summaryrefslogtreecommitdiff
path: root/src/common
diff options
context:
space:
mode:
Diffstat (limited to 'src/common')
-rw-r--r--src/common/Makefile.am1
-rw-r--r--src/common/itoa.c135
-rw-r--r--src/common/itoa.h34
3 files changed, 170 insertions, 0 deletions
diff --git a/src/common/Makefile.am b/src/common/Makefile.am
index 2f6fd6d..4da8170 100644
--- a/src/common/Makefile.am
+++ b/src/common/Makefile.am
@@ -17,6 +17,7 @@ libcommon_la_SOURCES = \
hex.h hex.c \
ibuf.h ibuf.c \
io.h io.c \
+ itoa.h itoa.c \
fnv1a.h fnv1a.c \
leb128.h leb128.c \
macros.h \
diff --git a/src/common/itoa.c b/src/common/itoa.c
new file mode 100644
index 0000000..56fc638
--- /dev/null
+++ b/src/common/itoa.c
@@ -0,0 +1,135 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * itoa.c - conversion d'un nombre en chaîne de caractères
+ *
+ * Copyright (C) 2023 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chrysalide 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chrysalide. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "itoa.h"
+
+
+#include <assert.h>
+#include <malloc.h>
+#include <math.h>
+
+
+
+/******************************************************************************
+* *
+* Paramètres : n = nombre à transformer. *
+* base = base à considérer pour la sortie. *
+* *
+* Description : Convertit une valeur en une forme textuelle. *
+* *
+* Retour : Chaîne de caractères mises en place. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+char *itoa(long long n, unsigned char base)
+{
+ char *result; /* Texte à retourner */
+ size_t size; /* Taille de chaîne en sortie */
+ char *iter; /* Tête d'écriture */
+#ifndef NDEBUG
+ size_t counter; /* Décompte des impressions */
+#endif
+ long long rem; /* Unité à transposer */
+
+ /**
+ * Préparation du stockage de la chaîne finale.
+ */
+
+ if (n == 0)
+ size = 1;
+
+ else if (n < 0)
+ {
+ size = (size_t)(log(-n) / log(base) + 1);
+ size++;
+ }
+ else
+ size = (size_t)(log(n) / log(base) + 1);
+
+ /* '\0' final */
+ size++;
+
+ result = malloc(size);
+ if (result == NULL) goto exit;
+
+ /**
+ * Remplissage avec la valeur textuelle correspondant à la valeur fournie.
+ */
+
+#ifndef NDEBUG
+ counter = 0;
+#endif
+
+ if (n < 0)
+ {
+ result[0] = '-';
+#ifndef NDEBUG
+ counter++;
+#endif
+
+ n *= -1;
+
+ }
+
+ iter = result + size - 1;
+
+ *iter-- = '\0';
+#ifndef NDEBUG
+ counter++;
+#endif
+
+ if (n == 0)
+ {
+ *iter-- = '0';
+#ifndef NDEBUG
+ counter++;
+#endif
+ }
+
+ else
+ while (n > 0)
+ {
+ rem = n % base;
+
+ if (rem >= 10)
+ *iter-- = 'a' + (rem - 10);
+ else
+ *iter-- = '0' + rem;
+
+#ifndef NDEBUG
+ counter++;
+#endif
+
+ n = n / base;
+
+ }
+
+ assert(counter < size);
+
+ exit:
+
+ return result;
+
+}
diff --git a/src/common/itoa.h b/src/common/itoa.h
new file mode 100644
index 0000000..4608a50
--- /dev/null
+++ b/src/common/itoa.h
@@ -0,0 +1,34 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * itoa.h - prototypes pour la conversion d'un nombre en chaîne de caractères
+ *
+ * Copyright (C) 2023 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Chrysalide 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Chrysalide. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _COMMON_ITOA_H
+#define _COMMON_ITOA_H
+
+
+
+/* Convertit une valeur en une forme textuelle. */
+char *itoa(long long, unsigned char);
+
+
+
+#endif /* _COMMON_ITOA_H */