Separate out qbs, command, and error handling

Moves the qbs, command, and error handling APIs into separate .cpp files
in libqb/src/. This makes only minor changes to the actual code beyond
moving the logic, many global variables are left in place to be dealt
with in further changes.

Fixes: QB64-Phoenix-Edition#146

internal/c/common.h

@@ -100,123 +100,8 @@
 #    define QB_FALSE 0
 #    define QB_TRUE -1
 
-#    define QB_ERROR_NEXT_WITHOUT_FOR 1
-#    define QB_ERROR_SYNTAX_ERROR 2
-#    define QB_ERROR_RETURN_WITHOUT_GOSUB 3
-#    define QB_ERROR_OUT_OF_DATA 4
-#    define QB_ERROR_ILLEGAL_FUNCTION_CALL 5
-#    define QB_ERROR_OVERFLOW 6
-#    define QB_ERROR_OUT_OF_MEMORY 7
-#    define QB_ERROR_LABEL_NOT_DEFINED 8
-#    define QB_ERROR_SUBSCRIPT_OUT_OF_RANGE 9
-#    define QB_ERROR_DUPLICATE_DEFINITION 10
-#    define QB_ERROR_DIVISION_BY_ZERO 11
-#    define QB_ERROR_ILLEGAL_IN_DIRECT_MODE 12
-#    define QB_ERROR_TYPE_MISMATCH 13
-#    define QB_ERROR_OUT_OF_STRING_SPACE 14
-#    define QB_ERROR_STRING_FORMULA_TOO_COMPLEX 16
-#    define QB_ERROR_CANNOT_CONTINUE 17
-#    define QB_ERROR_FUNCTION_NOT_DEFINED 18
-#    define QB_ERROR_NO_RESUME 19
-#    define QB_ERROR_RESUME_WITHOUT_ERROR 20
-#    define QB_ERROR_DEVICE_TIMEOUT 24
-#    define QB_ERROR_DEVICE_FAULT 25
-#    define QB_ERROR_FOR_WITHOUT_NEXT 26
-#    define QB_ERROR_OUT_OF_PAPER 27
-#    define QB_ERROR_WHILE_WITHOUT_WEND 29
-#    define QB_ERROR_WEND_WITHOUT_WHILE 30
-#    define QB_ERROR_DUPLICATE_LABEL 33
-#    define QB_ERROR_SUBPROGRAM_NOT_DEFINED 35
-#    define QB_ERROR_ARGUMENT_COUNT_MISMATCH 37
-#    define QB_ERROR_ARRAY_NOT_DEFINED 38
-#    define QB_ERROR_VARIABLE_REQUIRED 40
-#    define QB_ERROR_FIELD_OVERFLOW 50
-#    define QB_ERROR_INTERNAL_ERROR 51
-#    define QB_ERROR_BAD_FILE_NAME_OR_NUMBER 52
-#    define QB_ERROR_FILE_NOT_FOUND 53
-#    define QB_ERROR_BAD_FILE_MODE 54
-#    define QB_ERROR_FILE_ALREADY_OPEN 55
-#    define QB_ERROR_FIELD_STATEMENT_ACTIVE 56
-#    define QB_ERROR_DEVICE_IO_ERROR 57
-#    define QB_ERROR_FILE_ALREADY_EXISTS 58
-#    define QB_ERROR_BAD_RECORD_LENGTH 59
-#    define QB_ERROR_DISK_FULL 61
-#    define QB_ERROR_INPUT_PAST_END_OF_FILE 62
-#    define QB_ERROR_BAD_RECORD_NUMBER 63
-#    define QB_ERROR_BAD_FILE_NAME 64
-#    define QB_ERROR_TOO_MANY_FILES 67
-#    define QB_ERROR_DEVICE_UNAVAILABLE 68
-#    define QB_ERROR_COMMUNICATION_BUFFER_OVERFLOW 69
-#    define QB_ERROR_PERMISSION_DENIED 70
-#    define QB_ERROR_DISK_NOT_READY 71
-#    define QB_ERROR_DISK_MEDIA_ERROR 72
-#    define QB_ERROR_FEATURE_UNAVAILABLE 73
-#    define QB_ERROR_RENAME_ACROSS_DISKS 74
-#    define QB_ERROR_PATH_FILE_ACCESS_ERROR 75
-#    define QB_ERROR_PATH_NOT_FOUND 76
-#    define QB_ERROR_OUT_OF_STACK_SPACE 256
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL 257
-#    define QB_ERROR_INVALID_HANDLE 258
-#    define QB_ERROR_CANNOT_FIND_DYNAMIC_LIBRARY_FILE 259
-#    define QB_ERROR_FUNCTION_NOT_FOUND_IN_DYNAMIC_LIBRARY 260
-#    define QB_ERROR_FUNCTION_NOT_FOUND_IN_DYNAMIC_LIBRARY_261 261
-#    define QB_ERROR_GL_COMMAND_OUTSIDE_SUB_GL_SCOPE 270
-#    define QB_ERROR_END_SYSTEM_IN_SUB_GL_SCOPE 271
-#    define QB_ERROR_MEMORY_REGION_OUT_OF_RANGE 300
-#    define QB_ERROR_INVALID_SIZE 301
-#    define QB_ERROR_SOURCE_MEMORY_REGION_OUT_OF_RANGE 302
-#    define QB_ERROR_DESTINATION_MEMORY_REGION_OUT_OF_RANGE 303
-#    define QB_ERROR_BOTH_MEMORY_REGIONS_OUT_OF_RANGE 304
-#    define QB_ERROR_SOURCE_MEMORY_FREED 305
-#    define QB_ERROR_DESTINATION_MEMORY_FREED 306
-#    define QB_ERROR_MEMORY_ALREADY_FREED 307
-#    define QB_ERROR_MEMORY_HAS_BEEN_FREED 308
-#    define QB_ERROR_MEMORY_NOT_INITIALIZED 309
-#    define QB_ERROR_SOURCE_MEMORY_NOT_INITIALIZED 310
-#    define QB_ERROR_DESTINATION_MEMORY_NOT_INITIALIZED 311
-#    define QB_ERROR_BOTH_MEMORY_NOT_INITIALIZED 312
-#    define QB_ERROR_BOTH_MEMORY_FREED 313
-#    define QB_ERROR_ASSERT_FAILED 314
-#    define QB_ERROR_ASSERT_FAILED_WITH_DESCRIPTION 315
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_502 502
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_503 503
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_504 504
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_505 505
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_506 506
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_507 507
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_508 508
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_509 509
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_510 510
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_511 511
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_512 512
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_513 513
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_514 514
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_515 515
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_516 516
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_517 517
-#    define QB_ERROR_OUT_OF_MEMORY_FATAL_518 518
-
-// QB64 string descriptor structure
-struct qbs_field {
-    int32 fileno;
-    int64 fileid;
-    int64 size;
-    int64 offset;
-};
-
-struct qbs {
-    uint8 *chr;    // a 32 bit pointer to the string's data
-    int32 len;     // must be signed for comparisons against signed int32s
-    uint8 in_cmem; // set to 1 if in the conventional memory DBLOCK
-    uint16 *cmem_descriptor;
-    uint16 cmem_descriptor_offset;
-    uint32 listi;    // the index in the list of strings that references it
-    uint8 tmp;       // set to 1 if the string can be deleted immediately after being processed
-    uint32 tmplisti; // the index in the list of strings that references it
-    uint8 fixed;     // fixed length string
-    uint8 readonly;  // set to 1 if string is read only
-    qbs_field *field;
-};
+#include "error_handle.h"
+#include "qbs.h"
 
 struct img_struct {
     void *lock_offset;