WebSVN – SvarDOS – Diff – /svarlang.lib/tags/20220226/svarlang.c


/* This file is part of the svarlang project and is published under the terms
 * of the MIT license.
 *
 * Copyright (C) 2021-2022 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.
 */
 
#include <i86.h>
#include <stdlib.h>  /* NULL */
#include <string.h>  /* memcmp(), strcpy() */
 
#include "svarlang.h"
 
 
/* supplied through DEFLANG.C */
extern char svarlang_mem[];
extern const unsigned short svarlang_memsz;
 
 
const char *svarlang_strid(unsigned short id) {
  const char *ptr = svarlang_mem;
  /* find the string id in langblock memory */
  for (;;) {
    if (((unsigned short *)ptr)[0] == id) return(ptr + 4);
    if (((unsigned short *)ptr)[1] == 0) return(ptr + 2); /* end of strings - return an empty string */
    ptr += ((unsigned short *)ptr)[1] + 4;
  }
}
 
 
static unsigned short FOPEN(const char *s) {
  unsigned short fname_seg = FP_SEG(s);
  unsigned short fname_off = FP_OFF(s);
  unsigned short res = 0xffff;
  _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 FJUMP(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
  }
}
 
 
int svarlang_load(const char *progname, const char *lang, const char *nlspath) {
  unsigned short langid;
  unsigned short fd;
  char buff[128];
  unsigned short buff16[2];
  unsigned short i;
 
  if (lang == NULL) return(-1);
  if (nlspath == NULL) nlspath = ""; /* nlspath can be NULL, treat is as empty */
 
  langid = *((unsigned short *)lang);
  langid &= 0xDFDF; /* make sure lang is upcase */
 
  TRYNEXTPATH:
 
  /* skip any leading ';' separators */
  while (*nlspath == ';') nlspath++;
 
  /* copy nlspath to buff and remember len */
  for (i = 0; (nlspath[i] != 0) && (nlspath[i] != ';'); i++) buff[i] = nlspath[i];
  nlspath += i;
 
  /* add a trailing backslash if there is none (non-empty paths empty) */
  if ((i > 0) && (buff[i - 1] != '\\')) buff[i++] = '\\';
 
  strcpy(buff + i, progname);
  strcat(buff + i, ".lng");
 
  fd = FOPEN(buff);
  if (fd == 0xffff) { /* failed to open file - either abort or try next path */
    if (*nlspath == 0) return(-2);
    goto TRYNEXTPATH;
  }
 
  /* read hdr, should be "SvL\33" */
  if ((FREAD(fd, buff, 4) != 4) || (memcmp(buff, "SvL\33", 4) != 0)) {
    FCLOSE(fd);
    return(-3);
  }
 
  /* read next lang id in file */
  while (FREAD(fd, buff16, 4) == 4) {
 
    /* is it the lang I am looking for? */
    if (buff16[0] != langid) { /* skip to next lang */
      FJUMP(fd, buff16[1]);
      continue;
    }
 
    /* found - but do I have enough memory space? */
    if (buff16[1] >= svarlang_memsz) {
      FCLOSE(fd);
      return(-4);
    }
 
    /* load strings */
    if (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1]) break;
    FCLOSE(fd);
    return(0);
  }
 
  FCLOSE(fd);
  return(-5);
}
 

Rev 971	Rev 972
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) 2021-2022 Mateusz Viste`	4	`* Copyright (C) 2021-2022 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	`#include <i86.h>`	25	`#include <i86.h>`
26	`#include <stdlib.h> /* NULL */`	26	`#include <stdlib.h> /* NULL */`
27	`#include <string.h> /* memcmp(), strcpy() */`	27	`#include <string.h> /* memcmp(), strcpy() */`
28		28
29	`#include "svarlang.h"`	29	`#include "svarlang.h"`
30		30
31		31
32	`/* supplied through DEFLANG.C */`	32	`/* supplied through DEFLANG.C */`
33	`extern char svarlang_mem[];`	33	`extern char svarlang_mem[];`
34	`extern const unsigned short svarlang_memsz;`	34	`extern const unsigned short svarlang_memsz;`
35		35
36		36
37	`const char *svarlang_strid(unsigned short id) {`	37	`const char *svarlang_strid(unsigned short id) {`
38	`const char *ptr = svarlang_mem;`	38	`const char *ptr = svarlang_mem;`
39	`/* find the string id in langblock memory */`	39	`/* find the string id in langblock memory */`
40	`for (;;) {`	40	`for (;;) {`
41	`if (((unsigned short *)ptr)[0] == id) return(ptr + 4);`	41	`if (((unsigned short *)ptr)[0] == id) return(ptr + 4);`
42	`if (((unsigned short )ptr)[1] == 0) return(ptr + 2); / end of strings - return an empty string */`	42	`if (((unsigned short )ptr)[1] == 0) return(ptr + 2); / end of strings - return an empty string */`
43	`ptr += ((unsigned short *)ptr)[1] + 4;`	43	`ptr += ((unsigned short *)ptr)[1] + 4;`
44	`}`	44	`}`
45	`}`	45	`}`
46		46
47		47
48	`static unsigned short FOPEN(const char *s) {`	48	`static unsigned short FOPEN(const char *s) {`
49	`unsigned short fname_seg = FP_SEG(s);`	49	`unsigned short fname_seg = FP_SEG(s);`
50	`unsigned short fname_off = FP_OFF(s);`	50	`unsigned short fname_off = FP_OFF(s);`
51	`unsigned short res = 0xffff;`	51	`unsigned short res = 0xffff;`
52	`_asm {`	52	`_asm {`
53	`push dx`	53	`push dx`
54	`push ds`	54	`push ds`
55		55
56	`mov ax, fname_seg`	56	`mov ax, fname_seg`
57	`mov dx, fname_off`	57	`mov dx, fname_off`
58	`mov ds, ax`	58	`mov ds, ax`
59	`mov ax, 0x3d00 /* open file, read-only (fname at DS:DX) */`	59	`mov ax, 0x3d00 /* open file, read-only (fname at DS:DX) */`
60	`int 0x21`	60	`int 0x21`
61	`pop ds`	61	`pop ds`
62	`jc ERR`	62	`jc ERR`
63	`mov res, ax`	63	`mov res, ax`
64		64
65	`ERR:`	65	`ERR:`
66	`pop dx`	66	`pop dx`
67	`}`	67	`}`
68		68
69	`return(res);`	69	`return(res);`
70	`}`	70	`}`
71		71
72		72
73	`static void FCLOSE(unsigned short handle) {`	73	`static void FCLOSE(unsigned short handle) {`
74	`_asm {`	74	`_asm {`
75	`push bx`	75	`push bx`
76		76
77	`mov ah, 0x3e`	77	`mov ah, 0x3e`
78	`mov bx, handle`	78	`mov bx, handle`
79	`int 0x21`	79	`int 0x21`
80		80
81	`pop bx`	81	`pop bx`
82	`}`	82	`}`
83	`}`	83	`}`
84		84
85		85
86	`static unsigned short FREAD(unsigned short handle, void *buff, unsigned short bytes) {`	86	`static unsigned short FREAD(unsigned short handle, void *buff, unsigned short bytes) {`
87	`unsigned short buff_seg = FP_SEG(buff);`	87	`unsigned short buff_seg = FP_SEG(buff);`
88	`unsigned short buff_off = FP_OFF(buff);`	88	`unsigned short buff_off = FP_OFF(buff);`
89	`unsigned short res = 0;`	89	`unsigned short res = 0;`
90		90
91	`_asm {`	91	`_asm {`
92	`push bx`	92	`push bx`
93	`push cx`	93	`push cx`
94	`push dx`	94	`push dx`
95		95
96	`mov bx, handle`	96	`mov bx, handle`
97	`mov cx, bytes`	97	`mov cx, bytes`
98	`mov dx, buff_off`	98	`mov dx, buff_off`
99	`mov ax, buff_seg`	99	`mov ax, buff_seg`
100	`push ds`	100	`push ds`
101	`mov ds, ax`	101	`mov ds, ax`
102	`mov ah, 0x3f /* read cx bytes from file handle bx to DS:DX */`	102	`mov ah, 0x3f /* read cx bytes from file handle bx to DS:DX */`
103	`int 0x21`	103	`int 0x21`
104	`pop ds`	104	`pop ds`
105	`jc ERR`	105	`jc ERR`
106		106
107	`mov res, ax`	107	`mov res, ax`
108	`ERR:`	108	`ERR:`
109		109
110	`pop dx`	110	`pop dx`
111	`pop cx`	111	`pop cx`
112	`pop bx`	112	`pop bx`
113	`}`	113	`}`
114		114
115	`return(res);`	115	`return(res);`
116	`}`	116	`}`
117		117
118		118
119	`static void FJUMP(unsigned short handle, unsigned short bytes) {`	119	`static void FJUMP(unsigned short handle, unsigned short bytes) {`
120	`_asm {`	120	`_asm {`
121	`push bx`	121	`push bx`
122	`push cx`	122	`push cx`
123	`push dx`	123	`push dx`
124		124
125	`mov ax, 0x4201 /* move file pointer from cur pos + CX:DX */`	125	`mov ax, 0x4201 /* move file pointer from cur pos + CX:DX */`
126	`mov bx, handle`	126	`mov bx, handle`
127	`xor cx, cx`	127	`xor cx, cx`
128	`mov dx, bytes`	128	`mov dx, bytes`
129	`int 0x21`	129	`int 0x21`
130		130
131	`pop dx`	131	`pop dx`
132	`pop cx`	132	`pop cx`
133	`pop bx`	133	`pop bx`
134	`}`	134	`}`
135	`}`	135	`}`
136		136
137		137
138	`int svarlang_load(const char progname, const char lang, const char *nlspath) {`	138	`int svarlang_load(const char progname, const char lang, const char *nlspath) {`
139	`unsigned short langid;`	139	`unsigned short langid;`
140	`unsigned short fd;`	140	`unsigned short fd;`
141	`char buff[128];`	141	`char buff[128];`
142	`unsigned short buff16[2];`	142	`unsigned short buff16[2];`
143	`unsigned short i;`	143	`unsigned short i;`
144		144
145	`if (lang == NULL) return(-1);`	145	`if (lang == NULL) return(-1);`
146	`if (nlspath == NULL) nlspath = ""; /* nlspath can be NULL, treat is as empty */`	146	`if (nlspath == NULL) nlspath = ""; /* nlspath can be NULL, treat is as empty */`
147		147
148	`langid = ((unsigned short )lang);`	148	`langid = ((unsigned short )lang);`
149	`langid &= 0xDFDF; /* make sure lang is upcase */`	149	`langid &= 0xDFDF; /* make sure lang is upcase */`
150		150
151	`TRYNEXTPATH:`	151	`TRYNEXTPATH:`
152		152
153	`/* skip any leading ';' separators */`	153	`/* skip any leading ';' separators */`
154	`while (*nlspath == ';') nlspath++;`	154	`while (*nlspath == ';') nlspath++;`
155		155
156	`/* copy nlspath to buff and remember len */`	156	`/* copy nlspath to buff and remember len */`
157	`for (i = 0; (nlspath[i] != 0) && (nlspath[i] != ';'); i++) buff[i] = nlspath[i];`	157	`for (i = 0; (nlspath[i] != 0) && (nlspath[i] != ';'); i++) buff[i] = nlspath[i];`
158	`nlspath += i;`	158	`nlspath += i;`
159		159
160	`/* add a trailing backslash if there is none (non-empty paths empty) */`	160	`/* add a trailing backslash if there is none (non-empty paths empty) */`
161	`if ((i > 0) && (buff[i - 1] != '\\')) buff[i++] = '\\';`	161	`if ((i > 0) && (buff[i - 1] != '\\')) buff[i++] = '\\';`
162		162
163	`strcpy(buff + i, progname);`	163	`strcpy(buff + i, progname);`
164	`strcat(buff + i, ".lng");`	164	`strcat(buff + i, ".lng");`
165		165
166	`fd = FOPEN(buff);`	166	`fd = FOPEN(buff);`
167	`if (fd == 0xffff) { /* failed to open file - either abort or try next path */`	167	`if (fd == 0xffff) { /* failed to open file - either abort or try next path */`
168	`if (*nlspath == 0) return(-2);`	168	`if (*nlspath == 0) return(-2);`
169	`goto TRYNEXTPATH;`	169	`goto TRYNEXTPATH;`
170	`}`	170	`}`
171		171
172	`/* read hdr, should be "SvL\33" */`	172	`/* read hdr, should be "SvL\33" */`
173	`if ((FREAD(fd, buff, 4) != 4) \|\| (memcmp(buff, "SvL\33", 4) != 0)) {`	173	`if ((FREAD(fd, buff, 4) != 4) \|\| (memcmp(buff, "SvL\33", 4) != 0)) {`
174	`FCLOSE(fd);`	174	`FCLOSE(fd);`
175	`return(-3);`	175	`return(-3);`
176	`}`	176	`}`
177		177
178	`/* read next lang id in file */`	178	`/* read next lang id in file */`
179	`while (FREAD(fd, buff16, 4) == 4) {`	179	`while (FREAD(fd, buff16, 4) == 4) {`
180		180
181	`/* is it the lang I am looking for? */`	181	`/* is it the lang I am looking for? */`
182	`if (buff16[0] != langid) { /* skip to next lang */`	182	`if (buff16[0] != langid) { /* skip to next lang */`
183	`FJUMP(fd, buff16[1]);`	183	`FJUMP(fd, buff16[1]);`
184	`continue;`	184	`continue;`
185	`}`	185	`}`
186		186
187	`/* found - but do I have enough memory space? */`	187	`/* found - but do I have enough memory space? */`
188	`if (buff16[1] >= svarlang_memsz) {`	188	`if (buff16[1] >= svarlang_memsz) {`
189	`FCLOSE(fd);`	189	`FCLOSE(fd);`
190	`return(-4);`	190	`return(-4);`
191	`}`	191	`}`
192		192
193	`/* load strings */`	193	`/* load strings */`
194	`if (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1]) break;`	194	`if (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1]) break;`
195	`FCLOSE(fd);`	195	`FCLOSE(fd);`
196	`return(0);`	196	`return(0);`
197	`}`	197	`}`
198		198
199	`FCLOSE(fd);`	199	`FCLOSE(fd);`
200	`return(-5);`	200	`return(-5);`
201	`}`	201	`}`
202		202

Subversion Repositories SvarDOS

(root)/svarlang.lib/tags/20220226/svarlang.c – Rev 971 → 972