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) 2021-2024 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>  /* FP_SEG, FP_OFF */
typedef unsigned short FHANDLE;
 
#endif
 
 
#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) {
  unsigned short 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
 * I use pragma aux directives for more compact size. open-watcom only. */
#ifndef WITHSTDIO
 
static unsigned short FOPEN(const char far *s);
 
#pragma aux FOPEN = \
"push ds" \
"push es" \
"pop ds" \
"mov ax, 0x3D00" /* open file, read-only (fname at DS:DX) */ \
"int 0x21" \
"jnc DONE" \
"xor ax, ax"     /* return 0 on error */ \
"DONE:" \
"pop ds" \
parm [es dx] \
value [ax];
 
 
static void FCLOSE(unsigned short handle);
 
#pragma aux FCLOSE = \
"mov ah, 0x3E" \
"int 0x21" \
modify [ax]  /* AX might contain an error code on failure */ \
parm [bx]
 
 
static unsigned short FREAD(unsigned short handle, void far *buff, unsigned short bytes);
 
#pragma aux FREAD = \
"push ds" \
"push es" \
"pop ds" \
"mov ah, 0x3F"    /* read cx bytes from file handle bx to DS:DX */ \
"int 0x21" \
"jnc ERR" \
"xor ax, ax"      /* return 0 on error */ \
"ERR:" \
"pop ds" \
parm [bx] [es dx] [cx] \
value [ax]
 
 
static void FSEEK(unsigned short handle, unsigned short bytes);
 
#pragma aux FSEEK = \
"mov ax, 0x4201"  /* move file pointer from cur pos + CX:DX */ \
"xor cx, cx" \
"int 0x21" \
parm [bx] [dx] \
modify [ax cx dx]
 
#endif
 
 
int svarlang_load(const char *fname, const char *lang) {
  unsigned short langid;
  unsigned short buff16[2];
  FHANDLE fd;
  signed char exitcode = 0;
  struct {
    unsigned long sig;
    unsigned short string_count;
  } hdr;
 
  langid = *((unsigned short *)lang);
  langid &= 0xDFDF; /* make sure lang is upcase */
 
  fd = FOPEN(fname);
  if (!fd) return(-1);
 
  /* read hdr, sig should be "SvL\x1a" (0x1a4c7653) */
  if ((FREAD(fd, &hdr, 6) != 6) || (hdr.sig != 0x1a4c7653L) || (hdr.string_count != svarlang_string_count)) {
    exitcode = -2;
    goto FCLOSE_AND_EXIT;
  }
 
  for (;;) {
    /* read next lang id and string table size in file */
    if (FREAD(fd, buff16, 4) != 4) {
      exitcode = -3;
      goto FCLOSE_AND_EXIT;
    }
 
    /* is it the lang I am looking for? */
    if (buff16[0] == langid) break;
 
    /* skip to next lang (in two steps to avoid a potential uint16 overflow) */
    FSEEK(fd, svarlang_string_count * 4);
    FSEEK(fd, buff16[1]);
  }
 
  /* load dictionary & strings, but only if I have enough memory space */
  if ((buff16[1] >= svarlang_memsz)
   || (FREAD(fd, svarlang_dict, svarlang_string_count * 4) != svarlang_string_count * 4)
   || (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1])) {
    exitcode = -4;
  }
 
  FCLOSE_AND_EXIT:
 
  FCLOSE(fd);
  return(exitcode);
}
 

Rev 1782	Rev 1783
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) 2021-2024 Mateusz Viste`	4	`* Copyright (C) 2021-2024 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> /* FP_SEG, FP_OFF */`	38	`#include <i86.h> /* FP_SEG, FP_OFF */`
39	`typedef unsigned short FHANDLE;`	39	`typedef unsigned short FHANDLE;`
40		40
41	`#endif`	41	`#endif`
42		42
43		43
44	`#include "svarlang.h"`	44	`#include "svarlang.h"`
45		45
46		46
47	`/* supplied through DEFLANG.C */`	47	`/* supplied through DEFLANG.C */`
48	`extern char svarlang_mem[];`	48	`extern char svarlang_mem[];`
49	`extern unsigned short svarlang_dict[];`	49	`extern unsigned short svarlang_dict[];`
50	`extern const unsigned short svarlang_memsz;`	50	`extern const unsigned short svarlang_memsz;`
51	`extern const unsigned short svarlang_string_count;`	51	`extern const unsigned short svarlang_string_count;`
52		52
53		53
54	`const char *svarlang_strid(unsigned short id) {`	54	`const char *svarlang_strid(unsigned short id) {`
55	`unsigned short left = 0, right = svarlang_string_count - 1, x;`	55	`unsigned short left = 0, right = svarlang_string_count - 1, x;`
56	`unsigned short v;`	56	`unsigned short v;`
57		57
58	`if (svarlang_string_count == 0) return("");`	58	`if (svarlang_string_count == 0) return("");`
59		59
60	`while (left <= right) {`	60	`while (left <= right) {`
61	`x = left + ((right - left ) >> 2);`	61	`x = left + ((right - left ) >> 2);`
62	`v = svarlang_dict[x * 2];`	62	`v = svarlang_dict[x * 2];`
63		63
64	`if (id == v) return(svarlang_mem + svarlang_dict[x * 2 + 1]);`	64	`if (id == v) return(svarlang_mem + svarlang_dict[x * 2 + 1]);`
65		65
66	`if (id > v) {`	66	`if (id > v) {`
67	`left = x + 1;`	67	`left = x + 1;`
68	`} else {`	68	`} else {`
69	`right = x - 1;`	69	`right = x - 1;`
70	`}`	70	`}`
71	`}`	71	`}`
72		72
73	`return("");`	73	`return("");`
74	`}`	74	`}`
75		75
76		76
77	`/* routines below are simplified (dos-based) versions of the libc FILE-related`	77	`/* routines below are simplified (dos-based) versions of the libc FILE-related`
78	`* functions. Using them avoids a dependency on FILE, hence makes the binary`	78	`* functions. Using them avoids a dependency on FILE, hence makes the binary`
79	`* smaller if the application does not need to pull fopen() and friends`	79	`* smaller if the application does not need to pull fopen() and friends`
80	`* I use pragma aux directives for more compact size. open-watcom only. */`	80	`* I use pragma aux directives for more compact size. open-watcom only. */`
81	`#ifndef WITHSTDIO`	81	`#ifndef WITHSTDIO`
82		82
83	`static unsigned short FOPEN(const char far *s);`	83	`static unsigned short FOPEN(const char far *s);`
84		84
85	`#pragma aux FOPEN = \`	85	`#pragma aux FOPEN = \`
86	`"push ds" \`	86	`"push ds" \`
87	`"push es" \`	87	`"push es" \`
88	`"pop ds" \`	88	`"pop ds" \`
89	`"mov ax, 0x3D00" /* open file, read-only (fname at DS:DX) */ \`	89	`"mov ax, 0x3D00" /* open file, read-only (fname at DS:DX) */ \`
90	`"int 0x21" \`	90	`"int 0x21" \`
91	`"jnc DONE" \`	91	`"jnc DONE" \`
92	`"xor ax, ax" \`	92	`"xor ax, ax" /* return 0 on error */ \`
93	`"DONE:" \`	93	`"DONE:" \`
94	`"pop ds" \`	94	`"pop ds" \`
95	`parm [es dx] \`	95	`parm [es dx] \`
96	`value [ax];`	96	`value [ax];`
97		97
98		98
99	`static void FCLOSE(unsigned short handle);`	99	`static void FCLOSE(unsigned short handle);`
100		100
101	`#pragma aux FCLOSE = \`	101	`#pragma aux FCLOSE = \`
102	`"mov ah, 0x3E" \`	102	`"mov ah, 0x3E" \`
103	`"int 0x21" \`	103	`"int 0x21" \`
104	`modify [ax] /* AX might contain an error code on failure */ \`	104	`modify [ax] /* AX might contain an error code on failure */ \`
105	`parm [bx]`	105	`parm [bx]`
106		106
107		107
108	`static unsigned short FREAD(unsigned short handle, void far *buff, unsigned short bytes);`	108	`static unsigned short FREAD(unsigned short handle, void far *buff, unsigned short bytes);`
109		109
110	`#pragma aux FREAD = \`	110	`#pragma aux FREAD = \`
111	`"push ds" \`	111	`"push ds" \`
112	`"push es" \`	112	`"push es" \`
113	`"pop ds" \`	113	`"pop ds" \`
114	`"mov ah, 0x3F" /* read cx bytes from file handle bx to DS:DX */ \`	114	`"mov ah, 0x3F" /* read cx bytes from file handle bx to DS:DX */ \`
115	`"int 0x21" \`	115	`"int 0x21" \`
116	`"jnc ERR" \`	116	`"jnc ERR" \`
117	`"xor ax, ax" /* return 0 on error */ \`	117	`"xor ax, ax" /* return 0 on error */ \`
118	`"ERR:" \`	118	`"ERR:" \`
119	`"pop ds" \`	119	`"pop ds" \`
120	`parm [bx] [es dx] [cx] \`	120	`parm [bx] [es dx] [cx] \`
121	`value [ax]`	121	`value [ax]`
122		122
123		123
124	`static void FSEEK(unsigned short handle, unsigned short bytes);`	124	`static void FSEEK(unsigned short handle, unsigned short bytes);`
125		125
126	`#pragma aux FSEEK = \`	126	`#pragma aux FSEEK = \`
127	`"mov ax, 0x4201" /* move file pointer from cur pos + CX:DX */ \`	127	`"mov ax, 0x4201" /* move file pointer from cur pos + CX:DX */ \`
128	`"xor cx, cx" \`	128	`"xor cx, cx" \`
129	`"int 0x21" \`	129	`"int 0x21" \`
130	`parm [bx] [dx] \`	130	`parm [bx] [dx] \`
131	`modify [ax cx dx]`	131	`modify [ax cx dx]`
132		132
133	`#endif`	133	`#endif`
134		134
135		135
136	`int svarlang_load(const char fname, const char lang) {`	136	`int svarlang_load(const char fname, const char lang) {`
137	`unsigned short langid;`	137	`unsigned short langid;`
138	`unsigned short buff16[2];`	138	`unsigned short buff16[2];`
139	`FHANDLE fd;`	139	`FHANDLE fd;`
140	`signed char exitcode = 0;`	140	`signed char exitcode = 0;`
141	`struct {`	141	`struct {`
142	`unsigned long sig;`	142	`unsigned long sig;`
143	`unsigned short string_count;`	143	`unsigned short string_count;`
144	`} hdr;`	144	`} hdr;`
145		145
146	`langid = ((unsigned short )lang);`	146	`langid = ((unsigned short )lang);`
147	`langid &= 0xDFDF; /* make sure lang is upcase */`	147	`langid &= 0xDFDF; /* make sure lang is upcase */`
148		148
149	`fd = FOPEN(fname);`	149	`fd = FOPEN(fname);`
150	`if (!fd) return(-1);`	150	`if (!fd) return(-1);`
151		151
152	`/* read hdr, sig should be "SvL\x1a" (0x1a4c7653) */`	152	`/* read hdr, sig should be "SvL\x1a" (0x1a4c7653) */`
153	`if ((FREAD(fd, &hdr, 6) != 6) \|\| (hdr.sig != 0x1a4c7653L) \|\| (hdr.string_count != svarlang_string_count)) {`	153	`if ((FREAD(fd, &hdr, 6) != 6) \|\| (hdr.sig != 0x1a4c7653L) \|\| (hdr.string_count != svarlang_string_count)) {`
154	`exitcode = -2;`	154	`exitcode = -2;`
155	`goto FCLOSE_AND_EXIT;`	155	`goto FCLOSE_AND_EXIT;`
156	`}`	156	`}`
157		157
158	`for (;;) {`	158	`for (;;) {`
159	`/* read next lang id and string table size in file */`	159	`/* read next lang id and string table size in file */`
160	`if (FREAD(fd, buff16, 4) != 4) {`	160	`if (FREAD(fd, buff16, 4) != 4) {`
161	`exitcode = -3;`	161	`exitcode = -3;`
162	`goto FCLOSE_AND_EXIT;`	162	`goto FCLOSE_AND_EXIT;`
163	`}`	163	`}`
164		164
165	`/* is it the lang I am looking for? */`	165	`/* is it the lang I am looking for? */`
166	`if (buff16[0] == langid) break;`	166	`if (buff16[0] == langid) break;`
167		167
168	`/* skip to next lang (in two steps to avoid a potential uint16 overflow) */`	168	`/* skip to next lang (in two steps to avoid a potential uint16 overflow) */`
169	`FSEEK(fd, svarlang_string_count * 4);`	169	`FSEEK(fd, svarlang_string_count * 4);`
170	`FSEEK(fd, buff16[1]);`	170	`FSEEK(fd, buff16[1]);`
171	`}`	171	`}`
172		172
173	`/* load dictionary & strings, but only if I have enough memory space */`	173	`/* load dictionary & strings, but only if I have enough memory space */`
174	`if ((buff16[1] >= svarlang_memsz)`	174	`if ((buff16[1] >= svarlang_memsz)`
175	`\|\| (FREAD(fd, svarlang_dict, svarlang_string_count * 4) != svarlang_string_count * 4)`	175	`\|\| (FREAD(fd, svarlang_dict, svarlang_string_count * 4) != svarlang_string_count * 4)`
176	`\|\| (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1])) {`	176	`\|\| (FREAD(fd, svarlang_mem, buff16[1]) != buff16[1])) {`
177	`exitcode = -4;`	177	`exitcode = -4;`
178	`}`	178	`}`
179		179
180	`FCLOSE_AND_EXIT:`	180	`FCLOSE_AND_EXIT:`
181		181
182	`FCLOSE(fd);`	182	`FCLOSE(fd);`
183	`return(exitcode);`	183	`return(exitcode);`
184	`}`	184	`}`
185		185

Subversion Repositories SvarDOS

(root)/svarlang.lib/trunk/svarlang.c – Rev 1782 → 1783