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author | Mystery Man <unknown@mandriva.org> | 2003-04-17 14:51:14 +0000 |
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committer | Mystery Man <unknown@mandriva.org> | 2003-04-17 14:51:14 +0000 |
commit | ef016519fadd0d52908858470a704cce6a8ceeff (patch) | |
tree | 7dda80ef3508a0b6422cc2ea34ce1d933b81f2a4 /mdk-stage1/slang/slpack.c | |
parent | 327bd24f8e4291bd1882de1990dd7339f781a9cb (diff) | |
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This commit was manufactured by cvs2svn to create tag 'V1_1_9_55mdk'.V1_1_9_55mdk
Diffstat (limited to 'mdk-stage1/slang/slpack.c')
-rw-r--r-- | mdk-stage1/slang/slpack.c | 785 |
1 files changed, 0 insertions, 785 deletions
diff --git a/mdk-stage1/slang/slpack.c b/mdk-stage1/slang/slpack.c deleted file mode 100644 index 53ef63643..000000000 --- a/mdk-stage1/slang/slpack.c +++ /dev/null @@ -1,785 +0,0 @@ -/* Pack objects as a binary string */ -/* Copyright (c) 1998, 1999, 2001 John E. Davis - * This file is part of the S-Lang library. - * - * You may distribute under the terms of either the GNU General Public - * License or the Perl Artistic License. - */ -#include "slinclud.h" - -#include <ctype.h> - -#include "slang.h" -#include "_slang.h" - -#ifndef isdigit -# define isdigit(c) (((c)>='0')&&((c)<= '9')) -#endif -#ifndef isspace -# define isspace(c) (((c)==' ') || ((c)=='\t') || ((c)=='\n')) -#endif - -/* format description: - * - * s = string (null padded) - * S = string (space padded) - * c = signed char - * C = unsigned char - * h = short - * H = unsigned short - * i = int - * I = unsigned int - * l = long - * L = unsigned long - * j = 16 bit signed integer (short) - * J = 16 bit unsigned integer (short) - * k = 32 bit signed integer (long) - * K = 32 bit unsigned integer (long) - * f = float (native format) - * F = 32 bit double - * d = double (native format) - * D = 64 bit double - * x = null pad byte - * > = big-endian mode - * < = little-endian mode - * = = native mode - */ - -#define NATIVE_ORDER 0 -#define BIGENDIAN_ORDER 1 -#define LILENDIAN_ORDER 2 -static int Native_Byte_Order = NATIVE_ORDER; - -typedef struct -{ - char format_type; - unsigned char data_type; - unsigned int repeat; - unsigned int sizeof_type; - char pad; - int byteorder; - int is_scalar; -} -Format_Type; - -static int get_int_type_for_size (unsigned int size, unsigned char *s, unsigned char *u) -{ - if (sizeof (int) == size) - { - if (s != NULL) *s = SLANG_INT_TYPE; - if (u != NULL) *u = SLANG_UINT_TYPE; - return 0; - } - - if (sizeof (short) == size) - { - if (s != NULL) *s = SLANG_SHORT_TYPE; - if (u != NULL) *u = SLANG_USHORT_TYPE; - return 1; - } - - if (sizeof (long) == size) - { - if (s != NULL) *s = SLANG_LONG_TYPE; - if (u != NULL) *u = SLANG_ULONG_TYPE; - return 1; - } - - if (s != NULL) *s = 0; - if (u != NULL) *u = 0; - SLang_verror (SL_NOT_IMPLEMENTED, - "This OS does not support a %u byte int", size); - return -1; -} - -static int get_float_type_for_size (unsigned int size, unsigned char *s) -{ - if (sizeof (float) == size) - { - *s = SLANG_FLOAT_TYPE; - return 0; - } - - if (sizeof (double) == size) - { - *s = SLANG_DOUBLE_TYPE; - return 0; - } - - SLang_verror (SL_NOT_IMPLEMENTED, - "This OS does not support a %u byte float", size); - return -1; -} - -static int parse_a_format (char **format, Format_Type *ft) -{ - char *f; - char ch; - unsigned repeat; - - f = *format; - - while (((ch = *f++) != 0) - && isspace (ch)) - ; - - switch (ch) - { - default: - ft->byteorder = NATIVE_ORDER; - break; - - case '=': - ft->byteorder = NATIVE_ORDER; - ch = *f++; - break; - - case '>': - ft->byteorder = BIGENDIAN_ORDER; - ch = *f++; - break; - - case '<': - ft->byteorder = LILENDIAN_ORDER; - ch = *f++; - break; - } - - if (ch == 0) - { - f--; - *format = f; - return 0; - } - - ft->format_type = ch; - ft->repeat = 1; - - if (isdigit (*f)) - { - repeat = (unsigned int) (*f - '0'); - f++; - - while (isdigit (*f)) - { - unsigned int repeat10 = 10 * repeat + (unsigned int)(*f - '0'); - - /* Check overflow */ - if (repeat != repeat10 / 10) - { - SLang_verror (SL_OVERFLOW, - "Repeat count too large in [un]pack format"); - return -1; - } - repeat = repeat10; - f++; - } - ft->repeat = repeat; - } - - *format = f; - - ft->is_scalar = 1; - ft->pad = 0; - - switch (ft->format_type) - { - default: - SLang_verror (SL_NOT_IMPLEMENTED, - "[un]pack format character '%c' not supported", ft->format_type); - return -1; - - case 'D': - ft->sizeof_type = 8; - if (-1 == get_float_type_for_size (8, &ft->data_type)) - return -1; - break; - - case 'd': - ft->data_type = SLANG_DOUBLE_TYPE; - ft->sizeof_type = sizeof (double); - break; - - case 'F': - ft->sizeof_type = 4; - if (-1 == get_float_type_for_size (4, &ft->data_type)) - return -1; - break; - case 'f': - ft->data_type = SLANG_FLOAT_TYPE; - ft->sizeof_type = sizeof (float); - break; - - case 'h': - ft->data_type = SLANG_SHORT_TYPE; - ft->sizeof_type = sizeof (short); - break; - case 'H': - ft->data_type = SLANG_USHORT_TYPE; - ft->sizeof_type = sizeof (unsigned short); - break; - case 'i': - ft->data_type = SLANG_INT_TYPE; - ft->sizeof_type = sizeof (int); - break; - case 'I': - ft->data_type = SLANG_UINT_TYPE; - ft->sizeof_type = sizeof (unsigned int); - break; - case 'l': - ft->data_type = SLANG_LONG_TYPE; - ft->sizeof_type = sizeof (long); - break; - case 'L': - ft->data_type = SLANG_ULONG_TYPE; - ft->sizeof_type = sizeof (unsigned long); - break; - - /* 16 bit ints */ - case 'j': - ft->sizeof_type = 2; - if (-1 == get_int_type_for_size (2, &ft->data_type, NULL)) - return -1; - break; - case 'J': - ft->sizeof_type = 2; - if (-1 == get_int_type_for_size (2, NULL, &ft->data_type)) - return -1; - break; - - /* 32 bit ints */ - case 'k': - ft->sizeof_type = 4; - if (-1 == get_int_type_for_size (4, &ft->data_type, NULL)) - return -1; - break; - case 'K': - ft->sizeof_type = 4; - if (-1 == get_int_type_for_size (4, NULL, &ft->data_type)) - return -1; - break; - - case 'x': - ft->sizeof_type = 1; - ft->data_type = 0; - break; - - case 'c': - ft->sizeof_type = 1; - ft->data_type = SLANG_CHAR_TYPE; - break; - - case 'C': - ft->data_type = SLANG_UCHAR_TYPE; - ft->sizeof_type = 1; - break; - - case 'S': - case 'A': - ft->pad = ' '; - case 'a': - case 's': - ft->data_type = SLANG_BSTRING_TYPE; - ft->sizeof_type = 1; - ft->is_scalar = 0; - break; - } - return 1; -} - -static int compute_size_for_format (char *format, unsigned int *num_bytes) -{ - unsigned int size; - Format_Type ft; - int status; - - *num_bytes = size = 0; - - while (1 == (status = parse_a_format (&format, &ft))) - size += ft.repeat * ft.sizeof_type; - - *num_bytes = size; - return status; -} - -static void byte_swap64 (unsigned char *ss, unsigned int n) /*{{{*/ -{ - unsigned char *p, *pmax, ch; - - if (n == 0) return; - p = (unsigned char *) ss; - pmax = p + 8 * n; - while (p < pmax) - { - ch = *p; - *p = *(p + 7); - *(p + 7) = ch; - - ch = *(p + 6); - *(p + 6) = *(p + 1); - *(p + 1) = ch; - - ch = *(p + 5); - *(p + 5) = *(p + 2); - *(p + 2) = ch; - - ch = *(p + 4); - *(p + 4) = *(p + 3); - *(p + 3) = ch; - - p += 8; - } -} - -/*}}}*/ -static void byte_swap32 (unsigned char *ss, unsigned int n) /*{{{*/ -{ - unsigned char *p, *pmax, ch; - - p = (unsigned char *) ss; - pmax = p + 4 * n; - while (p < pmax) - { - ch = *p; - *p = *(p + 3); - *(p + 3) = ch; - - ch = *(p + 1); - *(p + 1) = *(p + 2); - *(p + 2) = ch; - p += 4; - } -} - -/*}}}*/ -static void byte_swap16 (unsigned char *p, unsigned int nread) /*{{{*/ -{ - unsigned char *pmax, ch; - - pmax = p + 2 * nread; - while (p < pmax) - { - ch = *p; - *p = *(p + 1); - *(p + 1) = ch; - p += 2; - } -} - -/*}}}*/ - -static int byteswap (int order, unsigned char *b, unsigned int size, unsigned int num) -{ - if (Native_Byte_Order == order) - return 0; - - switch (size) - { - case 2: - byte_swap16 (b, num); - break; - case 4: - byte_swap32 (b, num); - break; - case 8: - byte_swap64 (b, num); - break; - default: - return -1; - } - - return 0; -} - -static void check_native_byte_order (void) -{ - unsigned short x; - - if (Native_Byte_Order != NATIVE_ORDER) - return; - - x = 0xFF; - if (*(unsigned char *)&x == 0xFF) - Native_Byte_Order = LILENDIAN_ORDER; - else - Native_Byte_Order = BIGENDIAN_ORDER; -} - -static SLang_BString_Type * -pack_according_to_format (char *format, unsigned int nitems) -{ - unsigned int size, num; - unsigned char *buf, *b; - SLang_BString_Type *bs; - Format_Type ft; - - buf = NULL; - - if (-1 == compute_size_for_format (format, &size)) - goto return_error; - - if (NULL == (buf = (unsigned char *) SLmalloc (size + 1))) - goto return_error; - - b = buf; - - while (1 == parse_a_format (&format, &ft)) - { - unsigned char *ptr; - unsigned int repeat; - - repeat = ft.repeat; - if (ft.data_type == 0) - { - memset ((char *) b, ft.pad, repeat); - b += repeat; - continue; - } - - if (ft.is_scalar) - { - unsigned char *bstart; - num = repeat; - - bstart = b; - while (repeat != 0) - { - unsigned int nelements; - SLang_Array_Type *at; - - if (nitems == 0) - { - SLang_verror (SL_INVALID_PARM, - "Not enough items for pack format"); - goto return_error; - } - - if (-1 == SLang_pop_array_of_type (&at, ft.data_type)) - goto return_error; - - nelements = at->num_elements; - if (repeat < nelements) - nelements = repeat; - repeat -= nelements; - - nelements = nelements * ft.sizeof_type; - memcpy ((char *)b, (char *)at->data, nelements); - - b += nelements; - SLang_free_array (at); - nitems--; - } - - if (ft.byteorder != NATIVE_ORDER) - byteswap (ft.byteorder, bstart, ft.sizeof_type, num); - - continue; - } - - /* Otherwise we have a string */ - if (-1 == SLang_pop_bstring (&bs)) - goto return_error; - - ptr = SLbstring_get_pointer (bs, &num); - if (repeat < num) num = repeat; - memcpy ((char *)b, (char *)ptr, num); - b += num; - repeat -= num; - memset ((char *)b, ft.pad, repeat); - SLbstring_free (bs); - b += repeat; - nitems--; - } - - *b = 0; - bs = SLbstring_create_malloced (buf, size, 0); - if (bs == NULL) - goto return_error; - - SLdo_pop_n (nitems); - return bs; - - return_error: - SLdo_pop_n (nitems); - if (buf != NULL) - SLfree ((char *) buf); - - return NULL; -} - -void _SLpack (void) -{ - SLang_BString_Type *bs; - char *fmt; - int nitems; - - check_native_byte_order (); - - nitems = SLang_Num_Function_Args; - if (nitems <= 0) - { - SLang_verror (SL_SYNTAX_ERROR, - "pack: not enough arguments"); - return; - } - - if ((-1 == SLreverse_stack (nitems)) - || (-1 == SLang_pop_slstring (&fmt))) - bs = NULL; - else - { - bs = pack_according_to_format (fmt, (unsigned int)nitems - 1); - SLang_free_slstring (fmt); - } - - SLang_push_bstring (bs); - SLbstring_free (bs); -} - -void _SLunpack (char *format, SLang_BString_Type *bs) -{ - Format_Type ft; - unsigned char *b; - unsigned int len; - unsigned int num_bytes; - - check_native_byte_order (); - - if (-1 == compute_size_for_format (format, &num_bytes)) - return; - - b = SLbstring_get_pointer (bs, &len); - if (b == NULL) - return; - - if (len < num_bytes) - { - SLang_verror (SL_INVALID_PARM, - "unpack format %s is too large for input string", - format); - return; - } - - while (1 == parse_a_format (&format, &ft)) - { - char *str, *s; - - if (ft.repeat == 0) - continue; - - if (ft.data_type == 0) - { /* skip padding */ - b += ft.repeat; - continue; - } - - if (ft.is_scalar) - { - SLang_Array_Type *at; - int dims; - - if (ft.repeat == 1) - { - SLang_Class_Type *cl; - - cl = _SLclass_get_class (ft.data_type); - memcpy ((char *)cl->cl_transfer_buf, (char *)b, ft.sizeof_type); - if (ft.byteorder != NATIVE_ORDER) - byteswap (ft.byteorder, (unsigned char *)cl->cl_transfer_buf, ft.sizeof_type, 1); - - if (-1 == (cl->cl_apush (ft.data_type, cl->cl_transfer_buf))) - return; - b += ft.sizeof_type; - continue; - } - - dims = (int) ft.repeat; - at = SLang_create_array (ft.data_type, 0, NULL, &dims, 1); - if (at == NULL) - return; - - num_bytes = ft.repeat * ft.sizeof_type; - memcpy ((char *)at->data, (char *)b, num_bytes); - if (ft.byteorder != NATIVE_ORDER) - byteswap (ft.byteorder, (unsigned char *)at->data, ft.sizeof_type, ft.repeat); - - if (-1 == SLang_push_array (at, 1)) - return; - - b += num_bytes; - continue; - } - - len = ft.repeat; - str = SLmalloc (len + 1); - if (str == NULL) - return; - - memcpy ((char *) str, (char *)b, len); - str [len] = 0; - - if (ft.pad == ' ') - { - unsigned int new_len; - - s = str + len; - while (s > str) - { - s--; - if ((*s != ' ') && (*s != 0)) - { - s++; - break; - } - *s = 0; - } - new_len = (unsigned int) (s - str); - - if (new_len != len) - { - s = SLrealloc (str, new_len + 1); - if (s == NULL) - { - SLfree (str); - return; - } - str = s; - len = new_len; - } - } - - /* Avoid a bstring if possible */ - s = SLmemchr (str, 0, len); - if (s == NULL) - { - if (-1 == SLang_push_malloced_string (str)) - return; - } - else - { - SLang_BString_Type *new_bs; - - new_bs = SLbstring_create_malloced ((unsigned char *)str, len, 1); - if (new_bs == NULL) - return; - - if (-1 == SLang_push_bstring (new_bs)) - { - SLfree (str); - return; - } - SLbstring_free (new_bs); - } - - b += ft.repeat; - } -} - -unsigned int _SLpack_compute_size (char *format) -{ - unsigned int n; - - n = 0; - (void) compute_size_for_format (format, &n); - return n; -} - -void _SLpack_pad_format (char *format) -{ - unsigned int len, max_len; - Format_Type ft; - char *buf, *b; - - check_native_byte_order (); - - /* Just check the syntax */ - if (-1 == compute_size_for_format (format, &max_len)) - return; - - /* This should be sufficient to handle any needed xyy padding characters. - * I cannot see how this will be overrun - */ - max_len = 4 * (strlen (format) + 1); - if (NULL == (buf = SLmalloc (max_len + 1))) - return; - - b = buf; - len = 0; - while (1 == parse_a_format (&format, &ft)) - { - struct { char a; short b; } s_h; - struct { char a; int b; } s_i; - struct { char a; long b; } s_l; - struct { char a; float b; } s_f; - struct { char a; double b; } s_d; - unsigned int pad; - - if (ft.repeat == 0) - continue; - - if (ft.data_type == 0) - { /* pad */ - sprintf (b, "x%u", ft.repeat); - b += strlen (b); - len += ft.repeat; - continue; - } - - switch (ft.data_type) - { - default: - case SLANG_STRING_TYPE: - case SLANG_BSTRING_TYPE: - case SLANG_CHAR_TYPE: - case SLANG_UCHAR_TYPE: - pad = 0; - break; - - case SLANG_SHORT_TYPE: - case SLANG_USHORT_TYPE: - pad = ((unsigned int) ((char *)&s_h.b - (char *)&s_h.a)); - break; - - case SLANG_INT_TYPE: - case SLANG_UINT_TYPE: - pad = ((unsigned int) ((char *)&s_i.b - (char *)&s_i.a)); - break; - - case SLANG_LONG_TYPE: - case SLANG_ULONG_TYPE: - pad = ((unsigned int) ((char *)&s_l.b - (char *)&s_l.a)); - break; - - case SLANG_FLOAT_TYPE: - pad = ((unsigned int) ((char *)&s_f.b - (char *)&s_f.a)); - break; - - case SLANG_DOUBLE_TYPE: - pad = ((unsigned int) ((char *)&s_d.b - (char *)&s_d.a)); - break; - } - - /* Pad to a length that is an integer multiple of pad. */ - if (pad) - pad = pad * ((len + pad - 1)/pad) - len; - - if (pad) - { - sprintf (b, "x%u", pad); - b += strlen (b); - len += pad; - } - - *b++ = ft.format_type; - if (ft.repeat > 1) - { - sprintf (b, "%u", ft.repeat); - b += strlen (b); - } - - len += ft.repeat * ft.sizeof_type; - } - *b = 0; - - (void) SLang_push_malloced_string (buf); -} |