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115 lines
3.2 KiB
115 lines
3.2 KiB
#ifndef PREPROCESS_H_
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#define PREPROCESS_H_
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#include <string.h>
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#include "flexbuf.h"
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struct predef
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{
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struct predef *next;
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const char *name;
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const char *def;
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int flags;
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};
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#define PREDEF_FLAG_FREEDEFS 0x01 /* if "name" and "def" should be freed */
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#define MODE_UNKNOWN 0
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#define MODE_UTF8 1
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#define MODE_UTF16 2
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typedef char* (*PreprocessLoadFileFunc)(const char* pFilename, int* pnLength, char** ppFilePath);
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typedef void (*PreprocessFreeFileBufferFunc)(char* buffer);
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struct memoryfile
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{
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char* buffer;
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int length;
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int readoffset;
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char* filepath;
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};
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struct filestate
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{
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struct filestate *next;
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memoryfile *f;
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const char *name;
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int lineno;
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int (*readfunc)(memoryfile *f, char *buf);
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int flags;
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};
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#define FILE_FLAGS_CLOSEFILE 0x01
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struct ifstate
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{
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struct ifstate *next;
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int skip; /* if we are currently skipping code */
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const char *name; /* the name of the file it started in */
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int linenum; /* the line number it started on */
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int skiprest; /* if we have already processed some branch */
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int sawelse; /* if we have already processed a #else */
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};
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struct preprocess
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{
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struct filestate *fil;
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struct flexbuf line;
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struct flexbuf whole;
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struct predef *defs;
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struct ifstate *ifs;
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/* comment handling code */
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const char *linecomment;
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const char *startcomment;
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const char *endcomment;
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int incomment;
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/* error handling code */
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void (*messagefunc)(const char *level, const char *filename, int linenum, const char *msg);
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bool alternate; /* flag to enable alternate preprocessor rules - */
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/* affects #error handling, macro substitution of */
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/* symbols that are "defined" but have no value. */
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};
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#define pp_active(pp) (!((pp)->ifs && (pp)->ifs->skip))
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void pp_setFileFunctions(PreprocessLoadFileFunc pLoadFileFunc, PreprocessFreeFileBufferFunc pFreeFileBufferFunc);
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/* initialize for reading */
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void pp_init(struct preprocess *pp, bool alternate);
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/* push an opened FILE struct */
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void pp_push_file_struct(struct preprocess *pp, memoryfile *f, const char *name);
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/* push a file by name */
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void pp_push_file(struct preprocess *pp, const char *filename);
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/* pop a file (finish processing it) */
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void pp_pop_file(struct preprocess *pp);
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/* set the strings that will be recognized to start line comments and start and end
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multi-line comments; these nest */
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void pp_setcomments(struct preprocess *pp, const char *line, const char *s, const char *e);
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/* define symbol "name" to have "val", or undefine it if val is NULL */
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void pp_define(struct preprocess *pp, const char *name, const char *val);
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/* get the current state of the define stack */
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void *pp_get_define_state(struct preprocess *pp);
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/* restore the define state to the state given by a previous call to get_define_state */
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void pp_restore_define_state(struct preprocess *pp, void *ptr);
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/* clear all the define state */
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void pp_clear_define_state(struct preprocess *pp);
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/* actually perform the preprocessing on all files that have been pushed so far */
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void pp_run(struct preprocess *pp);
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/* finish preprocessing and retrieve the result string */
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char *pp_finish(struct preprocess *pp);
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#endif
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