mirror of https://github.com/uffejakobsen/acme.git
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
// ACME - a crossassembler for producing 6502/65c02/65816/65ce02 code.
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// Copyright (C) 1998-2020 Marco Baye
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// Have a look at "acme.c" for further info
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//
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// Dynamic buffer stuff
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#ifndef dynabuf_H
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#define dynabuf_H
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#include "config.h"
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#include <stdlib.h> // for size_t
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// macros
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#define DYNABUF_APPEND(db, byte) \
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do { \
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if (db->size == db->reserved) \
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dynabuf_enlarge(db); \
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db->buffer[(db->size)++] = byte;\
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} while (0)
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// the next one is dangerous - the buffer location can change when a character
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// is appended. So after calling this, don't change the buffer as long as you
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// use the address.
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#define GLOBALDYNABUF_CURRENT (GlobalDynaBuf->buffer)
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// dynamic buffer structure
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struct dynabuf {
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char *buffer; // pointer to buffer
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size_t size; // size of buffer's used portion
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size_t reserved; // total size of buffer
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};
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// new way of declaration/definition:
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// the small struct above is static, only the buffer itself gets malloc'd (on
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// first "clear").
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#define STRUCT_DYNABUF_REF(name, size) struct dynabuf name[1] = {{NULL, 0, size}}
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// the "[1]" makes sure the name refers to the address and not the struct
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// itself, so existing code where the name referred to a pointer does not need
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// to be changed.
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// variables
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extern struct dynabuf GlobalDynaBuf[1]; // global dynamic buffer
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// TODO - get rid of this, or move to global.c
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// (ensure buffer is ready to use, then) clear dynamic buffer
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#define DYNABUF_CLEAR(db) dynabuf_clear(db) // TODO - remove old macro
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extern void dynabuf_clear(struct dynabuf *db);
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// call whenever buffer is too small
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extern void dynabuf_enlarge(struct dynabuf *db);
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// return malloc'd copy of buffer contents
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extern char *DynaBuf_get_copy(struct dynabuf *db);
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// copy string to buffer (without terminator)
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extern void DynaBuf_add_string(struct dynabuf *db, const char *);
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// converts buffer contents to lower case
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extern void DynaBuf_to_lower(struct dynabuf *target, struct dynabuf *source);
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// add char to buffer
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extern void DynaBuf_append(struct dynabuf *db, char);
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#endif
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