math.c File Reference

Generic LaTeX renderer. More...

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <wordexp.h>
#include "../serializer.h"
#include "../migrator.h"
#include "../out.h"
#include "math.h"

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Defines
#define	EVAL(expr, err, errnum)   if (expr) { errno = err; perror(pcerr); iret = errnum; goto cleanup; }
	Evaluates expression, sets error fields and starts cleanup.
#define	ALLOC(str, vector)   EVAL((str = (char *) realloc(str, vector * sizeof(char) + sizeof('\0'))) == NULL, ENOMEM, ERRGENERAL)
	Allocates a string with given vector, calling EVAL to error-process as necessary.
#define	NONE(a)   a = (char *) malloc(0)
	Allocates a string suitably for realloc.
Functions
int	math (char *pcin, char *pcdigest, pair_t *ppa)
	Default LaTeX renderer; may be extended to other classes by including their templates in the inc folder.

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Detailed Description

Generic LaTeX renderer.

Definition in file math.c.

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Define Documentation

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

Allocates a string with given vector, calling EVAL to error-process as necessary. Parameters: str  String to be allocated; should be initialized by NONE . vector  size to be allocated See also: EVAL, NONE Definition at line 25 of file math.c.

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

Evaluates expression, sets error fields and starts cleanup. Parameters: expr  evaluable err  errno errnum  interal error eserialerr Definition at line 19 of file math.c.

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

Allocates a string suitably for realloc. Parameters: a  to-be-allocated string Definition at line 29 of file math.c.

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Function Documentation

int math (  char *  pcin, char *  pcdigest, pair_t *  ppa )

Default LaTeX renderer; may be extended to other classes by including their templates in the inc folder. Parameters: pcin  the translated source pcdigest  hash of the source, whether MD5 ppa  set of content tokens, whose first is class -> content Returns: status according to eserialerr . Definition at line 37 of file math.c. References ALLOC, cache(), ERRMATH, ERRMATHWRITE, ERROK, ERRPROCESS, EVAL, pair_t::i, migrate(), NONE, out(), pcdigest(), pairnode_t::pckey, pairnode_t::pcvalue, ppa, pair_t::ppan, and PREFIX. Referenced by serialize(). { int i, j, iret = ERROK; const char *pctagbase = "<span class=\"%s\"><img alt=\"%s\" src=\"%s\" /></span>"; const char *pccommandbase = "latex --interaction=batchmode --jobname=%s %s >&2"; const char *pcerr = "math.c math()"; const char *pcaltkey = "alt"; const char *pcoutbase = "%s.tex"; char NONE(*pccommand), NONE(*pcjob), NONE(*pcout), *pcalt; wordexp_t w; FILE *pfproc, *pfout; ALLOC(pcjob, strlen(PREFIX) + strlen(pcdigest)); strcpy(pcjob, PREFIX); strcat(pcjob, pcdigest); if (!cache(pcjob, &w)) { ALLOC(pcout, strlen(pcoutbase) + strlen(pcjob)); sprintf(pcout, pcoutbase, pcjob); EVAL((pfout = fopen(pcout, "w")) == NULL, EIO, ERRMATHWRITE); EVAL(out(pcin, pfout) != EXIT_SUCCESS, EIO, ERRMATHWRITE); EVAL(fclose(pfout) == EOF, errno, ERRMATHWRITE); ALLOC(pccommand, strlen(pccommandbase) + strlen(pcjob) + strlen(pcout)); sprintf(pccommand, pccommandbase, pcjob, pcout); EVAL((pfproc = popen(pccommand, "r")) == NULL, EIO, ERRPROCESS); EVAL(pclose(pfproc) == -1, EINVAL, ERRMATH); EVAL((i = migrate(pcjob, &w)) != ERROK, EINVAL, i); } for (i = 0; i < w.we_wordc; i++) { /* alternate text points to unadorned content */ pcalt = ppa->ppan->pcvalue; /* test for extant alt->content pair */ for (j = 0; j < ppa->i; j++) { if (strcmp(pcaltkey, (ppa->ppan + i)->pckey) == 0) { pcalt = (ppa->ppan + i)->pcvalue; break; } } /* terminal interface */ printf(pctagbase, ppa->ppan->pckey, pcalt, *(w.we_wordv + i)); } wordfree(&w); cleanup: free(pcjob); free(pccommand); free(pcout); return iret; }

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