WebSVN – SvarDOS – Diff – /svarlang.lib/trunk/svarlang.c


/* This file is part of the svarlang project and is published under the terms
 * of the MIT license.
 *
 * Copyright (C) 2021-2023 Mateusz Viste
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
 
/* if WITHSTDIO is enabled, then remap file operations to use the standard
 * stdio amenities */
#ifdef WITHSTDIO
 
#include <stdio.h>   /* FILE, fopen(), fseek(), etc */
typedef FILE* FHANDLE;
#define FOPEN(x) fopen(x, "rb")
#define FCLOSE(x) fclose(x)
#define FSEEK(f,b) fseek(f,b,SEEK_CUR)
#define FREAD(f,t,b) fread(t, 1, b, f)
 
#else
 
#include <i86.h>
typedef unsigned short FHANDLE;
 
#endif
 
 
 
#include <string.h>  /* strcpy() */
 
#include "svarlang.h"
 
 
/* supplied through DEFLANG.C */
extern char svarlang_mem[];
extern unsigned short svarlang_dict[];
extern const unsigned short svarlang_memsz;
extern const unsigned short svarlang_string_count;
 
 
const char *svarlang_strid(unsigned short id) {
  size_t left = 0, right = svarlang_string_count - 1, x;
  unsigned short v;
 
  if (svarlang_string_count == 0) return("");
 
  while (left <= right) {
    x = left + ( (right - left ) >> 2 );
    v = svarlang_dict[x * 2];
 
    if (id == v) return(svarlang_mem + svarlang_dict[x * 2 + 1]);
 
    if (id > v) {
      left = x + 1;
    } else {
      right = x - 1;
    }
  }
 
 
 
 
 
 
 
 
 
 
  return("");
}
 
 
/* routines below are simplified (dos-based) versions of the libc FILE-related
 * functions. Using them avoids a dependency on FILE, hence makes the binary
 * smaller if the application does not need to pull fopen() and friends */
#ifndef WITHSTDIO
static unsigned short FOPEN(const char *s) {
  unsigned short fname_seg = FP_SEG(s);
  unsigned short fname_off = FP_OFF(s);
  unsigned short res = 0; /* fd 0 is already used by stdout so it's a good error value */
  _asm {
    push dx
    push ds
 
    mov ax, fname_seg
    mov dx, fname_off
    mov ds, ax
    mov ax, 0x3d00  /* open file, read-only (fname at DS:DX) */
    int 0x21
    pop ds
    jc ERR
    mov res, ax
 
    ERR:
    pop dx
  }
 
  return(res);
}
 
 
static void FCLOSE(unsigned short handle) {
  _asm {
    push bx
 
    mov ah, 0x3e
    mov bx, handle
    int 0x21
 
    pop bx
  }
}
 
 
static unsigned short FREAD(unsigned short handle, void *buff, unsigned short bytes) {
  unsigned short buff_seg = FP_SEG(buff);
  unsigned short buff_off = FP_OFF(buff);
  unsigned short res = 0;
 
  _asm {
    push bx
    push cx
    push dx
 
    mov bx, handle
    mov cx, bytes
    mov dx, buff_off
    mov ax, buff_seg
    push ds
    mov ds, ax
    mov ah, 0x3f    /* read cx bytes from file handle bx to DS:DX */
    int 0x21
    pop ds
    jc ERR
 
    mov res, ax
    ERR:
 
    pop dx
    pop cx
    pop bx
  }
 
  return(res);
}
 
 
static void FSEEK(unsigned short handle, unsigned short bytes) {
  _asm {
    push bx
    push cx
    push dx
 
    mov ax, 0x4201  /* move file pointer from cur pos + CX:DX */
    mov bx, handle
    xor cx, cx
    mov dx, bytes
    int 0x21
 
    pop dx
    pop cx
    pop bx
  }
}
#endif
 
 
int svarlang_load(const char *fname, const char *lang) {
  unsigned short langid;
  unsigned long hdr;
  unsigned short buff16[2];
  FHANDLE fd;
  unsigned short string_count;
 
  langid = *((unsigned short *)lang);
  langid &= 0xDFDF; /* make sure lang is upcase */
 
  fd = FOPEN(fname);
  if (!fd) return(-1);
 
  /* read hdr, should be "SvL\x1a" */
  if ((FREAD(fd, &hdr, 4) != 4) || (hdr != 0x1a4c7653L)) { /* 0x1a4c7653 = 'SvL\x1a' */
    FCLOSE(fd);
    return(-3);
  }
 
  /* read string count */
  if ((FREAD(fd, &string_count, 2) != 2) || (string_count != svarlang_string_count)) {
    FCLOSE(fd);
    return(-6);
  }
 
  /* read next lang id and string table size in file */
  while (FREAD(fd, buff16, 4) == 4) {
 
    /* is it the lang I am looking for? */
    if (buff16[0] != langid) { /* skip to next lang */
      FSEEK(fd, svarlang_string_count * 4);
      FSEEK(fd, buff16[1]);
      continue;
    }
 
    /* found - but do I have enough memory space? */
    if (buff16[1] >= svarlang_memsz) {
      FCLOSE(fd);
      return(-4);
    }
 
    /* load dictionary & strings */
    if ((FREAD(fd, svarlang_dict, svarlang_string_count * 4) != svarlang_string_count * 4) ||
       (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1])) {
      FCLOSE(fd);
      return -7;
    }
    FCLOSE(fd);
    return(0);
  }
 
  FCLOSE(fd);
  return(-5);
}
 

Rev 1293	Rev 1298
1	`/* This file is part of the svarlang project and is published under the terms`	1	`/* This file is part of the svarlang project and is published under the terms`
2	`* of the MIT license.`	2	`* of the MIT license.`
3	`*`	3	`*`
4	`* Copyright (C) 2021-2023 Mateusz Viste`	4	`* Copyright (C) 2021-2023 Mateusz Viste`
5	`*`	5	`*`
6	`* Permission is hereby granted, free of charge, to any person obtaining a`	6	`* Permission is hereby granted, free of charge, to any person obtaining a`
7	`* copy of this software and associated documentation files (the "Software"),`	7	`* copy of this software and associated documentation files (the "Software"),`
8	`* to deal in the Software without restriction, including without limitation`	8	`* to deal in the Software without restriction, including without limitation`
9	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`	9	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`
10	`* and/or sell copies of the Software, and to permit persons to whom the`	10	`* and/or sell copies of the Software, and to permit persons to whom the`
11	`* Software is furnished to do so, subject to the following conditions:`	11	`* Software is furnished to do so, subject to the following conditions:`
12	`*`	12	`*`
13	`* The above copyright notice and this permission notice shall be included in`	13	`* The above copyright notice and this permission notice shall be included in`
14	`* all copies or substantial portions of the Software.`	14	`* all copies or substantial portions of the Software.`
15	`*`	15	`*`
16	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`	16	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`
17	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`	17	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
18	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`	18	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`
19	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`	19	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`
20	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`	20	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`
21	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`	21	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`
22	`* DEALINGS IN THE SOFTWARE.`	22	`* DEALINGS IN THE SOFTWARE.`
23	`*/`	23	`*/`
24		24
25	`/* if WITHSTDIO is enabled, then remap file operations to use the standard`	25	`/* if WITHSTDIO is enabled, then remap file operations to use the standard`
26	`* stdio amenities */`	26	`* stdio amenities */`
27	`#ifdef WITHSTDIO`	27	`#ifdef WITHSTDIO`
28		28
29	`#include <stdio.h> /* FILE, fopen(), fseek(), etc */`	29	`#include <stdio.h> /* FILE, fopen(), fseek(), etc */`
30	`typedef FILE* FHANDLE;`	30	`typedef FILE* FHANDLE;`
31	`#define FOPEN(x) fopen(x, "rb")`	31	`#define FOPEN(x) fopen(x, "rb")`
32	`#define FCLOSE(x) fclose(x)`	32	`#define FCLOSE(x) fclose(x)`
33	`#define FSEEK(f,b) fseek(f,b,SEEK_CUR)`	33	`#define FSEEK(f,b) fseek(f,b,SEEK_CUR)`
34	`#define FREAD(f,t,b) fread(t, 1, b, f)`	34	`#define FREAD(f,t,b) fread(t, 1, b, f)`
35		35
36	`#else`	36	`#else`
37		37
38	`#include <i86.h>`	38	`#include <i86.h>`
39	`typedef unsigned short FHANDLE;`	39	`typedef unsigned short FHANDLE;`
40		40
41	`#endif`	41	`#endif`
42		42
43	`#include <stdlib.h> /* NULL */`	-
-		43
44	`#include <string.h> /* memcmp(), strcpy() */`	44	`#include <string.h> /* strcpy() */`
45		45
46	`#include "svarlang.h"`	46	`#include "svarlang.h"`
47		47
48		48
49	`/* supplied through DEFLANG.C */`	49	`/* supplied through DEFLANG.C */`
50	`extern char svarlang_mem[];`	50	`extern char svarlang_mem[];`
51	`extern unsigned short svarlang_dict[];`	51	`extern unsigned short svarlang_dict[];`
52	`extern const unsigned short svarlang_memsz;`	52	`extern const unsigned short svarlang_memsz;`
53	`extern const unsigned short svarlang_string_count;`	53	`extern const unsigned short svarlang_string_count;`
54		54
-		55
55	`const char *svarlang_strid(unsigned short id) {`	56	`const char *svarlang_strid(unsigned short id) {`
56	`size_t left = 0, right = svarlang_string_count - 1, x;`	57	`size_t left = 0, right = svarlang_string_count - 1, x;`
57	`unsigned short v;`	58	`unsigned short v;`
-		59
-		60	`if (svarlang_string_count == 0) return("");`
-		61
-		62	`while (left <= right) {`
-		63	`x = left + ( (right - left ) >> 2 );`
-		64	`v = svarlang_dict[x * 2];`
-		65
-		66	`if (id == v) return(svarlang_mem + svarlang_dict[x * 2 + 1]);`
58		67
-		68	`if (id > v) {`
-		69	`left = x + 1;`
-		70	`} else {`
59	`if (svarlang_string_count == 0) return "";`	71	`right = x - 1;`
-		72	`}`
-		73	`}`
60		74
61	`while (left <= right ) {`	-
62	`x = left + ( (right - left ) >> 2 );`	-
63	`v = svarlang_dict[x * 2];`	-
64	`if ( id == v ) {`	-
65	`return svarlang_mem + svarlang_dict[x * 2 + 1];`	-
66	`}`	-
67	`else if ( id > v ) left = x + 1;`	-
68	`else right = x - 1;`	-
69	`}`	-
70	`return "";`	75	`return("");`
71	`}`	76	`}`
72		77
73		78
74	`/* routines below are simplified (dos-based) versions of the libc FILE-related`	79	`/* routines below are simplified (dos-based) versions of the libc FILE-related`
75	`* functions. Using them avoids a dependency on FILE, hence makes the binary`	80	`* functions. Using them avoids a dependency on FILE, hence makes the binary`
76	`* smaller if the application does not need to pull fopen() and friends */`	81	`* smaller if the application does not need to pull fopen() and friends */`
77	`#ifndef WITHSTDIO`	82	`#ifndef WITHSTDIO`
78	`static unsigned short FOPEN(const char *s) {`	83	`static unsigned short FOPEN(const char *s) {`
79	`unsigned short fname_seg = FP_SEG(s);`	84	`unsigned short fname_seg = FP_SEG(s);`
80	`unsigned short fname_off = FP_OFF(s);`	85	`unsigned short fname_off = FP_OFF(s);`
81	`unsigned short res = 0; /* fd 0 is already used by stdout so it's a good error value */`	86	`unsigned short res = 0; /* fd 0 is already used by stdout so it's a good error value */`
82	`_asm {`	87	`_asm {`
83	`push dx`	88	`push dx`
84	`push ds`	89	`push ds`
85		90
86	`mov ax, fname_seg`	91	`mov ax, fname_seg`
87	`mov dx, fname_off`	92	`mov dx, fname_off`
88	`mov ds, ax`	93	`mov ds, ax`
89	`mov ax, 0x3d00 /* open file, read-only (fname at DS:DX) */`	94	`mov ax, 0x3d00 /* open file, read-only (fname at DS:DX) */`
90	`int 0x21`	95	`int 0x21`
91	`pop ds`	96	`pop ds`
92	`jc ERR`	97	`jc ERR`
93	`mov res, ax`	98	`mov res, ax`
94		99
95	`ERR:`	100	`ERR:`
96	`pop dx`	101	`pop dx`
97	`}`	102	`}`
98		103
99	`return(res);`	104	`return(res);`
100	`}`	105	`}`
101		106
102		107
103	`static void FCLOSE(unsigned short handle) {`	108	`static void FCLOSE(unsigned short handle) {`
104	`_asm {`	109	`_asm {`
105	`push bx`	110	`push bx`
106		111
107	`mov ah, 0x3e`	112	`mov ah, 0x3e`
108	`mov bx, handle`	113	`mov bx, handle`
109	`int 0x21`	114	`int 0x21`
110		115
111	`pop bx`	116	`pop bx`
112	`}`	117	`}`
113	`}`	118	`}`
114		119
115		120
116	`static unsigned short FREAD(unsigned short handle, void *buff, unsigned short bytes) {`	121	`static unsigned short FREAD(unsigned short handle, void *buff, unsigned short bytes) {`
117	`unsigned short buff_seg = FP_SEG(buff);`	122	`unsigned short buff_seg = FP_SEG(buff);`
118	`unsigned short buff_off = FP_OFF(buff);`	123	`unsigned short buff_off = FP_OFF(buff);`
119	`unsigned short res = 0;`	124	`unsigned short res = 0;`
120		125
121	`_asm {`	126	`_asm {`
122	`push bx`	127	`push bx`
123	`push cx`	128	`push cx`
124	`push dx`	129	`push dx`
125		130
126	`mov bx, handle`	131	`mov bx, handle`
127	`mov cx, bytes`	132	`mov cx, bytes`
128	`mov dx, buff_off`	133	`mov dx, buff_off`
129	`mov ax, buff_seg`	134	`mov ax, buff_seg`
130	`push ds`	135	`push ds`
131	`mov ds, ax`	136	`mov ds, ax`
132	`mov ah, 0x3f /* read cx bytes from file handle bx to DS:DX */`	137	`mov ah, 0x3f /* read cx bytes from file handle bx to DS:DX */`
133	`int 0x21`	138	`int 0x21`
134	`pop ds`	139	`pop ds`
135	`jc ERR`	140	`jc ERR`
136		141
137	`mov res, ax`	142	`mov res, ax`
138	`ERR:`	143	`ERR:`
139		144
140	`pop dx`	145	`pop dx`
141	`pop cx`	146	`pop cx`
142	`pop bx`	147	`pop bx`
143	`}`	148	`}`
144		149
145	`return(res);`	150	`return(res);`
146	`}`	151	`}`
147		152
148		153
149	`static void FSEEK(unsigned short handle, unsigned short bytes) {`	154	`static void FSEEK(unsigned short handle, unsigned short bytes) {`
150	`_asm {`	155	`_asm {`
151	`push bx`	156	`push bx`
152	`push cx`	157	`push cx`
153	`push dx`	158	`push dx`
154		159
155	`mov ax, 0x4201 /* move file pointer from cur pos + CX:DX */`	160	`mov ax, 0x4201 /* move file pointer from cur pos + CX:DX */`
156	`mov bx, handle`	161	`mov bx, handle`
157	`xor cx, cx`	162	`xor cx, cx`
158	`mov dx, bytes`	163	`mov dx, bytes`
159	`int 0x21`	164	`int 0x21`
160		165
161	`pop dx`	166	`pop dx`
162	`pop cx`	167	`pop cx`
163	`pop bx`	168	`pop bx`
164	`}`	169	`}`
165	`}`	170	`}`
166	`#endif`	171	`#endif`
167		172
168		173
169	`int svarlang_load(const char fname, const char lang) {`	174	`int svarlang_load(const char fname, const char lang) {`
170	`unsigned short langid;`	175	`unsigned short langid;`
171	`unsigned long hdr;`	176	`unsigned long hdr;`
172	`unsigned short buff16[2];`	177	`unsigned short buff16[2];`
173	`FHANDLE fd;`	178	`FHANDLE fd;`
174	`unsigned short string_count;`	179	`unsigned short string_count;`
175		180
176	`langid = ((unsigned short )lang);`	181	`langid = ((unsigned short )lang);`
177	`langid &= 0xDFDF; /* make sure lang is upcase */`	182	`langid &= 0xDFDF; /* make sure lang is upcase */`
178		183
179	`fd = FOPEN(fname);`	184	`fd = FOPEN(fname);`
180	`if (!fd) return(-1);`	185	`if (!fd) return(-1);`
181		186
182	`/* read hdr, should be "SvL\x1a" */`	187	`/* read hdr, should be "SvL\x1a" */`
183	`if ((FREAD(fd, &hdr, 4) != 4) \|\| (hdr != 0x1a4c7653L)) { /* 0x1a4c7653 = 'SvL\x1a' */`	188	`if ((FREAD(fd, &hdr, 4) != 4) \|\| (hdr != 0x1a4c7653L)) { /* 0x1a4c7653 = 'SvL\x1a' */`
184	`FCLOSE(fd);`	189	`FCLOSE(fd);`
185	`return(-3);`	190	`return(-3);`
186	`}`	191	`}`
187		192
188	`/* read string count */`	193	`/* read string count */`
189	`if ((FREAD(fd, &string_count, 2) != 2) \|\| (string_count != svarlang_string_count)) {`	194	`if ((FREAD(fd, &string_count, 2) != 2) \|\| (string_count != svarlang_string_count)) {`
190	`FCLOSE(fd);`	195	`FCLOSE(fd);`
191	`return(-6);`	196	`return(-6);`
192	`}`	197	`}`
193		198
194	`/* read next lang id and string table size in file */`	199	`/* read next lang id and string table size in file */`
195	`while (FREAD(fd, buff16, 4) == 4) {`	200	`while (FREAD(fd, buff16, 4) == 4) {`
196		201
197	`/* is it the lang I am looking for? */`	202	`/* is it the lang I am looking for? */`
198	`if (buff16[0] != langid) { /* skip to next lang */`	203	`if (buff16[0] != langid) { /* skip to next lang */`
199	`FSEEK(fd, svarlang_string_count * 4);`	204	`FSEEK(fd, svarlang_string_count * 4);`
200	`FSEEK(fd, buff16[1]);`	205	`FSEEK(fd, buff16[1]);`
201	`continue;`	206	`continue;`
202	`}`	207	`}`
203		208
204	`/* found - but do I have enough memory space? */`	209	`/* found - but do I have enough memory space? */`
205	`if (buff16[1] >= svarlang_memsz) {`	210	`if (buff16[1] >= svarlang_memsz) {`
206	`FCLOSE(fd);`	211	`FCLOSE(fd);`
207	`return(-4);`	212	`return(-4);`
208	`}`	213	`}`
209		214
210	`/* load dictionary & strings */`	215	`/* load dictionary & strings */`
211	`if ((FREAD(fd, svarlang_dict, svarlang_string_count * 4) != svarlang_string_count * 4) \|\|`	216	`if ((FREAD(fd, svarlang_dict, svarlang_string_count * 4) != svarlang_string_count * 4) \|\|`
212	`(FREAD(fd, svarlang_mem, buff16[1]) != buff16[1])) {`	217	`(FREAD(fd, svarlang_mem, buff16[1]) != buff16[1])) {`
213	`FCLOSE(fd);`	218	`FCLOSE(fd);`
214	`return -7;`	219	`return -7;`
215	`}`	220	`}`
216	`FCLOSE(fd);`	221	`FCLOSE(fd);`
217	`return(0);`	222	`return(0);`
218	`}`	223	`}`
219		224
220	`FCLOSE(fd);`	225	`FCLOSE(fd);`
221	`return(-5);`	226	`return(-5);`
222	`}`	227	`}`
223		228

Subversion Repositories SvarDOS

(root)/svarlang.lib/trunk/svarlang.c – Rev 1293 → 1298