Diff: fonctions.cpp

Revision:

0:96cf274f19bc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fonctions.cpp	Mon May 23 05:40:11 2011 +0000
@@ -0,0 +1,78 @@
+#include "stdio.h"
+#include "time.h"
+#include "stdlib.h"
+#include "string.h"
+#include "fonctions.h"
+
+// Fonctions permettant de travailler sur les chaines de caractere (source: http://nicolasj.developpez.com/articles/libc/string/#LII-J)
+
+//Fournit l'index d'une sous chaine
+int str_istr (const char *cs, const char *ct) {
+    int index = -1;
+
+    if (cs != NULL && ct != NULL) {
+        char *ptr_pos = NULL;
+
+        ptr_pos = (char*)strstr(cs, ct);
+        if (ptr_pos != NULL) {
+            index = ptr_pos - cs;
+        }
+    }
+    return index;
+}
+
+//Extrait une sous chaine en fonction d'indices limites
+char *str_sub (const char *s, unsigned int start, unsigned int end) {
+    char *new_s = NULL;
+
+    if (s != NULL && start < end) {
+
+        new_s =(char*) malloc (sizeof (*new_s) * (end - start + 2));
+        if (new_s != NULL) {
+            int i;
+
+            for (i = start; i <= end; i++) {
+                new_s[i-start] = s[i];
+            }
+            new_s[i-start] = '\0';
+        } else {
+            fprintf (stderr, "Memoire insuffisante\n");
+            exit (EXIT_FAILURE);
+        }
+    }
+    return new_s;
+}
+
+// Extrait en plusieurs sous chaines en fonction d'une chaine de s&#65533;paration
+char **str_split (char *s, const char *ct) {
+    char **tab = NULL;
+
+    if (s != NULL && ct != NULL) {
+        int i;
+        char *cs = NULL;
+        size_t size = 1;
+        
+        for (i=0;(cs =(char *) strtok (s, ct)); i++) {
+            if (size <= i + 1) {
+                void *tmp = NULL;
+
+
+                size <<= 1;
+                tmp = realloc (tab, sizeof (*tab) * size);
+                if (tmp != NULL) {
+                    tab =(char**) tmp;
+                } else {
+                    fprintf (stderr, "Memoire insuffisante\n");
+                    free (tab);
+                    tab = NULL;
+                    exit (EXIT_FAILURE);
+                }
+            }
+
+            tab[i] = cs;
+            s = NULL;
+        }
+        tab[i] = NULL;
+    }
+    return tab;
+}