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/* -----------------------------------------------------------------------------
* cstring.i
*
* This file provides typemaps and macros for dealing with various forms
* of C character string handling. The primary use of this module
* is in returning character data that has been allocated or changed in
* some way.
* ----------------------------------------------------------------------------- */
/* %cstring_input_binary(TYPEMAP, SIZE)
*
* Macro makes a function accept binary string data along with
* a size.
*/
%define %cstring_input_binary(TYPEMAP, SIZE)
%apply (char *STRING, int LENGTH) { (TYPEMAP, SIZE) };
%enddef
/*
* %cstring_bounded_output(TYPEMAP, MAX)
*
* This macro is used to return a NULL-terminated output string of
* some maximum length. For example:
*
* %cstring_bounded_output(char *outx, 512);
* void foo(char *outx) {
* sprintf(outx,"blah blah\n");
* }
*
*/
%define %cstring_bounded_output(TYPEMAP,MAX)
%typemap(ignore) TYPEMAP(char temp[MAX+1]) {
$1 = ($1_ltype) temp;
}
%typemap(argout) TYPEMAP {
$1[MAX] = 0;
$result = caml_list_append($result,caml_val_string(str));
}
%enddef
/*
* %cstring_chunk_output(TYPEMAP, SIZE)
*
* This macro is used to return a chunk of binary string data.
* Embedded NULLs are okay. For example:
*
* %cstring_chunk_output(char *outx, 512);
* void foo(char *outx) {
* memmove(outx, somedata, 512);
* }
*
*/
%define %cstring_chunk_output(TYPEMAP,SIZE)
%typemap(ignore) TYPEMAP(char temp[SIZE]) {
$1 = ($1_ltype) temp;
}
%typemap(argout) TYPEMAP {
$result = caml_list_append($result,caml_val_string_len($1,SIZE));
}
%enddef
/*
* %cstring_bounded_mutable(TYPEMAP, SIZE)
*
* This macro is used to wrap a string that's going to mutate.
*
* %cstring_bounded_mutable(char *in, 512);
* void foo(in *x) {
* while (*x) {
* *x = toupper(*x);
* x++;
* }
* }
*
*/
%define %cstring_bounded_mutable(TYPEMAP,MAX)
%typemap(in) TYPEMAP(char temp[MAX+1]) {
char *t = (char *)caml_ptr_val($input);
strncpy(temp,t,MAX);
$1 = ($1_ltype) temp;
}
%typemap(argout) TYPEMAP {
$result = caml_list_append($result,caml_val_string_len($1,MAX));
}
%enddef
/*
* %cstring_mutable(TYPEMAP [, expansion])
*
* This macro is used to wrap a string that will mutate in place.
* It may change size up to a user-defined expansion.
*
* %cstring_mutable(char *in);
* void foo(in *x) {
* while (*x) {
* *x = toupper(*x);
* x++;
* }
* }
*
*/
%define %cstring_mutable(TYPEMAP,...)
%typemap(in) TYPEMAP {
char *t = String_val($input);
int n = caml_string_length($input);
$1 = ($1_ltype) t;
#if #__VA_ARGS__ == ""
#ifdef __cplusplus
$1 = ($1_ltype) new char[n+1];
#else
$1 = ($1_ltype) malloc(n+1);
#endif
#else
#ifdef __cplusplus
$1 = ($1_ltype) new char[n+1+__VA_ARGS__];
#else
$1 = ($1_ltype) malloc(n+1+__VA_ARGS__);
#endif
#endif
memmove($1,t,n);
$1[n] = 0;
}
%typemap(argout) TYPEMAP {
$result = caml_list_append($result,caml_val_string($1));
#ifdef __cplusplus
delete[] $1;
#else
free($1);
#endif
}
%enddef
/*
* %cstring_output_maxsize(TYPEMAP, SIZE)
*
* This macro returns data in a string of some user-defined size.
*
* %cstring_output_maxsize(char *outx, int max) {
* void foo(char *outx, int max) {
* sprintf(outx,"blah blah\n");
* }
*/
%define %cstring_output_maxsize(TYPEMAP, SIZE)
%typemap(in) (TYPEMAP, SIZE) {
$2 = caml_val_long($input);
#ifdef __cplusplus
$1 = ($1_ltype) new char[$2+1];
#else
$1 = ($1_ltype) malloc($2+1);
#endif
}
%typemap(argout) (TYPEMAP,SIZE) {
$result = caml_list_append($result,caml_val_string($1));
#ifdef __cplusplus
delete [] $1;
#else
free($1);
#endif
}
%enddef
/*
* %cstring_output_withsize(TYPEMAP, SIZE)
*
* This macro is used to return character data along with a size
* parameter.
*
* %cstring_output_maxsize(char *outx, int *max) {
* void foo(char *outx, int *max) {
* sprintf(outx,"blah blah\n");
* *max = strlen(outx);
* }
*/
%define %cstring_output_withsize(TYPEMAP, SIZE)
%typemap(in) (TYPEMAP, SIZE) {
int n = caml_val_long($input);
#ifdef __cplusplus
$1 = ($1_ltype) new char[n+1];
$2 = ($2_ltype) new $*1_ltype;
#else
$1 = ($1_ltype) malloc(n+1);
$2 = ($2_ltype) malloc(sizeof($*1_ltype));
#endif
*$2 = n;
}
%typemap(argout) (TYPEMAP,SIZE) {
$result = caml_list_append($result,caml_val_string_len($1,$2));
#ifdef __cplusplus
delete [] $1;
delete $2;
#else
free($1);
free($2);
#endif
}
%enddef
/*
* %cstring_output_allocate(TYPEMAP, RELEASE)
*
* This macro is used to return character data that was
* allocated with new or malloc.
*
* %cstring_output_allocated(char **outx, free($1));
* void foo(char **outx) {
* *outx = (char *) malloc(512);
* sprintf(outx,"blah blah\n");
* }
*/
%define %cstring_output_allocate(TYPEMAP, RELEASE)
%typemap(ignore) TYPEMAP($*1_ltype temp = 0) {
$1 = &temp;
}
%typemap(argout) TYPEMAP {
if (*$1) {
$result = caml_list_append($result,caml_val_string($1));
RELEASE;
} else {
$result = caml_list_append($result,caml_val_ptr($1));
}
}
%enddef
/*
* %cstring_output_allocate_size(TYPEMAP, SIZE, RELEASE)
*
* This macro is used to return character data that was
* allocated with new or malloc.
*
* %cstring_output_allocated(char **outx, int *sz, free($1));
* void foo(char **outx, int *sz) {
* *outx = (char *) malloc(512);
* sprintf(outx,"blah blah\n");
* *sz = strlen(outx);
* }
*/
%define %cstring_output_allocate_size(TYPEMAP, SIZE, RELEASE)
%typemap(ignore) (TYPEMAP, SIZE) ($*1_ltype temp = 0, $*2_ltype tempn) {
$1 = &temp;
$2 = &tempn;
}
%typemap(argout)(TYPEMAP,SIZE) {
if (*$1) {
$result = caml_list_append($result,caml_val_string_len($1,$2));
RELEASE;
} else
$result = caml_list_append($result,caml_val_ptr($1));
}
%enddef
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