diff options
Diffstat (limited to 'term_ps.c')
| -rw-r--r-- | term_ps.c | 194 |
1 files changed, 139 insertions, 55 deletions
@@ -1,4 +1,4 @@ -/* $Id: term_ps.c,v 1.3 2010/06/08 15:06:01 kristaps Exp $ */ +/* $Id: term_ps.c,v 1.4 2010/06/09 08:07:13 kristaps Exp $ */ /* * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se> * @@ -18,9 +18,13 @@ #include "config.h" #endif +#include <sys/param.h> + #include <assert.h> +#include <stdarg.h> #include <stdio.h> #include <stdlib.h> +#include <string.h> #include "out.h" #include "main.h" @@ -34,12 +38,28 @@ #define PS_CHAR_BOTMARG 24 #define PS_CHAR_BOT (PS_CHAR_BOTMARG + 36) +#define PS_BUFSLOP 128 +#define PS_GROWBUF(p, sz) \ + do if ((p)->engine.ps.psmargcur + (sz) > \ + (p)->engine.ps.psmargsz) { \ + (p)->engine.ps.psmargsz += /* CONSTCOND */ \ + MAX(PS_BUFSLOP, (sz)); \ + (p)->engine.ps.psmarg = realloc \ + ((p)->engine.ps.psmarg, \ + (p)->engine.ps.psmargsz); \ + if (NULL == (p)->engine.ps.psmarg) { \ + perror(NULL); \ + exit(EXIT_FAILURE); \ + } \ + } while (/* CONSTCOND */ 0) + static void ps_letter(struct termp *, char); static void ps_begin(struct termp *); static void ps_end(struct termp *); -static void ps_pageopen(struct termp *); static void ps_advance(struct termp *, size_t); static void ps_endline(struct termp *); +static void ps_printf(struct termp *, const char *, ...); +static void ps_putchar(struct termp *, char); void * @@ -63,8 +83,68 @@ ps_alloc(void) void ps_free(void *arg) { + struct termp *p; + + p = (struct termp *)arg; + + if (p->engine.ps.psmarg) + free(p->engine.ps.psmarg); + + term_free(p); +} + + +static void +ps_printf(struct termp *p, const char *fmt, ...) +{ + va_list ap; + int pos; + + va_start(ap, fmt); + + /* + * If we're running in regular mode, then pipe directly into + * vprintf(). If we're processing margins, then push the data + * into our growable margin buffer. + */ + + if ( ! (PS_MARGINS & p->engine.ps.psstate)) { + vprintf(fmt, ap); + va_end(ap); + return; + } + + /* + * XXX: I assume that the in-margin print won't exceed + * PS_BUFSLOP (128 bytes), which is reasonable but still an + * assumption that will cause pukeage if it's not the case. + */ + + PS_GROWBUF(p, PS_BUFSLOP); + + pos = (int)p->engine.ps.psmargcur; + vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap); + p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg); +} + + +static void +ps_putchar(struct termp *p, char c) +{ + int pos; + + /* See ps_printf(). */ + + if ( ! (PS_MARGINS & p->engine.ps.psstate)) { + putchar(c); + return; + } + + PS_GROWBUF(p, 2); - term_free((struct termp *)arg); + pos = (int)p->engine.ps.psmargcur++; + p->engine.ps.psmarg[pos] = c; + p->engine.ps.psmarg[pos] = '\0'; } @@ -73,6 +153,15 @@ static void ps_end(struct termp *p) { + /* + * At the end of the file, do one last showpage. This is the + * same behaviour as groff(1) and works for multiple pages as + * well as just one. + */ + + assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); + printf("%s", p->engine.ps.psmarg); + printf("showpage\n"); printf("%s\n", "%%EOF"); } @@ -90,9 +179,47 @@ ps_begin(struct termp *p) printf("%s\n", "/Courier"); printf("%s\n", "10 selectfont"); - p->engine.ps.pspage = 1; p->engine.ps.psstate = 0; - ps_pageopen(p); + + if (p->engine.ps.psmarg) { + assert(p->engine.ps.psmargsz); + p->engine.ps.psmarg[0] = '\0'; + } + + p->engine.ps.psmargcur = 0; + + /* + * Now dump the margins into our margin buffer. If we don't do + * this, we'd break any current state to run the header and + * footer with each and evern new page. + */ + + p->engine.ps.pscol = PS_CHAR_LEFT; + p->engine.ps.psrow = PS_CHAR_TOPMARG; + + p->engine.ps.psstate |= PS_MARGINS; + + (*p->headf)(p, p->argf); + (*p->endline)(p); + + p->engine.ps.psstate &= ~PS_MARGINS; + assert(0 == p->engine.ps.psstate); + + p->engine.ps.pscol = PS_CHAR_LEFT; + p->engine.ps.psrow = PS_CHAR_BOTMARG; + p->engine.ps.psstate |= PS_MARGINS; + + (*p->footf)(p, p->argf); + (*p->endline)(p); + + p->engine.ps.psstate &= ~PS_MARGINS; + assert(0 == p->engine.ps.psstate); + + p->engine.ps.pscol = PS_CHAR_LEFT; + p->engine.ps.psrow = PS_CHAR_TOP; + + assert(p->engine.ps.psmarg); + assert('\0' != p->engine.ps.psmarg[0]); } @@ -105,10 +232,9 @@ ps_letter(struct termp *p, char c) * If we're not in a PostScript "word" context, then * open one now at the current cursor. */ - printf("%zu %zu moveto\n", + ps_printf(p, "%zu %zu moveto\n(", p->engine.ps.pscol, p->engine.ps.psrow); - putchar('('); p->engine.ps.psstate |= PS_INLINE; } @@ -125,64 +251,25 @@ ps_letter(struct termp *p, char c) case (')'): /* FALLTHROUGH */ case ('\\'): - putchar('\\'); + ps_putchar(p, '\\'); break; default: break; } /* Write the character and adjust where we are on the page. */ - putchar(c); + ps_putchar(p, c); p->engine.ps.pscol += PS_CHAR_WIDTH; } -/* - * Open a page. This is only used for -Tps at the moment. It opens a - * page context, printing the header and the footer. THE OUTPUT BUFFER - * MUST BE EMPTY. If it is not, output will ghost on the next line and - * we'll be all gross and out of state. - */ -static void -ps_pageopen(struct termp *p) -{ - - assert(TERMTYPE_PS == p->type); - assert(0 == p->engine.ps.psstate); - - p->engine.ps.pscol = PS_CHAR_LEFT; - p->engine.ps.psrow = PS_CHAR_TOPMARG; - p->engine.ps.psstate |= PS_MARGINS; - - (*p->headf)(p, p->argf); - (*p->endline)(p); - - p->engine.ps.psstate &= ~PS_MARGINS; - assert(0 == p->engine.ps.psstate); - - p->engine.ps.pscol = PS_CHAR_LEFT; - p->engine.ps.psrow = PS_CHAR_BOTMARG; - p->engine.ps.psstate |= PS_MARGINS; - - (*p->footf)(p, p->argf); - (*p->endline)(p); - - p->engine.ps.psstate &= ~PS_MARGINS; - assert(0 == p->engine.ps.psstate); - - p->engine.ps.pscol = PS_CHAR_LEFT; - p->engine.ps.psrow = PS_CHAR_TOP; - -} - - static void ps_advance(struct termp *p, size_t len) { if (PS_INLINE & p->engine.ps.psstate) { /* Dump out any existing line scope. */ - printf(") show\n"); + ps_printf(p, ") show\n"); p->engine.ps.psstate &= ~PS_INLINE; } @@ -195,7 +282,7 @@ ps_endline(struct termp *p) { if (PS_INLINE & p->engine.ps.psstate) { - printf(") show\n"); + ps_printf(p, ") show\n"); p->engine.ps.psstate &= ~PS_INLINE; } @@ -208,11 +295,8 @@ ps_endline(struct termp *p) return; } - /* - * XXX: can't run pageopen() until we're certain a flushln() has - * occured, else the buf will reopen in an awkward state on the - * next line. - */ + assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]); + printf("%s", p->engine.ps.psmarg); printf("showpage\n"); p->engine.ps.psrow = PS_CHAR_TOP; } |