(putp, '0');
+ }
+
+ /* Put actual buffer */
+ bf = p->bf;
+ while ((ch = *bf++))
+ putf(putp, ch);
+
+ /* Fill with space to align to the left, after string */
+ if (!p->lz && p->align_left) {
+ while (n-- > 0)
+ putf(putp, ' ');
+ }
+}
+
+void tfp_format(void *putp, putcf putf, const char *fmt, va_list va)
+{
+ struct param p;
+#ifdef PRINTF_LONG_SUPPORT
+ char bf[23]; /* long = 64b on some architectures */
+#else
+ char bf[12]; /* int = 32b on some architectures */
+#endif
+ char ch;
+ p.bf = bf;
+
+ while ((ch = *(fmt++))) {
+ if (ch != '%') {
+ putf(putp, ch);
+ } else {
+#ifdef PRINTF_LONG_SUPPORT
+ char lng = 0; /* 1 for long, 2 for long long */
+#endif
+ /* Init parameter struct */
+ p.lz = 0;
+ p.alt = 0;
+ p.width = 0;
+ p.align_left = 0;
+ p.sign = 0;
+
+ /* Flags */
+ while ((ch = *(fmt++))) {
+ switch (ch) {
+ case '-':
+ p.align_left = 1;
+ continue;
+ case '0':
+ p.lz = 1;
+ continue;
+ case '#':
+ p.alt = 1;
+ continue;
+ default:
+ break;
+ }
+ break;
+ }
+
+ /* Width */
+ if (ch >= '0' && ch <= '9') {
+ ch = a2u(ch, &fmt, 10, &(p.width));
+ }
+
+ /* We accept 'x.y' format but don't support it completely:
+ * we ignore the 'y' digit => this ignores 0-fill
+ * size and makes it == width (ie. 'x') */
+ if (ch == '.') {
+ p.lz = 1; /* zero-padding */
+ /* ignore actual 0-fill size: */
+ do {
+ ch = *(fmt++);
+ } while ((ch >= '0') && (ch <= '9'));
+ }
+
+#ifdef PRINTF_SIZE_T_SUPPORT
+# ifdef PRINTF_LONG_SUPPORT
+ if (ch == 'z') {
+ ch = *(fmt++);
+ if (sizeof(size_t) == sizeof(unsigned long int))
+ lng = 1;
+# ifdef PRINTF_LONG_LONG_SUPPORT
+ else if (sizeof(size_t) == sizeof(unsigned long long int))
+ lng = 2;
+# endif
+ } else
+# endif
+#endif
+
+#ifdef PRINTF_LONG_SUPPORT
+ if (ch == 'l') {
+ ch = *(fmt++);
+ lng = 1;
+#ifdef PRINTF_LONG_LONG_SUPPORT
+ if (ch == 'l') {
+ ch = *(fmt++);
+ lng = 2;
+ }
+#endif
+ }
+#endif
+ switch (ch) {
+ case 0:
+ goto abort;
+ case 'u':
+ p.base = 10;
+#ifdef PRINTF_LONG_SUPPORT
+#ifdef PRINTF_LONG_LONG_SUPPORT
+ if (2 == lng)
+ ulli2a(va_arg(va, unsigned long long int), &p);
+ else
+#endif
+ if (1 == lng)
+ uli2a(va_arg(va, unsigned long int), &p);
+ else
+#endif
+ ui2a(va_arg(va, unsigned int), &p);
+ putchw(putp, putf, &p);
+ break;
+ case 'd':
+ case 'i':
+ p.base = 10;
+#ifdef PRINTF_LONG_SUPPORT
+#ifdef PRINTF_LONG_LONG_SUPPORT
+ if (2 == lng)
+ lli2a(va_arg(va, long long int), &p);
+ else
+#endif
+ if (1 == lng)
+ li2a(va_arg(va, long int), &p);
+ else
+#endif
+ i2a(va_arg(va, int), &p);
+ putchw(putp, putf, &p);
+ break;
+#ifdef SIZEOF_POINTER
+ case 'p':
+ p.alt = 1;
+# if defined(SIZEOF_INT) && SIZEOF_POINTER <= SIZEOF_INT
+ lng = 0;
+# elif defined(SIZEOF_LONG) && SIZEOF_POINTER <= SIZEOF_LONG
+ lng = 1;
+# elif defined(SIZEOF_LONG_LONG) && SIZEOF_POINTER <= SIZEOF_LONG_LONG
+ lng = 2;
+# endif
+#endif
+ case 'x':
+ case 'X':
+ p.base = 16;
+ p.uc = (ch == 'X')?1:0;
+#ifdef PRINTF_LONG_SUPPORT
+#ifdef PRINTF_LONG_LONG_SUPPORT
+ if (2 == lng)
+ ulli2a(va_arg(va, unsigned long long int), &p);
+ else
+#endif
+ if (1 == lng)
+ uli2a(va_arg(va, unsigned long int), &p);
+ else
+#endif
+ ui2a(va_arg(va, unsigned int), &p);
+ putchw(putp, putf, &p);
+ break;
+ case 'o':
+ p.base = 8;
+ ui2a(va_arg(va, unsigned int), &p);
+ putchw(putp, putf, &p);
+ break;
+ case 'c':
+ putf(putp, (char)(va_arg(va, int)));
+ break;
+ case 's':
+ p.bf = va_arg(va, char *);
+ putchw(putp, putf, &p);
+ p.bf = bf;
+ break;
+ case '%':
+ putf(putp, ch);
+ default:
+ break;
+ }
+ }
+ }
+ abort:;
+}
+
+#if TINYPRINTF_DEFINE_TFP_PRINTF
+static putcf stdout_putf;
+static void *stdout_putp;
+
+void init_printf(void *putp, putcf putf)
+{
+ stdout_putf = putf;
+ stdout_putp = putp;
+}
+
+void tfp_printf(char *fmt, ...)
+{
+ va_list va;
+ va_start(va, fmt);
+ tfp_format(stdout_putp, stdout_putf, fmt, va);
+ va_end(va);
+}
+#endif
+
+#if TINYPRINTF_DEFINE_TFP_SPRINTF
+struct _vsnprintf_putcf_data
+{
+ size_t dest_capacity;
+ char *dest;
+ size_t num_chars;
+};
+
+static void _vsnprintf_putcf(void *p, char c)
+{
+ struct _vsnprintf_putcf_data *data = (struct _vsnprintf_putcf_data*)p;
+ if (data->num_chars < data->dest_capacity)
+ data->dest[data->num_chars] = c;
+ data->num_chars ++;
+}
+
+int tfp_vsnprintf(char *str, size_t size, const char *format, va_list ap)
+{
+ struct _vsnprintf_putcf_data data;
+
+ if (size < 1)
+ return 0;
+
+ data.dest = str;
+ data.dest_capacity = size-1;
+ data.num_chars = 0;
+ tfp_format(&data, _vsnprintf_putcf, format, ap);
+
+ if (data.num_chars < data.dest_capacity)
+ data.dest[data.num_chars] = '\0';
+ else
+ data.dest[data.dest_capacity] = '\0';
+
+ return data.num_chars;
+}
+
+int tfp_snprintf(char *str, size_t size, const char *format, ...)
+{
+ va_list ap;
+ int retval;
+
+ va_start(ap, format);
+ retval = tfp_vsnprintf(str, size, format, ap);
+ va_end(ap);
+ return retval;
+}
+
+struct _vsprintf_putcf_data
+{
+ char *dest;
+ size_t num_chars;
+};
+
+static void _vsprintf_putcf(void *p, char c)
+{
+ struct _vsprintf_putcf_data *data = (struct _vsprintf_putcf_data*)p;
+ data->dest[data->num_chars++] = c;
+}
+
+int tfp_vsprintf(char *str, const char *format, va_list ap)
+{
+ struct _vsprintf_putcf_data data;
+ data.dest = str;
+ data.num_chars = 0;
+ tfp_format(&data, _vsprintf_putcf, format, ap);
+ data.dest[data.num_chars] = '\0';
+ return data.num_chars;
+}
+
+int tfp_sprintf(char *str, const char *format, ...)
+{
+ va_list ap;
+ int retval;
+
+ va_start(ap, format);
+ retval = tfp_vsprintf(str, format, ap);
+ va_end(ap);
+ return retval;
+}
+#endif
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