th-libs: th_ioctx_mem.c annotate

annotate th_ioctx_mem.c @ 693:a622d21833e1

Implement fopen() in mem ioctx, and simplistic read-only/write flag support.

author	Matti Hamalainen <ccr@tnsp.org>
date	Mon, 09 Mar 2020 18:54:37 +0200
parents	ea6bcbfb9d18
children	0fc5ddaccc57

rev	line source
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	1 /*
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	2 * Simple I/O abstraction and context handling layer
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	3 * Programmed and designed by Matti 'ccr' Hamalainen
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	4 * (C) Copyright 2012-2020 Tecnic Software productions (TNSP)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	5 *
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	6 * Please read file 'COPYING' for information on license and distribution.
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	7 */
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	8 #include "th_ioctx.h"
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	9
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	10
693 a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	11 static int th_mem_fopen(th_ioctx *ctx)
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	12 {
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	13 if (ctx->mode == NULL)
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	14 return THERR_NULLPTR;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	15
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	16 // Setup some things based on the mode string
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	17 switch (ctx->mode[0])
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	18 {
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	19 case 'a':
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	20 // Append
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	21 ctx->memWrite = TRUE;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	22 ctx->memOffset = ctx->memSize;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	23 break;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	24
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	25 case 'r':
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	26 // Read or read-write
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	27 ctx->memWrite = ctx->mode[1] == '+';
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	28 ctx->memOffset = 0;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	29 break;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	30
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	31 case 'w':
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	32 // Write, so truncate size
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	33 ctx->memOffset = 0;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	34 ctx->memSize = 0;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	35 ctx->memWrite = TRUE;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	36 break;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	37
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	38 default:
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	39 return THERR_INVALID_ARGS;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	40 }
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	41
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	42 return THERR_OK;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	43 }
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	44
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	45
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	46 static BOOL th_mem_realloc(th_ioctx *ctx, const size_t newSize)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	47 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	48 size_t grow;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	49
693 a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	50 // Check write flag
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	51 if (!ctx->memWrite)
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	52 {
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	53 ctx->status = THERR_FWRITE;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	54 return FALSE;
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	55 }
a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	56
692 ea6bcbfb9d18 Comments and cleanup. Matti Hamalainen <ccr@tnsp.org> parents: 681 diff changeset	57 // Check against max size
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	58 if (ctx->maxSize > 0 && newSize > ctx->maxSize)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	59 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	60 ctx->status = THERR_BOUNDS;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	61 return FALSE;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	62 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	63
692 ea6bcbfb9d18 Comments and cleanup. Matti Hamalainen <ccr@tnsp.org> parents: 681 diff changeset	64 // New size is smaller than old
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	65 if (newSize < ctx->memAlloc)
692 ea6bcbfb9d18 Comments and cleanup. Matti Hamalainen <ccr@tnsp.org> parents: 681 diff changeset	66 goto out;
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	67
692 ea6bcbfb9d18 Comments and cleanup. Matti Hamalainen <ccr@tnsp.org> parents: 681 diff changeset	68 // Compute the allocation grow amount
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	69 grow = (ctx->minAlloc > 0) ? ctx->minAlloc : 8 * 1024;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	70 if (newSize - ctx->memAlloc > grow)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	71 grow += newSize - ctx->memAlloc;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	72
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	73 if (ctx->maxSize > 0 && ctx->memAlloc + grow >= ctx->maxSize)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	74 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	75 ctx->status = THERR_BOUNDS;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	76 return FALSE;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	77 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	78
692 ea6bcbfb9d18 Comments and cleanup. Matti Hamalainen <ccr@tnsp.org> parents: 681 diff changeset	79 // Grow the buffer
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	80 ctx->memAlloc += grow;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	81 if ((ctx->memData = th_realloc(ctx->memData, ctx->memAlloc)) == NULL)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	82 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	83 ctx->status = THERR_MALLOC;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	84 return FALSE;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	85 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	86
692 ea6bcbfb9d18 Comments and cleanup. Matti Hamalainen <ccr@tnsp.org> parents: 681 diff changeset	87 out:
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	88 ctx->memSize = newSize;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	89
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	90 return TRUE;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	91 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	92
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	93
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	94 static int th_mem_freset(th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	95 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	96 ctx->memOffset = 0;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	97 return THERR_OK;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	98 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	99
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	100
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	101 static int th_mem_ferror(th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	102 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	103 return ctx->status;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	104 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	105
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	106
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	107 static int th_mem_fseek(th_ioctx *ctx, const off_t offset, const int whence)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	108 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	109 off_t newPos;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	110
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	111 // Calculate the new position
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	112 switch (whence)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	113 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	114 case SEEK_SET:
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	115 newPos = offset;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	116 break;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	117
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	118 case SEEK_CUR:
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	119 newPos = ctx->memOffset + offset;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	120 break;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	121
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	122 case SEEK_END:
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	123 newPos = ctx->memSize + offset;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	124 break;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	125
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	126 default:
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	127 return -1;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	128 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	129
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	130 // Set the new position
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	131 ctx->memOffset = newPos;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	132
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	133 // Check the new position
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	134 if (newPos < 0)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	135 return -1;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	136
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	137 //if (!th_mem_realloc(ctx, newPos))
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	138 // return -1;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	139
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	140 return 0;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	141 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	142
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	143
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	144 static off_t th_mem_fsize(th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	145 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	146 return ctx->memSize;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	147 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	148
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	149
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	150 static off_t th_mem_ftell(th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	151 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	152 return ctx->memOffset;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	153 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	154
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	155
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	156 static BOOL th_mem_feof(th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	157 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	158 return ((size_t) ctx->memOffset) >= ctx->memSize;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	159 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	160
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	161
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	162 static int th_mem_fgetc(th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	163 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	164 // Check for EOF
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	165 if ((size_t) ctx->memOffset < ctx->memSize)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	166 return ctx->memData[ctx->memOffset++];
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	167 else
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	168 return EOF;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	169 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	170
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	171
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	172 static size_t th_mem_fread(void buf, size_t size, size_t nmemb, th_ioctx ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	173 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	174 size_t length = size * nmemb;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	175
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	176 // Check if we can read the whole chunk
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	177 if (((size_t) ctx->memOffset + length) >= ctx->memSize)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	178 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	179 nmemb = (ctx->memSize - ctx->memOffset) / size;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	180 length = size * nmemb;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	181 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	182
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	183 memcpy(buf, ctx->memData + ctx->memOffset, length);
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	184 ctx->memOffset += length;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	185 return nmemb;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	186 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	187
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	188
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	189 static int th_mem_fputc(int ch, th_ioctx *ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	190 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	191 // Check for EOF
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	192 if (!th_mem_realloc(ctx, ctx->memOffset + 1))
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	193 return EOF;
681 81d1a3f53b87 Cosmetic. Matti Hamalainen <ccr@tnsp.org> parents: 678 diff changeset	194
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	195 ctx->memData[ctx->memOffset++] = ch;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	196 return ch;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	197 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	198
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	199
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	200 static size_t th_mem_fwrite(const void buf, size_t size, size_t nmemb, th_ioctx ctx)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	201 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	202 size_t length = size * nmemb;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	203
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	204 // Check if we can write the whole chunk
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	205 if (!th_mem_realloc(ctx, ctx->memOffset + length))
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	206 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	207 nmemb = (ctx->memSize - ctx->memOffset) / size;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	208 length = size * nmemb;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	209 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	210
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	211 if (length > 0)
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	212 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	213 memcpy(ctx->memData + ctx->memOffset, buf, length);
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	214 ctx->memOffset += length;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	215 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	216 return nmemb;
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	217 }
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	218
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	219
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	220 const th_ioctx_ops th_mem_io_ops =
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	221 {
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	222 "MemIO",
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	223
693 a622d21833e1 Implement fopen() in mem ioctx, and simplistic read-only/write flag support. Matti Hamalainen <ccr@tnsp.org> parents: 692 diff changeset	224 th_mem_fopen,
678 7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	225 NULL,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	226
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	227 th_mem_freset,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	228 th_mem_ferror,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	229 th_mem_fseek,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	230 th_mem_fsize,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	231 th_mem_ftell,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	232 th_mem_feof,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	233 th_mem_fgetc,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	234 th_mem_fputc,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	235 th_mem_fread,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	236 th_mem_fwrite,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	237
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	238 NULL,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	239 NULL,
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	240 NULL
7e207f1023d9 Split stdio and memio stuff to separate files from th_stdio.c Matti Hamalainen <ccr@tnsp.org> parents: diff changeset	241 };

Mercurial > hg > th-libs

annotate th_ioctx_mem.c @ 693:a622d21833e1