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1 | /* |
2 | * Printing interface for PuTTY. |
3 | */ |
4 | |
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5 | #include "putty.h" |
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6 | #include <winspool.h> |
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7 | |
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8 | struct printer_enum_tag { |
9 | int nprinters; |
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10 | DWORD enum_level; |
11 | union { |
12 | LPPRINTER_INFO_4 i4; |
13 | LPPRINTER_INFO_5 i5; |
14 | } info; |
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15 | }; |
16 | |
17 | struct printer_job_tag { |
18 | HANDLE hprinter; |
19 | }; |
20 | |
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21 | static char *printer_add_enum(int param, DWORD level, char *buffer, |
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22 | int offset, int *nprinters_ptr) |
23 | { |
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24 | DWORD needed = 0, nprinters = 0; |
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25 | |
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26 | buffer = sresize(buffer, offset+512, char); |
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27 | |
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28 | /* |
29 | * Exploratory call to EnumPrinters to determine how much space |
30 | * we'll need for the output. Discard the return value since it |
31 | * will almost certainly be a failure due to lack of space. |
32 | */ |
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33 | EnumPrinters(param, NULL, level, buffer+offset, 512, |
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34 | &needed, &nprinters); |
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35 | |
36 | if (needed < 512) |
37 | needed = 512; |
38 | |
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39 | buffer = sresize(buffer, offset+needed, char); |
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40 | |
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41 | if (EnumPrinters(param, NULL, level, buffer+offset, |
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42 | needed, &needed, &nprinters) == 0) |
43 | return NULL; |
44 | |
45 | *nprinters_ptr += nprinters; |
46 | |
47 | return buffer; |
48 | } |
49 | |
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50 | printer_enum *printer_start_enum(int *nprinters_ptr) |
51 | { |
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52 | printer_enum *ret = snew(printer_enum); |
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53 | char *buffer = NULL, *retval; |
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54 | |
55 | *nprinters_ptr = 0; /* default return value */ |
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56 | buffer = snewn(512, char); |
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57 | |
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58 | /* |
59 | * Determine what enumeration level to use. |
60 | * When enumerating printers, we need to use PRINTER_INFO_4 on |
61 | * NT-class systems to avoid Windows looking too hard for them and |
62 | * slowing things down; and we need to avoid PRINTER_INFO_5 as |
63 | * we've seen network printers not show up. |
64 | * On 9x-class systems, PRINTER_INFO_4 isn't available and |
65 | * PRINTER_INFO_5 is recommended. |
66 | * Bletch. |
67 | */ |
68 | if (osVersion.dwPlatformId != VER_PLATFORM_WIN32_NT) { |
69 | ret->enum_level = 5; |
70 | } else { |
71 | ret->enum_level = 4; |
72 | } |
73 | |
a5751e2d |
74 | retval = printer_add_enum(PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS, |
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75 | ret->enum_level, buffer, 0, nprinters_ptr); |
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76 | if (!retval) |
77 | goto error; |
78 | else |
79 | buffer = retval; |
80 | |
4c48c989 |
81 | switch (ret->enum_level) { |
82 | case 4: |
83 | ret->info.i4 = (LPPRINTER_INFO_4)buffer; |
84 | break; |
85 | case 5: |
86 | ret->info.i5 = (LPPRINTER_INFO_5)buffer; |
87 | break; |
88 | } |
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89 | ret->nprinters = *nprinters_ptr; |
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90 | |
91 | return ret; |
92 | |
93 | error: |
94 | sfree(buffer); |
95 | sfree(ret); |
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96 | *nprinters_ptr = 0; |
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97 | return NULL; |
98 | } |
99 | |
100 | char *printer_get_name(printer_enum *pe, int i) |
101 | { |
102 | if (!pe) |
103 | return NULL; |
104 | if (i < 0 || i >= pe->nprinters) |
105 | return NULL; |
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106 | switch (pe->enum_level) { |
107 | case 4: |
108 | return pe->info.i4[i].pPrinterName; |
109 | case 5: |
110 | return pe->info.i5[i].pPrinterName; |
111 | default: |
112 | return NULL; |
113 | } |
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114 | } |
115 | |
116 | void printer_finish_enum(printer_enum *pe) |
117 | { |
118 | if (!pe) |
119 | return; |
4c48c989 |
120 | switch (pe->enum_level) { |
121 | case 4: |
122 | sfree(pe->info.i4); |
123 | break; |
124 | case 5: |
125 | sfree(pe->info.i5); |
126 | break; |
127 | } |
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128 | sfree(pe); |
129 | } |
130 | |
131 | printer_job *printer_start_job(char *printer) |
132 | { |
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133 | printer_job *ret = snew(printer_job); |
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134 | DOC_INFO_1 docinfo; |
135 | int jobstarted = 0, pagestarted = 0; |
136 | |
137 | ret->hprinter = NULL; |
138 | if (!OpenPrinter(printer, &ret->hprinter, NULL)) |
139 | goto error; |
140 | |
141 | docinfo.pDocName = "PuTTY remote printer output"; |
142 | docinfo.pOutputFile = NULL; |
143 | docinfo.pDatatype = "RAW"; |
144 | |
145 | if (!StartDocPrinter(ret->hprinter, 1, (LPSTR)&docinfo)) |
146 | goto error; |
147 | jobstarted = 1; |
148 | |
149 | if (!StartPagePrinter(ret->hprinter)) |
150 | goto error; |
151 | pagestarted = 1; |
152 | |
153 | return ret; |
154 | |
155 | error: |
156 | if (pagestarted) |
157 | EndPagePrinter(ret->hprinter); |
158 | if (jobstarted) |
159 | EndDocPrinter(ret->hprinter); |
160 | if (ret->hprinter) |
161 | ClosePrinter(ret->hprinter); |
162 | sfree(ret); |
163 | return NULL; |
164 | } |
165 | |
166 | void printer_job_data(printer_job *pj, void *data, int len) |
167 | { |
168 | DWORD written; |
169 | |
170 | if (!pj) |
171 | return; |
172 | |
173 | WritePrinter(pj->hprinter, data, len, &written); |
174 | } |
175 | |
176 | void printer_finish_job(printer_job *pj) |
177 | { |
178 | if (!pj) |
179 | return; |
180 | |
181 | EndPagePrinter(pj->hprinter); |
182 | EndDocPrinter(pj->hprinter); |
183 | ClosePrinter(pj->hprinter); |
184 | sfree(pj); |
185 | } |