As we are heavy user of int to string and double to string in the EFL, provide a fast and portable one.

SVN revision: 35604
2008-08-21 14:20:41 +00:00 · 2008-08-21 14:20:41 +00:00 · 4bc094c45a
parent 995ca492e9
commit 4bc094c45a
17 changed files with 2105 additions and 2 deletions
--- a/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.gnuplot
+++ b/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.gnuplot
@ -0,0 +1,15 @@
+set   autoscale                        # scale axes automatically
+unset log                              # remove any log-scaling
+unset label                            # remove any previous labels
+set xtic auto                          # set xtics automatically
+set ytic auto                          # set ytics automatically
+#set logscale y
+set terminal png size 1024,768
+set output "output_Convert_2008-08-21_16:09:46.png"
+set title "Convert 2008-08-21_16:09:46
+set xlabel "tests"
+set ylabel "time"
+plot "bench_Convert_2008-08-21_16:09:46.itoa 10.data" using 1:2 title 'itoa 10' with line, \
+"bench_Convert_2008-08-21_16:09:46.itoa 16.data" using 1:2 title 'itoa 16' with line, \
+"bench_Convert_2008-08-21_16:09:46.snprintf 10.data" using 1:2 title 'snprintf 10' with line, \
+"bench_Convert_2008-08-21_16:09:46.snprintf 16.data" using 1:2 title 'snprintf 16' with line
--- a/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.itoa
+++ b/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.itoa
@ -0,0 +1,399 @@
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--- a/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.itoa
+++ b/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.itoa
@ -0,0 +1,399 @@
+# specimen	experiment time	starting time	ending time
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+199000	7535255	4374231769	4381767024
+199500	7110721	4381774363	4388885084
--- a/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.snprintf
+++ b/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.snprintf
@ -0,0 +1,399 @@
+# specimen	experiment time	starting time	ending time
+1000	199149	4389447448	4389646597
+1500	291127	4389654500	4389945627
+2000	385613	4389952460	4390338073
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--- a/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.snprintf
+++ b/legacy/eina/doc/benchmark/itoa/bench_Convert_2008-08-21_16:09:46.snprintf
@ -0,0 +1,399 @@
+# specimen	experiment time	starting time	ending time
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+198000	32329692	18725601952	18757931644
+198500	32410895	18757936608	18790347503
+199000	32492705	18790352541	18822845246
+199500	32574379	18822850446	18855424825
--- a/legacy/eina/doc/benchmark/itoa/output_Convert_2008-08-21_16:09:46.png
+++ b/legacy/eina/doc/benchmark/itoa/output_Convert_2008-08-21_16:09:46.png
--- a/legacy/eina/src/include/Makefile.am
+++ b/legacy/eina/src/include/Makefile.am
@ -20,6 +20,7 @@ eina_magic.h \
 eina_stringshare.h \
 eina_inline_list.x \
 eina_accessor.h \
+eina_convert.h \
 eina_iterator.h

 installed_mainheaderdir = $(prefix)/include/eina-@VMAJ@
--- a/legacy/eina/src/include/eina_convert.h
+++ b/legacy/eina/src/include/eina_convert.h
@ -0,0 +1,35 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2008 Cedric BAIL, Vincent Torri
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef EINA_CONVERT_H_
+#define EINA_CONVERT_H_
+
+#include "eina_types.h"
+#include "eina_error.h"
+
+EAPI extern Eina_Error EINA_ERROR_CONVERT_P_NOT_FOUND;
+EAPI extern Eina_Error EINA_ERROR_CONVERT_0X_NOT_FOUND;
+EAPI extern Eina_Error EINA_ERROR_CONVERT_OUTRUN_STRING_LENGTH;
+
+EAPI int eina_convert_itoa(int n, char *s);
+EAPI int eina_convert_xtoa(unsigned int n, char *s);
+EAPI int eina_convert_dtoa(double d, char *des);
+EAPI Eina_Bool eina_convert_atod(const char *src, int length, long long *m, long *e);
+
+#endif /* EINA_CONVERT_H_ */
+
--- a/legacy/eina/src/lib/Makefile.am
+++ b/legacy/eina/src/lib/Makefile.am
@ -25,8 +25,9 @@ eina_main.c \
 eina_counter.c \
 eina_iterator.c \
 eina_accessor.c \
+eina_convert.c \
 eina_stringshare.c

-libeina_la_LIBADD = -ldl -lrt @COVERAGE_LIBS@
+libeina_la_LIBADD = -ldl -lrt @COVERAGE_LIBS@ -lm
 libeina_la_LDFLAGS = -no-undefined @lt_enable_auto_import@ -version-info @version_info@
 libeina_la_DEPENDENCIES = $(top_builddir)/config.h
--- a/legacy/eina/src/lib/eina_convert.c
+++ b/legacy/eina/src/lib/eina_convert.c
@ -0,0 +1,297 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2008 Cedric BAIL, Vincent Torri
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "eina_convert.h"
+
+static const char look_up_table[] = {'0', '1', '2', '3', '4',
+				     '5', '6', '7', '8', '9',
+				     'a', 'b', 'c', 'd', 'e', 'f'};
+static int _init_count = 0;
+
+EAPI Eina_Error EINA_ERROR_CONVERT_P_NOT_FOUND = 0;
+EAPI Eina_Error EINA_ERROR_CONVERT_0X_NOT_FOUND = 0;
+EAPI Eina_Error EINA_ERROR_CONVERT_OUTRUN_STRING_LENGTH = 0;
+
+#define HEXA_TO_INT(Hexa) (Hexa >= 'a') ? Hexa - 'a' + 10 : Hexa - '0'
+
+static inline void reverse(char s[], int length)
+{
+   int c, i, j;
+
+   for (i = 0, j = length - 1; i < j; i++, j--)
+     {
+	c = s[i];
+	s[i] = s[j];
+	s[j] = c;
+     }
+}
+
+/*
+ * Come from the second edition of The C Programming Language ("K&R2") on page 64
+ */
+EAPI int
+eina_convert_itoa(int n, char *s)
+{
+   int i = 0;
+   int r = 0;
+
+   if (n < 0)
+     {
+	n = -n;
+	*s++ = '-';
+	r = 1;
+     }
+
+   do {
+      s[i++] = n % 10 + '0';
+   } while ((n /= 10) > 0);
+
+   s[i] = '\0';
+
+   reverse(s, i);
+
+   return i + r;
+}
+
+EAPI int
+eina_convert_xtoa(unsigned int n, char *s)
+{
+   int i;
+
+   i = 0;
+   do {
+      s[i++] = look_up_table[n & 0xF];
+   } while ((n >>= 4) > 0);
+
+   s[i] = '\0';
+
+   reverse(s, i);
+
+   return i;
+}
+
+/* On Windows (using MinGW or VC++), printf-like functions */
+/* rely on MSVCRT, which does not fully support the C99    */
+/* specifications. In particular, they do not support the  */
+/* modifier character %a.                                  */
+EAPI int
+eina_convert_init(void)
+{
+   _init_count++;
+
+   if (_init_count > 1) goto init_out;
+
+   eina_error_init();
+   EINA_ERROR_CONVERT_0X_NOT_FOUND = eina_error_register("Error during string convertion to float, First '0x' was not found.");
+   EINA_ERROR_CONVERT_P_NOT_FOUND = eina_error_register("Error during string convertion to float, First 'p' was not found.");
+   EINA_ERROR_CONVERT_OUTRUN_STRING_LENGTH = eina_error_register("Error outrun string limit during convertion string convertion to float.");
+
+ init_out:
+   return _init_count;
+}
+
+EAPI int
+eina_convert_shutdown(void)
+{
+   _init_count--;
+
+   if (_init_count > 0) goto shutdown_out;
+
+   eina_error_shutdown();
+
+ shutdown_out:
+   return _init_count;
+}
+
+/* That function converts a string created by a valid %a   */
+/* modifier to a double.                                   */
+/*                                                         */
+/* The string must have the following format:              */
+/*                                                         */
+/*  [-]0xh.hhhhhp[+-]e                                     */
+/*                                                         */
+/* where e is a decimal number.                            */
+/* If n is the number of cyphers after the point, the      */
+/* returned mantisse and exponents are                     */
+/*                                                         */
+/*  mantisse: [-]hhhhhh                                    */
+/*  exponent: 2^([+-]e - 4 * n)                            */
+EAPI Eina_Bool
+eina_convert_atod(const char *src, int length, long long *m, long *e)
+{
+   const char *str = src;
+   long long   mantisse;
+   long        exponent;
+   int         nbr_decimals = 0;
+   int         sign = 1;
+
+   if (length <= 0) goto on_length_error;
+
+   /* Compute the mantisse. */
+   if (*str == '-')
+     {
+        sign = -1;
+        str++;
+	length--;
+     }
+
+   if (length <= 2) goto on_length_error;
+
+   if (strncmp(str, "0x", 2))
+     {
+	eina_error_set(EINA_ERROR_CONVERT_0X_NOT_FOUND);
+	EINA_ERROR_PDBG("'0x' not found in '%s'", src);
+        return EINA_FALSE;
+     }
+
+   str += 2;
+   length -= 2;
+
+   mantisse = HEXA_TO_INT(*str);
+
+   str++;
+   length--; if (length <= 0) goto on_length_error;
+
+   if (*str == '.')
+     {
+	for (str++, length--;
+	     length > 0 && *str != 'p';
+	     ++str, --length, ++nbr_decimals)
+          {
+             mantisse <<= 4;
+             mantisse += HEXA_TO_INT(*str);
+          }
+
+	str++;
+	length--; if (length <= 0) goto on_length_error;
+     }
+   if (sign < 0) mantisse = -mantisse;
+
+   /* Compute the exponent. */
+   if (*str != 'p')
+     {
+	eina_error_set(EINA_ERROR_CONVERT_P_NOT_FOUND);
+	EINA_ERROR_PDBG("'p' not found in '%s'", src);
+        return EINA_FALSE;
+     }
+   sign = +1;
+
+   str++;
+   length--; if (length <= 0) goto on_length_error;
+
+   if (strchr("-+", *str))
+     {
+	sign = (*str == '-') ? -1 : +1;
+
+        str++; length--;
+     }
+
+   for (exponent = 0; length > 0 && *str != '\0'; ++str, --length)
+     {
+        exponent *= 10;
+        exponent += *str - '0';
+     }
+
+   if (length <= 0) goto on_length_error;
+
+   if (sign < 0)
+     exponent = -exponent;
+
+   *m = mantisse;
+   *e = exponent - (nbr_decimals << 2);
+
+   return EINA_TRUE;
+
+ on_length_error:
+   eina_error_set(EINA_ERROR_CONVERT_OUTRUN_STRING_LENGTH);
+   return EINA_FALSE;
+}
+
+/* That function converts a double to a string that as the */
+/* following format:                                       */
+/*                                                         */
+/*  [-]0xh.hhhhhp[+-]e                                     */
+/*                                                         */
+/* where h is a hexadecimal number and e a decimal number. */
+EAPI int
+eina_convert_dtoa(double d, char *des)
+{
+   int length = 0;
+   int p;
+   int i;
+
+   if (d < 0.0)
+     {
+        *(des++) = '-';
+        d = -d;
+	length++;
+     }
+
+   d = frexp(d, &p);
+
+   if (p)
+     {
+        d *= 2;
+        p -= 1;
+     }
+
+   *(des++) = '0';
+   *(des++) = 'x';
+   *(des++) = look_up_table[(size_t)d];
+   *(des++) = '.';
+   length += 4;
+
+   for (i = 0; i < 16; i++, length++)
+     {
+        d -= floor(d);
+        d *= 16;
+        *(des++) = look_up_table[(size_t)d];
+     }
+
+   while (*(des - 1) == '0')
+     {
+	des--;
+	length--;
+     }
+
+   if (*(des - 1) == '.')
+     {
+	des--;
+	length--;
+     }
+
+   *(des++) = 'p';
+   if (p < 0)
+     {
+        *(des++) = '-';
+        p = -p;
+     }
+   else
+     *(des++) = '+';
+   length += 2;
+
+   return length + eina_convert_itoa(p, des);
+}
--- a/legacy/eina/src/tests/Makefile.am
+++ b/legacy/eina/src/tests/Makefile.am
@ -29,6 +29,7 @@ eina_test_hash.c 	\
 eina_test_iterator.c	\
 eina_test_accessor.c	\
 eina_test_module.c	\
+eina_test_convert.c	\
 eina_test_list.c

 eina_suite_LDADD = @CHECK_LIBS@ $(top_builddir)/src/lib/libeina.la
@ -43,6 +44,7 @@ eina_bench_SOURCES = 	\
 eina_bench.c 		\
 eina_bench_hash.c 	\
 eina_bench_stringshare.c \
+eina_bench_convert.c	\
 eina_bench_array.c

 eina_bench_LDADD = $(top_builddir)/src/lib/libeina.la
--- a/legacy/eina/src/tests/eina_bench.c
+++ b/legacy/eina/src/tests/eina_bench.c
@ -177,9 +177,10 @@ struct _Eina_Bench_Case
 };

 static const Eina_Bench_Case etc[] = {
-/*   { "Hash", eina_bench_hash }, */
+  { "Hash", eina_bench_hash },
  { "Array vs List vs Inlist", eina_bench_array },
 /*   { "Stringshare", eina_bench_stringshare }, */
+/*   { "Convert", eina_bench_convert }, */
  { NULL, NULL }
 };

--- a/legacy/eina/src/tests/eina_bench.h
+++ b/legacy/eina/src/tests/eina_bench.h
@ -29,5 +29,6 @@ void eina_bench_register(Eina_Bench *bench, const char *name, Eina_Bench_Specime
 void eina_bench_hash(Eina_Bench *bench);
 void eina_bench_array(Eina_Bench *bench);
 void eina_bench_stringshare(Eina_Bench *bench);
+void eina_bench_convert(Eina_Bench *bench);

 #endif
--- a/legacy/eina/src/tests/eina_bench_convert.c
+++ b/legacy/eina/src/tests/eina_bench_convert.c
@ -0,0 +1,92 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2008 Cedric Bail
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <time.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "eina_bench.h"
+#include "eina_convert.h"
+
+static void
+eina_bench_convert_itoa_10(int request)
+{
+   char tmp[128];
+   int i;
+
+   srand(time(NULL));
+
+   for (i = 0; i < request; ++i)
+     {
+	eina_convert_itoa(rand(), tmp);
+     }
+}
+
+static void
+eina_bench_convert_itoa_16(int request)
+{
+   char tmp[128];
+   int i;
+
+   srand(time(NULL));
+
+   for (i = 0; i < request; ++i)
+     {
+	eina_convert_xtoa(rand(), tmp);
+     }
+}
+
+static void
+eina_bench_convert_snprintf_10(int request)
+{
+   char tmp[128];
+   int i;
+
+   srand(time(NULL));
+
+   for (i = 0; i < request; ++i)
+     {
+	snprintf(tmp, 128, "%i", rand());
+     }
+}
+
+static void
+eina_bench_convert_snprintf_x(int request)
+{
+   char tmp[128];
+   int i;
+
+   srand(time(NULL));
+
+   for (i = 0; i < request; ++i)
+     {
+	snprintf(tmp, 128, "%x", rand());
+     }
+}
+
+void eina_bench_convert(Eina_Bench *bench)
+{
+   eina_bench_register(bench, "itoa 10", EINA_BENCH(eina_bench_convert_itoa_10), 1000, 200000, 500);
+   eina_bench_register(bench, "itoa 16", EINA_BENCH(eina_bench_convert_itoa_16), 1000, 200000, 500);
+   eina_bench_register(bench, "snprintf 10", EINA_BENCH(eina_bench_convert_snprintf_10), 1000, 200000, 500);
+   eina_bench_register(bench, "snprintf 16", EINA_BENCH(eina_bench_convert_snprintf_x), 1000, 200000, 500);
+}
+
+
+
+
--- a/legacy/eina/src/tests/eina_suite.c
+++ b/legacy/eina/src/tests/eina_suite.c
@ -39,6 +39,7 @@ static const Eina_Test_Case etc[] = {
  { "Iterator", eina_test_iterator },
  { "Accessor", eina_test_accessor },
  { "Module", eina_test_module },
+  { "Convert", eina_test_convert },
  { NULL, NULL }
 };

--- a/legacy/eina/src/tests/eina_suite.h
+++ b/legacy/eina/src/tests/eina_suite.h
@ -38,5 +38,6 @@ void eina_test_list(TCase *tc);
 void eina_test_iterator(TCase *tc);
 void eina_test_accessor(TCase *tc);
 void eina_test_module(TCase *tc);
+void eina_test_convert(TCase *tc);

 #endif /* EINA_SUITE_H_ */
--- a/legacy/eina/src/tests/eina_test_convert.c
+++ b/legacy/eina/src/tests/eina_test_convert.c
@ -0,0 +1,60 @@
+/* EINA - EFL data type library
+ * Copyright (C) 2008 Cedric Bail
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "eina_convert.h"
+#include "eina_suite.h"
+
+START_TEST(eina_convert_simple)
+{
+   char tmp[128];
+   int length;
+
+   fail_if(eina_convert_itoa(0, tmp) != 1);
+   fail_if(strcmp(tmp, "0") != 0);
+
+   fail_if(eina_convert_itoa(-1, tmp) != 2);
+   fail_if(strcmp(tmp, "-1") != 0);
+
+   fail_if(eina_convert_itoa(100, tmp) != 3);
+   fail_if(strcmp(tmp, "100") != 0);
+
+   fail_if(eina_convert_itoa(-100, tmp) != 4);
+   fail_if(strcmp(tmp, "-100") != 0);
+
+   fail_if(eina_convert_itoa(10000000, tmp) != 8);
+   fail_if(strcmp(tmp, "10000000") != 0);
+
+   fail_if(eina_convert_xtoa(0, tmp) != 1);
+   fail_if(strcmp(tmp, "0") != 0);
+
+   fail_if(eina_convert_xtoa(0xA1, tmp) != 2);
+   fail_if(strcmp(tmp, "a1") != 0);
+
+   fail_if(eina_convert_xtoa(0xFF00EF0E, tmp) != 8);
+   fail_if(strcmp(tmp, "ff00ef0e") != 0);
+}
+END_TEST
+
+void
+eina_test_convert(TCase *tc)
+{
+   tcase_add_test(tc, eina_convert_simple);
+}