translator.c File Reference

Source token substituter. More...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pcre.h>
#include "pair.h"
#include "lexer.h"
#include "serializer.h"
#include "translator.h"

Include dependency graph for translator.c:

Go to the source code of this file.

Defines
#define	EVAL(expr, err)   if (expr) { errno = err; perror(pcerr); iret = EXIT_FAILURE; goto cleanup; }
	Evaluates given expression and sets adherent internal failure state; goes to cleanup.
#define	ALLOC(str, vector)   EVAL((str = (char *) realloc(str, vector + sizeof('\0'))) == NULL, ENOMEM)
	Sends string to realloc (initialized with NONE ); calls adherent error in case thereof.
#define	STRCAT(stra, strb)   ALLOC(stra, strlen(stra) + strlen(strb)); strcat(stra, strb)
	Concatenates two strings; allocating and setting error states.
#define	STRSUB(stra, strb, offset)   ALLOC(stra, offset); sprintf(stra, "%.*s", offset, strb)
	Copies a given string, strb, starting at offset to a new string, stra.
#define	STRCPY(to, from)   ALLOC(to, strlen(from)) strcpy(to, from);
	Copy from to to, setting error states.
#define	NONE(a)   a = (char *) malloc(0)
	Prepares string for work, Vollendung.
Functions
int	translate (char *pcin, pair_t *ppain)
	Translates template's source according to {key, value} pairs.
void	translatetoken (char *pc, char **ppc)
	Translates source token according to {key, value} pairs, prompted of lexbuf.

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Detailed Description

Source token substituter.

Definition in file translator.c.

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Define Documentation

#define ALLOC (  str, vector   )     EVAL((str = (char *) realloc(str, vector + sizeof('\0'))) == NULL, ENOMEM)

Sends string to realloc (initialized with NONE ); calls adherent error in case thereof. Parameters: str  allocate vector  allocable quantum Definition at line 20 of file translator.c.

#define EVAL (  expr, err   )     if (expr) { errno = err; perror(pcerr); iret = EXIT_FAILURE; goto cleanup; }

Evaluates given expression and sets adherent internal failure state; goes to cleanup. Parameters: expr  evaluable err  errno Definition at line 16 of file translator.c.

#define NONE (  a   )     a = (char *) malloc(0)

Prepares string for work, Vollendung. Parameters: a  preparate Definition at line 36 of file translator.c.

#define STRCAT (  stra, strb   )     ALLOC(stra, strlen(stra) + strlen(strb)); strcat(stra, strb)

Concatenates two strings; allocating and setting error states. Parameters: stra  whither (concatenate) strb  whence (concatenand) Definition at line 24 of file translator.c.

#define STRCPY (  to, from   )     ALLOC(to, strlen(from)) strcpy(to, from);

Copy from to to, setting error states. Parameters: to  duplicate from  duplicand Definition at line 33 of file translator.c. Referenced by translatetoken().

#define STRSUB (  stra, strb, offset   )     ALLOC(stra, offset); sprintf(stra, "%.*s", offset, strb)

Copies a given string, strb, starting at offset to a new string, stra. Parameters: stra  duplicate strb  duplicand offset  duplicable quantum Definition at line 29 of file translator.c.

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Function Documentation

int translate (  char *  pcin, pair_t *  ppain )

Translates template's source according to {key, value} pairs. Parameters: pcin  untranslate [sic] source ppain  {key, value} pairs Returns: state eserialerr. Definition at line 42 of file translator.c. References lexbuf(), NONE, ppa, serialize(), and translatetoken(). Referenced by parsetag(). { int iret = EXIT_SUCCESS; const char *pcmask = "%%__[[:alnum:]]+?__%%"; char NONE(*pcbuf); ppa = ppain; lexbuf(pcin, pcmask, translatetoken, &pcbuf); /* Buck stops on FILE *. */ serialize(pcbuf, ppa); return iret; }

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void translatetoken (  char *  pc, char **  ppc )

Translates source token according to {key, value} pairs, prompted of lexbuf. Parameters: pc  lexate text ppc  lexand Definition at line 59 of file translator.c. References EVAL, pair_t::i, NONE, ppa, pair_t::ppan, STRCPY, STRSUB, TRBEGIN, TRCONST, TRCONT, TREND, TRSUB, and TRVECT. Referenced by translate(). { pcre *pre; int i, ire, iret, aisub[TRSUB * TRCONST]; /* iret: macro placeholder */ const char *pcmask = "^%%__([[:alnum:]]+?)__%%$"; const char *pcre; const char *pcerr = "translator.c translatetoken()"; char NONE(*pctoken); STRCPY(*ppc, ""); /* Guard against uninitialized garbage in case of unaccounted-for keys. */ pre = pcre_compile(pcmask, PCRE_CASELESS | PCRE_DOTALL, &pcre, &ire, NULL); EVAL(pcre_exec(pre, NULL, pc, strlen(pc), 0, 0, aisub, TRSUB * TRCONST) < 0, EINVAL); STRSUB(pctoken, pc + aisub[TRCONT * TRVECT + TRBEGIN], aisub[TRCONT * TRVECT + TREND] - aisub[TRCONT * TRVECT + TRBEGIN]); for (i = 0; i < ppa->i; i++) { if (strcmp((ppa->ppan + i)->pckey, pctoken) == 0) { STRCPY(*ppc, (ppa->ppan + i)->pcvalue); } } cleanup: free(pctoken); }

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