mirror of
https://github.com/php/php-src.git
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147 lines
2.7 KiB
C
147 lines
2.7 KiB
C
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/*
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* io.c
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*
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* Implements the simple I/O 'helper' routines.
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*
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* Not really essential, but these routines were used extensively in GD,
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* so they were moved here. They also make IOCtx calls look better...
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*
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* Written (or, at least, moved) 1999, Philip Warner.
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*
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*/
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#include <math.h>
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#include <string.h>
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#include <stdlib.h>
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#include "gd.h"
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/* Use this for commenting out debug-print statements. */
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/* Just use the first '#define' to allow all the prints... */
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/*#define IO_DBG(s) (s) */
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#define IO_DBG(s)
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#define GD_IO_EOF_CHK(r) \
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if (r == EOF) { \
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return 0; \
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} \
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/*
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* Write out a word to the I/O context pointer
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*/
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void Putword (int w, gdIOCtx * ctx)
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{
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unsigned char buf[2];
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buf[0] = w & 0xff;
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buf[1] = (w / 256) & 0xff;
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(ctx->putBuf) (ctx, (char *) buf, 2);
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}
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void Putchar (int c, gdIOCtx * ctx)
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{
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(ctx->putC) (ctx, c & 0xff);
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}
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void gdPutC (const unsigned char c, gdIOCtx * ctx)
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{
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(ctx->putC) (ctx, c);
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}
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void gdPutWord (int w, gdIOCtx * ctx)
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{
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IO_DBG (php_gd_error("Putting word..."));
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(ctx->putC) (ctx, (unsigned char) (w >> 8));
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(ctx->putC) (ctx, (unsigned char) (w & 0xFF));
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IO_DBG (php_gd_error("put."));
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}
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void gdPutInt (int w, gdIOCtx * ctx)
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{
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IO_DBG (php_gd_error("Putting int..."));
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(ctx->putC) (ctx, (unsigned char) (w >> 24));
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(ctx->putC) (ctx, (unsigned char) ((w >> 16) & 0xFF));
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(ctx->putC) (ctx, (unsigned char) ((w >> 8) & 0xFF));
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(ctx->putC) (ctx, (unsigned char) (w & 0xFF));
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IO_DBG (php_gd_error("put."));
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}
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int gdGetC (gdIOCtx * ctx)
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{
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return ((ctx->getC) (ctx));
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}
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int gdGetByte (int *result, gdIOCtx * ctx)
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{
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int r;
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r = (ctx->getC) (ctx);
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GD_IO_EOF_CHK(r);
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*result = r;
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return 1;
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}
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int gdGetWord (int *result, gdIOCtx * ctx)
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{
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int r;
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r = (ctx->getC) (ctx);
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GD_IO_EOF_CHK(r);
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*result = r << 8;
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r = (ctx->getC) (ctx);
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GD_IO_EOF_CHK(r);
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*result += r;
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return 1;
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}
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int gdGetInt (int *result, gdIOCtx * ctx)
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{
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int r;
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r = (ctx->getC) (ctx);
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GD_IO_EOF_CHK(r);
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*result = r << 24;
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r = (ctx->getC) (ctx);
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GD_IO_EOF_CHK(r);
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*result += r << 16;
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r = (ctx->getC) (ctx);
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if (r == EOF) {
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return 0;
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}
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*result += r << 8;
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r = (ctx->getC) (ctx);
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GD_IO_EOF_CHK(r);
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*result += r;
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return 1;
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}
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int gdPutBuf (const void *buf, int size, gdIOCtx * ctx)
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{
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IO_DBG (php_gd_error("Putting buf..."));
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return (ctx->putBuf) (ctx, buf, size);
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IO_DBG (php_gd_error("put."));
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}
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int gdGetBuf (void *buf, int size, gdIOCtx * ctx)
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{
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return (ctx->getBuf) (ctx, buf, size);
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}
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int gdSeek (gdIOCtx * ctx, const int pos)
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{
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IO_DBG (php_gd_error("Seeking..."));
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return ((ctx->seek) (ctx, pos));
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IO_DBG (php_gd_error("Done."));
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}
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long gdTell (gdIOCtx * ctx)
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{
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IO_DBG (php_gd_error("Telling..."));
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return ((ctx->tell) (ctx));
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IO_DBG (php_gd_error ("told."));
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}
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