83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
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#include "factor.h"
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/* Simple wrappers for ANSI C I/O functions, used for bootstrapping.
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The Factor library provides platform-specific code for Unix and Windows
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with many more capabilities.
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Note that c-streams are pretty limited and broken. Namely,
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there is a limit of 1024 characters per line, and lines containing
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\0 are not read fully.
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The native FFI streams in the library don't have this limitation. */
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void init_c_io(void)
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{
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userenv[IN_ENV] = tag_object(alien(stdin));
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userenv[OUT_ENV] = tag_object(alien(stdout));
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}
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void c_stream_error(void)
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{
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CELL error = tag_object(from_c_string(strerror(errno)));
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general_error(ERROR_IO,error);
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}
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void primitive_fopen(void)
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{
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char *path, *mode;
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FILE* file;
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maybe_garbage_collection();
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mode = unbox_c_string();
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path = unbox_c_string();
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file = fopen(path,mode);
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if(file == NULL)
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c_stream_error();
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box_alien(file);
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}
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#define FACTOR_LINE_LEN 1024
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void primitive_fgets(void)
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{
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FILE* file;
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char line[FACTOR_LINE_LEN];
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maybe_garbage_collection();
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file = (FILE*)unbox_alien();
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if(fgets(line,FACTOR_LINE_LEN,file) == NULL)
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{
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if(feof(file))
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dpush(F);
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else
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c_stream_error();
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}
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else
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dpush(tag_object(from_c_string(line)));
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}
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void primitive_fwrite(void)
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{
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FILE* file;
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F_STRING* text;
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maybe_garbage_collection();
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file = (FILE*)unbox_alien();
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text = untag_string(dpop());
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if(fwrite(to_c_string_unchecked(text),1,
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untag_fixnum_fast(text->length),
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file) == 0)
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c_stream_error();
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}
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void primitive_fflush(void)
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{
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FILE* file = (FILE*)unbox_alien();
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fflush(file);
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}
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void primitive_fclose(void)
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{
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FILE* file = (FILE*)unbox_alien();
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fclose(file);
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}
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