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-rw-r--r--stream/stm_open.c442
-rw-r--r--stream/stm_read.c522
-rw-r--r--stream/stm_write.c556
3 files changed, 760 insertions, 760 deletions
diff --git a/stream/stm_open.c b/stream/stm_open.c
index baec93fa..6481288a 100644
--- a/stream/stm_open.c
+++ b/stream/stm_open.c
@@ -1,223 +1,223 @@
-/*
- * Creation and destruction.
- */
-
+/*
+ * Creation and destruction.
+ */
+
#include "fitz-base.h"
#include "fitz-stream.h"
-
-static fz_stream *
-newstm(int kind, int mode)
-{
- fz_stream *stm;
-
- stm = fz_malloc(sizeof(fz_stream));
- if (!stm)
- return nil;
-
- stm->refs = 1;
- stm->kind = kind;
- stm->mode = mode;
- stm->dead = 0;
- stm->error = nil;
- stm->buffer = nil;
-
- stm->chain = nil;
- stm->filter = nil;
- stm->file = -1;
-
- return stm;
-}
-
-fz_error *
-fz_ioerror(fz_stream *stm)
-{
- fz_error *error;
- if (stm->error)
- {
- error = stm->error;
- stm->error = nil;
- return error;
- }
- return fz_throw("ioerror: no error");
-}
-
-fz_stream *
-fz_keepstream(fz_stream *stm)
-{
- stm->refs ++;
- return stm;
-}
-
-void
-fz_dropstream(fz_stream *stm)
-{
- stm->refs --;
- if (stm->refs == 0)
- {
- if (stm->error)
- {
- fz_warn("unhandled %s", stm->error->msg);
- fz_droperror(stm->error);
- }
-
- if (stm->mode == FZ_SWRITE)
- {
- stm->buffer->eof = 1;
- fz_flush(stm);
- }
-
- switch (stm->kind)
- {
- case FZ_SFILE:
- close(stm->file);
- break;
- case FZ_SFILTER:
- fz_dropfilter(stm->filter);
- fz_dropstream(stm->chain);
- break;
- case FZ_SBUFFER:
- break;
- }
-
- fz_dropbuffer(stm->buffer);
- fz_free(stm);
- }
-}
-
-static fz_error *
-openfile(fz_stream **stmp, char *path, int mode, int realmode)
-{
- fz_error *error;
- fz_stream *stm;
-
- stm = newstm(FZ_SFILE, mode);
- if (!stm)
- return fz_outofmem;
-
- error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
- if (error)
- {
- fz_free(stm);
- return error;
- }
-
- stm->file = open(path, realmode, 0666);
- if (stm->file < 0)
- {
- fz_dropbuffer(stm->buffer);
- fz_free(stm);
- return fz_throw("ioerror: open '%s' failed: %s", path, strerror(errno));
- }
-
- *stmp = stm;
- return nil;
-}
-
-static fz_error *
-openfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src, int mode)
-{
- fz_error *error;
- fz_stream *stm;
-
- stm = newstm(FZ_SFILTER, mode);
- if (!stm)
- return fz_outofmem;
-
- error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
- if (error)
- {
- fz_free(stm);
- return error;
- }
-
- stm->chain = fz_keepstream(src);
- stm->filter = fz_keepfilter(flt);
-
- *stmp = stm;
- return nil;
-}
-
-static fz_error *
-openbuffer(fz_stream **stmp, fz_buffer *buf, int mode)
-{
- fz_stream *stm;
-
- stm = newstm(FZ_SBUFFER, mode);
- if (!stm)
- return fz_outofmem;
-
- stm->buffer = fz_keepbuffer(buf);
-
- if (mode == FZ_SREAD)
- stm->buffer->eof = 1;
-
- *stmp = stm;
- return nil;
-}
-
-fz_error * fz_openrfile(fz_stream **stmp, char *path)
-{
- return openfile(stmp, path, FZ_SREAD, O_BINARY | O_RDONLY);
-}
-
-fz_error * fz_openwfile(fz_stream **stmp, char *path)
-{
- return openfile(stmp, path, FZ_SWRITE,
- O_BINARY | O_WRONLY | O_CREAT | O_TRUNC);
-}
-
-fz_error * fz_openafile(fz_stream **stmp, char *path)
-{
- fz_error *error;
- int t;
-
- error = openfile(stmp, path, FZ_SWRITE, O_BINARY | O_WRONLY);
- if (error)
- return error;
-
- t = lseek((*stmp)->file, 0, 2);
- if (t < 0)
- {
- (*stmp)->dead = 1;
- return fz_throw("ioerror: lseek: %s", strerror(errno));
- }
-
- return nil;
-}
-
-fz_error * fz_openrfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src)
-{
- return openfilter(stmp, flt, src, FZ_SREAD);
-}
-
-fz_error * fz_openwfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src)
-{
- return openfilter(stmp, flt, src, FZ_SWRITE);
-}
-
-fz_error * fz_openrbuffer(fz_stream **stmp, fz_buffer *buf)
-{
- return openbuffer(stmp, buf, FZ_SREAD);
-}
-
-fz_error * fz_openwbuffer(fz_stream **stmp, fz_buffer *buf)
-{
- return openbuffer(stmp, buf, FZ_SWRITE);
-}
-
-fz_error * fz_openrmemory(fz_stream **stmp, char *mem, int len)
-{
- fz_error *error;
- fz_buffer *buf;
-
- error = fz_newbufferwithmemory(&buf, mem, len);
- if (error)
- return error;
-
- error = fz_openrbuffer(stmp, buf);
-
- fz_dropbuffer(buf);
-
- return error;
-}
-
+
+static fz_stream *
+newstm(int kind, int mode)
+{
+ fz_stream *stm;
+
+ stm = fz_malloc(sizeof(fz_stream));
+ if (!stm)
+ return nil;
+
+ stm->refs = 1;
+ stm->kind = kind;
+ stm->mode = mode;
+ stm->dead = 0;
+ stm->error = nil;
+ stm->buffer = nil;
+
+ stm->chain = nil;
+ stm->filter = nil;
+ stm->file = -1;
+
+ return stm;
+}
+
+fz_error *
+fz_ioerror(fz_stream *stm)
+{
+ fz_error *error;
+ if (stm->error)
+ {
+ error = stm->error;
+ stm->error = nil;
+ return error;
+ }
+ return fz_throw("ioerror: no error");
+}
+
+fz_stream *
+fz_keepstream(fz_stream *stm)
+{
+ stm->refs ++;
+ return stm;
+}
+
+void
+fz_dropstream(fz_stream *stm)
+{
+ stm->refs --;
+ if (stm->refs == 0)
+ {
+ if (stm->error)
+ {
+ fz_warn("unhandled %s", stm->error->msg);
+ fz_droperror(stm->error);
+ }
+
+ if (stm->mode == FZ_SWRITE)
+ {
+ stm->buffer->eof = 1;
+ fz_flush(stm);
+ }
+
+ switch (stm->kind)
+ {
+ case FZ_SFILE:
+ close(stm->file);
+ break;
+ case FZ_SFILTER:
+ fz_dropfilter(stm->filter);
+ fz_dropstream(stm->chain);
+ break;
+ case FZ_SBUFFER:
+ break;
+ }
+
+ fz_dropbuffer(stm->buffer);
+ fz_free(stm);
+ }
+}
+
+static fz_error *
+openfile(fz_stream **stmp, char *path, int mode, int realmode)
+{
+ fz_error *error;
+ fz_stream *stm;
+
+ stm = newstm(FZ_SFILE, mode);
+ if (!stm)
+ return fz_outofmem;
+
+ error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
+ if (error)
+ {
+ fz_free(stm);
+ return error;
+ }
+
+ stm->file = open(path, realmode, 0666);
+ if (stm->file < 0)
+ {
+ fz_dropbuffer(stm->buffer);
+ fz_free(stm);
+ return fz_throw("ioerror: open '%s' failed: %s", path, strerror(errno));
+ }
+
+ *stmp = stm;
+ return nil;
+}
+
+static fz_error *
+openfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src, int mode)
+{
+ fz_error *error;
+ fz_stream *stm;
+
+ stm = newstm(FZ_SFILTER, mode);
+ if (!stm)
+ return fz_outofmem;
+
+ error = fz_newbuffer(&stm->buffer, FZ_BUFSIZE);
+ if (error)
+ {
+ fz_free(stm);
+ return error;
+ }
+
+ stm->chain = fz_keepstream(src);
+ stm->filter = fz_keepfilter(flt);
+
+ *stmp = stm;
+ return nil;
+}
+
+static fz_error *
+openbuffer(fz_stream **stmp, fz_buffer *buf, int mode)
+{
+ fz_stream *stm;
+
+ stm = newstm(FZ_SBUFFER, mode);
+ if (!stm)
+ return fz_outofmem;
+
+ stm->buffer = fz_keepbuffer(buf);
+
+ if (mode == FZ_SREAD)
+ stm->buffer->eof = 1;
+
+ *stmp = stm;
+ return nil;
+}
+
+fz_error * fz_openrfile(fz_stream **stmp, char *path)
+{
+ return openfile(stmp, path, FZ_SREAD, O_BINARY | O_RDONLY);
+}
+
+fz_error * fz_openwfile(fz_stream **stmp, char *path)
+{
+ return openfile(stmp, path, FZ_SWRITE,
+ O_BINARY | O_WRONLY | O_CREAT | O_TRUNC);
+}
+
+fz_error * fz_openafile(fz_stream **stmp, char *path)
+{
+ fz_error *error;
+ int t;
+
+ error = openfile(stmp, path, FZ_SWRITE, O_BINARY | O_WRONLY);
+ if (error)
+ return error;
+
+ t = lseek((*stmp)->file, 0, 2);
+ if (t < 0)
+ {
+ (*stmp)->dead = 1;
+ return fz_throw("ioerror: lseek: %s", strerror(errno));
+ }
+
+ return nil;
+}
+
+fz_error * fz_openrfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src)
+{
+ return openfilter(stmp, flt, src, FZ_SREAD);
+}
+
+fz_error * fz_openwfilter(fz_stream **stmp, fz_filter *flt, fz_stream *src)
+{
+ return openfilter(stmp, flt, src, FZ_SWRITE);
+}
+
+fz_error * fz_openrbuffer(fz_stream **stmp, fz_buffer *buf)
+{
+ return openbuffer(stmp, buf, FZ_SREAD);
+}
+
+fz_error * fz_openwbuffer(fz_stream **stmp, fz_buffer *buf)
+{
+ return openbuffer(stmp, buf, FZ_SWRITE);
+}
+
+fz_error * fz_openrmemory(fz_stream **stmp, char *mem, int len)
+{
+ fz_error *error;
+ fz_buffer *buf;
+
+ error = fz_newbufferwithmemory(&buf, mem, len);
+ if (error)
+ return error;
+
+ error = fz_openrbuffer(stmp, buf);
+
+ fz_dropbuffer(buf);
+
+ return error;
+}
+
diff --git a/stream/stm_read.c b/stream/stm_read.c
index 484414c5..12e6a288 100644
--- a/stream/stm_read.c
+++ b/stream/stm_read.c
@@ -1,263 +1,263 @@
-/*
- * Input streams.
- */
-
+/*
+ * Input streams.
+ */
+
#include "fitz-base.h"
#include "fitz-stream.h"
-
-int
-fz_makedata(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- fz_error *error;
- fz_error *reason;
- int produced;
- int n;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SREAD)
- return -1;
-
- if (buf->eof)
- return 0;
-
- error = fz_rewindbuffer(buf);
- if (error)
- goto cleanup;
-
- if (buf->ep - buf->wp == 0)
- {
- error = fz_growbuffer(buf);
- if (error)
- goto cleanup;
- }
-
- switch (stm->kind)
- {
-
- case FZ_SFILE:
- n = read(stm->file, buf->wp, buf->ep - buf->wp);
- if (n == -1)
- {
- stm->error = fz_throw("ioerror: read: %s", strerror(errno));
- stm->dead = 1;
- return -1;
- }
- if (n == 0)
- buf->eof = 1;
- buf->wp += n;
- return n;
-
- case FZ_SFILTER:
- produced = 0;
-
- while (1)
- {
- reason = fz_process(stm->filter, stm->chain->buffer, buf);
-
- if (stm->filter->produced)
- produced = 1;
-
- if (reason == fz_ioneedin)
- {
- if (fz_makedata(stm->chain) < 0)
- {
- stm->dead = 1;
- return -1;
- }
- }
-
- else if (reason == fz_ioneedout)
- {
- if (produced)
- return 0;
-
- if (buf->rp > buf->bp)
- {
- error = fz_rewindbuffer(buf);
- if (error)
- goto cleanup;
- }
- else
- {
- error = fz_growbuffer(buf);
- if (error)
- goto cleanup;
- }
- }
-
- else if (reason == fz_iodone)
- {
- return 0;
- }
-
- else
- {
- error = reason;
- goto cleanup;
- }
- }
-
- case FZ_SBUFFER:
- return 0;
- }
-
- return -1;
-
-cleanup:
- stm->error = error;
- stm->dead = 1;
- return -1;
-}
-
-int fz_rtell(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- int t;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SREAD)
- return -1;
-
- switch (stm->kind)
- {
- case FZ_SFILE:
- t = lseek(stm->file, 0, 1);
- if (t < 0)
- {
- stm->dead = 1;
- return -1;
- }
- return t - (buf->wp - buf->rp);
-
- case FZ_SFILTER:
- return stm->filter->count - (buf->wp - buf->rp);
-
- case FZ_SBUFFER:
- return buf->rp - buf->bp;
- }
-
- return -1;
-}
-
-int fz_rseek(fz_stream *stm, int offset, int whence)
-{
- fz_buffer *buf = stm->buffer;
- int t, c;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SREAD)
- return -1;
-
- if (whence == 1)
- {
- int cur = fz_rtell(stm);
- if (cur < 0)
- return -1;
- offset = cur + offset;
- whence = 0;
- }
-
- buf->eof = 0;
-
- switch (stm->kind)
- {
- case FZ_SFILE:
- t = lseek(stm->file, offset, whence);
- if (t < 0)
- {
- stm->error = fz_throw("ioerror: lseek: %s", strerror(errno));
- stm->dead = 1;
- return -1;
- }
-
- buf->rp = buf->bp;
- buf->wp = buf->bp;
-
- return t;
-
- case FZ_SFILTER:
- if (whence == 0)
- {
- if (offset < fz_tell(stm))
- {
- stm->error = fz_throw("ioerror: cannot seek back in filter");
- stm->dead = 1;
- return -1;
- }
- while (fz_tell(stm) < offset)
- {
- c = fz_readbyte(stm);
- if (c == EOF)
- break;
- }
- return fz_tell(stm);
- }
- else
- {
- stm->dead = 1;
- return -1;
- }
-
- case FZ_SBUFFER:
- if (whence == 0)
- buf->rp = CLAMP(buf->bp + offset, buf->bp, buf->ep);
- else
- buf->rp = CLAMP(buf->ep + offset, buf->bp, buf->ep);
- return buf->rp - buf->bp;
- }
-
- return -1;
-}
-
-int fz_readbytex(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- if (buf->rp == buf->wp)
- {
- if (buf->eof) return EOF;
- if (fz_makedata(stm) < 0) return EOF;
- }
- if (buf->rp < buf->wp)
- return *buf->rp++;
- return EOF;
-}
-
-int fz_peekbytex(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- if (buf->rp == buf->wp)
- {
- if (buf->eof) return EOF;
- if (fz_makedata(stm) < 0) return EOF;
- }
- if (buf->rp < buf->wp)
- return *buf->rp;
- return EOF;
-}
-
-int fz_read(fz_stream *stm, unsigned char *mem, int n)
-{
- fz_buffer *buf = stm->buffer;
- int i = 0;
-
- while (i < n)
- {
- while (buf->rp < buf->wp && i < n)
- mem[i++] = *buf->rp++;
- if (buf->rp == buf->wp)
- {
- if (buf->eof) return i;
- if (fz_makedata(stm) < 0) return -1;
- }
- }
-
- return i;
-}
-
+
+int
+fz_makedata(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ fz_error *error;
+ fz_error *reason;
+ int produced;
+ int n;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SREAD)
+ return -1;
+
+ if (buf->eof)
+ return 0;
+
+ error = fz_rewindbuffer(buf);
+ if (error)
+ goto cleanup;
+
+ if (buf->ep - buf->wp == 0)
+ {
+ error = fz_growbuffer(buf);
+ if (error)
+ goto cleanup;
+ }
+
+ switch (stm->kind)
+ {
+
+ case FZ_SFILE:
+ n = read(stm->file, buf->wp, buf->ep - buf->wp);
+ if (n == -1)
+ {
+ stm->error = fz_throw("ioerror: read: %s", strerror(errno));
+ stm->dead = 1;
+ return -1;
+ }
+ if (n == 0)
+ buf->eof = 1;
+ buf->wp += n;
+ return n;
+
+ case FZ_SFILTER:
+ produced = 0;
+
+ while (1)
+ {
+ reason = fz_process(stm->filter, stm->chain->buffer, buf);
+
+ if (stm->filter->produced)
+ produced = 1;
+
+ if (reason == fz_ioneedin)
+ {
+ if (fz_makedata(stm->chain) < 0)
+ {
+ stm->dead = 1;
+ return -1;
+ }
+ }
+
+ else if (reason == fz_ioneedout)
+ {
+ if (produced)
+ return 0;
+
+ if (buf->rp > buf->bp)
+ {
+ error = fz_rewindbuffer(buf);
+ if (error)
+ goto cleanup;
+ }
+ else
+ {
+ error = fz_growbuffer(buf);
+ if (error)
+ goto cleanup;
+ }
+ }
+
+ else if (reason == fz_iodone)
+ {
+ return 0;
+ }
+
+ else
+ {
+ error = reason;
+ goto cleanup;
+ }
+ }
+
+ case FZ_SBUFFER:
+ return 0;
+ }
+
+ return -1;
+
+cleanup:
+ stm->error = error;
+ stm->dead = 1;
+ return -1;
+}
+
+int fz_rtell(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ int t;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SREAD)
+ return -1;
+
+ switch (stm->kind)
+ {
+ case FZ_SFILE:
+ t = lseek(stm->file, 0, 1);
+ if (t < 0)
+ {
+ stm->dead = 1;
+ return -1;
+ }
+ return t - (buf->wp - buf->rp);
+
+ case FZ_SFILTER:
+ return stm->filter->count - (buf->wp - buf->rp);
+
+ case FZ_SBUFFER:
+ return buf->rp - buf->bp;
+ }
+
+ return -1;
+}
+
+int fz_rseek(fz_stream *stm, int offset, int whence)
+{
+ fz_buffer *buf = stm->buffer;
+ int t, c;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SREAD)
+ return -1;
+
+ if (whence == 1)
+ {
+ int cur = fz_rtell(stm);
+ if (cur < 0)
+ return -1;
+ offset = cur + offset;
+ whence = 0;
+ }
+
+ buf->eof = 0;
+
+ switch (stm->kind)
+ {
+ case FZ_SFILE:
+ t = lseek(stm->file, offset, whence);
+ if (t < 0)
+ {
+ stm->error = fz_throw("ioerror: lseek: %s", strerror(errno));
+ stm->dead = 1;
+ return -1;
+ }
+
+ buf->rp = buf->bp;
+ buf->wp = buf->bp;
+
+ return t;
+
+ case FZ_SFILTER:
+ if (whence == 0)
+ {
+ if (offset < fz_tell(stm))
+ {
+ stm->error = fz_throw("ioerror: cannot seek back in filter");
+ stm->dead = 1;
+ return -1;
+ }
+ while (fz_tell(stm) < offset)
+ {
+ c = fz_readbyte(stm);
+ if (c == EOF)
+ break;
+ }
+ return fz_tell(stm);
+ }
+ else
+ {
+ stm->dead = 1;
+ return -1;
+ }
+
+ case FZ_SBUFFER:
+ if (whence == 0)
+ buf->rp = CLAMP(buf->bp + offset, buf->bp, buf->ep);
+ else
+ buf->rp = CLAMP(buf->ep + offset, buf->bp, buf->ep);
+ return buf->rp - buf->bp;
+ }
+
+ return -1;
+}
+
+int fz_readbytex(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ if (buf->rp == buf->wp)
+ {
+ if (buf->eof) return EOF;
+ if (fz_makedata(stm) < 0) return EOF;
+ }
+ if (buf->rp < buf->wp)
+ return *buf->rp++;
+ return EOF;
+}
+
+int fz_peekbytex(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ if (buf->rp == buf->wp)
+ {
+ if (buf->eof) return EOF;
+ if (fz_makedata(stm) < 0) return EOF;
+ }
+ if (buf->rp < buf->wp)
+ return *buf->rp;
+ return EOF;
+}
+
+int fz_read(fz_stream *stm, unsigned char *mem, int n)
+{
+ fz_buffer *buf = stm->buffer;
+ int i = 0;
+
+ while (i < n)
+ {
+ while (buf->rp < buf->wp && i < n)
+ mem[i++] = *buf->rp++;
+ if (buf->rp == buf->wp)
+ {
+ if (buf->eof) return i;
+ if (fz_makedata(stm) < 0) return -1;
+ }
+ }
+
+ return i;
+}
+
diff --git a/stream/stm_write.c b/stream/stm_write.c
index e0dad571..cc6c0ef1 100644
--- a/stream/stm_write.c
+++ b/stream/stm_write.c
@@ -1,280 +1,280 @@
-/*
- * Output streams.
- */
-
+/*
+ * Output streams.
+ */
+
#include "fitz-base.h"
#include "fitz-stream.h"
-
-int fz_wtell(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- int t;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SWRITE)
- return -1;
-
- switch (stm->kind)
- {
- case FZ_SFILE:
- t = lseek(stm->file, 0, 1);
- if (t < 0)
- {
- stm->error = fz_throw("ioerror: lseek: %s", strerror(errno));
- stm->dead = 1;
- return -1;
- }
- return t - (buf->wp - buf->rp);
-
- case FZ_SFILTER:
- return stm->filter->count - (buf->wp - buf->rp);
-
- case FZ_SBUFFER:
- return buf->wp - buf->bp;
- }
-
- return -1;
-}
-
-int fz_wseek(fz_stream *stm, int offset, int whence)
-{
- fz_buffer *buf = stm->buffer;
- int t;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SWRITE)
- return -1;
-
- if (stm->kind != FZ_SFILE)
- return -1;
-
- t = lseek(stm->file, offset, whence);
- if (t < 0)
- {
- stm->error = fz_throw("ioerror: lseek: %s", strerror(errno));
- stm->dead = 1;
- return -1;
- }
-
- buf->rp = buf->bp;
- buf->wp = buf->bp;
- buf->eof = 0;
-
- return t;
-}
-
-static int flushfilter(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- fz_error *error;
- fz_error *reason;
- int t;
-
-loop:
-
- reason = fz_process(stm->filter, stm->buffer, stm->chain->buffer);
-
- if (reason == fz_ioneedin)
- {
- if (buf->rp > buf->ep)
- fz_rewindbuffer(buf);
- else
- {
- error = fz_growbuffer(buf);
- if (error)
- goto cleanup;
- }
- }
-
- else if (reason == fz_ioneedout)
- {
- t = fz_flush(stm->chain);
- if (t < 0)
- return -1;
- }
-
- else if (reason == fz_iodone)
- {
- stm->dead = 2; /* special flag that we are dead because of eod */
- }
-
- else
- {
- error = reason;
- goto cleanup;
- }
-
- /* if we are at eof, repeat until other filter sets otherside to eof */
- if (buf->eof && !stm->chain->buffer->eof)
- goto loop;
-
- return 0;
-
-cleanup:
- stm->error = error;
- stm->dead = 1;
- return -1;
-}
-
-/*
- * Empty the buffer into the sink.
- * Promise to make more space available.
- * Called by fz_write and fz_dropstream.
- * If buffer is eof, then all data must be flushed.
- */
-int fz_flush(fz_stream *stm)
-{
- fz_buffer *buf = stm->buffer;
- fz_error *error;
- int t;
-
- if (stm->dead == 2)
- return 0;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SWRITE)
- return -1;
-
- switch (stm->kind)
- {
- case FZ_SFILE:
- while (buf->rp < buf->wp)
- {
- t = write(stm->file, buf->rp, buf->wp - buf->rp);
- if (t < 0)
- {
- stm->error = fz_throw("ioerror: write: %s", strerror(errno));
- stm->dead = 1;
- return -1;
- }
-
- buf->rp += t;
- }
-
- if (buf->rp > buf->bp)
- fz_rewindbuffer(buf);
-
- return 0;
-
- case FZ_SFILTER:
- return flushfilter(stm);
-
- case FZ_SBUFFER:
- if (!buf->eof && buf->wp == buf->ep)
- {
- error = fz_growbuffer(buf);
- if (error)
- {
- stm->error = error;
- stm->dead = 1;
- return -1;
- }
- }
- return 0;
- }
-
- return -1;
-}
-
-/*
- * Write data to stream.
- * Buffer until internal buffer is full.
- * When full, call fz_flush to make more space available.
- */
-int fz_write(fz_stream *stm, unsigned char *mem, int n)
-{
- fz_buffer *buf = stm->buffer;
- int i = 0;
- int t;
-
- if (stm->dead == 2)
- return 0;
-
- if (stm->dead)
- return -1;
-
- if (stm->mode != FZ_SWRITE)
- return -1;
-
- while (i < n)
- {
- while (buf->wp < buf->ep && i < n)
- *buf->wp++ = mem[i++];
-
- if (buf->wp == buf->ep && i < n)
- {
- t = fz_flush(stm);
- if (t < 0)
- return -1;
- if (stm->dead)
- return i;
- }
- }
-
- return n;
-}
-
-int fz_printstr(fz_stream *stm, char *s)
-{
- return fz_write(stm, s, strlen(s));
-}
-
-int fz_printobj(fz_stream *file, fz_obj *obj, int tight)
-{
- char buf[1024];
- char *ptr;
- int n;
-
- n = fz_sprintobj(nil, 0, obj, tight);
- if (n < sizeof buf)
- {
- fz_sprintobj(buf, sizeof buf, obj, tight);
- return fz_write(file, buf, n);
- }
- else
- {
- ptr = fz_malloc(n);
- if (!ptr)
- return -1;
- fz_sprintobj(ptr, n, obj, tight);
- n = fz_write(file, ptr, n);
- fz_free(ptr);
- return n;
- }
-}
-
-int fz_print(fz_stream *stm, char *fmt, ...)
-{
- va_list ap;
- char buf[1024];
- char *p;
- int n;
-
- va_start(ap, fmt);
- n = vsnprintf(buf, sizeof buf, fmt, ap);
- va_end(ap);
-
- if (n < sizeof buf)
- return fz_write(stm, buf, n);
-
- p = fz_malloc(n);
- if (!p)
- return -1;
-
- va_start(ap, fmt);
- vsnprintf(p, n, fmt, ap);
- va_end(ap);
-
- n = fz_write(stm, p, n);
-
- fz_free(p);
-
- return n;
-}
-
+
+int fz_wtell(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ int t;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SWRITE)
+ return -1;
+
+ switch (stm->kind)
+ {
+ case FZ_SFILE:
+ t = lseek(stm->file, 0, 1);
+ if (t < 0)
+ {
+ stm->error = fz_throw("ioerror: lseek: %s", strerror(errno));
+ stm->dead = 1;
+ return -1;
+ }
+ return t - (buf->wp - buf->rp);
+
+ case FZ_SFILTER:
+ return stm->filter->count - (buf->wp - buf->rp);
+
+ case FZ_SBUFFER:
+ return buf->wp - buf->bp;
+ }
+
+ return -1;
+}
+
+int fz_wseek(fz_stream *stm, int offset, int whence)
+{
+ fz_buffer *buf = stm->buffer;
+ int t;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SWRITE)
+ return -1;
+
+ if (stm->kind != FZ_SFILE)
+ return -1;
+
+ t = lseek(stm->file, offset, whence);
+ if (t < 0)
+ {
+ stm->error = fz_throw("ioerror: lseek: %s", strerror(errno));
+ stm->dead = 1;
+ return -1;
+ }
+
+ buf->rp = buf->bp;
+ buf->wp = buf->bp;
+ buf->eof = 0;
+
+ return t;
+}
+
+static int flushfilter(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ fz_error *error;
+ fz_error *reason;
+ int t;
+
+loop:
+
+ reason = fz_process(stm->filter, stm->buffer, stm->chain->buffer);
+
+ if (reason == fz_ioneedin)
+ {
+ if (buf->rp > buf->ep)
+ fz_rewindbuffer(buf);
+ else
+ {
+ error = fz_growbuffer(buf);
+ if (error)
+ goto cleanup;
+ }
+ }
+
+ else if (reason == fz_ioneedout)
+ {
+ t = fz_flush(stm->chain);
+ if (t < 0)
+ return -1;
+ }
+
+ else if (reason == fz_iodone)
+ {
+ stm->dead = 2; /* special flag that we are dead because of eod */
+ }
+
+ else
+ {
+ error = reason;
+ goto cleanup;
+ }
+
+ /* if we are at eof, repeat until other filter sets otherside to eof */
+ if (buf->eof && !stm->chain->buffer->eof)
+ goto loop;
+
+ return 0;
+
+cleanup:
+ stm->error = error;
+ stm->dead = 1;
+ return -1;
+}
+
+/*
+ * Empty the buffer into the sink.
+ * Promise to make more space available.
+ * Called by fz_write and fz_dropstream.
+ * If buffer is eof, then all data must be flushed.
+ */
+int fz_flush(fz_stream *stm)
+{
+ fz_buffer *buf = stm->buffer;
+ fz_error *error;
+ int t;
+
+ if (stm->dead == 2)
+ return 0;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SWRITE)
+ return -1;
+
+ switch (stm->kind)
+ {
+ case FZ_SFILE:
+ while (buf->rp < buf->wp)
+ {
+ t = write(stm->file, buf->rp, buf->wp - buf->rp);
+ if (t < 0)
+ {
+ stm->error = fz_throw("ioerror: write: %s", strerror(errno));
+ stm->dead = 1;
+ return -1;
+ }
+
+ buf->rp += t;
+ }
+
+ if (buf->rp > buf->bp)
+ fz_rewindbuffer(buf);
+
+ return 0;
+
+ case FZ_SFILTER:
+ return flushfilter(stm);
+
+ case FZ_SBUFFER:
+ if (!buf->eof && buf->wp == buf->ep)
+ {
+ error = fz_growbuffer(buf);
+ if (error)
+ {
+ stm->error = error;
+ stm->dead = 1;
+ return -1;
+ }
+ }
+ return 0;
+ }
+
+ return -1;
+}
+
+/*
+ * Write data to stream.
+ * Buffer until internal buffer is full.
+ * When full, call fz_flush to make more space available.
+ */
+int fz_write(fz_stream *stm, unsigned char *mem, int n)
+{
+ fz_buffer *buf = stm->buffer;
+ int i = 0;
+ int t;
+
+ if (stm->dead == 2)
+ return 0;
+
+ if (stm->dead)
+ return -1;
+
+ if (stm->mode != FZ_SWRITE)
+ return -1;
+
+ while (i < n)
+ {
+ while (buf->wp < buf->ep && i < n)
+ *buf->wp++ = mem[i++];
+
+ if (buf->wp == buf->ep && i < n)
+ {
+ t = fz_flush(stm);
+ if (t < 0)
+ return -1;
+ if (stm->dead)
+ return i;
+ }
+ }
+
+ return n;
+}
+
+int fz_printstr(fz_stream *stm, char *s)
+{
+ return fz_write(stm, s, strlen(s));
+}
+
+int fz_printobj(fz_stream *file, fz_obj *obj, int tight)
+{
+ char buf[1024];
+ char *ptr;
+ int n;
+
+ n = fz_sprintobj(nil, 0, obj, tight);
+ if (n < sizeof buf)
+ {
+ fz_sprintobj(buf, sizeof buf, obj, tight);
+ return fz_write(file, buf, n);
+ }
+ else
+ {
+ ptr = fz_malloc(n);
+ if (!ptr)
+ return -1;
+ fz_sprintobj(ptr, n, obj, tight);
+ n = fz_write(file, ptr, n);
+ fz_free(ptr);
+ return n;
+ }
+}
+
+int fz_print(fz_stream *stm, char *fmt, ...)
+{
+ va_list ap;
+ char buf[1024];
+ char *p;
+ int n;
+
+ va_start(ap, fmt);
+ n = vsnprintf(buf, sizeof buf, fmt, ap);
+ va_end(ap);
+
+ if (n < sizeof buf)
+ return fz_write(stm, buf, n);
+
+ p = fz_malloc(n);
+ if (!p)
+ return -1;
+
+ va_start(ap, fmt);
+ vsnprintf(p, n, fmt, ap);
+ va_end(ap);
+
+ n = fz_write(stm, p, n);
+
+ fz_free(p);
+
+ return n;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-22 16:35:28 +0000