625 lines
16 KiB
Plaintext
625 lines
16 KiB
Plaintext
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/*
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* Wrc preprocessor syntax analysis
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*
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* Copyright 1999-2000 Bertho A. Stultiens (BS)
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*
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* 24-Apr-2000 BS Restructured the lot to fit the new scanner
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* and reintegrate into the wine-tree.
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* 01-Jan-2000 BS FIXME: win16 preprocessor calculates with
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* 16 bit ints and overflows...?
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* 26-Dec-1999 BS Started this file
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*
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*/
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%{
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <assert.h>
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#include <ctype.h>
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#include <string.h>
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#include "utils.h"
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#include "newstruc.h"
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#include "wrc.h"
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#include "preproc.h"
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#define UNARY_OP(r, v, OP) \
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switch(v.type) \
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{ \
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case cv_sint: r.val.si = OP v.val.si; break; \
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case cv_uint: r.val.ui = OP v.val.ui; break; \
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case cv_slong: r.val.sl = OP v.val.sl; break; \
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case cv_ulong: r.val.ul = OP v.val.ul; break; \
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case cv_sll: r.val.sll = OP v.val.sll; break; \
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case cv_ull: r.val.ull = OP v.val.ull; break; \
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}
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#define cv_signed(v) ((v.type & FLAG_SIGNED) != 0)
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#define BIN_OP_INT(r, v1, v2, OP) \
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r.type = v1.type; \
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if(cv_signed(v1) && cv_signed(v2)) \
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r.val.si = v1.val.si OP v2.val.si; \
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else if(cv_signed(v1) && !cv_signed(v2)) \
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r.val.si = v1.val.si OP v2.val.ui; \
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else if(!cv_signed(v1) && cv_signed(v2)) \
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r.val.ui = v1.val.ui OP v2.val.si; \
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else \
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r.val.ui = v1.val.ui OP v2.val.ui;
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#define BIN_OP_LONG(r, v1, v2, OP) \
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r.type = v1.type; \
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if(cv_signed(v1) && cv_signed(v2)) \
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r.val.sl = v1.val.sl OP v2.val.sl; \
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else if(cv_signed(v1) && !cv_signed(v2)) \
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r.val.sl = v1.val.sl OP v2.val.ul; \
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else if(!cv_signed(v1) && cv_signed(v2)) \
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r.val.ul = v1.val.ul OP v2.val.sl; \
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else \
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r.val.ul = v1.val.ul OP v2.val.ul;
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#define BIN_OP_LONGLONG(r, v1, v2, OP) \
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r.type = v1.type; \
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if(cv_signed(v1) && cv_signed(v2)) \
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r.val.sll = v1.val.sll OP v2.val.sll; \
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else if(cv_signed(v1) && !cv_signed(v2)) \
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r.val.sll = v1.val.sll OP v2.val.ull; \
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else if(!cv_signed(v1) && cv_signed(v2)) \
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r.val.ull = v1.val.ull OP v2.val.sll; \
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else \
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r.val.ull = v1.val.ull OP v2.val.ull;
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#define BIN_OP(r, v1, v2, OP) \
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switch(v1.type & SIZE_MASK) \
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{ \
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case SIZE_INT: BIN_OP_INT(r, v1, v2, OP); break; \
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case SIZE_LONG: BIN_OP_LONG(r, v1, v2, OP); break; \
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case SIZE_LONGLONG: BIN_OP_LONGLONG(r, v1, v2, OP); break; \
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default: internal_error(__FILE__, __LINE__, "Invalid type indicator (0x%04x)", v1.type); \
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}
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/*
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* Prototypes
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*/
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static int boolean(cval_t *v);
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static void promote_equal_size(cval_t *v1, cval_t *v2);
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static void cast_to_sint(cval_t *v);
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static void cast_to_uint(cval_t *v);
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static void cast_to_slong(cval_t *v);
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static void cast_to_ulong(cval_t *v);
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static void cast_to_sll(cval_t *v);
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static void cast_to_ull(cval_t *v);
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static marg_t *new_marg(char *str, def_arg_t type);
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static marg_t *add_new_marg(char *str, def_arg_t type);
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static int marg_index(char *id);
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static mtext_t *new_mtext(char *str, int idx, def_exp_t type);
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static mtext_t *combine_mtext(mtext_t *tail, mtext_t *mtp);
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static char *merge_text(char *s1, char *s2);
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/*
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* Local variables
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*/
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static marg_t **macro_args; /* Macro parameters array while parsing */
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static int nmacro_args;
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%}
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%union{
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int sint;
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unsigned int uint;
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long slong;
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unsigned long ulong;
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wrc_sll_t sll;
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wrc_ull_t ull;
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int *iptr;
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char *cptr;
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cval_t cval;
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marg_t *marg;
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mtext_t *mtext;
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}
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%token tIF tIFDEF tIFNDEF tELSE tELIF tENDIF tDEFINED tNL
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%token tINCLUDE tLINE tGCCLINE tERROR tWARNING tPRAGMA tPPIDENT
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%token tUNDEF tMACROEND tCONCAT tELIPSIS tSTRINGIZE
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%token <cptr> tIDENT tLITERAL tMACRO tDEFINE
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%token <cptr> tDQSTRING tSQSTRING tIQSTRING
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%token <uint> tUINT
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%token <sint> tSINT
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%token <ulong> tULONG
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%token <slong> tSLONG
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%token <ull> tULONGLONG
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%token <sll> tSLONGLONG
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%right '?' ':'
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%left tLOGOR
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%left tLOGAND
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%left '|'
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%left '^'
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%left '&'
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%left tEQ tNE
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%left '<' tLTE '>' tGTE
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%left tLSHIFT tRSHIFT
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%left '+' '-'
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%left '*' '/'
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%right '~' '!'
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%type <cval> pp_expr
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%type <marg> emargs margs
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%type <mtext> opt_mtexts mtexts mtext
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%type <sint> nums allmargs
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%type <cptr> opt_text text
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/*
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**************************************************************************
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* The parser starts here
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**************************************************************************
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*/
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%%
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pp_file : /* Empty */
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| pp_file preprocessor
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;
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preprocessor
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: tINCLUDE tDQSTRING tNL { do_include($2, 1); }
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| tINCLUDE tIQSTRING tNL { do_include($2, 0); }
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| tIF pp_expr tNL { next_if_state(boolean(&$2)); }
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| tIFDEF tIDENT tNL { next_if_state(pplookup($2) != NULL); free($2); }
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| tIFNDEF tIDENT tNL {
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int t = pplookup($2) == NULL;
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if(include_state == 0 && t && !seen_junk)
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{
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include_state = 1;
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include_ppp = $2;
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include_ifdepth = get_if_depth();
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}
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else if(include_state != 1)
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{
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include_state = -1;
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free($2);
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}
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else
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free($2);
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next_if_state(t);
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if(debuglevel & DEBUGLEVEL_PPMSG)
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fprintf(stderr, "tIFNDEF: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n", input_name, line_number, include_state, include_ppp, include_ifdepth);
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}
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| tELIF pp_expr tNL {
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if_state_t s = pop_if();
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switch(s)
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{
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case if_true:
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case if_elif:
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push_if(if_elif);
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break;
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case if_false:
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push_if(boolean(&$2) ? if_true : if_false);
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break;
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case if_ignore:
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push_if(if_ignore);
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break;
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case if_elsetrue:
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case if_elsefalse:
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pperror("#elif cannot follow #else");
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default:
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internal_error(__FILE__, __LINE__, "Invalid if_state (%d) in #elif directive", s);
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}
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}
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| tELSE tNL {
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if_state_t s = pop_if();
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switch(s)
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{
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case if_true:
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push_if(if_elsefalse);
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break;
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case if_elif:
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push_if(if_elif);
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break;
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case if_false:
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push_if(if_elsetrue);
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break;
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case if_ignore:
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push_if(if_ignore);
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break;
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case if_elsetrue:
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case if_elsefalse:
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pperror("#else clause already defined");
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default:
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internal_error(__FILE__, __LINE__, "Invalid if_state (%d) in #else directive", s);
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}
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}
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| tENDIF tNL {
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pop_if();
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if(include_ifdepth == get_if_depth() && include_state == 1)
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{
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include_state = 2;
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seen_junk = 0;
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}
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else if(include_state != 1)
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{
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include_state = -1;
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}
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if(debuglevel & DEBUGLEVEL_PPMSG)
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fprintf(stderr, "tENDIF: %s:%d: include_state=%d, include_ppp='%s', include_ifdepth=%d\n", input_name, line_number, include_state, include_ppp, include_ifdepth);
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}
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| tUNDEF tIDENT tNL { del_define($2); free($2); }
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| tDEFINE opt_text tNL { add_define($1, $2); }
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| tMACRO res_arg allmargs tMACROEND opt_mtexts tNL {
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add_macro($1, macro_args, nmacro_args, $5);
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}
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| tLINE tSINT tDQSTRING tNL { fprintf(ppout, "# %d %s\n", $2 - 1, $3); free($3); }
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| tGCCLINE tDQSTRING nums tNL { fprintf(ppout, "# %d %s\n", $3 - 1, $2); free($2); }
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| tGCCLINE tNL /* The null-token */
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| tERROR opt_text tNL { pperror("#error directive: '%s'", $2); if($2) free($2); }
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| tWARNING opt_text tNL { ppwarning("#warning directive: '%s'", $2); if($2) free($2); }
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| tPRAGMA opt_text tNL { if(pedantic) ppwarning("#pragma ignored (arg: '%s')", $2); if($2) free($2); }
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| tPPIDENT opt_text tNL { if(pedantic) ppwarning("#ident ignored (arg: '%s')", $2); if($2) free($2); }
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/*| tNL*/
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;
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opt_text: /* Empty */ { $$ = NULL; }
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| text { $$ = $1; }
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;
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text : tLITERAL { $$ = $1; }
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| tDQSTRING { $$ = $1; }
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| tSQSTRING { $$ = $1; }
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| text tLITERAL { $$ = merge_text($1, $2); }
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| text tDQSTRING { $$ = merge_text($1, $2); }
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| text tSQSTRING { $$ = merge_text($1, $2); }
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;
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res_arg : /* Empty */ { macro_args = NULL; nmacro_args = 0; }
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;
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nums : tSINT { $$ = $1; }
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| nums tSINT /* Ignore */
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;
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allmargs: /* Empty */ { $$ = 0; macro_args = NULL; nmacro_args = 0; }
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| emargs { $$ = nmacro_args; }
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;
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emargs : margs { $$ = $1; }
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| margs ',' tELIPSIS { $$ = add_new_marg(NULL, arg_list); nmacro_args *= -1; }
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;
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margs : margs ',' tIDENT { $$ = add_new_marg($3, arg_single); }
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| tIDENT { $$ = add_new_marg($1, arg_single); }
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;
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opt_mtexts
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: /* Empty */ { $$ = NULL; }
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| mtexts {
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for($$ = $1; $$ && $$->prev; $$ = $$->prev)
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;
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}
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;
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mtexts : mtext { $$ = $1; }
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| mtexts mtext { $$ = combine_mtext($1, $2); }
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;
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mtext : tLITERAL { $$ = new_mtext($1, 0, exp_text); }
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| tDQSTRING { $$ = new_mtext($1, 0, exp_text); }
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| tSQSTRING { $$ = new_mtext($1, 0, exp_text); }
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| tCONCAT { $$ = new_mtext(NULL, 0, exp_concat); }
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| tSTRINGIZE tIDENT {
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int mat = marg_index($2);
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if(mat < 0)
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pperror("Stringification identifier must be an argument parameter");
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$$ = new_mtext(NULL, mat, exp_stringize);
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}
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| tIDENT {
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int mat = marg_index($1);
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if(mat >= 0)
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$$ = new_mtext(NULL, mat, exp_subst);
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else
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$$ = new_mtext($1, 0, exp_text);
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}
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;
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pp_expr : tSINT { $$.type = cv_sint; $$.val.si = $1; }
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| tUINT { $$.type = cv_uint; $$.val.ui = $1; }
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| tSLONG { $$.type = cv_slong; $$.val.sl = $1; }
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| tULONG { $$.type = cv_ulong; $$.val.ul = $1; }
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| tSLONGLONG { $$.type = cv_sll; $$.val.sl = $1; }
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| tULONGLONG { $$.type = cv_ull; $$.val.ul = $1; }
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| tDEFINED tIDENT { $$.type = cv_sint; $$.val.si = pplookup($2) != NULL; }
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| tDEFINED '(' tIDENT ')' { $$.type = cv_sint; $$.val.si = pplookup($3) != NULL; }
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| tIDENT { $$.type = cv_sint; $$.val.si = 0; }
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| pp_expr tLOGOR pp_expr { $$.type = cv_sint; $$.val.si = boolean(&$1) || boolean(&$3); }
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|
|
| pp_expr tLOGAND pp_expr { $$.type = cv_sint; $$.val.si = boolean(&$1) && boolean(&$3); }
|
||
|
|
| pp_expr tEQ pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, ==) }
|
||
|
|
| pp_expr tNE pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, !=) }
|
||
|
|
| pp_expr '<' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, <) }
|
||
|
|
| pp_expr '>' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, >) }
|
||
|
|
| pp_expr tLTE pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, <=) }
|
||
|
|
| pp_expr tGTE pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, >=) }
|
||
|
|
| pp_expr '+' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, +) }
|
||
|
|
| pp_expr '-' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, -) }
|
||
|
|
| pp_expr '^' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, ^) }
|
||
|
|
| pp_expr '&' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, &) }
|
||
|
|
| pp_expr '|' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, |) }
|
||
|
|
| pp_expr '*' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, *) }
|
||
|
|
| pp_expr '/' pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, /) }
|
||
|
|
| pp_expr tLSHIFT pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, <<) }
|
||
|
|
| pp_expr tRSHIFT pp_expr { promote_equal_size(&$1, &$3); BIN_OP($$, $1, $3, >>) }
|
||
|
|
| '+' pp_expr { $$ = $2; }
|
||
|
|
| '-' pp_expr { UNARY_OP($$, $2, -) }
|
||
|
|
| '~' pp_expr { UNARY_OP($$, $2, ~) }
|
||
|
|
| '!' pp_expr { $$.type = cv_sint; $$.val.si = !boolean(&$2) }
|
||
|
|
| '(' pp_expr ')' { $$ = $2; }
|
||
|
|
| pp_expr '?' pp_expr ':' pp_expr { $$ = boolean(&$1) ? $3 : $5; }
|
||
|
|
;
|
||
|
|
|
||
|
|
%%
|
||
|
|
|
||
|
|
/*
|
||
|
|
**************************************************************************
|
||
|
|
* Support functions
|
||
|
|
**************************************************************************
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void cast_to_sint(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: break;
|
||
|
|
case cv_uint: break;
|
||
|
|
case cv_slong: v->val.si = v->val.sl; break;
|
||
|
|
case cv_ulong: v->val.si = v->val.ul; break;
|
||
|
|
case cv_sll: v->val.si = v->val.sll; break;
|
||
|
|
case cv_ull: v->val.si = v->val.ull; break;
|
||
|
|
}
|
||
|
|
v->type = cv_sint;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cast_to_uint(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: break;
|
||
|
|
case cv_uint: break;
|
||
|
|
case cv_slong: v->val.ui = v->val.sl; break;
|
||
|
|
case cv_ulong: v->val.ui = v->val.ul; break;
|
||
|
|
case cv_sll: v->val.ui = v->val.sll; break;
|
||
|
|
case cv_ull: v->val.ui = v->val.ull; break;
|
||
|
|
}
|
||
|
|
v->type = cv_uint;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cast_to_slong(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: v->val.sl = v->val.si; break;
|
||
|
|
case cv_uint: v->val.sl = v->val.ui; break;
|
||
|
|
case cv_slong: break;
|
||
|
|
case cv_ulong: break;
|
||
|
|
case cv_sll: v->val.sl = v->val.sll; break;
|
||
|
|
case cv_ull: v->val.sl = v->val.ull; break;
|
||
|
|
}
|
||
|
|
v->type = cv_slong;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cast_to_ulong(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: v->val.ul = v->val.si; break;
|
||
|
|
case cv_uint: v->val.ul = v->val.ui; break;
|
||
|
|
case cv_slong: break;
|
||
|
|
case cv_ulong: break;
|
||
|
|
case cv_sll: v->val.ul = v->val.sll; break;
|
||
|
|
case cv_ull: v->val.ul = v->val.ull; break;
|
||
|
|
}
|
||
|
|
v->type = cv_ulong;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cast_to_sll(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: v->val.sll = v->val.si; break;
|
||
|
|
case cv_uint: v->val.sll = v->val.ui; break;
|
||
|
|
case cv_slong: v->val.sll = v->val.sl; break;
|
||
|
|
case cv_ulong: v->val.sll = v->val.ul; break;
|
||
|
|
case cv_sll: break;
|
||
|
|
case cv_ull: break;
|
||
|
|
}
|
||
|
|
v->type = cv_sll;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cast_to_ull(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: v->val.ull = v->val.si; break;
|
||
|
|
case cv_uint: v->val.ull = v->val.ui; break;
|
||
|
|
case cv_slong: v->val.ull = v->val.sl; break;
|
||
|
|
case cv_ulong: v->val.ull = v->val.ul; break;
|
||
|
|
case cv_sll: break;
|
||
|
|
case cv_ull: break;
|
||
|
|
}
|
||
|
|
v->type = cv_ull;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static void promote_equal_size(cval_t *v1, cval_t *v2)
|
||
|
|
{
|
||
|
|
#define cv_sizeof(v) ((int)(v->type & SIZE_MASK))
|
||
|
|
int s1 = cv_sizeof(v1);
|
||
|
|
int s2 = cv_sizeof(v2);
|
||
|
|
#undef cv_sizeof
|
||
|
|
|
||
|
|
if(s1 == s2)
|
||
|
|
return;
|
||
|
|
else if(s1 > s2)
|
||
|
|
{
|
||
|
|
switch(v1->type)
|
||
|
|
{
|
||
|
|
case cv_sint: cast_to_sint(v2); break;
|
||
|
|
case cv_uint: cast_to_uint(v2); break;
|
||
|
|
case cv_slong: cast_to_slong(v2); break;
|
||
|
|
case cv_ulong: cast_to_ulong(v2); break;
|
||
|
|
case cv_sll: cast_to_sll(v2); break;
|
||
|
|
case cv_ull: cast_to_ull(v2); break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
switch(v2->type)
|
||
|
|
{
|
||
|
|
case cv_sint: cast_to_sint(v1); break;
|
||
|
|
case cv_uint: cast_to_uint(v1); break;
|
||
|
|
case cv_slong: cast_to_slong(v1); break;
|
||
|
|
case cv_ulong: cast_to_ulong(v1); break;
|
||
|
|
case cv_sll: cast_to_sll(v1); break;
|
||
|
|
case cv_ull: cast_to_ull(v1); break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static int boolean(cval_t *v)
|
||
|
|
{
|
||
|
|
switch(v->type)
|
||
|
|
{
|
||
|
|
case cv_sint: return v->val.si != (int)0;
|
||
|
|
case cv_uint: return v->val.ui != (unsigned int)0;
|
||
|
|
case cv_slong: return v->val.sl != (long)0;
|
||
|
|
case cv_ulong: return v->val.ul != (unsigned long)0;
|
||
|
|
case cv_sll: return v->val.sll != (wrc_sll_t)0;
|
||
|
|
case cv_ull: return v->val.ull != (wrc_ull_t)0;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static marg_t *new_marg(char *str, def_arg_t type)
|
||
|
|
{
|
||
|
|
marg_t *ma = (marg_t *)xmalloc(sizeof(marg_t));
|
||
|
|
ma->arg = str;
|
||
|
|
ma->type = type;
|
||
|
|
return ma;
|
||
|
|
}
|
||
|
|
|
||
|
|
static marg_t *add_new_marg(char *str, def_arg_t type)
|
||
|
|
{
|
||
|
|
marg_t *ma = new_marg(str, type);
|
||
|
|
nmacro_args++;
|
||
|
|
macro_args = (marg_t **)xrealloc(macro_args, nmacro_args * sizeof(macro_args[0]));
|
||
|
|
macro_args[nmacro_args-1] = ma;
|
||
|
|
return ma;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int marg_index(char *id)
|
||
|
|
{
|
||
|
|
int t;
|
||
|
|
for(t = 0; t < nmacro_args; t++)
|
||
|
|
{
|
||
|
|
if(!strcmp(id, macro_args[t]->arg))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return t < nmacro_args ? t : -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static mtext_t *new_mtext(char *str, int idx, def_exp_t type)
|
||
|
|
{
|
||
|
|
mtext_t *mt = (mtext_t *)xmalloc(sizeof(mtext_t));
|
||
|
|
if(str == NULL)
|
||
|
|
mt->subst.argidx = idx;
|
||
|
|
else
|
||
|
|
mt->subst.text = str;
|
||
|
|
mt->type = type;
|
||
|
|
return mt;
|
||
|
|
}
|
||
|
|
|
||
|
|
static mtext_t *combine_mtext(mtext_t *tail, mtext_t *mtp)
|
||
|
|
{
|
||
|
|
if(!tail)
|
||
|
|
return mtp;
|
||
|
|
|
||
|
|
if(!mtp)
|
||
|
|
return tail;
|
||
|
|
|
||
|
|
if(tail->type == exp_text && mtp->type == exp_text)
|
||
|
|
{
|
||
|
|
tail->subst.text = xrealloc(tail->subst.text, strlen(tail->subst.text)+strlen(mtp->subst.text)+1);
|
||
|
|
strcat(tail->subst.text, mtp->subst.text);
|
||
|
|
free(mtp->subst.text);
|
||
|
|
free(mtp);
|
||
|
|
return tail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(tail->type == exp_concat && mtp->type == exp_concat)
|
||
|
|
{
|
||
|
|
free(mtp);
|
||
|
|
return tail;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(tail->type == exp_concat && mtp->type == exp_text)
|
||
|
|
{
|
||
|
|
int len = strlen(mtp->subst.text);
|
||
|
|
while(len)
|
||
|
|
{
|
||
|
|
/* FIXME: should delete space from head of string */
|
||
|
|
if(isspace(mtp->subst.text[len-1]))
|
||
|
|
mtp->subst.text[--len] = '\0';
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!len)
|
||
|
|
{
|
||
|
|
free(mtp->subst.text);
|
||
|
|
free(mtp);
|
||
|
|
return tail;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(tail->type == exp_text && mtp->type == exp_concat)
|
||
|
|
{
|
||
|
|
int len = strlen(tail->subst.text);
|
||
|
|
while(len)
|
||
|
|
{
|
||
|
|
if(isspace(tail->subst.text[len-1]))
|
||
|
|
tail->subst.text[--len] = '\0';
|
||
|
|
else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!len)
|
||
|
|
{
|
||
|
|
mtp->prev = tail->prev;
|
||
|
|
mtp->next = tail->next;
|
||
|
|
if(tail->prev)
|
||
|
|
tail->prev->next = mtp;
|
||
|
|
free(tail->subst.text);
|
||
|
|
free(tail);
|
||
|
|
return mtp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
tail->next = mtp;
|
||
|
|
mtp->prev = tail;
|
||
|
|
|
||
|
|
return mtp;
|
||
|
|
}
|
||
|
|
|
||
|
|
static char *merge_text(char *s1, char *s2)
|
||
|
|
{
|
||
|
|
int l1 = strlen(s1);
|
||
|
|
int l2 = strlen(s2);
|
||
|
|
s1 = xrealloc(s1, l1+l2+1);
|
||
|
|
memcpy(s1+l1, s2, l2+1);
|
||
|
|
free(s2);
|
||
|
|
return s1;
|
||
|
|
}
|
||
|
|
|