Annotation of embedaddon/php/ext/gd/libgd/gd_io.c, revision 1.1
1.1 ! misho 1:
! 2:
! 3: /*
! 4: * io.c
! 5: *
! 6: * Implements the simple I/O 'helper' routines.
! 7: *
! 8: * Not really essential, but these routines were used extensively in GD,
! 9: * so they were moved here. They also make IOCtx calls look better...
! 10: *
! 11: * Written (or, at least, moved) 1999, Philip Warner.
! 12: *
! 13: */
! 14:
! 15: #include <math.h>
! 16: #include <string.h>
! 17: #include <stdlib.h>
! 18: #include "gd.h"
! 19:
! 20: /* Use this for commenting out debug-print statements. */
! 21: /* Just use the first '#define' to allow all the prints... */
! 22: /*#define IO_DBG(s) (s) */
! 23: #define IO_DBG(s)
! 24:
! 25:
! 26: #define GD_IO_EOF_CHK(r) \
! 27: if (r == EOF) { \
! 28: return 0; \
! 29: } \
! 30:
! 31: /*
! 32: * Write out a word to the I/O context pointer
! 33: */
! 34: void Putword (int w, gdIOCtx * ctx)
! 35: {
! 36: unsigned char buf[2];
! 37:
! 38: buf[0] = w & 0xff;
! 39: buf[1] = (w / 256) & 0xff;
! 40: (ctx->putBuf) (ctx, (char *) buf, 2);
! 41: }
! 42:
! 43: void Putchar (int c, gdIOCtx * ctx)
! 44: {
! 45: (ctx->putC) (ctx, c & 0xff);
! 46: }
! 47:
! 48: void gdPutC (const unsigned char c, gdIOCtx * ctx)
! 49: {
! 50: (ctx->putC) (ctx, c);
! 51: }
! 52:
! 53: void gdPutWord (int w, gdIOCtx * ctx)
! 54: {
! 55: IO_DBG (php_gd_error("Putting word..."));
! 56: (ctx->putC) (ctx, (unsigned char) (w >> 8));
! 57: (ctx->putC) (ctx, (unsigned char) (w & 0xFF));
! 58: IO_DBG (php_gd_error("put."));
! 59: }
! 60:
! 61: void gdPutInt (int w, gdIOCtx * ctx)
! 62: {
! 63: IO_DBG (php_gd_error("Putting int..."));
! 64: (ctx->putC) (ctx, (unsigned char) (w >> 24));
! 65: (ctx->putC) (ctx, (unsigned char) ((w >> 16) & 0xFF));
! 66: (ctx->putC) (ctx, (unsigned char) ((w >> 8) & 0xFF));
! 67: (ctx->putC) (ctx, (unsigned char) (w & 0xFF));
! 68: IO_DBG (php_gd_error("put."));
! 69: }
! 70:
! 71: int gdGetC (gdIOCtx * ctx)
! 72: {
! 73: return ((ctx->getC) (ctx));
! 74: }
! 75:
! 76: int gdGetByte (int *result, gdIOCtx * ctx)
! 77: {
! 78: int r;
! 79: r = (ctx->getC) (ctx);
! 80: GD_IO_EOF_CHK(r);
! 81: *result = r;
! 82: return 1;
! 83: }
! 84:
! 85: int gdGetWord (int *result, gdIOCtx * ctx)
! 86: {
! 87: int r;
! 88: r = (ctx->getC) (ctx);
! 89: GD_IO_EOF_CHK(r);
! 90: *result = r << 8;
! 91: r = (ctx->getC) (ctx);
! 92: GD_IO_EOF_CHK(r);
! 93: *result += r;
! 94: return 1;
! 95: }
! 96:
! 97:
! 98: int gdGetInt (int *result, gdIOCtx * ctx)
! 99: {
! 100: int r;
! 101: r = (ctx->getC) (ctx);
! 102: GD_IO_EOF_CHK(r);
! 103: *result = r << 24;
! 104:
! 105: r = (ctx->getC) (ctx);
! 106: GD_IO_EOF_CHK(r);
! 107: *result += r << 16;
! 108:
! 109: r = (ctx->getC) (ctx);
! 110: if (r == EOF) {
! 111: return 0;
! 112: }
! 113: *result += r << 8;
! 114:
! 115: r = (ctx->getC) (ctx);
! 116: GD_IO_EOF_CHK(r);
! 117: *result += r;
! 118:
! 119: return 1;
! 120: }
! 121:
! 122: int gdPutBuf (const void *buf, int size, gdIOCtx * ctx)
! 123: {
! 124: IO_DBG (php_gd_error("Putting buf..."));
! 125: return (ctx->putBuf) (ctx, buf, size);
! 126: IO_DBG (php_gd_error("put."));
! 127: }
! 128:
! 129: int gdGetBuf (void *buf, int size, gdIOCtx * ctx)
! 130: {
! 131: return (ctx->getBuf) (ctx, buf, size);
! 132: }
! 133:
! 134: int gdSeek (gdIOCtx * ctx, const int pos)
! 135: {
! 136: IO_DBG (php_gd_error("Seeking..."));
! 137: return ((ctx->seek) (ctx, pos));
! 138: IO_DBG (php_gd_error("Done."));
! 139: }
! 140:
! 141: long gdTell (gdIOCtx * ctx)
! 142: {
! 143: IO_DBG (php_gd_error("Telling..."));
! 144: return ((ctx->tell) (ctx));
! 145: IO_DBG (php_gd_error ("told."));
! 146: }
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