X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2F_PDCLIB%2F_PDCLIB_strtox_main.c;fp=functions%2F_PDCLIB%2F_PDCLIB_strtox_main.c;h=86b6d42e18c4f05470a9f06c258de965b200dcf5;hb=3082b97d8f2de1584430ad42671a0e056ed33be4;hp=0000000000000000000000000000000000000000;hpb=d7f27d5325d7c44d93be00662b13aa9ffdec76b1;p=pdclib

diff --git a/functions/_PDCLIB/_PDCLIB_strtox_main.c b/functions/_PDCLIB/_PDCLIB_strtox_main.c
new file mode 100644
index 0000000..86b6d42
--- /dev/null
+++ b/functions/_PDCLIB/_PDCLIB_strtox_main.c
@@ -0,0 +1,87 @@
+/* $Id$ */
+
+/* _PDCLIB_strtox_main( const char * *, int, _PDCLIB_uintmax_t, _PDCLIB_uintmax_t, int )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <stdint.h>
+
+#ifndef REGTEST
+#include <_PDCLIB_int.h>
+_PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, uintmax_t error, uintmax_t limval, int limdigit, char * sign )
+{
+    _PDCLIB_uintmax_t rc = 0;
+    int digit = -1;
+    const char * x;
+    while ( ( x = memchr( _PDCLIB_digits, tolower(**p), base ) ) != NULL )
+    {
+        digit = x - _PDCLIB_digits;
+        if ( ( rc < limval ) || ( ( rc == limval ) && ( digit <= limdigit ) ) )
+        {
+            rc = rc * base + (unsigned)digit;
+            ++(*p);
+        }
+        else
+        {
+            errno = ERANGE;
+            /* TODO: Only if endptr != NULL - but do we really want *another* parameter? */
+            /* TODO: Earlier version was missing tolower() here but was not caught by tests */
+            while ( memchr( _PDCLIB_digits, tolower(**p), base ) != NULL ) ++(*p);
+            /* TODO: This is ugly, but keeps caller from negating the error value */
+            *sign = '+';
+            return error;
+        }
+    }
+    if ( digit == -1 )
+    {
+        *p = NULL;
+        return 0;
+    }
+    return rc;
+}
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <errno.h>
+
+int main( void )
+{
+#ifndef REGTEST
+    const char * p;
+    char test[] = "123_";
+    char fail[] = "xxx";
+    char sign = '-';
+    /* basic functionality */
+    p = test;
+    errno = 0;
+    TESTCASE( _PDCLIB_strtox_main( &p, 10u, (uintmax_t)999, (uintmax_t)12, 3, &sign ) == 123 );
+    TESTCASE( errno == 0 );
+    TESTCASE( p == &test[3] );
+    /* proper functioning to smaller base */
+    p = test;
+    TESTCASE( _PDCLIB_strtox_main( &p, 8u, (uintmax_t)999, (uintmax_t)12, 3, &sign ) == 0123 );
+    TESTCASE( errno == 0 );
+    TESTCASE( p == &test[3] );
+    /* overflowing subject sequence must still return proper endptr */
+    p = test;
+    TESTCASE( _PDCLIB_strtox_main( &p, 4u, (uintmax_t)999, (uintmax_t)1, 2, &sign ) == 999 );
+    TESTCASE( errno == ERANGE );
+    TESTCASE( p == &test[3] );
+    TESTCASE( sign == '+' );
+    /* testing conversion failure */
+    errno = 0;
+    p = fail;
+    sign = '-';
+    TESTCASE( _PDCLIB_strtox_main( &p, 10u, (uintmax_t)999, (uintmax_t)99, 8, &sign ) == 0 );
+    TESTCASE( p == NULL );
+#endif
+    return TEST_RESULTS;
+}
+
+#endif