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authorMiles Bader <miles@gnu.org>1995-12-17 08:25:29 +0000
committerMiles Bader <miles@gnu.org>1995-12-17 08:25:29 +0000
commit3fcba19906814e636ee0f2ea69365c82d76738ee (patch)
treef2be932c87d3778a6f36300310e36d2d740769ce /libshouldbeinlibc
parentc8f0d6355524146ffba8ba3ffdabf9935c4c1c27 (diff)
(argz_remove, argz_append, argz_add): New functions, were in envz.c.
(argz_insert): New function.
Diffstat (limited to 'libshouldbeinlibc')
-rw-r--r--libshouldbeinlibc/=argz.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/libshouldbeinlibc/=argz.c b/libshouldbeinlibc/=argz.c
index 90eb233d..d6b4e16f 100644
--- a/libshouldbeinlibc/=argz.c
+++ b/libshouldbeinlibc/=argz.c
@@ -105,3 +105,75 @@ argz_stringify(char *argz, int len, int sep)
*argz++ = sep;
}
}
+
+/* Add BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN. */
+error_t
+argz_append (char **argz, unsigned *argz_len, char *buf, unsigned buf_len)
+{
+ unsigned new_argz_len = *argz_len + buf_len;
+ char *new_argz = realloc (*argz, new_argz_len);
+ if (new_argz)
+ {
+ bcopy (buf, new_argz + *argz_len, buf_len);
+ *argz = new_argz;
+ *argz_len = new_argz_len;
+ return 0;
+ }
+ else
+ return ENOMEM;
+}
+
+/* Add STR to the argz vector in ARGZ & ARGZ_LEN. This should be moved into
+ argz.c in libshouldbelibc. */
+error_t
+argz_add (char **argz, unsigned *argz_len, char *str)
+{
+ return argz_append (argz, argz_len, str, strlen (str) + 1);
+}
+
+/* Remove ENTRY from ARGZ & ARGZ_LEN, if any. */
+void
+argz_remove (char **argz, unsigned *argz_len, char *entry)
+{
+ if (entry)
+ /* Get rid of the old value for NAME. */
+ {
+ unsigned entry_len = strlen (entry) + 1;
+ *argz_len -= entry_len;
+ bcopy (entry + entry_len, entry, *argz_len - (entry - *argz));
+ }
+}
+
+/* Insert ENTRY into ARGZ & ARGZ_LEN at position N. */
+error_t
+argz_insert (char **argz, unsigned *argz_len, unsigned n, char *entry)
+{
+ char *place = *argz;
+ unsigned left = *argz_len;
+ while (n > 0 && left > 0)
+ {
+ int len = strlen (place) + 1;
+ place += len;
+ left -= len;
+ n--;
+ }
+ if (left < 0 || n > 0)
+ return EINVAL;
+ else
+ {
+ unsigned entry_len = strlen (entry) + 1;
+ unsigned new_argz_len = *argz_len + entry_len;
+ char *new_argz = realloc (*argz, new_argz_len);
+ if (new_argz)
+ {
+ place = new_argz + (place - *argz);
+ bcopy (place, place + entry_len, left);
+ bcopy (entry, place, entry_len);
+ *argz = new_argz;
+ *argz_len = new_argz_len;
+ return 0;
+ }
+ else
+ return ENOMEM;
+ }
+}